Design guide for DVM Chiller 1 Design guide for DVM Chiller
Design guide for DVM Chiller
1
Design guide
for DVM Chiller
Modification history
Date Ver. Modifier Modified detail
30 May 17 1.0 Junho Lim - New
23 Mar 18 1.5 F Weddington - North American Market
27 Mar 18 1.6 J McCloskey - Table added, minor changes
Contents
1. Introduction -------------------------------------------------------------------- 04
1-1 Air-cooled chiller vs Water-cooled chiller ------------------------------------------ 04
1-2 What is DVM Chiller ? ------------------------------------------------------------------ 05
2. Basic configurations ---------------------------------------------------------- 06
2-1 Pump system ------------------------------------------------------------------------------ 06
2-2 Chiller arrangement ---------------------------------------------------------------------- 11
2-3 Water piping ------------------------------------------------------------------------------- 13
3. Water piping elements ------------------------------------------------------- 15
3-1 Water pipes -------------------------------------------------------------------------------- 16
3-2 Pumps --------------------------------------------------------------------------------------- 22
3-3 Expansion tank (vessel) ---------------------------------------------------------------- 27
4. Maintenance -------------------------------------------------------------------- 29
4-1 Water pipe installation ------------------------------------------------------------------- 29
4-2 Water quality ------------------------------------------------------------------------------- 32
4-3 Freeze prevention of water pipe ------------------------------------------------------ 33
4-4 Chilled water management ------------------------------------------------------------- 34
5. External contact connection ------------------------------------------------ 37
5-1 A-Terminal block --------------------------------------------------------------------------- 37
5-2 B-Terminal block -------------------------------------------------------------------------- 38
5-3 C-Terminal block -------------------------------------------------------------------------- 45
6. Check before use ------------------------------------------------------------- 56
6-1 Module or group operation ------------------------------------------------------------- 56
6-2 Operation pattern for modules -------------------------------------------------------- 57
7. Product configuration --------------------------------------------------------- 61
7-1 DVM Chiller configuration --------------------------------------------------------------- 61
7-2 Module controller -------------------------------------------------------------------------- 64
Design guide for DVM Chiller
4
1. Introduction
Please note that this document is for reference only and is not an actual design manual.
In practice, construction and plumbing methods may vary according to the project
requirements and local code. To complete design and installation of the system, please
consult your local engineer.
1-1 Air-cooled chiller vs Water-cooled chiller
An air-cooled chiller has a condenser that uses air for heat transfer. Air-cooled chillers are
preferred for small or medium installations but recently the quality improvement in their
structure allows the use in modular setups for large installations as well. An air-cooled
chiller is preferred especially in cases where there is not enough water or the water is very
expensive. Water-cooled chillers have a water cooled condenser connected with a cooling
tower and are usually preferred for medium and large installations where there is a
sufficient amount of water. In addition, they are also preferred in cases where there is a
demand for constant operation of the system, independently of the ambient temperature
(industrial air conditioning, air conditioning of digital systems etc.), because the capacity of
the water-cooled chillers are less affected by the ambient temperature conditions.
Cooling Tower
`
Chiller
` AHU
Cooling
Tower
Circuit
Condenser
Water
Pump
Chilled
Water
Circuit
Chilled Water Pump
( Air-cooled chiller ) ( Water-cooled chiller )
Chiller
` AHU
Chilled Water Pump
Chilled Water
Circuit
Design guide for DVM Chiller
5
1. Introduction
1-2 What is DVM Chiller ?
DVM Chiller is a air-cooled chiller. It is a machine that exchanges heat from water via
vapor-compression. DVM Chiller makes chilled water or hot water and can be used in
various applications such as commercial, industrial, and institutional facilities.
DVM Chiller uses Inverter driven scroll type compressors manufactured by SAMSUNG.
The efficiency of the DVM Chiller is higher than conventional water cooled chiller. Also,
DVM Chiller can be installed and configured into a module system for large installations.
On the water side of the system, the heat source (water) is supplied to DVM Chiller units
throughout the building via the water circuit, which incorporates ancillary elements such as
heat exchangers, pumps, valves, strainers, expansion tanks, air vents and water treatment
equipment etc.
▶ Work scope
Design
- Outdoor unit (Chiller) : Samsung
- Water plumbing including pump : MEP company (Mechanical Engineer)
Design guide for DVM Chiller
6
Approved Modular Combinations
Nominal Tons
Standard High Efficiency
AG010KSVA*H/AA AG015KSVA*H/AARecommended
Pipe DiameterAG010KSVA*H/AA AG015KSVA*H/AA
Recommended
Pipe Diameter
10 1 2"
15 1 2"
20 2 2"
30 2 2 1/2" 3 2 1/2"
40 4 2 1/2"
45 3 3"
50 5 3"
60 4 3" 6 3"
70 7 3 1/2"
75 5 3 1/2"
80 8 4"
90 6 4" 9 4"
100 10 4"
105 7 4"
110 11 4"
120 8 4" 12 4"
130 13 4"
135 9 4"
140 14 5"
150 10 5" 15 5"
160 16 5"
165 11 5"
180 12 5"
195 13 5"
210 14 5"
225 15 5"
240 16 5"
Design guide for DVM Chiller
7
2. Basic configurations
2-1 Pump system
▶ 3 common chilled water system configuration
1) Constant primary flow
2) Primary secondary flow
3) Variable primary flow
Constant primary flow Primary secondary flow Variable primary flow
Application
-Small plants
(Few coils serving
similar loads)
Multiple chiller and
multiple loads where operator
is not existed
(Many coils serving similar
loads or dissimilar loads)
Multiple chiller and
multiple loads with high
loads like data center
(Many coils serving similar
loads or dissimilar loads)
Pump energy Pump energy is wasted50~60% less than
constant primary flow
60~75% less than
constant primary flow
S
y
s
t
e
m
Primary Fixed speed pump Fixed speed pump Variable speed pump
Secondary - Variable speed pump -
Control valve 3Way valve 2Way valve 2Way valve
Remark Simple Common Control complex
Design guide for DVM Chiller
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2. Basic configurations
2-1 Pump system
1) Constant primary flow
The chilled water pumps are constant speed. For constant flow rate, a 3way valve is
placed on the outlet of each coil.
