QZHR Fan Coil Fläkt Woods 9324 GB 2014.04 1 Specifications are subject of alteration without further notice. QZHR Fan Coil Functions • Horizontal installation • Cooling (2 pipes) • Heating (4 pipes or electrical heater) • Available pressure up to 160 Pa Following many years of experience in the field of heating and air conditioning, Fläkt Woods has developed a range of high pressure fan coils for concealed installation and connection to a duct system. They supply a consistent air flow with static pressure up to 160 Pa. The fan assembly has 4 speeds, 3 of them are connected. A range of 7 models to fit most conditions is available with the combination of either 3, 4 or 6 rows coils and 2 or 4 pipes configurations with additional heat exchanger. Quick Selection Cooling Entering air temperature: 27 °C dry bulb - 19 °C wet bulb. Entering water temperature: 7 °C , Δt 5 °C Size Speed Air flow m3/h Cooling kW Available pressure Pa Sound pr. L p dB(A) 14 MAX 140 6.11 75 55 24 MAX 1825 8.44 80 55 34 MAX 2440 11.18 70 60 44 MAX 3020 14.23 67 61 54 MAX 3850 18.52 70 63 64 MAX 4800 24.19 150 68 74 MAX 7100 33.09 150 72 Product Facts • 5 sizes from 13 to 76 (Q = 790 - 7435 m3/h & P = 4.28 - 40.83 kW). • 2-pipe system - 3, 4 or 6 rows coil. • 4-pipe system - 1 or 2 rows additional coil. • Centrifugal fans. • 3 connected speeds and 4 speeds available. • Easy to install and maintain. • Compliant with ERP 2013 Product code example Cassette unit QZHR-13-2-2-1
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QZHR Fan Coil
Fläkt Woods 9324 GB 2014.04 1 Specifications are subject of alteration without further notice.
Following many years of experience in the field of heating and airconditioning, Fläkt Woods has developed a range of high pressure fan coilsfor concealed installation and connection to a duct system. They supply aconsistent air flow with static pressure up to 160 Pa. The fan assembly has 4speeds, 3 of them are connected. A range of 7 models to fit most conditions isavailable with the combination of either 3, 4 or 6 rows coils and 2 or 4 pipesconfigurations with additional heat exchanger.
Quick SelectionCoolingEntering air temperature: 27 °C dry bulb - 19 °C wet bulb.Entering water temperature: 7 °C , Δt 5 °C
Size Speed Air flow m3/h Cooling kW Availablepressure Pa
Sound pr. L p dB(A)
14 MAX 140 6.11 75 5524 MAX 1825 8.44 80 5534 MAX 2440 11.18 70 6044 MAX 3020 14.23 67 6154 MAX 3850 18.52 70 6364 MAX 4800 24.19 150 6874 MAX 7100 33.09 150 72
Product Facts
• 5 sizes from 13 to 76 (Q = 790 -7435 m3/h & P = 4.28 - 40.83 kW).
• 2-pipe system - 3, 4 or 6 rows coil.• 4-pipe system - 1 or 2 rows
additional coil.• Centrifugal fans.• 3 connected speeds and 4 speeds
available.• Easy to install and maintain.• Compliant with ERP 2013
Product code example
Cassette unit QZHR-13-2-2-1
QZHR Fan Coil
Description
Fläkt Woods 9324 GB 2014.04 2 Specifications are subject of alteration without further notice.
Casing
It is made from galvanized steel insulated with polyolefin(PO) foam (class M1).
Fan assembly
Consists of quiet centrifugal fans in galvanized steel withtwo impellers and a directly-driven, single-phase fourspeed motor, 230V 50Hz, with capacitor, insulation classB.
Coil
It is manufactured from drawn copper tube and thealuminium fins are mechanically bonded onto the tube byan expansion process.The connections are on the left hand side looking from theair inlet of the unit (see dimensions pages).On request or on site the connections can be moved to theother side.The coil is not suitable for use in corrosive atmosphereor in environments where aluminium may be subject tocorrosion.
Filter
The filter is made of polypropylene cellular fabricregenerating filter. The filter frame of galvanized steel isinserted into special PVC sliding guides fastened to theinternal structure for easy insertion and removal of thefilter.Easy access to the filter for cleaning operation.On request is available a 48 mm synthetic filter, G3,efficiency of 84% Eurovent EU3 or F6 (only size 6 and 7)according to EN779.
QZHR Fan Coil
QZHR Nominal performances
Fläkt Woods 9324 GB 2014.04 3 Specifications are subject of alteration without further notice.
