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Prohibition symbol Failure to observe instructions marked with a prohibition symbol may result in serious injury or death.
Danger symbolFailure to observe instructions marked with a danger symbol may result in personal injury and/or damage to the unit.
These instructions’area of use
These instructions apply to EXHAUSTO air handling units. Please refer to the separate product instructions for accessories and extra equipment.
These instructions must be fully observed to ensure personal safety, to protect the equipment and to ensure correct operation of the air handling unit. EXHAUSTO A/S accepts no liability for personal injury or material damage caused by failure to follow the guidelines and instructions in this manual when installing and/or using the product.
Accessories The checklist on the front of these instructions shows which accessories have been delivered with the air handling unit.
NB When retro-fitting accessories from EXHAUSTO, please update the list on the front cover.
Definition In the type designations, R stands for Right, which means that the supply air is to the right of the unit, as seen from the operating side. L (Left) indicates supply air on the left-hand side.
Drawings An indication in the bottom right-hand corner of the drawings in this manual states whether the unit shown is a Right or Left unit.
Warnings:Do not open …
the service doors before the electrical supply has been disconnected at the repair switch.
Not suitable for …The air handling unit is not to be used to transport solid particles, nor in areas where there is a risk of explosive gases.
No ductconnection
If one or more of the spigots is not connected to a duct:Fit the protective net to the spigots with a maximum mesh width of20 mm.
Lock down the VEX during operation
The VEX must always be locked down duringoperation:
• either using the locking cylinder in the handle. Remember to remove the key from the lock.
• or using a padlock via the built-in padlock fittings in the handle.
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Designations in this manual
Component designation
Function Component designation
Function
HCE Electric heating coil TE11 Temperature sensor, extraction
TSA70 Overtemperature electric heating coil (automatic reset)
TE21 Temperature sensor, outdoor air
TSA90 Overtemperature electric heating coil (manual reset)
AFC1 Airflow control, extraction EON CO2 ROOM/EON CO2 DUCT
CO2 sensor, room/extraction duct
AFC2 Airflow control, supply air EON PRESSURE Pressure sensor for constant pressure regulation
M1 Extraction fan motor EON RH ROOM Humidity sensor, room
M2 Supply motor LSF/LSFR Closing damper, outdoor air
TSA1 Overheating extraction fan motor LSA/LSAR Closing damper, exhaust
TSA2 Overheating supply motor BT40/BT50 Fire thermostat, 40°C/50°C (extraction)
BT70 Fire thermostat 70°C (supply)
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3001640-VEX140H-HCE-2011-01-01 Product information
1.Product information
Comfort ventilation EXHAUSTO air handling units are used for ventilation tasks in the area of Comfort ventilation. The operating temperature range for the unit is -30°C… 35°C, outdoor air temperature.
Not suitable for … The air handling unit is not to be used to transport solid particles, nor in areas where there is a risk of explosive gases.
Positioning As standard, the unit is designed for indoor placement.
1.2.1 Spatial requirements
The section below states how much space is needed for the side-mounted doors to be opened to enable service procedures on the unit – including filter replacement and cleaning the cross-flow heat exchangers.
NB! For service reasons there must be a free height of minimum 200 mm above theconnection box of the unit.
1.2.2 Requirements for underlying surface
When fitting the unit directly to an existing surface – i.e. without using the mounting base (accessory) – the surface must be:
• smooth• horizontal (+/- 3 mm per metre)• hard• resistant to vibration
Outlet Condensation outlet, see the chapter entitled “Mechanical assembly”.
1.1 Usage
1.2 Requirements for surroundings
VEX 140HL
1385
700
652
RD10
182-01
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1.2.3 Requirements for the duct work system
Silencers The duct work system must be fitted with silencers specified by the person responsible for the project, in accordance with the requirements for the area of use.
Bends Duct bends can be fitted immediately after the unit, as the air from the spigot flows at a uniformly low speed, resulting in negligible system pressure loss.
Insulation The duct work system is to be insulated out of consideration for• condensation• noise• loss of heat/cooling
Condensation If the exhaust air has very high levels of humidity, condensation can form in the exhaust air duct. EXHAUSTO recommends that a condensation outlet is installed at the exhaust air duct’s lowest point.
No ductconnection
If one or more of the spigots is not connected to a duct:Fit the protective net to the spigots with a maximum mesh width of20 mm.
1.3.1 The function of the air handling unit
The air handling unit is variably adjustable and consumes little energy.
Indoor climate level
The control unit allows three indoor climate levels
*) The DISPLAY panel is used to set the air replacement and temperature deviation values, see the chapter entitled “The DISPLAY panel” and the supplement entitled “List of alarms and menus for VEX140-150-160-170”.
The applicable indoor climate level can be controlled in four ways: • via a weekly schedule, which, on the basis of the requirements entered for the
operation of the unit, is entered into the automatic weekly clock via the DISPLAY panel.
• via a TOUCH panel in the room. The TOUCH panel is used to signal to the control system that there are people in the room, or that people have left the room.
• via a BMS and LONWORKS®. Instructions for LONWORKS® are available on request from EXHAUSTO.
• via ITool – a modem or TCP/IP-based network that can monitor and control one or more units through a PC (or a mobile phone).
See the chapter entitled “Commissioning and operation”.
1.3 Description
Indoor climate level
Energy-saving
People in the room
Air-replacement *)
Deviation from the required room temperature *)
Ventilation blocked
- No No ventilation No control of room temperature
Economy Large No Low, step 1 Larger temperature deviation permitted *)
Standby Small No Low, step 1 Minor temperature deviation permitted *)
Comfort None Yes High, steps 1–10
Precise temperature
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1.3.2 The design of the air handling unit
Layout drawing The drawings below show the layout of the unit (shown without service doors)
1,1,A
2,1,A1,2,A
2,2,A
1
2
345
678910
11
12
13
14
15
17 18 19 2016 21
RD10
181-01
VEX140HLVEX150HLVEX160HL
17181920 1621
1,1,A
2,1,A
1
2
3
45
6 7 8 9 10
1,2,A
2,2,A
11
12
13
14
15
VEX140HRVEX150HRVEX160HR
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The cabinet The in-door and exterior of the cabinet are made of sheet aluminium-zinc. The spaces between the panels are insulated with 50 mm mineral wool.
Fans The unit contains two centrifugal fans for extraction and supply air.
Cross-flow heatexchanger with bypass
The cross-flow heat exchanger in the unit is fitted with a modulating bypass damper. The cross-flow heat exchanger can be removed and cleaned.
Filters The unit includes compact filter for both extraction and supply air.
Pos. no. Part Function
1 Spigot 2,1,A Spigot for outdoor air. This spigot can also be positioned on the top of the unit (2,1,B).
2 Closing damper, LS Closing damper, outdoor air, LSF (accessory).
3 Filter for outdoor air Filters the outdoor air.
4 Bypass damper with motor For operation with heat recovery, the bypass damper is closed so that the air passes through the cross-flow heat exchanger. For bypass operation, the damper is open, and the airflow bypasses the exchanger.
5 Spigot 1,1,A Spigot for extraction air. This spigot can also be positioned on the bottom of the unit (1,1,B).
6 Condensation outlet Channels condensation to the drain.
7 Cross-flow heat exchanger Channels the heat from the extraction air to the supply air.
8 Filter for extraction air Filters the extraction air.
9 Condensation tray Collects the condensate and leads it from the cross-flow heat exchanger to the condensation outlet.
10 Electric heating coil Heats the supply air if the recovered heat is not sufficient.
11 Spigot 2,2,A Spigot for supply air. This spigot can also be positioned on the bottom of the unit (2,2,B).
12 Fan unit For outdoor air/supply air.
13 Fan unit For extraction air/exhaust air.
14 Closing damper, LS Closing damper, exhaust, LSA (accessory).
15 Spigot 1,2,A Spigot for exhaust air. This spigot can also be positioned on the top of the unit (1,2,B).
16 DISPLAY panel Operation of the control system.
17 Connection box Box for the connection of external ventilation components and control panels.
18 Filter control – extraction, PDS1 Controls pressure loss across the filter for extraction air.
19 Filter control – outdoor air, PDS2 Controls pressure loss across the filter for outdoor air.
20 Spigot for airflow control, AFC Spigot for airflow measurement and regulation.
21 Pull-out panel. Positioning of automatic components.
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VEX140HL The principal dimensions are stated on the following drawing:
NB The drawing shows all possible spigot locations.