A 3way valve is maintaining the set point of the air leaving temperature.
T
Design guide for DVM Chiller
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2. Basic configurations
2-1 Pump system
2) Primary secondary flow
A decoupler pipe separates the two loops hydronically.
Primary circuit must contain minimum water volume as stated in the installation guide.
T
ΔP
Design guide for DVM Chiller
10
2. Basic configurations
2-1 Pump system
2) Primary secondary flow
✓ Decoupler sizing and location
Decoupler pipe size should cover the flow rate of the largest primary pump.
The pressure drop less than 1.5 ft.
The higher the pressure drop, the more the pumps tend to act like they are in series
instead of independent loops. Proper decoupler size will prevent this from occuring.
✓ Buffer tank
Generally buffer tank is recommended to ensure proper water volume to chillers.
Because if secondary pump stops and primary pump continues running,
then water volume of the system with a decoupler may be too low.
Chiller requires minimum flow rates.
Design guide for DVM Chiller
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2. Basic configurations
2-1 Pump system
3) Variable primary flow
Variable primary flow design uses variable pump instead of constant speed pump.
A bypass valve ensures minimum flow rates. The valve should be automatically
controlled by using flow meter in primary circuit or secondary △P.
T
ΔP
Design guide for DVM Chiller
12
2. Basic configurations
2-2 Chiller arrangement
1) Parallel chillers configuration
Parallel configuration is more common than series configuration.
Parallel configuration use usually same capacity and type of chiller.
``
When only one chiller is operating,
supply chilled water temperature rises.
→ Operating chiller can be reset
to produce target water temperature.
(Increasing chiller energy consumption)
* To avoid this problem,
primary pump must be variable speed.
This can solve the flow mixing problem.
*But below 50% load,
only on chiller pump is operating.
All of coils receive less water flow rate.
Also to avoid “short circuit” problem,
a check valve or isolation valve should be installed.
*ASHRAE Standard 90.1 : When a parallel chiller is shut down, flow rate must be reduced.
`
Design guide for DVM Chiller
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2. Basic configurations
2-2 Chiller arrangement
2) Series chillers configuration
The mixing problem and less flow can be solved in series chiller system.
But each chiller must accommodate double flow rate. This increases pressure drop.
To compensate pressure drop, series chiller applies to low flow system.
[higher ΔT than 14.04 ]
T
T
Upstream chiller Downstream chiller
Parallel chiller Series chiller
63.46 GPMSystem pressure drop : 7.25 psi
126.8 GPMSystem pressure drop : 26.1 psi
Upstream chiller starts first. When upstream chiller can not achieve
target water set temperature, downstream chiller is operated.
Design guide for DVM Chiller
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2. Basic configurations
2-3 Water piping
1) Direct return piping
When designed with direct return piping, the pressure drop and flow rates will be uneven
between near and far side from the pump due to different piping lengths. Because of different
friction loss the water flow rate of each chiller and load will not be same. It requires to install
additional flow control valves near the inlet side of each load to balance water flow.
Pump
Modular Chillers
(installed in parallel)
Fan Coil Units
(installed in parallel)
Profile of Pressure Drop between inlet and outlet
CCCC
C
C
C
C
100%75%50%25%
Flow rates of each load
100%
75%
50%
25%
ΔP
ΔP
: Flow control valveC
Design guide for DVM Chiller
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2. Basic configurations
2-3 Water piping
2) Reverse return piping
If the pipe length between supply and return is the same, it has approximately the same friction
loss, which will produce approximately the same flow rate.
※ Although reverse return system is closer to self-balancing than direct return systems,
make sure each load is similar to balance water flow
Pump
Modular Chillers
(installed in parallel)
Fan Coil Units (installed in parallel)
Profile of Pressure Drop between inlet and outlet
Equal ΔP
Equal ΔP
Design guide for DVM Chiller
16
3. Water piping elements
▶ When designing a water piping system, the following should be considered :
• Water must be supplied to the required locations according to the needs of
each DVM Chiller.
• Head and friction losses should be kept minimum.
• Water velocity should be properly controlled to avoid water flow noise,
pipe vibration, and pipe expansion/contraction issues due to temperature differences.
• Attention should be paid to water management :
Impact of the water quality, corrosion prevention, freeze prevention etc.
• Proper arrangements should be provided for easy service and maintenance.
✓ Process
Pipe design – Direct or reverse return
Pipe route design – Minimization of pipe length
Flow rate calculation
Select pipe size
Select other parts
Calculation total head loss
Select water pump
Head loss, friction loss calculation
Design guide for DVM Chiller
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3. Water piping elements
3-1 Water pipes
1) Constant water flow
a. Constant flow valve
The constant flow valve maintains a steady flow rate for the stable operation.
This constant water flow valve is required for each DVM Chiller
b. Reverse return piping
If the pipe length between supply and return is the same,
it has approximately the same friction loss, which it makes the same flow rate.
C C C C
C
: Constant flow valve
Design guide for DVM Chiller
18
3. Water piping elements
3-1 Water pipes
2) Friction losses
In order to force a fluid through a pipe, pressure is required to overcome the viscous
friction forces. Friction loss occurs when water flow through a pipe.
✓ Note
The Darcy equation is the basis of all fluid flow equations and relates the pipe pressure drop
required to overcome the fluid viscous friction forces : ∂P = ( ρ * f * l * v² ) / ( 2 * d )
Where : ∂P = friction losses (Pa)
ρ = fluid density (kg/m³)
f = friction factor, depending on the roughness of the internal surface of the pipe
l = pipe length (m)
v = fluid velocity (m/s)
d = internal pipe diameter (m)
Most air conditioning systems use steel pipe or copper tubing .