2-pipe units, sizes 1 to 5 with 4 rows
CoolingEntering air temperature: 27 °C dry bulb - 19 °C wet bulbEntering water temperature: 7 °C , Δt 5 °C
HeatingEntering air temperature: 20 °CEntering water temperature: 50 °CSame air flow as cooling conditions
(*) = The sound pressure levels are 9 dB(A) lower than the sound power levels and apply to the reverberant field of a100m 3 room and a reverberation time of 0.5 sec.
Operation limits, designations
Highest water inlet temperature + 80 °CLowest water inlet temperature + 5 °CHighest working pressure 8 bar
Highest air inlet temperature + 40 °CLowest air inlet temperature + 6 °CHighest air outlet temperature + 50 °CSuitable relative humidity 15-75%
Supply Single phase 230V 50Hz
Motor electrical data (max. absorption)
Model QZHR-1 QZHR-2 QZHR-3 QZHR-4 QZHR-5 QZHR-6 QZHR-7230/1, W 240 412 523 765 885 1437 281750Hz? A 1.09 1.91 2.45 3.62 4.01 6.38 12.4
QZHR Fan Coil
Water pressure drop
Fläkt Woods 9324 GB 2014.04 5 Specifications are subject of alteration without further notice.
2-pipe unit
10001
50
10
5
2000 3000 4000 5000 10000
QZHR 64
QZHR 74
QZHR 66
QZHR 76646464747474
666666 767676
The water pressure drop figures refer to a mean watertemperature of 10 °C for different temperature, multiplythe pressure drop figures by the correction factors K.
°C K20 °C 0.9430 °C 0.9040 °C 0.8650 °C 0.8260 °C 0.7870 °C 0.7480 °C 0.70
4-pipe unit, heating battery pressure drop
10001
50
10
5
2000 3000 4000 5000 10000
QZHR 62
QZHR 72626262 727272
The water pressure drop figures refer to a mean watertemperature of 65 °C for different temperature, multiplythe pressure drop figures by the correction factors K.
°C K40 °C 1.1450 °C 1.0860 °C 1.0270 °C 0.9680 °C 0.90
QZHR Fan Coil
Dimensions, weight, water content
Fläkt Woods 9324 GB 2014.04 6 Specifications are subject of alteration without further notice.
B39 39
Ø 16236
209
243
169209
169
25 B
DAGAA EE E
25
22
40
4026
50
26
243
103
103
25 B
N HL DD C C D D
LH M NM
25
F.A.F.A.
FAN SIDE(OUTLET)
FAN SIDE(OUTLET)
FILTER SIDE(INLET)
FILTER SIDE(INLET)
F.A. F.A.
F
4 3 2 1 4321
Standard left connections, right connections (on request)
Dimensions
Dimensions (mm) CoilModel 2 pipes 4 pipes
A B C D E F G H L M N 1 IN 2 OUT 3 IN 4 OUTQZHR-1 1133 698 310 255 991 620 1185 54 245 50 249 3/4" 3/4" 3/4" 3/4"QZHR-2 1133 698 310 255 991 620 1185 54 245 50 249 1" 1" 3/4" 3/4"QZHR-3 1133 698 360 305 991 620 1185 54 295 50 299 1" 1" 3/4" 3/4"QZHR-4 1445 853 360 293 1302 775 1497 58 291 54 295 1 1/4" 1 1/4" 1" 1"QZHR-5 1445 853 435 368 1302 775 1497 58 367 54 370 1 1/4" 1 1/4" 1" 1"QZHR-6 1535 1100 488 421 1393 1022 1587 59 416 55 421 1 1/4" 1 1/4" 1" 1"QZHR-7 1535 1100 588 521 1393 1022 1587 59 516 55 521 1 1/4" 1 1/4" 1" 1"
QZHR Fan Coil
Dimensions, weight, water content
Fläkt Woods 9324 GB 2014.04 7 Specifications are subject of alteration without further notice.
Fläkt Woods 9324 GB 2014.04 8 Specifications are subject of alteration without further notice.
Often sound levels are the key influencing factor in the selection of equipment. The notion sound power is oftenconfused with the notion sound pressure. The two notions can be defined as follows :
Sound power (Lw) Sound pressure (Lp)
Sound power is the output required producingsound pressure waves. It is not, as such, directlymeasurable.Sound power is established by measuring thesound pressure on the inner surface of a sphereplaced around the source. It is measured andstated in Watts.Sound power is therefore a measurement, whichis not dependent on area or distance, and it isused as a basis for all acoustic data.