1.4 Principal dimensions
1,2,A
2,2,A1,1,A
2,1,A
M N
NM
1,2,B 2,1,B
2,2,B 1,1,B
1,1,A
1,2,A
2,2,A
2,1,A
287,5
513 353
62 1365 62
222,565
ø16/ø18
287,5 247,5
12299,5
774,5
1062
62
62
475
275
375
475
633,8
375
375
275
700375
750
12259,5
834
61,2
O 315
O 315
O 315
O 315
RD10
303-01
VEX 140HL
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VEX140HR The principal dimensions are indicated on the following drawing:
NB The drawing shows all possible spigot locations.
1,2,B2,1,B
2,2,B1,1,B
1,1,A
1,2,A
2,2,A
2,1,A
287,5
513353
62 1365 62
222,5 6
ø16/ø18
287,5247,5
1,2,A
2,2,A
2 9
7
66
2
475
275
1,1,A
2,1,A
375
475
633,8
375
375
275
700375
750
1
9
8
6
NM
M N
5
1
5,92
5,47
201
2
6
2
5,5
43
2,1
2
RD10
304-01
O 315
O 315
O 315
O 315
VEX 140HR
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3001640-VEX140H-HCE-2011-01-01 Handling
2.Handling
Delivery The delivered items are:• Air handling unit• Specified accessories (indicated in the checklist on the front page of the
instructions)
Packaging The unit is delivered attached to a disposable pallet and packed in clear plastic.
NB Once the plastic has been removed, the unit must be protected against dirt and dust.
• The covers on the spigots must not be removed until the spigots are connected to the ventilation duct works.
• Whenever possible, keep the unit closed during assembly.• After it has been in operation for a short period, the VEX unit must be
vacuum cleaned internally to remove swarf, if any, from the duct connections.
.
Transport equipment
Transport the air handling unit in one of the following ways. .
Weight For information about the weight of the unit, see the chapter entitled “Technical specifications”.
2.1 Unpacking
2.2 Transport
By lifting truck or fork-lift … By crane …
Lift the air handling unit on the disposable pallet.
NB: If the disposable pallet cannot be used, the forks on the lifting equipment must be sufficiently long to prevent damage to the bottom of the unit.
Never use a crane to lift the air handling unit by the lifting handles.
Use straps and lifting yokes to prevent damage to the air handling unit.
RD10
248-01
RD10
565-01
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2.2.1 Passage through openings
Height The height of the unit is 1127 mm +62mm for a bottom-mounted spigot, if fitted.
Width The list below shows the widths required to allow the VEX to pass.
*) The measurements are stated on the basis of the exact dimensions of the unit.
Removing the service doors
Remove the service doors as follows:• Open both doors• Dismount door stops (B).• Use a small punch or a similar tool to knock the pins out of the tops of the door
hinges (A). The doors can then be lifted off.
If the width of the aperture is … *) then …
less than 710 mm the unit cannot pass through.
between 710 and 760 mm remove the doors, see the section below.
more than 760 mm the unit can pass through.
Detail A Detail B
A B
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Removing the impeller
Cross-flow heatexchanger
See chapter 6 of the section entitled “Cleaning the cross-flow heat exchanger” for details of how to remove and refit the cross-flow heat exchanger.
Step Action
1 Remove the fixing screw that is seated in the pullout rail and loosen the bindings to the motor cable.
2 Pull the fan unit out to the stop (two screws) on the pull-out rail.
3 Remove the supply cable in the motor terminal box and the hose to the inlet.
4 Remove the two screws from the pull-out rail. The fan unit can now be lif-ted off.
Background It is important that the air handling unit is installed on a horizontal surface, as this influences the collection and draining of the condensate.
3.1.1 Installation directly on the floor.
The requirements for the floor surface must be fulfilled, see the section entitled “Requirements for underlying surface”, chapter 1.
NB After installation, make sure that the air handling unit is completely level.
3.1.2 Installation on mounting base
The EXHAUSTO mounting base enables correct installation of the air handling unit. The mounting base is fitted with adjustable levelling screws so that the air handling unit can be installed completely level on uneven surfaces (+/- 20 mm per metre). See the separate instructions for the installation of the mounting base.
Connection Connect the condensation outlet to a floor-mounted drain or similar. A water trap must be fitted between the condensation outlet and the drain.
Frost risk If there is a risk of frost:Insulate the condensation outlet and protect it against frost – if necessary, using a heating cable.
Positioning The drawing below illustrates the correct positioning of the water trap from the condensation outlet.
NB If the unit is installed on an EXHAUSTO mounting base, there will be sufficient free height to fit a water trap.
3.3.1 Measurement of pressure loss across filters (applies only to VEX100VDI)
VDI6022 approval also means that pressure loss across the filters must be measurable during operation. This means a U-pipe manometer must be fitted for every exterior filter fitted on the VEX.
The section “Maintenance” states how often the filters should be inspected and replaced.
Fitting of U-pipe manometer
Step Action
1 Fit the U-pipe manometer and air bleeders with the supplied screws in the punched holes.
2 Fit the hoses from each air bleeder down to the manometer. See picture.
• The installation of the supply cable must be carried out in accordance with applicable regulations and legislation.
• The earth terminal (PE) must always be connected.
Diagram The electrical supply and the repair switch must be connected as shown in the diagram in the section : “Connection diagram for electrical supply and connection box”.
4.2.1 Fuses and supply cable
Fuses The fuses must be suitable for:• Short-circuit protection of the unit• Short-circuit protection of supply cable• Overload protection of supply cable
Power supply cable
When dimensioning the supply cable, the conditions at the installation location – including temperature and the path of the cable – must be taken into consideration.
• The unit must be protected against indirect contact.
• If earth leak circuit breakers are fitted in the installation, they must be of a type that breaks the circuit when they register vagrant power supply with DC content (pulsating DC, RCCB breaker type A, in relation to standard EN61008). The earth leak relays must be marked with the following symbol:
• Leak current of up to 300 mA can be generated.
Dimensioning EXHAUSTO recommends the following dimensions for fuses and supply cables:FC-motor
4.3.2 Connection diagram for supply voltage and connection box
Diagram The diagram below illustrates the connection of the supply voltage, the DISPLAY panel and various accessories that must be connected to the connection box.
* Not supplied by EXHAUSTO.** Only for external fitting.
Cable type A shielded cable of type 2 x 2 x 0,5� is to be used for the EON bus.Connection The conductors and shield must be connected correctly as illustrated in the chart below.
Step Action
1 The 0V and 24V conductors must be twisted together. SCL and SDA must be twisted together.Drawing symbol: twisted-pair conductors
2 The conductors in the EON bus must be stripped to the correct length and must not be damaged, as this may cause them to break.
3 All screws in the EON connector must be tightened.
4 The shield in the EON bus must be terminated correctly in the connection box. The shield wire must be connected to the 0V conductor.
5 The shield in the EON bus is continued in the individual modules. Use the cable tie to squeeze the foil from each cable together.
The external EON terminals are used to connect the following components:• TOUCH panel (EON-TOUCH 6/8)• DISPLAY panel (EON-DISPLAY-8)• EON-PRESSURE• EON-CO2• EON-RH
4.4.1 Connection of DISPLAY panel
The fitting plate must be installed on a flat, even surface.To remove the DISPLAY panel from the fitting plate, carefully insert a screwdriver into the slots on each side of the panel and prise it loose. The panel can then be removed.
NB The DISPLAY panel is connected to the unit on delivery from the factory. For external connection, see the section entitled “Connection diagram for electrical supply and external connection box”.