Based on the Darcy equation, the pipe friction / flow tables are made.
Design guide for DVM Chiller
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3. Water piping elements
3-1 Water pipes
2) Friction losses
✓ Example (By Hazen-Williams Equation chart)
Design guide for DVM Chiller
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3. Water piping elements
3-1 Water pipes
3) Water velocity
The recommended water velocity through the piping is depending on two conditions :
• Pipe diameter
• Effect of erosion
▶ Pipe selection guide
Velocity Reliability
High Erosion accelerating, vibration and noise
LowDamaging wear and tear of pipes and fittings
Laminar flow reduces the chiller efficiency
* Design water velocity must be decided by the design engineer as erosion is a function of time
Pipe diameter
[inch] *Velocity range [ft/s]
5 or more 6.9 ~ 8.9
2~4 3.9 ~ 6.9
About 1 2.0 ~ 3.9
Running time (hr/year) Velocity(ft/s)
1,500 9.8
2,000 9.5
3,000 9.0
4,000 8.0
6,000 7.0
8,000 5.9
[ Recommended velocity range ]
[ Max allowable velocity to minimize erosion ]
* 1 year = 8,760 hr
Design guide for DVM Chiller
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3. Water piping elements
3-1 Water pipes
4) Example of sizing water pipes :
* Condition
- Type : Stainless steel pipe, Water flow : 200 l/min, Friction loss : less than 1.2 kPa
✓ Case #1 → Pipe size : 50 A, Velocity : 1.99 m/s, Friction loss : 1.05 kPa
✓ Case #2 → Pipe size : 60 A, Velocity : 1.28 m/s, Friction loss : 0.36 kPa
Flo
w r
ate
Friction loss
40 mm
high friction loss
(2.04 kPa/m)
75 mm
low velocity
(0.79 m/s)
(Lower than 0.4 kPa → Not efficiency)
Design guide for DVM Chiller
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3. Water piping elements
3-1 Water pipes
4) Example of sizing water pipes :
* Example (By Hazen-Williams Equation chart)
Flow
rate
Friction loss
Model 15HP
Water Flow 120 LPM
Diameter 40 A
Velocity 1.35 m/s
Friction loss 0.58 kPa/m
Model 20HP
Water Flow 160 LPM
Diameter 40 A
Velocity 1.82m/s
Friction loss 0.95 kPa/m
Model 25HP
Water Flow 200 LPM
Diameter 50 A
Velocity 1.99m/s
Friction loss 1.05 kPa/m
Design guide for DVM Chiller
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3. Water piping elements
3-2 Pumps
✓ Water pump selection
▶ 3 Factors for pump selection
1) Flow rate, 2) Total Head, 3) Power
1) Flow rate
Sum of required flow rate of each DVM Chiller
2) Total Head
H_t = H_a + H_p + H_f + H_u
H_a : Head pressure by level difference ( H_a value is 0 in closed loop as no level difference )
H_p : Friction loss by straight pipes
H_f : Equivalent length of friction loss by fittings
H_u : Friction loss from the condenser / evaporator in the units ( PHE of DVM Chiller)
H_a
Actual head
of suction
Actual head of
Delivery
H_a
Actual head
of suction
Actual head
of Delivery H_a
Water head
Actual head
of Delivery
Design guide for DVM Chiller
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3. Water piping elements
3-2 Pumps
✓ Water pump selection
▶ Equivalent length of friction loss by fitting [ft]
**Above chart is for reference only**
▶ Resistance of valves and fittings to flow of fluids
Pipe size ¾” 1” 1.25” 1.5” 2” 2.5” 3” 4”
Elbow (Long Radius) 2.3 2.7 3.2 3.4 3.6 3.6 4.0 4.6
Tee (line flow) 2.4 3.2 4.6 5.6 7.7 9.3 12 17
Tee (branch flow) 5.3 6.6 8.7 9.9 12 13 17 21
Globe valve 24 29 37 42 54 62 79 110
Design guide for DVM Chiller
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3. Water piping elements
3-2 Pumps
✓ Water pump selection
3) Power
Motor power calculation : This value will be used to select motor of water pump
Power[kW] = q x ρ x g x h / (3.6 x 10^6) / η
q = Flow rate (m3/h)
ρ = Density of fluid (kg/m3), * 1,000 for water
g = Gravity (9.81 m/s2)
h = Differential head (m)
η = Pump efficiency
Design guide for DVM Chiller
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3. Water piping elements
3-2 Pumps
✓ Water pump selection
▶ Example
DVM Chiller 15 Ton
FCU 24k Btu/h * 4 EA Supply Return
Required flow rate : 120 l/min
Pressure loss
PHE of DVM Chiller : 60 kPa
FCU : 25 kPa
Flow rate : 120 l/min
Length : 25 m
Pipe diameter : 40 A
Velocity : 1.35 m/s
Friction loss : 59 mmAq/m
Flow rate : 120 l/min
Length : 20 m
Pipe diameter : 40 A
Velocity : 1.35 m/s
Friction loss : 59 mmAq/m
Pump
Efficiency : 60%
DVM Chiller
FCU
32.8 feet
Elbow : 4 ea
T-connection straight through : 1 ea
Globe valve : 1 ea
- Flow rate : 120 l/min = 7.2m3/hr
- Total head pressure(H_t) = 0 + 26.0 + 12.8 + 85.0 = 123.8 kPa (12,6 mAq)
* H_a : 0, * H_p : (25+20) x 59 = 2,655 mmAq = 26.0 kPa,
* H_f : (1.3x4)x59 +( 0.9x1)x59+(16x1)x59 = 1,304 mmAq = 12.8 kPa, * H_u : 60 + 25 = 85.0 kPa
→ Refer to the table about equivalent length of friction loss by fitting
- Power = 5.76 x 1,000 x 9.81 x 12.6 / (3.6 x 10^6) / 0.6 = 0.33 kW
[ Pump catalogue ]
Design guide for DVM Chiller
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3. Water piping elements
3-2 Pumps
✓ Water pump selection
▶ Use selection software of the pump manufacturer
- Input flow rate & Head pressure
* Reference site : www.grundfos.com
Design guide for DVM Chiller
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3. Water piping elements
3-3 Expansion tank (vessel)
The purpose of the expansion tank is to maintain system pressure by allowing the water
to expand when the water temperature increases in order to prevent pipe and equipment
damage.