This is the alternating pressure produced bywaves from a sound source. It is a measure of thenoise level or noise intensity.Sound pressure is dependent on the averageabsorption factor of the room, distance fromthe sound source, the position of the unit in theroom, the occupation and is therefore not suitablefor calculations of sound propagation or spread.
An explanatory example:
The sound power level can be compared with the heating capacity of a boiler. This capacity will remain the sameregardless of the thermal characteristics of the installation.The sound pressure level can be compared with the temperature obtained in a room supplied from the boiler. Obviously,the temperature will vary depending upon the room characteristics and so it is with sound pressure.Therefore, accurate comparisons between competing equipment should always be made, in the case of the boiler, bycomparing boiler capacity and in case of fan coil units by comparing the sound power levels.
Conversion: Sound power level dB(A) => Sound pressure level dB(A)
Distance from the sound source in meters
Del
iver
y fa
ctor
Soun
d di
ffere
nce
DL
=
Lw -
Lp (
dB )
Room volume (m )3
10
20
50
8
4
2
1
100
7060403020151086543210,5
35
30
25
20
15
10
65
0
500 1000 2000 5000 10000 20000 30000
100
50
200
500
1000
2000
5000
4
5
6 37 2
1Unit fixed to the wall
Unit fixed in a corner
Unit can radiate in all directions
Unit fixed into a ceiling
Free field
factories a = 0. 05 swimming halls
class rooms a = 0. 1 hospital rooms
houses, offices, hotel rooms a = 0. 15 meeting rooms, theatres
reading rooms, television studios a = 0. 25 stores
radio studios a = 0. 4 music rooms
Absorption surface 5m Sabin
a = 0. 03
Example
Office 5,25 m x 4,15 m x 2,75 m => Room volume : 60 m 3QZBA-13:sound power level at low speed is 40 dB(A)Absorption factor a : 0.15
Distance from the source : 2 mDirection factor : 2Dt L : 6 dBSound pressure level : Lp = Lw(A) - ∆LLp = 40 - 6 = 34 dB(A)
QZHR Fan Coil
Practical guidelines
Fläkt Woods 9324 GB 2014.04 9 Specifications are subject of alteration without further notice.
Precautions to be taken before and duringinstallation
• Units are carefully inspected and tested prior todelivery.
• The water system must be carefully designedand balanced if the fan coil system is to performcorrectly.
• The units should be installed in such a wayto allow easy access for maintenance andadjustments.
• It is important that the unit is placed level orslopes slightly towards the condensate drain side.
• Sufficient slope of the drain system shall beassured for a quick condensate removal = 2 %(min. 2 cm/m).
• The inlet water connections for cooling andheating are always the lower of the coilconnection.
• Although units equipped with water controlvalves have been carefully checked at the factory,it is advisable to check the tightness of all pipeconnections on site using a spanner.
• Make sure that the condensate will drain offfreely.
• Do not connect the drain system directly tothe drainpipe of the main drip tray but usethe drainpipe of the auxiliary drip tray for theevacuation of the condensate.
• It is recommended to seal the joint between theunit and the auxiliary drip tray with a sealer.
• The distance between the air intake side and thefloor or wall should be minimum 100 mm.
• Make sure that no shelving or furniture obstructsfree air circulation.
• Dispose of packaging material in accordancewith local requirements.
Electrical connections
• All motors are tested prior to delivery.
• The voltage of the motor is stated on theidentification label of each unit.
• The electrical wiring of the units should be doneby an authorised electrician in accordance withthe local regulations.
• The electrical heating elements must only befactory installed.
• The electrical installation should be of permanenttype and the unit protected by means of fuses inthe power supply from the mains.
• Incorrect field wiring will cause motor damage.
• Always use the same power supply circuit for thefan coil system (fan coil units, thermostats, etc. ..)
• Do not connect more than one fan coil unit to onecommon speed selector switch.
• In master/slave applications, check carefully theequipotentiality of the electrical connections.
Control system
• When the fans are not running, it is stronglyadvisable to ensure that the chilled water supplyto the coils is automatically shut off, to preventcondensation in and on the unit.
• Units equipped with electrical heating elementsmust be connected to a regulation withpermanent ventilation.
Starting-up
• Check that the coils have been cleaned after theinstallation work.
• Check the water system and open the valves forthe water supply.
• Check that the water connections do not leak.
• Open the venting screws and check that there isno air in the coils.
• Equalisation of the pressure drop across thewhole water system is recommended.
• Check that the fan impeller rotates freely and inthe correct direction.