4.4.2 Connection of TOUCH panelTo separate the TOUCH panel, first remove the frame. There are two screws at the back of the frame which hold the insert in place. Once you have loosened the screws, carefully remove the insert.
Diagram Connect the TOUCH panel as shown in the diagram below:
4.4 Connection to terminals, EON external
A: From previous EON moduleor external connection box
4.4.3 Setting the address and function of the TOUCH panel
Settingoptions
• Set the address and function to the values stated in the installation specifications or in the chart on the following page.
• Each panel must be allocated a unique address number (from 0 to 7).
NB After the required settings have been entered, disconnect the power supply at the main switch and then restart the unit.
FUNCTION set to …
Function
1 Timer function. Overrides to Comfort level in pre-set time.
2 Timer function, master. Overrides to Comfort level in pre-set interval. Resets all other panels to zero.
3 Manual function, master.
Manual change of level of operation, either for starting or stopping the unit (outside the clock program) or for temporarily changing the level of operation until the clock takes over (switches) again. Resets all other panels to zero.
4 Holiday function. Stops the unit until the next time that the panel is activated.
5 Manual function. Manual change of level of operation, either for starting or stopping the unit (outside the clock program) or for temporarily changing the level of operation until the clock takes over (switches) again.
Complete form The form below must be completed when setting the address and function of the TOUCH panels.:
4.4.4 “On-demand” control via constant pressure regulation
Setting and connection of the address of the analogue EON-PRESSURE module:Setting address 0 or 1
NB After the required settings have been entered, disconnect the power supply at the main switch and then restart the unit. In addition, fill out the label on top of the module.
ConnectionEON-PRESSURE
Control panel no.Position in the room …
Address set to … Function
EON-PRESSURE:Address 0Pressure measurement, extraction duct0...10V = 0...500 Pa
Address 1Pressure measurement, supply air duct0...10V = 0...500 Pa
Setting and connection of the address of the analogue EON-CO2 module:Setting address 2
NB After the required settings have been entered, disconnect the power supply at the main switch and then restart the unit. In addition, fill out the label on top of the module.
4.4.6 “On-demand” control via humidity measurement
Setting and connection of the address of the analogue EON-RH module:Setting address 3
NB After the required settings have been entered, disconnect the power supply at the main switch and then restart the unit. In addition, fill out the label on top of the module.
3001640-VEX140H-HCE-2011-01-01 Commissioning and operation
5.Commissioning and operation
To prevent overheating, the supply airflow must not be less than 220 m3/h (60 l/s) for operation involving the electric heating coil.
During the commissioning phase, it may be necessary to work with the control system boxes open. Some components in these boxes must only be touched with tools that are electrically insulated.
Before any and all work on motor controls or the motor’s cables and terminal boxes, the power supply must be disconnected for at least 5 minutes to allow the capacitors to discharge.
Do not touch the heating coil, as this can cause burns.
NB The fans run on for three minutes. This ensures that the heat from the electric heating coil is fully exploited.
Before starting the initial adjustment
• Keep the supplement entitled “List of alarms and menus for VEX 100” nearby, as you will need it during the initial adjustment procedure.
• Check that the electrical supply is connected.• Set the DISPLAY panel to technician mode, see the sections entitled “5.6.2
Operation of the DISPLAY panel” and “5.6.4 Switch between user modes”.• Use menu 921 to check that the expected control panels and EON modules
have been fitted. During the initial adjustment of the airflow, we recommend disconnection of the following modules: EON-CO2, EON-RH and EON-PIR.
• Check that the fire thermostats (if fitted) have been fitted correctly according to the simplified diagram in the introduction. Activate the thermostat mechanically, and check that the unit stops. Reset the thermostat manually, then reset “alarm 82” in the DISPLAY panel. Repeat this test for all the thermostats fitted.
• Check that the closing dampers (if supplied) have been fitted correctly according to the simplified diagram in the introduction. Start the unit by selecting step 1 in menu 1, and check that the damper opens.
5.2.1 Measuring points for determining the airflow
The measuring points in the unit are used to determine the airflow through the unit. The method is described in detail in the section entitled “Measuring points for VENT arrangement”.
5.1 Commissioning
5.2 Initial adjustment of airflow
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5.2.2 Balance (menu 514)
Balance is the desired relationship between the fan speed and the supply air and extraction airflows.
The balance can only be maintained within certain areas of operation, limited by factors including:
• Duct characteristics• Minimum fan revolution• Minimum airflow required• Maximum airflow required
Examples of balance
The examples show a unit with manual fan control and a balance of 0.80 and 1.20, respectively.
Area The required airflow is …
A outside the operational scope of the unit
B balanced
C not balanced
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5.2.3 Selection of airflow regulation method
Airflow regulation methods
MethodMethod no.
DescriptionSetting
Extraction Supply air
Manual control 1 Manual control of fan speed % Balance
Airflowcontrol
2 Maintains the airflow, compensating for changes in the duct work system,filter clogging, etc.
Requirements:Airflow measurement sensors, AFC1/AFC2, available as accessories.
m3/hl/s
Balance
Constant pressure regulation of extraction
3 Constant pressure-regulated extraction with set supply air.
Requirements:Sensor for measuring underpressure in the extraction duct, EON-PRESSURE, available as an accessory.
Pa %
5 Constant pressure-regulated extraction slave-controlled supply air.
Requirements:Sensor for measuring underpressure in the extraction duct, EON-PRESSURE, available as an accessory.
Pa Balance
Constant pressure regulation of supply air
4 Constant pressure-regulated supply air with set extraction.
Requirements:Sensor for measuring overpressure in the supply air duct, EON-PRESSURE, available as an accessory.
% Pa
6 Constant pressure-regulated supply air with slave-controlled extraction.
Requirements:Sensor for measuring overpressure in the supply air duct, EON-PRESSURE, available as an accessory.
Balance Pa
Constant pressure regulation of both extraction and supply air
7 Constant pressure regulation of both extraction and supply air.
Requirements: Sensor for measuring underpressure in the extraction duct, EON-PRESSURE, available as an accessory.
Sensor for measuring overpressure in the supply air duct, EON-PRESSURE, available as an accessory.
Pa Balance
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Specialist mode Set the DISPLAY panel to specialist mode, (see the section entitled “Switch between user modes”).
Go to menu 571 … Select airflow regulation method (1…7).
Method 3 – Constant pressure-regulated extraction with set supply air.Method 5 – Constant pressure-regulated extraction with slave-controlled supply air.Method 7 – Constant pressure-regulated extraction and supply air.
Setting …Go tomenu …
Action
min. extraction airflow
1 • Select step 1.
511 • Adjust the value to reach the minimum projected extraction airflow.
max. extraction airflow
1 • Select step 10.
512 • Adjust the value to reach the maximum projected extraction airflow.
balance 514 • Set the balance to reach the projected supply airflow.
Setting …Go to menu …
Action
extraction pressure at Economy/Standby
1 • Select step 1.
511 • Adjust the value to reach the projected extraction pressure.
extraction pressure at Comfort
1 • Select step 10.
512 • Adjust the value to reach the projected extraction pressure.
Method 3:constant supply airflow
5311 • Set the required constant supply airflow.
Method 5:balance at Comfort
514 • Set the balance to the maximum projected supply airflow.
Method 7:balance at Comfort
514 • Set the balance to the maximum projected supply air pressure. The supply air pressure can be calculated as follows:
Supply air pressure = Extraction pressure x Balance
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Method 4 or 6 Method 4 – Constant pressure regulation of supply air with set extraction.Method 6 – Constant pressure regulation of supply air with slave-controlled extraction.
5.2.4 Comfort setting in (menu 1)
• Go to menu 513
NB Irrespective of the setting in menu 513, the user can always select OFF in menu 1.
Re-set the DISPLAY panel to technician mode, (see the section entitled “Switch between user modes”).
5.2.5 Re-connection of EON modules
If modules EON-CO2, EON-RH and EON-PIR have been removed, they must be re-connected.