The tank is partially filled with air, whose compressibility cushions shock caused by
water hammer and absorbs excess water pressure caused by thermal expansion.
An expansion tank is required in a closed system.
In an open system, the reservoir acts as the expansion tank.
The expansion tank can be of the open or closed type.
The open expansion tank (reservoir) is located at the suction side of the pump,
above the highest point in the system.
At this location, the tank provides atmospheric pressure equal to or higher than
the pump suction, preventing air from leaking into the system.
The closed expansion tank is used in small systems and is designed larger than open
expansion tanks. The tank is located at the suction side of the pump.
▶ Expansion tank (vessel) location
Pump off
PE
PExpansion tank
14.5 psi 14.5 psi
Pump on
PE
P
0 psi 14.5 psi
✓ It may occur cavitation
Pump off
PE
P
Pump on
PE
P
✓ It can prevent cavitation
14.5 psi 14.5 psi
14.5 psi 29 psi
Design guide for DVM Chiller
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3. Water piping elements
3-3 Expansion tank (vessel)
▶ Expansion tank (vessel) sizing
✓ Open expansion tank
→ In the case of open expansion tanks, corrosion prevention is required.
- Size(ℓ) = Vw x (v_high - v_low) x α
* Vw(ℓ) : Total water amount in the system
* v_high(ℓ/kg) : water specific volume @ highest water temp
* v_low(ℓ/kg) : water specific volume @ lowest water temp
* α : Safety factor
✓ Closed expansion tank
- Size(ℓ) = Vw x (v_high - v_low) / [(Pa / P0) – (Pa / P1)] x α
* Vw(ℓ) : Total water amount in the system
* v_high(ℓ/kg) : water specific volume @ highest water temp
* v_low(ℓ/kg) : water specific volume @ lowest water temp
* Pa(kgf/cm2) : Atmospheric pressure – 1.03
* P0(kgf/cm2) : System initial pressure @ cold pressure
* P1(kgf/cm2) : System operating pressure @ hot pressure
* α : Safety factor
Design guide for DVM Chiller
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4. Maintenance
4-1 Water pipe installation
✓ Example of water pipe installation
No. Name No. Name
01 Drain pipe 07 Valve
02 Flange 08 Air vent valve
03 Strainer 09 Check valve
04 Drain valve 10 Pump
05 Temperature gauge 11 Flexible joint
06 Pressure gauge 12 Expansion tank
▶ If the hydronic pipe is not managed periodically, it may affect the operation and may cause
noise, maintenance, and service difficulty.
▶ Hydronic pipe should be insulated per local code. If water piping is not insulated, or poorly
installed, there may be heat loss, and may cause frozen damage during cold weather.
▶ When using indoor units such as two or more fan coil units, make sure each unit is installed
with valving to maintain proper balanced water flow.
▶ Install the expansion tank that can absorb expansion and contraction of water due to
temperature change. Location of tank based on type used, open or closed.
▶ Install automatic air vents at high points in the piping to aid in the removal of air
▶ When using expansion tanks or automatic air vents, give 1/250 slant to horizontal pipes.
Design guide for DVM Chiller
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4-1 Water pipe installation
▶ Install drain valves at low points of the loop. If the system is large, install drain valves for each
of the main pipes so that draining is easier for maintenance.
▶ Water pump should be installed on the inlet side of DVM Chiller heat exchanger.
A stainless steel strainer (50 Mesh or more) is mandatory at heat exchanger inlet.
▶ Use flexible joint at inlet/outlet of heat DVM Chiller heat exchanger connections pipe to
aid in absorption of vibration and stress.
▶ Install temperature gauge and pressure gauge at inlet/outlet of DVM Chiller heat exchanger
connections for monitoring, maintenance, and service.
▶ Connect water pipes to the product by cut and groove coupling. Install the pipe and the
product in a manner it can be easily disconnected if needed for service. Install valves at
inlet/outlet of pipes, drain valve at inlet, and air purge valve at outlet of water pipe.
▶ Maintain the water volume as listed in technical documents. If the volume is too low,
compressor may short cycle with light load on the system.
Such operation may result in shortening the life of the product and/or product malfunction due
to repetition of compressor operation. Be aware of the volume, if water temperature and
capacity control is done by a bypass system.
▶ There is a possibility of scale generated on plate type heat exchanger, periodical chemical
cleaning may be necessary to remove scale. Install chemical input between valve and the
product.
▶ If the product is stopped for a long periods of time during winter, or stops operation for
unoccupied times, take appropriate countermeasures (water drain, circulating pump operation,
heater, etc.) to prevent freezing in cold regions where outdoor temperature falls below 32 .
When water in the system freezes, it will cause damage to the plate type heat exchanger and
therefore preventive measure must be taken. Example: Pumping heat exchanger with glycol is
a preventative measure.
4. Maintenance
Design guide for DVM Chiller
32
4-1 Water pipe installation
▶ Water maintenance is standard for chilled/heating water with circulating water.
Using untreated water may cause corrosion and performance issues.
Also, avoid autofill water systems that do not have chemical treatment.
▶ Water storage must be used within the range listed in installation manuals. 50 ~ 200 % of
rated water storage can be used, but using rated water storage is recommended.
- If water volume is low, it may cause performance decrease due to scale accumulation,
thermal protection operation to prevent freezing, and potential gas leakage.
- If water storage is over, it may cause corrosion.
▶ Be aware of any cavitation when checking flow rate of water system, installation of
expansion tank, and air purging placed in the middle of the loop.