• Run the fan at high, medium and low speed andcheck that no mechanical noise can be heard.
• Check that the unit is well secured and does notvibrate.
• Check the performance of the supervisorysystem.
Maintenance
• Before performing any service or maintenanceoperations, turn OFF the main power supply.
• Inspect the unit at regular intervals.
• The frequency of cleaning the coil and the driptray depend on local conditions.
• The coil should be cleaned on both sides. Use avacuum cleaner with a rubber nozzle.
• Work carefully to avoid damaging the coilsurfaces.
• Check that the drainpipe is clean and notclogged.
• The motor bearings are permanently lubricatedand do not require lubrication.
• The standard filters are of the washable type andshould be cleaned when clogged.
• Check min. once a month the filter – finalpressure drop is recommended up to 25 Pa.
• The frequency of filter cleaning or replacementis dependent on the dust content in the returnair. (our recommendation: Max. 1 month afterstarting-up period and further min. every 3months)
QZHR Fan Coil
Practical guidelines
Fläkt Woods 9324 GB 2014.04 10 Specifications are subject of alteration without further notice.
WARNING!
• The cooling and heating output of the unit willbe reduced if the unit is running with cloggedfilters.
• Unit mounted electrical heating elements caninfluence the sound level of the units.
• Dirty/clogged filters will increase the sound leveland are harmful to the operation and working-expenses of the units.
• Prolonged operation with a dirty / clogged filtermay lead to deterioration of the motor.
• To avoid breaks caused by ice, please empty thewater circuit when the room temperature goesdown to 0 °C .
QZHR Fan Coil
Accessories
Fläkt Woods 9324 GB 2014.04 11 Specifications are subject of alteration without further notice.
A 48 mm thick plate filter is available. The filter is awashable synthetic fibre, flame-proof according to ClassF1 DIN 53438. Efficiency of 84%., Eurovent EU3. The filteris supplied as an accessory and must be fitted on the uniton site in place of the standard filter.
AA
C
Model A B C Product codeQZHR 1-2 48 285 1000 QZAZ-09-03-10QZHR 3 48 335 988 QZAZ-09-03-30QZHR 4 48 335 1298 QZAZ-09-03-40QZHR 5 48 410 1298 QZAZ-09-03-50QZHR 6 48 460 1385 QZAZ-09-03-60QZHR 7 48 560 1385 QZAZ-09-03-70
F6 synthetic filter
High efficiency compact filter in glass microfiber paper,Class F6 in according to EN779. The filter is supplied asan accessory and must be fitted on the unit on site in placeof the standard filter.
Model A B C Product codeQZHR 6 98 460 1385 QZAZ-09-06-60QZHR 7 98 560 1385 QZAZ-09-06-70
GAV Anti-vibrating connection
Intake/supply anti-vibrating connection, made of twogalvanized frames and a PVC flexible connection.
110A
B
Model A B Product codeQZHR 1-2 1138 296 QZAZ-13-10QZHR 3 1138 346 QZAZ-13-30QZHR 4 1450 346 QZAZ-13-40QZHR 5 1450 421 QZAZ-13-50
QZHR Fan Coil
Accessories, air side pressure drop
Fläkt Woods 9324 GB 2014.04 12 Specifications are subject of alteration without further notice.
Sizes to 1 to 5
QZHR Fan Coil
Accessories, air side pressure drop
Fläkt Woods 9324 GB 2014.04 13 Specifications are subject of alteration without further notice.
A power board can be supplied as an accessory to the QZHR unit, together with a control panel to be installed on thewall. The power board is made up of an electronic control board, a power relay module for managing the fan load anda 230/24 volt power transformer, all contained in a galvanised plate case to be secured to the side of the unit. The powerboard can manage the correct operation of the fan.
Modulating valve control board (ETN 500 control, air temp. probe and low temp. cut-out thermostat included):QZAZ-12-20
QZHR Fan Coil
Standard control valve kit for QZHR
Fläkt Woods 9324 GB 2014.04 15 Specifications are subject of alteration without further notice.
Water pressure drop
Legendqw = water flow (l/h)Δp = pressure drop (kPa)
QZHR Fan Coil
Product code
Fläkt Woods 9324 GB 2014.04 16 Specifications are subject of alteration without further notice.
QZHR Power high pressurefan coil unit
QZHR-aa-b-c-d
Version (aa)R = horizontal basic unit -without decorative cabinet
Water connection (b)Looking into the air outlet1 = Right hand unit - Water connectionson the right side of the unit2 = Left hand unit - Water connectionson the left side of the unit