5.2.6 Compensation of airflow
Compensation Compensation of the airflow is carried out by a closed sensor sending signals to the automatic control system, which, on the basis of these signals, can then reduce or increase the required airflow. Airflow compensation can always be carried out, irrespective of whether the unit is in Economy, Standby or Comfort mode.
Airflow compensation can be carried out on the basis of the following measurements:• Outdoor temperature, (airflow reduced as the temperature falls).• Air quality in the room (CO2 content of the air).• Humidity of the air in the room (RH of the air).
All compensation options can be connected and active at the same time, and so can be used simultaneously to control the airflow.
Setting …Go tomenu …
Action
supply air pressure at Economy/Standby
1 • Select step 1.
511 • Adjust the value to reach the projected supply air pressure.
supply air pressure at Comfort
1 • Select step 10.
512 • Adjust the value to reach the projected supply air pressure.
Method 4:constant extraction airflow
5211 • Set the required constant extraction airflow.
Method 6:balance at Comfort
514 • Set the balance to the projected extraction airflow.
Select inmenu 513
when …
User The user can set the Comfort level from step 1…10. Typically used for methods 1 and 2.
One of steps 1…10 The Comfort level setting must be fixed. The Comfort level is typically set to step 10. Should be used for methods 3–7.
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Reading ofcurrent controlsignals
The current control signals for extraction and supply air are shown in the chart below. In the row for the airflow regulation method selected, (if necessary, see the section entitled “Selection of airflow regulation method”), you can see which menu contains the set points for extraction and supply air.
5.2.7 External compensation of airflow (menu 54)
Function When the control system is in operation, this function can be used to reduce the required airflow if the outdoor temperature is falling.
Selection of outdoor air compensation
Example: Compensation of airflow for outdoor air temperature
Airflow regulation method (menu 571)
Control signal – extraction, menu no.
Control signal – supply air, menu no.
1 521 531
2 5221 5321
3 5231 5311
4 5211 5331
5 5231 531
6 521 5331
7 5231 5331
StepGo to menu
…Action
1 541 Activation – Select Yes.
2 542 If appropriate, select new T_LO temperature (The lower set point for outdoor air temperature compensation).
3 543 If appropriate, select new T_HI temperature (the upper set point for outdoor air temperature compensation).
1. Comfort airflow at step 7.
The outdoor temperature is … Airflow is …
A lower than T_LO equivalent to airflow at step 1.
B between T_LO and T_HI gradually reduced between Comfort airflow and step 1.
C higher than T_HI equivalent to Comfort airflow.
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5.2.8 CO2 compensation, (menu 55)
Requirements A CO2 sensor (EON-CO2) must be fitted before you can select CO2 compensation of the airflow.
Function When the automatic control system is operative, this function can be used to increase the required airflow when the CO2 concentration in the room increases.
NB The CO2 level is not used to start or switch operating level.
Selection of CO2 compensation
Example: CO2 compensation
StepGo to
menu …Action
1 — Connect the EON-CO2 module as described in the supplementary instructions.
2 — Switch on the power supply to the unit.
3 55 To see the current CO2 level in the room.
4 551 If appropriate, select new CO2_LO value (the lower set point for CO2 compensation).
5 552 If appropriate, select new CO2_HI value (the upper set point for CO2 compensation).
1. Comfort operation.2. Economy or Standby operation.
The concentration of CO2 in the air is …
Airflow …
A less than CO2_LO equivalent to the step shown in menu 1.
B between CO2_LO and CO2_HI gradually increased from the step shown in menu 1 to the airflow at step 10.
C higher than CO2_HI increased to the airflow at step 10.
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5.2.9 Humidity compensation of airflow (menu 56)
Requirements An RH sensor (EON-RH) must be fitted in order to be able to select humidity compensation of the airflow. The sensor is placed in the room where you wish to make the compensation – for example, in a bathroom or similar.
Function When the automatic control system is in operation, this function can be used to increase the required airflow when the humidity level in the room rises.
NB Humidity compensation of the airflow is not used to start or switch operating level
Selection of humidity compensation
Example:Humidity compensation
StepGo to
menu …Action
1 — Connect the EON-RH module as described in the supplementary instructions.
2 — Switch on the power supply to the unit.
3 56 To see the current humidity measurement in the room.
4 561 If appropriate, select new RH_LO temperature (the lower set point for humidity compensation).
5 562 If appropriate, select new RH_HI temperature (the upper set point for humidity compensation).
1. Comfort operation.2. Economy or Standby operation.
The humidity level in the air is …
Airflow …
A less than RH_LO equivalent to the step shown in menu 1.
B between RH_LO and RH_HI gradually increased from the step shown in menu 1 to the airflow at step 10.
C higher than RH_HI increased to the airflow at step 10.
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5.3.1 Temperature adjustment
Temperature adjustment is carried out as serial regulation of the following elements:
• Modulating heating coil• Modulating bypass of cross-flow heat exchanger• If required, control of external cooling unit (EON-XCU)
Select You can choose between:
• Supply air regulation (menu 681 = no):Typically used when the unit serves several rooms with different loads (sun, people, machines). The temperature is regulated in relation to the built-in temperature sensor in the supply air spigot.
• Room temperature regulation (menu 681 = yes)Typically used when the unit serves several rooms with identical loads. The temperature is regulated in relation to the built-in temperature sensor in the extraction spigot or via an external duct or room sensor (accessory).
Compensation Each form of regulation provides different options for set point compensation.
5.3 Initial adjustment of temperature
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Basic settings Before choosing a regulation method, a number of basic temperature settings should be considered. To carry out all the settings, follow the instructions in the sections below.
5.3.2 Limits for supply air temperature
NB The settings below only need to be altered if you have special requirements. Otherwise, the factory settings can be used.
Min. temperature
Max. temperature
Max. ΔT-temperature
ΔT-Comfort
ΔT-Standby
T_COOL_ECO
T_HEAT_ECO
Temperature-
adjustment-
method
Limits for supply temperature,
section 5.3.2
Limits for indoor climate level,
section 5.3.3
Supply temperature regulation,
section 5.3.4
Room temperature regulation,
section 5.3.5
External compensation
of
the supply temperature
Summer compensation
of
the room temperature
Setting …Go to
menu …NB
lowest permissible supply air temperature …
643 possible setting: 10°C...20°C
highest permissible supply air temperature
644 possible setting: 30°C...40°C
lowest permissible supply air temperature below room temperature
645 this makes it possible to prevent condensation on the supply air battery, andsudden temperature drops.Possible setting: t: 2°C...15°C
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5.3.3 Limits for indoor climate level
NB The settings below only need to be altered if you have special requirements. Otherwise, the factory settings can be used.
NB The setting ranges for the points listed above depend on the choices made in menu 2, and the settings limit each other.
Example: Set point temperature 22°C:
Setting …Go to
menu …NB
permissible temperature deviation at Comfort level.
661 • This point cannot be higher than menu 662.
• This temperature difference acts as a neutral zone between the post-heating coil and the cooling unit – if fitted – during Comfort operation.
permissible temperature deviation at Standby level.
662 • This point cannot be lower than menu 661.
• This temperature difference acts as a neutral zone between the post-heating coil and the cooling unit – if fitted – during Standby operation.
set point for temperature regulator for the cooling unit – if fitted – at Economy level.
663 This temperature applies for Economy level irrespective of the selection made by the user in menu 2.
set point for temperature regulator for post-heating coil at Economy level.
664 This temperature applies for Economy level irrespective of the selection made by the user in menu 2.
T_Comfortmax. 40oC
T_Comfort22oC
T_Comfortmin. 10oC
Bypass T_Comfort (+/- 1K)
T_Standby(+/- 3K)
(22-1 = 21oC)
(22-3 = 19oC)
T_Heat Economy(e.g. 16oC)
Coolingrequirement
Heatrequirement
Comfort Standby Economy
T_Cool Economy(e.g. 30oC)
(22+3 = 25oC)
(22+1 = 23oC)
RD
1273
1GB-
01
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5.3.4 Supply air temperature regulation
Technician mode Set the DISPLAY panel to technician mode, (see the section entitled “Switch between user modes”).