▶ In case of semi-closed chilled/heating water system with thermal storage, exchange water
(once every 1 ~ 2 years), clean and maintain thermal storage periodically. New concrete
thermal storage may elute foreign substances, so pH of thermal storage water may be affected.
If pH is over the standard, copper may corrode faster.
Exchange the water periodically in this situation. Also, over time if thermal storage is used
water leakage may occur due to cracks.
- In case of using sea water or contaminated underground water, corrosion may occur by slime
generated by microbes or calcium carbonate.
▶ Installation of chemical pot feeder is recommended for ease of water treatment maintenance.
4. Maintenance
Design guide for DVM Chiller
33
4-2 Water quality
▶ If chilled/heating water is not maintained by the following standard, corrosion and scale
accumulation may occur. It may decrease the performance of heat exchange, and may also
cause product malfunction due to heat exchanger damage by freezing. Extra care is
necessary, and water should be maintained to keep the water within the standards.
Item
Chilled water system
Heating water system
effect
Low level medium temp. heating gauge
Circulation water
(below 68 )Supply water
Circulation water
(68 ~140 )Supply water Corrosion
Forming
scale
Basic
item
pH (77 ) 6.8~8.0 6.8~8.0 7.0~8.0 7.0~8.0 O O
Electric conductivity
(mS/m, 77 )
{μS/cm, 77 }
Below 40
{Below 400}
Below 30
{Below 300}
Below 30
{Below 300}
Below 30
{Below 300}
O O
Chloride ion (mgCl-/ℓ) Below 50 Below 50 Below 50 Below 50 O
Sulfate ion (mgSO42-/ℓ) Below 50 Below 50 Below 50 Below 50 O
Acid consumption
(pH4.8, mgCaCO3/ℓ) Below 50 Below 50 Below 50 Below 50 O
Full hardness (mgCaCO3/ℓ) Below 70 Below 70 Below 70 Below 70 O
Calcium hardness
(mgCaCO3/ℓ)Below 50 Below 50 Below 50 Below 50 O
Ion-like silica (mgSiO2/ℓ) Below 30 Below 30 Below 30 Below 30 O
Reference
item
Iron (mgFe/ℓ) Below 1.0 Below 0.3 Below 1.0 Below 0.3 O
Copper (mgCu/ℓ) Below 1.0 Below 0.1 Below 1.0 Below 0.1 O
Sulfide ion (mgS2-/ℓ) Not detected Not detected Not detected Not detected O
Ammonium ion (mgNH4+/ℓ) Below 1.0 Below 0.1 Below 0.3 Below 0.1 O
Chlorine residual (mgCl/ℓ) Below 0.3 Below 0.3 Below 0.25 Below 0.3 O
Free carbon (mgCO2/ℓ) Below 4.0 Below 4.0 Below 0.4 Below 4.0 O
4. Maintenance
Design guide for DVM Chiller
34
4-3 Freeze prevention of water pipe (If not using Anti-freeze)
▶ When outdoor temperature is low or during winter months, water in pump and piping may
freeze and may cause damage to the product and the piping system. Insulate piping and all
accessories to help prevent freezing. Use of heat trace is recommended. In low ambient
conditions operate the pump while the product is off or if possible, drain the system.
✓ Stopping during winter
▶ Do not cut-off the power supply.
- This may result in water leakage or pipe damage because pump will not operate to prevent
freezing. Do not cut-off the power supply for the pump.
▶ Stop the operation with water pipe valve opened.
- Stop the operation with valve opened to make water circulate when the pump operates.
If the water does not circulate, it may freeze and cause product malfunction.
✓ Stopping for an extended time
▶ Drain water from water pipes and water side heat exchanger.
- Open drain valves on water pipe system and drain plug in DVM CHILLER when draining
water.
- Product may be damaged if water freezes inside the piping and water side of the heat
exchanger when temperatures are below 32°F.
▶ Cut-off the power supply after draining water.
- Pump may operate for protection even there is no water when power is supplied
and it may cause pump malfunction.
4. Maintenance
Design guide for DVM Chiller
35
4-4 Chilled water management
▶ If the chilled water storage exceeds optimal range,
stop the operation until cause is taken care before re-start the operation.
* Range: 50 ~ 200 % of rated flow rate
4. Maintenance
Item
Water flow rate working range (GPM)
Rated condition Working range
Model AG010* AG015* AG010* AG015*
Cooling / Heating 24 33.6 15.8 ~ 48 16.8 ~ 67.2
Design guide for DVM Chiller
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4-4 Chilled water management
▶ Water temperature range
- Operate the product within the following range.
For product protection, compressor operation may be limited.
✓ When using in brine condition in cooling mode, maintain concentration of brine properly.
The product should be set in low temperature usage.
* To use low temperature function,
hydro controller option No. 34 and Seg 23 of advanced option 05 = "E" should be all set.
* Anti-freeze standard data
4. Maintenance
ClassificationRated condition
(Inlet / Outlet)
Range(Water Outlet)
Water Brine
Cooling 53.6 / 44.6 41 ~ 77 14 ~ 77
Heating 104 / 113 77 ~ 131
Water outlet temperature, 14 ~ 23 23~32 32~ 35.6 35.6 ~ 41 41 ~ 68
Ethylene glycol, % 40 30 20 10 0
Propylene glycol, % 40 35 25 15 0
Minimum water outlet temperature, 14 23 32 35.6 41
Design guide for DVM Chiller
37
4-4 Chilled water management
▶ Minimum water storage
- If the length of water pipe is too short, water volume within the system becomes lower and
ON/OFF operation of the compressor occurs more often. For stable operation, maintain
certain water volume by applying header or Buffer tank.
- If total water volume is under the minimum volume, install another tank to retain
more water volume.