Go to menu 681 … If you require supply air temperature regulation, select “no”.
Outdoor air compensation
If you require outdoor air compensation, select a value in accordance with the information below.
Outdoor air compensation aims to compensate for the energy that a building radiates when the outdoor air temperature is low, or absorbs when the outdoor air temperature is high, thus maintaining a constant temperature in the building.
Example: Supply airtemperature 20°C
If the supply air temperature is too … then menu …
cold when the temperature outdoor is low, 6421 and/or
6422 must be raised.
hot when the temperature outdoor is low, 6421 and/or
6422 lowered.
cold when the temperature outdoor is high, 6423 and/or
6424 must be raised.
hot when the temperature outdoor is high, 6423 and/or
6424 lowered.
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5.3.5 Room temperature regulation
Technician mode Set the DISPLAY panel to technician mode, (see the section entitled “Switch between user modes”).
Go to menu 681 … If you require room temperature regulation, select “yes”.
Summer compensation
If you require summer compensation, select a value in accordance with the information below.
The function of summer compensation is to raise the room temperature when the temperature outdoor is high, to reduce the temperature difference people experience when entering or leaving the building. This results in a better indoor climate.
Example: Room temperature20°C
If the room temperature is too … then menu …
cold when the temperature outdoor is high, 6521 must be lowered and/or
6522 must be raised.
hot when the temperature outdoor is high, 6521 must be raised and/or
6522 lowered.
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5.4.1 HCE safety functions
Slope limitation of output supplied
• Output supply limited to max. 25% per minute.• Output removed without slope.• The slope may result in the heating output figure shown (menu 61) exceeding
the actual output value.
Maintaining the correct temperature in the heating coil
Two thermal triggers ensure that the heating coil doesn’t overheat.• The TSA70 disconnects at 70°C and resets automatically.• The TSA90 disconnects at 90°C and is reset manually.
Communication monitoring
• If communication between the HCE master and the control system breaks down, the output requirement is reset to zero and an alarm is triggered.
Airflowmonitoring(accessory)
If an airflow monitoring unit (AFC2) is fitted, this can be chosen to ensure that the minimum airflow is maintained:
NB If heating is required and the airflow is not higher than 220 m3/h (60 l/s), an alarm will be triggered.
5.4.2 Registration of icing in the cross-flow heat exchanger
Temperatureregistration
When temperature registration is selected, the exhaust temperature in the unit is measured. Icing is registered when the temperature falls below the value selected for longer than the selected time delay.
Selection of temperature
Selection of time delay
NB The de-icing procedure is always terminated when the exhaust temperature (TE12) is 2°C higher than the TE12 temperature setting.
5.4 Safety functions
Step Action
1 Set the DISPLAY panel to specialist mode.
2 Go to menu 573.
3 Select yes.
Step Action
1 Select menu 723.
2 Select the temperature required.
Step Action
1 Select menu 724.
2 Select the time delay required.
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5.4.3 De-icing function
How doesice form?
Icing on the extraction side of the cross-flow heat exchanger results from a combination of:
• High humidity in the extraction air.• Low outdoor air temperature• Large difference in temperature between outdoor air and extraction air.
Settingthe alarm time
If de-icing cannot be carried out satisfactorily, the unit stops and an alarm is triggered. An alarm is triggered if the de-icing process is not completed before the alarm time selected has expired.
Selection of method
Air reduction For de-icing by air reduction, the supply air airflow is reduced to level 1. If de-icing has not been completed after half the alarm time has elapsed, the supply air fan will stop.
Bypass de-icing Bypass de-icing is carried out as follows:
Step Action
1 Select menu 727.
2 Select the alarm time required
If the required method is … then in menu …
Air reduction (reduction of supply air airflow) select .
Bypass de-icing select .
Phase Description
1 The control system registers icing on the cross-flow heat exchanger.
2 The bypass damper opens slowly (10% per minute). The normal temperature regulation system will deal with supplying power to the electric heating coil.
2a If the energy supply is not sufficient, the following safety system will come into effect.
• The bypass damper remains in its position when the temperature in the return pipe falls below 7°C above the “stop limit” (menu 713). At factory settings: 13°C + 7°C = 20°C.
• The bypass damper closes slowly when the temperature in the return pipe falls below 5°C above the “stop limit” (menu 713). At factory settings: 13°C + 5°C = 18°C.
3 When ice is no longer registered on the cross-flow heat exchanger, the bypass damper will close again slowly (10% per minute).
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5.4.4 Operating mode in the event of fire
3 operating modes
You can choose between three different operating modes in the event of fire. The operating mode selected should abide by the legislative requirements from the local authorities:
Operating mode activation
The selected operating mode under the Fire Alarm function is activated if the closedcurrent circuit on one of the two inputs (BT40/50 and BT70) on the connection board isbroken.These inputs may be used to connect:
• Smoke detectors• Fire thermostats (e.g. BT40, BT50 or BT70)• BMS• Fire control systems
If an input is not used it should be bridged.
5.4.5 BT, Fire thermostats
Background A fire thermostat is a temperature-controlled electrical circuit breaker fitted in the aspiration and/or extraction ducts. If the air temperature exceeds the level set in the thermostat, the contact set breaks the circuit and the continued operation of the ventilation unit is then determined by the mode of operation (method 0, 1 or 2) selected in menu 731. Reconnection, which must be carried out manually via the thermostat, cannot be completed until the air temperature has dropped by at least 15ºC.
Thermostat properties
The fire thermostats must feature the following properties:• Potential free switch.• Closed circuit principle:
• closed power circuit = no alarm• broken power circuit = alarm.
• Manual reset of the thermostat itself.• Good quality thermostats and sensors that are suited to the purpose.
Extraction duct – BT40/50
The contact set breaks at air temperatures in excess of 40°C/50°C. For positioning in the extraction duct.
Aspiration duct – BT70
The contact set breaks at air temperatures in excess of 70°C. For positioning in the aspiration duct.
Go to menu 731 and select method …
Operating mode
0 (factory setting) Supply air and extract air stopped.
1 Supply air stopped and extract air 100%.
2 Supply air and extract air 100%.
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Testing the fire thermostats
If the installation features multiple fire thermostats, these must be tested individually.Test the fire thermostats as described in the chart below:
5.5.1 List of EON modules connected
5.5.2 Language selection
NB Some menus are displayed in English, irrespective of the language chosen.
Step Action
1 Check the DISPLAY panel. The light diode must not be red (it may be yellow).
2 Trigger a single fire thermostat as follows:• Use the fire thermostat test function (if it has one), • or use hot air, • or remove a cable from the fire thermostat.
3 Check the DISPLAY panel. The light diode should now be red.• Select menu 3, check that “A30” is displayed in line 2 along with the time
and date.
4 • Reset the fire thermostat or reconnect the cable.
5 Go to menu 82 in the DISPLAY panel.• Select “yes” to acknowledge the alarm.
6 Check that the light diode on the DISPLAY panel is not lit (or shines yellow).
7 Repeat all the steps from 3 onwards for the remaining fire thermostats.
5.5 Service
Step Action
1 Select menu 921 and check the total number of EON modules connected.
2 Push and turn the switch, review the list of EON modules connected.
Step Action
1 Select menu 932.
2 Push the switch and turn it backwards or forwards until the language required is shown in the display.
3 Press again to select the new language.
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5.6 The DISPLAY panel
5.6.1 DISPLAY panel – QUICK GUIDE for the VEX100 range
Operating switch•Turn the switch to move between menus in the display. •Press the switch to set the value in the menu (menus 1 and 2 only).
Display Daily users have access to menus 1, 2 and 3.
The light
Information list
*) Only shown if the accessory in question is fitted.
Menu Display Function
1 1 Airflow* Step 7
Setting the airflow to Comfort level.
2 2 Temperature* 20 °C
Setting the required temperature.
3 3 10:43 Fri Comfort (AUT)
Time, day and indoor climate level. The alarm and information numbers are displayed in the bottom line when the light is illuminated.
When menu 3 displays …
and the lamp is …
then ... In menu 3, read ...
A.. redan alarm has been triggered in the unit.
the alarm number (e.g. A14) and contact the person responsible for operation. You will find a list of alarms in the supplement entitled “List of alarms and menus for VEX140-150-160”.
i.. yellowoperation is inconsistent.
the information number (e.g. . i20) and identify the cause from the list below. Then contact the person responsible for operation.
.. Reset menu 82
yellowinconsistent is operation.
info number. This is the number of an active piece of information that has been pushed out of the alarm list memory (which can hold up to 10 pieces of information) on account of a periodical information message on the list. Go to menu 82 to reset the list.
Info. no. in menu 3 means … Info. no. in menu 3 means …
i20 De-icing of the cross-flow heat exchanger started.
i61 Extraction: airflow lacking *).
i40 EON bus unit(s) lacking. i62 Extraction: pressure lacking *).i42 DISPLAY panel set to specialist mode
connected.i65 Filter control for outdoor air triggered.
i43 Timer backup battery exhausted i66 Supply : airflow lacking *).i50 Thermal cut-out TSA 70 for the electric
i60 Filter control for extraction triggered. i73 airflow to cooling unit lacking *).
Operating switchLight
Display
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5.6.2 Using the DISPLAY panel
The display The user interface is built up of menus shown on an LCD display (consisting of 216 characters).
Editing Editing is possible when the menu status field displays *:
1. Press the operating switch.
2. The value in the status field flashes – start editing.
3. Set the value by turning the operating switch:• turn the switch clockwise to increase the value,• turn the switch anti-clockwise to decrease the value.
4. Press the operating switch to save the value selected and conclude the editing process.
Figure Display text
A Menu number, the number of digits corresponds to the submenu level.
B Text
C Menu status field
D Value and unit, if any
1 Airflow *Step 5
A
B
C
D
Menu status field displays Press operating switch …
No function
> Go to submenu …
< Return to main menu
* Editing possible
value(flashes) Editing in progress
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5.6.3 Operating modes
The operation of the air handling unit can be carried out in three modes, depending on the person operating the unit and on which settings are to be entered. The chart below illustrates the three modes.:
Example: The chart shows the setting options in each operating mode for the regulation of the extraction airflow:
NB Note how the specialist mode settings limit the technician’s setting scale (25–100%) and how the settings in technician mode define the user’s scale (step 1 = 50%, step 10 = 85 %).
Factorysettings
The actual settings of the unit are listed in the “List of alarms and menus for VEX100”.
Operating mode PersonOperating options in the DISPLAY panel
User mode Users in the room – office staff, for example.
Menus 1–3
Technician modeThe person responsible for the operation of the unit.
The entire menu structure is visible, but the setting options are limited to the menus marked with an asterisk (*) in the DISPLAY panel.
Specialist modeEXHAUSTO’s service fitters / specially trained personnel.
The entire menu structure and all setting options are accessible.
U_fan_start
U_fan_max
U_fan_exhaust
U_fan_supply
FanSpeed_max
FanSpeed_min
FanSpeed_comfort
Technician modeMenu 511 og 512
Setting: 25...100%
Specialist modeMenu 574
Setting: 10...100%
U_fan_exhaust_min
1
2
34
5
67
8
910
10
20
30
40
50
60
70
80
90
100
0
1
2
3
4
5
6
7
8
9
10
0
FanSpeed_exhaust
FanSpeed_supply
% Volt
User modeMenu 1
Setting: step 1...10
1 Airflow *Step 6
512 Step 10 *85 %
511 Step 1 *50 %
574 Motor_1_MIN *25 %
0
100
%
(Menu 911)(Menu 521)
Depends on the motor type.
Can not be changed.
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5.6.4 Switch between user modes (user/technician/specialist)
When the control system is exited, it must be left in user mode.
Switch to technicianmode
Returning touser mode
Switch to Specialist mode In specialist mode you can set parameters that affect the fundamental
set-up of the unit. Do not use this mode unless you have received sufficient instruction or training
The drawing shows the sliding switch behind the DISPLAY panel:
Sliding switch Normal operation. User and technician modes.
Sliding switch Specialist mode:
• Set the sliding switch to position .• Use the push button on the panel to confirm.
• The display shows .
• The diode will now be yellow, indicating that specialist mode has been activated.
REMEMBER … to return the sliding switch to its original position , before leaving the installation.
Action … Menu displays …
Go to menu 3. 3 10:43 Fre Comfort(AUT)
Press and hold in switch for approx. 5 sec. until code appears in the display.
Technician code0000
Enter the four-digit code: 3142. Turn the switch to select each figure and then press to confirm.
Technician code3142
You are now operating in technician mode. 4 Mode >
Action … Menu displays …
Go to menu 4. 4 Mode <
Turn the switch to the left until the menu displays EXIT. EXIT <
Press the switch.
You are now operating in user mode. 3 10:43 Fri Comfort(AUT)
9 Service >
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Pre-programming The weekly clock is pre-programmed at the factory with the following periods and climate levels:
Example: The graph shows the climate level setting for the period in question. Below the graph, you can see the graphic display that also shows the second line of the display (16 characters at a time).
Summertime The clock automatically switches to summer and winter time (the night before the last Sunday in March, and the night before the last Sunday in October).
C The arrow points to the current climate level in line 2.
D Text
E Menu status field
F Graphic presentation of climate level, 1 block = 10 min.
Mon 00:00 � EDIT *¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤
A
B C
E
F
D
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Before changing the pre-programmed weekly clock
• Determine the ventilation requirements for every day of the week:Divide the days into periods on the basis of ventilation requirements: Comfort – Standby – Economy – Off (see section 1.3 for a description of these levels). An example of a period could be: Monday 08.00–16.00 Comfort operation.
• Make the required changes to all the weekdays one by one in menu 423.
Example –reprogramming
The example below shows how to re-programme the weekly clock, step by step.
NB • When programming, it is only possible to turn the timer forwards. If you turn the timer too far forward for a block, the period will be overwritten, and the overwritten time will have to be reprogrammed again.
New settings following reprogramming.
Step Action Display Timer
1. • Press .• Select EDIT by turning and pressing.
Mon 00:00 � EDIT *¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤
2. • Press to edit the figures.(Setting the start time for the first block).
Mon 00:00 � OFF *¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤
3. When the time is correct:• Press to save.
Mon 05:00 � OFF *¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤
4. • Turn forwards until you reach the climate level required, and then press to save.
Mon 05:00 � ECO *¤¤¤¤¤¤¤¤¤¤¥¤¤¤¤¤
5. • Select the finish time for the block and press to save.
Mon 06:50 � ECO *¥¥¥¥¥¥¥¥¥¥¥¤¤¤¤¤
6. Return to step 1 to edit the next period, if necessary.
Weekdays Period Climate level
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5.8 The TOUCH panel
5.8.1 TOUCH panel – QUICK GUIDE for the VEX100 range
Operating switches
The lights
SwitchPress the switch when …
Activation of ventilation by …
NB
A there are people in the room.
high air replacement (preset level).
Can be set for automatic cut-out via the timer function.
B people leave the room.
low air replacement or stop (preset level).
Can be set to cut out other TOUCH panels, if any.
Light is … Meaning
C
red Alarm. Contact the person responsible for operation.
yellow unusual operation. If the light remains illuminated for an extended period, contact the person responsible for operation.
D green High air replacement selected from this panel.
AB
C
D
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5.8.2 The diodes
5.8.3 Using the TOUCH panel to adjust the indoor climate
The clock (menu 4) The clock is used to control the programmed weekly plan for indoor climate levels. The clock basically “decides” the applicable indoor climate level.
Function 2 selectedThe chart below shows the applicable climate level when the TOUCH panel is activated (and function 2 “Timer function – Master” has been selected behind the panel. See the section entitled “Setting the address and function of the TOUCH panel”):
*) Menus 431– 438 can be used to set the time limitation.