✓ Total water volume in the system
= water volume within the water pipe + water volume in DVM CHILLER + water volume in
AHU (or fan coil)
✓ Minimum capacity of buffer tank
= Minimum water volume - water volume within the water pipe system
4. Maintenance
Model name Minimum water volume (gal)
AG010KSV Series 72
AG015KSV Series 100.8
Design guide for DVM Chiller
38
5. External contact connection
▶ Configuration of terminal block
DVM Chiller
Hydro control box
A-T/B B-T/B
C-T/B
※ T/B : Terminal Block
5-1 A-Terminal block
Cooling/Heating
display
Operation
display
Warning
display
Defrost operation
display
Pump operation
display
Comp operation
display
Pump operation
Freeze protection
display
* A-T/B : Output contact
* Output contact can be connected
neutral contact and open/short only
* Apply dry contact(No current)
- Purpose is to check the status of product in control room.
Design guide for DVM Chiller
39
5. External contact connection
No. Name Function Contact short Contact open signal
A-T/B
1-2 Cooling/Heating displayDisplay when operating
in heating modeHeat Cool
Dry
contact
3-4 Operation display Display when operation ON Operate Stop
5-6 Warning display Display when error occurs Error occurred No error
7-8 Defrost operation display Display when in defrost Defrost On Defrost Off
9-10 Pump operation display Display when pump is operating Pump On Pump Off
11-12 Comp operation displayDisplay when compressor is
operatingCompressor On Compressor Off
13-14 Pump operation Signal of pump operation Pump signal On Pump signal Off
15-16 Freeze protection displayDisplay when in freeze
protection
Pump On for
Freeze protectionOthers
5-2 B-Terminal block
Pump interlock
Operation
On/Off
Operation
On/Off
Operation mode Standard for Hot water
(Cool storage) control
Hot water(Cool storage)
mode
Hot water(Cool storage)
Thermostat signal* B-T/B : Input contact
* Input contact can be connected
neutral contact and open/short only
* Apply dry contact(No current)
Design guide for DVM Chiller
40
5. External contact connection
① Pump interlock (Mandatory)
- Prevents operating DVM Chiller without pump operation.
If DVM Chiller operates without pump operation, it may be cause product damage.
- Works by contact signal between DVM Chiller and pump.
- After checking for pump operation, the product operates.(Apply interlock system)
If pump does not operate, the product will not operate.
- The power of pump should be supplied separately.
→ DVM Chiller provides only a dry contact for reliability of product.
Product can be damaged because of problem of a pump which is installed
in field.
✓ Hydro option setting
- Delay time of pump operation signal feedback is determined in the No. 13 of hydro
option setting.
Operation on
signal to pumpFeedback signal from
the pump for delay
time?
Operation OFF
Error display
*E918
No
Yes DVM Chiller
Operation On
*E911 : Dose not detect the signal of flow switch
E913 : Six times detection of E911
(Operation is not possible)
*E918 : No feedback interlock signal of pump operation
Detect the water
flow for 10sec?
Yes
Operation OFF
Error display
*E911/E913
No
Option No. Option Item Option value Factory default Definition Setting unit
13Delay time of pump
operation signal feedback10~240 30 Second unit Main unit of module
** Pump interlock may be proven by means of flow switch or
control interlock.
Design guide for DVM Chiller
41
5. External contact connection
① Pump interlock – Wiring connection
No. Function Contact short Contact open Setting unit
A-T/B 13-14 Pump operation Pump signal ON Pump signal OFF Each unit
B-T/B 7-8 Pump interlock Pump on Pump off Each unit
PumpRelay
(Field supplied)
Power supplyVoltage
supply
Input signal
Relay
※ Caution
* Some voltage is necessary to activate relay
* Input cannot be connected by jumper
Dry Contact orflow proving
device
Design guide for DVM Chiller
42
5. External contact connection
② Operation contact signal
- It is possible to control operation by contact signal.
You can select the operation method by either Module control/DMS or external contact.
- Hydro option setting is required for this function. (Option No. 1 / Option No. 28)
✓ Hydro option setting
- The input signal pattern is determined in the No. 28 of hydro option setting at first.
- To use this external contact, the input method of operation on/off in hydro setting needs
to be set to 1.
No
Yes DVM Chiller
Operation ON
(Contact : Short)
Operation OFF
(Contact : Open)
Is there input signal?(B-T/B, 13/14)
Yes
Heating
operation
start
(Contact :
Short)
Cooling
operation start
(Contact : Open)
Is there input signal?(B-T/B, 9/10)
Yes DVM Chiller
Operation ON
(Contact : Short)
Is there input signal?(B-T/B, 13/14)
Yes
Cooling
operation start
(Contact : Open)
Is there input signal?(B-T/B, 9/10)
Value of hydro option No. 28?
0
1
Is there input signal?(B-T/B, 11/12)
Yes DVM Chiller
Operation OFF
(Contact : Short)
No
No
No
No
Heating
operation
start
(Contact :
Short)
Option No. Option ItemOption
value
Factory
defaultOption Definition
Setting
unit
28Signal pattern of operation ON/OFF by
external contact 0/1 0
0 Usual input signal Main unit
of group1 Instant input signal
Option No. Option ItemOption
value
Factory
defaultOption Definition
Setting
unit
1 Input method of operation ON/OFF 0/1 00 Module control/DMS Main unit
of group1 External contact
Design guide for DVM Chiller
43
5. External contact connection
② Operation contact signal – Wiring connection
Operation ON
contact signal
Operation mode
contact signal
Input signal
DDC
Dry contact
(Field supplied)
※ External controller
(DDC : Direct Digital Control)
DDC
Dry contact
DDC
Dry contact
Input signalInput signal(Field supplied)
No. Function Contact short Contact open Signal type Setting unit
B-T/B
9-10Operation on/off Refer to the below
Usual input
or
Instant input signal Main unit of group11-12
13-14 Operation mode Heat Cool Usual input
Signal type No. 9~10 No. 11~12 Signal type
Short(Operation on)
Open(Operation off)-
Usual input signal
(Open/short)
Short(Operation on) Short(Operation off)Instant input signal
(Pulse input)
Design guide for DVM Chiller
44
5. External contact connection
③ Hot water / Cool storage
- Able to store the thermal energy in water tank for later use.