Diode … Meaning
A is red Alarm, contact the person responsible for operation. Read the alarm number from the DISPLAY panel in menu 81 and refer to the section entitled “List of DISPLAY panel alarms”.
A is yellow The filters in the unit must be replaced.
B is green Comfort level operation – selected from this panel.
B is not illuminated • Economy or Standby operation. • Unit off.• Comfort level operation – but selected from a different
panel.
A
B
Indoor climate level according to the clock’s
weekly plan
Indoor climate level when you press
Indoor climate level when you press
Comfort Standby Comfort (timer defined)*)
Standby Standby Comfort (timer defined)*)
Economy Economy Comfort (timer defined)*)
Unit stopped Unit stopped Comfort (timer defined)*)
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Method of operation
The filter controls monitor the filters in the air handling unit by registering pressure drop across them. A filter control is fitted to each filter. When the pressure drop exceeds the value entered for the filter control, the light diodes on the DISPLAY and TOUCH panels turn yellow. The information number i..in menu 3 indicates which filter control has been triggered.
Positioning The filter controls are fitted in the connection box at the top of the VEX unit. The filter controls are secured with snap locks so they are easy to remove for setting purposes, for example.
Factory setting From the factory, the filter controls are set to the lowest value on the scale. The diode on the panels will therefore turn yellow when the unit is started.
Settingthe filter controls
EXHAUSTO recommends that you replace the filters when the pressure drop has increased by 100 Pa, which is equivalent to a reduction of the airflow by 12–15%. However, the filters must be inspected every 6 months, and must be replaced at least once a year. The filter control values can be altered if a different interval between filter replacements is required, or if requirements regarding the permissible drop in the unit’s airflow before filter replacement have been laid down.
NB Before setting the filter controls:• Initial adjustment concerning the max. airflow of the unit must be carried
out.• The filters must be clean.
Set the filter controls as described in the chart below
5.9 Setting the filter controls
Step Action
1 Remove the lid from the connection box.
2 Use the DISPLAY panel to set the max. airflow:• Select menu 1 and set the value (0–10) to 10 or to the maximum
applicable airflow.
3 Make sure that any dampers in the duct system are open.
4 Turn the filter control scale up until the (yellow) diode on the DISPLAY panel is extinguished.
5 Slowly turn the filter control scale down until the (yellow) diode on the DISPLAY panel is illuminated again.NB The system reacts very slowly, so the adjustment must be carried out slowly. Repeat the adjustment process if necessary.
6
7 Determine the pressure drop value for filter replacement (EXHAUSTO recommends setting the filter control to the value read + 100 Pa).
8 Set the filter control so that the arrow points to the required pressure drop.
Read the value indicated by the arrow.
RD10
274-01
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6.Maintenance
Layout drawing The drawing shows the positioning of the measuring points for the VENT arrangement in the unit:
6.1 Measuring points for pressure, temperature and air-flow
VEX 140-150-160
Hose no. 1 2 3 4 5 6 7 8
Designation on drawing
qv2- qv2+ qv1- qv1+ PDS2- PDS2+ PDS1- PDS1+
Hose colour pink red light blue blue light green green light brown brown
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Measurements
Type Calculations
Airflow Use the following equation and the “Duct 12” diagram at the end of this section to calculate extraction airflow qv1.
Use the following equation and the “Duct 22” diagram at the end of this section to calculate supply airflow qv2.
Pressure loss for
Extraction filters are calculated on the basis of the following equation.
Outdoor air filters are calculated on the basis of the following equation.
Cross-flow heat exchanger, extraction side, is calculated on the basis of the following equation.
Cross-flow heat exchanger, supply side, is calculated on the basis of the following equation.
pHCE is stated in the section entitled “Technical specifications”.
Pressure rise across the fans
Extraction side, is calculated on the basis of the following equation.
p12 is measured in duct 12.
Supply side, is calculated on the basis of the following equation.
p22 is measured in duct 22.
Temperature efficiency
Read the temperature in the DISPLAY panel, and calculate the efficiency as follows:
When taking temperature measurements, the energy supply to the post-heating coil must be disconnected (see the item concerning heating coils) and the outdoor air temperature must be below +10 °C.NB: When comparing with catalogue data, the volume flow ratio must be 1.0 or 0.8.
Assimilated output
• The total electricity supply to the fans and electric heating coil is to be measured in the respective power supply cables by the service switch or the fuse box.
NB: The actual output of the heating coil may be limited by the temperature conditions. Please also refer to the specifications and information plate.
The chart below contains the recommended intervals for maintenance ofthe unit. The intervals are guidelines for normal operating conditions. EXHAUSTO recommends that you adapt the maintenance of the unit to suit the applicable operating conditions.
6.2.1 Cleaning the fans
6.2 Maintenance chart
Months
12 24
Filters
• To be replaced when the diode on the panels turns yellow. The information number in menu 3 indicates which filter control has been triggered. When you remove the filters, immediately place them in a plastic bag, seal it and dispose of it in a responsible manner. You should change the filters at least once a year.
×
• Check that the seals in the filter frames seal tightly. ×
Seals and sealing strips
• Check that they all seal tightly. ×
Fans and heating coil
• Check. ×
• Cleaning – see the following section. ×
Cross-flow heat exchanger/bypass damper
• Check. ×
• Cleaning as required – see the following section.
Condensation outlet
• Pour water into the condensation tray to check that the outlet is not blocked.
×
Checking the safety functions
• Fire thermostats ×
Closing damper and flue gas damper
• Check ×
Step Action
1 Switch off the power supply to the unit at the repair switch.
2 Clean the impeller with a vacuum cleaner and wipe down with a damp cloth if necessary. Clean the blades on the impeller carefully to avoid disrupting the balance. If there are weights on the impeller, these must not be removed.
3 After cleaning the impeller, check that the unit does not vibrate when operating.
Checking the hoses to the measuring points
4 Remove the hoses from the connection box.
5 Blow through the hoses to remove impurities.
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6.2.2 Cleaning the heating coil
6.2.3 Cleaning the cross-flow heat exchanger
Step Action
1 Switch off the power supply to the unit at the repair switch.
2 Vacuum clean the heating coil.
3 Check that the fins on the heating coil are not deformed.
The fins are sharp.
Step Action
1 Switch off the power supply to the unit at the service switch.
2 Remove the contact between the bypass motor and the unit.
3 Remove the cross-flow heat exchanger.
4 Press the trigger button on the bypass motor and turn the damper to open the blind.
5 Remove the bypass motor before the cross-flow heat exchanger is cleaned with water. See the drawing.
Do not activate the trigger button on the bypass motor while it is disassembled as this will alter the position of the motor in relation to the damper.
6 Spray the cross-flow heat exchanger with hot water. You can also use a high-pressure water jet to clean it. Max. water temperature 90°C.
7 Refit the bypass motor. The damper must be in the same position (air vane fully open) as when the motor was removed.
8 Close the air vane, replace the cross-flow heat exchanger and re-connect the bypass motor cable.
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3001640-VEX140H-HCE-2011-01-01 Troubleshooting
7.TroubleshootingNB In the event of errors or irregular operation of the unit.
• Check the alarm list in menu 81 on the DISPLAY panel to see the alarm message, and then refer to the supplement entitled “List of alarms and menus for VEX140-150-160-170”.
Alarm listmenu 81
Press and turn the switch on the DISPLAY panel to view the last 10 alarms on the alarm list.
The alarms are divided up into two levels:• Alarms named: A01, A02, A...
These alarms must be investigated and reset straight away.• Information messages named: i20, i40, i...
Identify the cause …
Alarms may only be reset if the cause of the alarm has been corrected.
Menu 82 All the alarms can be reset in one of the following ways: • Resetting alarms by selecting “yes” in menu 82 (“Reset alarm”). • Switch off the power supply to the unit for around 30 seconds.
Multiple alarms If several alarms are active, they will all be cancelled simultaneously.
Repeated alarms If an alarm is triggered repeatedly, contact a service technician.