✓ Hydro option setting
- To use this external contact, the input method of operation mode in hydro setting have
to be set to 1.
✓ Module control setting
- Service mode setting of Module control is required for this function.
No
Yes Cool storage
(Hot water) operation
(Contact : Short)
DVM Chiller
Operation ON
Cooling(Heating)
operation
(Contact : Open)
Is there input signal?(B-T/B, 19/20)
Yes
DVM Chiller
Thermo on
(Contact : Short)
DVM Chiller
Thermo off
(Contact : Open)
Is there input signal?(B-T/B, 15/16)
No- Cool storage operation B-T/B 13/14 : open
- Hot water signal: B-T/B 13/14 : short
B-T/B 9-10 : on
Option No. Option ItemOption
value
Factory
defaultOption Definition
Setting
unit
3Input method of operation mode
(Cool/Heat, Cool storage/Hot water)0/1 0
0 Module control/DMS Main unit
of group1 External contact
Main
menu
Sub
menuFunction
Option
value
Factory
defaultOption Definition Save
9
4 Use Cool storage mode 0/1 -0 Disable
Save at
DVM
Chiller
1 Enable
5 Use Hot water mode 0/1 -0 Disable
1 Enable
Design guide for DVM Chiller
45
5. External contact connection
③ Hot water / Cool storage – Wiring connection
Input signal
DDC
Dry contact
※ External controller(DDC : Direct Digital Control)
DDC
Dry contact
DDC
Dry contact
Input signalInput signal
(Field supplied)
No. Function Contact short Contact open Signal type Setting unit
B-T/B
15-16Hot water(Cool storage)
mode
Cool storage or
Hot waterCool or Heat Usual input
Main unit of group17-18Hot water(Cool storage)
control method
Control by
set temperature
Control by
thermostatUsual input
19-20Hot water(Cool storage)
Thermostat signalThermo on Thermo off Usual input
Design guide for DVM Chiller
46
5. External contact connection
5-3 C-Terminal block
* C-T/B : Input contact
* Input contact can be connected
neutral contact and open/short only
* Apply dry contact(No current)
except C-T/B No. 17~20
Silent mode
function
Demand
function
Forced
fan
function
Unusual
condition
reset
Set temperature /
Room temperature
Sensor(4~20mA)
Water law function
External water outlet
Temperature
(4~20mA)
※ T/B : Terminal Block
① Silent mode function
- Reduces the noise of outdoor unit in night time during low demand.
- When silent mode function is enabled by module control, only cooling mode is possible.
- If silent mode is enabled by external contact, both Cooling and Heating mode are possible
by signal of external contact.
Sensor Type: PT100
Design guide for DVM Chiller
47
5. External contact connection
✓ By module control
DVM Chiller
Operation ON
After 6hr from
highest ambient
temp?
Normal
operation
No
Silent mode operation
(Only Cooling mode)
YesHydro option
value of No. 12?
1~3
0
After 12hr from
mode entry or
mode off?
YesNo
Normal
operation
✓ By external contact
DVM Chiller
Operation ON
Yes Hydro option
value of No. 12?1~3
0
Normal
operation
(Contact : Open)
No
Is there
input signal?
(C-T/B, 1/2)
Normal
operation
Silent operation
(Cooling or Heating mode)
✓ Hydro option setting
- Silent mode function level is determined in the No. 12 of hydro option setting at first.
- To use external contact, the input method of silent mode function in hydro setting have
to be set to 1.
Option No. Option ItemOption
value
Factory
defaultOption Definition
Setting
unit
12 Silent mode function level 0~3 1
0 Default(100%)
Main unit
of module
1 Level 1
2 Level 2
3 Level 3
Option No. Option ItemOption
value
Factory
defaultOption Definition
Setting
unit
6 Input method of silent mode function 0/1 00 Module control/DMS Main unit
of group1 External contact
Design guide for DVM Chiller
48
5. External contact connection
① Silent mode function – Wiring connection
Input signal
DDC
Dry contact
(Field supplied)
※ External controller
(DDC : Direct Digital Control)
No. Function Contact short Contact open Signal type Setting unit
C-T/B 1-2 Silent mode function On Off Usual input Main unit of group
Design guide for DVM Chiller
49
5. External contact connection
② Demand function
- Used to limit power consumption of the product to manage efficiency.
- Hydro option setting is required for this function. (Option No. 5 : Demand control level)
→ It can be set as no limit or range of 50 ~ 100%. (Interval : 5%)
- If it is enabled by external contact, Hydro option setting is required for this function
(Option No. 4 : Input method of Demand control)
DVM Chiller
Operation ON
Demand control On by
Module control or DMS?
Use of
external contact
Is there input signal?(C-T/B, 3/4)
Normal
operation
Normal
operation
(Contact : Open)
Demand control
operation
Demand control Off by
Module control or DMS ?
Normal
operation
Yes
No
Yes
No
No
Demand control
operation
Yes
Design guide for DVM Chiller
50
5. External contact connection
✓ Hydro option setting
- Demand control level is determined in the No. 5 of hydro option setting at first.
- To use external contact, the input method of Demand control in hydro setting have
to be set to 1.
Option No. Option ItemOption
value
Factory
defaultOption Definition
Setting
unit
5 Demand control level 0~11 3
0 Default(100%)
Main unit
of module
1 95%
2 90%
3 85%
4 80%
5 75%
6 70%
7 65%
8 60%
9 55%
10 50%
11 Not applied(No Limit)
Option No. Option ItemOption
value
Factory
defaultOption Definition
Setting
unit
4 Input method of Demand control 0/1 00 Module control/DMS Main unit
of group1 External contact
Design guide for DVM Chiller
51
5. External contact connection
② Demand function – Wiring connection
Input signal
DDC
Dry contact
(Field supplied)
※ External controller
(DDC : Direct Digital Control)
No. Function Contact short Contact open Signal type Setting unit
C-T/B 3-4 Demand function On Off Usual input Main unit of group
Design guide for DVM Chiller
52
5. External contact connection
③Water law function
- Used to optimize the operation state of product depending on ambient conditions to
save power cost.