81 Alarm list *
A14 22 Mar 13:02
7.1 Resetting alarms
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Error display Errors in the EON-BUS system can be displayed in the following ways:• The DISPLAY panel shows one of the following alarm or information codes:
i40, A41, A55, A56.• The background illumination in the DISPLAY panel flashes.• The DISPLAY panel monitor is blank.
Start by … • disconnecting the DISPLAY panel from the test cable in the connection box, if necessary.
• disconnecting the cables from all other modules• disconnecting the cables from terminals 5, 6, 7, 8, 9, 10, 11 and 12.
Short-circuit errors If you discover that the communication section of the automatic products is burned out, it is likely that the cables have short-circuited. Therefore, check the cables and set-up before replacing the automatic products with new ones.
7.2 Trouble-shooting via the EON BUS
External Connection Box Module
Step Action Expected values Comments
Checking the unit
1 Measure supply voltageTerminals 5–6 and 9–10
24VDC (19,2 - 24V)
2 Measure communicationData: terminals 5–7 and 9–11
• If the expected voltages are recorded without correct function being achieved, this may be due to inversion of the data and clock (terminal 3 and terminal 4). Alternatively, the module or the connection may be defective.
• If the expected voltages are not recorded, it is likely that there is a fault in the cables or the set-up itself.
Component errors • When replacing defective components, it is a good idea to check the installation for loose connections and damaged cables, which may cause short circuits.
A01 Error in extraction fan motor or the motor’s output control.
NB The alarm can only be reset by disconnecting the supply voltage for approx. 30seconds.
A02 Error in supply motor or the motor’s output control.
NB The alarm can only be reset by disconnecting the supply voltage for approx. 30seconds.
8 Fit the modules one at a time and measure themPower supply: terminals 1–2Data: Terminals 1–3Clock: Terminals 1–4
7.3 Alarm list: Causes of errors and remedial measures
Step Action
1 Check whether the motor or motor control is dirty, as this will cause insufficient cooling.
2 Check that the motor runs at more than 300 rpm when the unit is operating at U1 min.:Overheating may be due to insufficient airflow. Menu 574 can be usedto increase the minimum revolution speed of the motor (25% of max.airflow).
Step Action
1 Check whether the motor or motor control is dirty, as this will cause insufficient cooling.
2 Check that the motor runs at more than 300 rpm when the unit is operating at U2 min.:Overheating may be due to insufficient airflow. Menu 575 can be used to increase the minimum revolution speed of the motor (25% of max. airflow).
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A08–A15 Temperature sensor errors (see alarm overview)
i20 De-icing of the cross-flow heat exchanger in progressIf this information is frequently displayed, it may be due to:
• incorrect setting of the de-icing parameters.• the cross-flow heat exchanger being dirty.
A21 De-icing of the cross-flow heat exchanger not completed correctlyThis alarm is triggered if i20 has been active for longer than the required alarm time (menu 727). Causes of error, see i20.
A30 Fire thermostat disconnected• Check all the fire thermostats connected, and the cables between them. • Reset any disconnected fire thermostats.
The fire thermostats must be connected as a closed circuit, and the circuit must therefore be fully connected at temperatures below the value set for the fire thermostat.
i40 Bus unit missing1. All EON bus units are registered when the unit is started, and are then monitored by the control system.
• A message is generated by the system if a bus unit disappears during operation (i40). If the bus unit in question is important for the operation of the unit, an alarm is triggered and the unit is stopped.
• An i40 message is also sent if the DISPLAY panel is used to switch to specialist mode.
Check that all the panels fitted are registered in the control system:• Go to menu 921• Press the switch.• Turn the switch to check through the list.
2. The cause may also be electrical interference (EMC) from other units or installations.Check that the installation has been set up according to normal EMC guidelines by:
• Moving the EON cable away from other cables, or• Letting other cables cross the EON cable at an angle of 90°.
A41 EON pressure AI module missingAn airflow control method involving pressure measurements has been selected, but the AI module has not been fitted.
• Check that the AI module has been fitted correctly and that the address has been set correctly.
i42 DISPLAY panel in specialist mode connected
i43 Timer backup battery exhausted.
When the alarm number is an …
the error may be due to a …
Registered when the temperature is …
odd number short-circuited sensor below -50°C
even number disconnected sensor above 50°C
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i50 The 70°C overheating thermostat of the electric heating coil – with automatic reset (TSA70) – has been triggered
• If this information appears frequently, check the same points as apply to A51.
A51 The 90°C overheating thermostat of electric heating coil – with manual reset (TSA90) – has been triggered This alarm may have been triggered because the supply airflow through the unit is less than 220 m3/h (60 l/s). Use pressure measurement to check the supply airflow as described in section 6.1, “Measuring points for VENT arrangement”.
A54 Lack of airflow to electric heating coil, HCEThis alarm is triggered if the airflow falls below 220 m3/h (60 l/s), and, at the same time, you wish to increase the heating output.
A56 Lack of communication to electric heating coil, HCEThis alarm is triggered if communication to the HCE module is disrupted for more than 10 seconds. If necessary, see i40.
i60 and i65 Filter control triggeredThis information is displayed when the pressure across the filter is higher than the pressure entered in the pressure switch of the filter control.
• Check that the filter is not dirtyi60: Filter control for extraction filter (PDS1). i65: Filter control for outdoor air filter (PDS2).
• Check the setting of the filter control. If necessary, see the section entitled “Setting the filter controls”.
NB The pressure across the filter depends on the airflow.
i61 and i66 Extraction/aspiration airflow lacking.The deviation has been higher than 25% of the required airflow for more than 5 min.
• Check whether the filter, the unit or the duct system is dirty.• Check that the set point (511/512) is covered by the performance of the unit.• Check whether the AFC has been fitted correctly.
i62 and i67 Extraction/aspiration pressure lacking.The deviation has been higher than 25% of the required airflow for more than 5 min.
• Check whether the filter, the unit or the duct system is dirty.• Check that the set point (511/512) is covered by the performance of the unit.• Check that the VAV damper (if fitted) is functioning correctly.
The alarm may be due to … Check …
the fact that (AFC-alarm) has been selected via the control system, but the AFC accessory has not been fitted correctly.
the accessory:• Go to menu 532 • Read the current airflow and compare it
with the measurement taken from the unit.
the fact that the value selected for MOTOR_2_MIN (menu 575) is too low (depending on duct properties).
the airflow as in A51:
the fact that the filters, ducts, cross-flow heat exchangers or motors are dirty.
Weight Doors 2 13.5 kgCross-flow heat exchanger 27 kgFan unit 2 16.5 kgUnit for internal transport (without doors, fan unit and cross-flow heat exchanger) 105 kgTotal weight of the unit 192 kg
Corrosion class Corrosion class C4 (EN ISO 12944-2)
Temperatureranges:
Medium temperature (air): -30°C...35°CAmbient temperature: -30°C...50°C
Voltage per electric heating bar: 1 × 230 VOutput per electric heating bar: 1.2 kWVoltage supply to connection box:- Star connection 3 × 400V + NThermal cut-out TSA 70: 70°CThermal cut-out TSA 90: 90°CTemperature tolerance: ±5 KTemperature drop before reconnection is possible:15 K
Diagram The diagram below can be used to determine the air temperature increase at a given airflow and electric heating coil area.
Production numberWhen ordering spares, please state the relevant production number. This will make sure that you receive precisely the parts you need. The production number is written on the front page of the instructions supplied with the unit. It is also included on the boilerplate.
Spare Parts List The following parts are available as spare parts for the VEX. Parts not included in the list can be manufactured on request. Please call EXHAUSTO (see phone number on the back of the book of instructions).
*) The correct type cannot be traced via the production number. Instead, please state the data from the component itself or the order number.
8.4 Parts list for ordering spares
Part
1. Impeller.
2. Motor.
3. Bearings set (complete with two bearings and accessories) for repairing a motor.
4. Motor control.
5. Power supply.
6. Automatic device.
7. Temperature sensor (repair set for 1 x sensor).