- Leaving water temperature of product is set automatically by ambient or room temperature.
- If it is enabled by external contact, Hydro option setting is required for this function.
(Option No. 8 : Input method of Water law function)
- Water law control method is determined by No. 15 of hydro option setting.
(Based on ambient temperature or room temperature)
- In case of using water law by room temperature,
The room temperature sensor must be installed connected at No.17/18 of C-T/B.
Ambient temp.[°F]
Lea
vin
g w
ate
r te
mp.[°F
]
AirCool1 or AirHeat1
Tcool1 or Theat1
Tcool2 or Theat2
[Cooling / Heating Mode]
AirCool2 or AirHeat2
Room temp.[°F]
Lea
vin
g w
ate
r te
mp. °F
]
RoomCool1 or RoomHeat1
Tcool1 or Theat1
Tcool2 or Theat2
[Cooling / Heating Mode]
RoomCool2 or RoomHeat2
Design guide for DVM Chiller
53
5. External contact connection
✓ Hydro option setting
- Water law control standard is determined in the No. 15 of hydro option setting.
- To use external contact, the input method of Water law in hydro setting have to be set to 1.
- The value of parameters are determined by No. 16~27 of hydro option setting.
Option No. Option ItemOption
value
Factory
defaultOption Definition
Setting
unit
15 Water law control standard 0/1 00 Ambient temperature Main unit
of group1 Room temperature
Option No. Option ItemOption
value
Factory
defaultOption Definition
Setting
unit
8 Input method of Water law function 0/1 00 Module control/DMS Main unit
of group1 External contact
Option No. Option ItemOption
value
Factory
defaultDefinition
Setting
unit
16 AirCool1(For Water law) 0~20 10 Standard1 outdoor temperature for cooling
Main unit
of group
17 AirCool2(For Water law) 30~40 35 Standard2 outdoor temperature for cooling
18 RoomCool1(For Water law) 15~24 20 Standard1 room temperature for cooling
19 RoomCool2(For Water law) 25~35 30 Standard2 room temperature for cooling
20 Tcool1(For Water law) -10~25 15 Standard1 set temperature for cooling
21 Tcool2(For Water law) -10~25 7 Standard1 set temperature for cooling
22 AirHeat1(For Water law) -20~5 -10 Standard1 outdoor temperature for heating
23 AirHeat2(For Water law) 10~20 15 Standard2 outdoor temperature for heating
24 RoomHeat1(For Water law) 15~24 20 Standard1 room temperature for heating
25 RoomHeat2(For Water law) 25~35 30 Standard2 room temperature for heating
26 Theat1(For Water law) 35~55 45 Standard1 set temperature for heating
27 Theat2(For Water law) 35~55 35 Standard1 set temperature for heating
** All values are in ºC
Design guide for DVM Chiller
54
5. External contact connection
③Water law function – Wiring connection
(Field supplied)
※ External controller(DDC : Direct Digital Control)
DDC
Dry contact
Input signal
(Field supplied) Sensor SMPS 24V
No. Function Contact short Contact open Signal type Setting unit
C-T/B
11-12 Water law Water law controlWater outlet set
Temp. controlUsual input Main unit of group
17-18Set temp. input /
Room temp. sensor4 ~ 20mA Current input Main unit of group
※ Correlation of both room temp. sensor and current
(Room temperature sensor for water law(℃) = 6.25 x Current(mA) – 75)
Current(mA) 4 6 8 10 12 14 16 18 20
Temperature(℃) -50.0 -37.5 -25.0 -12.5 0 12.5 25.0 37.5 50.0
Temperature(°F) -58 -35.5 -13 -9.5 32 54.5 77 99.5 122
Design guide for DVM Chiller
55
5. External contact connection
④ External water temperature sensor
- External water temperature sensor is used for control instead of product’s water outlet
temperature sensor
- Hydro option setting is required for this function.
(Option No. 14 : External water outlet temperature sensor)
- The external water temperature sensor should be installed in the common building return
header. This will allow the mixed temperature of water to be accurately read.
- It must be connected at No. 19/20 of C-T/B
✓ Hydro option setting
- It has to be set to 1, when an external water temp. sensor is used instead of individual
unit’s water outlet temp. sensor.
External water
temp. sensor use?
Water outlet temp.
sensor control of
each product
No
Yes YesOperation pattern of DVM
Chiller is not standard
control?
External water temp.
sensor control
Water outlet temp.
sensor control of
each product
No
Option No. Option ItemOption
value
Factory
defaultOption Definition
Setting
unit
14 External water outlet temperature sensor 0/1 00 Disuse Main unit
of group1 Use
Design guide for DVM Chiller
56
5. External contact connection
④ External water temperature sensor – Wiring connection
(Field supplied)
Sensor SMPS 24V
No. Function Contact short Contact open Signal type Setting unit
C-T/B 19-20 External water outlet temperature 4~20mA Current input Main unit of group
※ Correlation of both external water outlet temp. sensor and current
(The value of water outlet set temp.(℃) = 6.25 x Current(mA) – 55)
Current(mA) 4 6 8 10 12 14 16 18 20
Temperature(℃) -30 -17.5 -5 7.5 20 32.5 45 57.5 70
Temperature(°F) -22 0.5 23 45.5 68 90.5 113 135.5 158
Design guide for DVM Chiller
57
6. Check List
6-1 Module or group operation
▶ Module/group operation is to combine multiple units in modules or groups of a single water
pipe system and to operate depending on the working condition.
▶ A single module control can control a maximum of 16 DVM CHILLERs (0 ~ 15).
- DVM CHILLER can have a maximum of 8 modules (1 ~ 8) and 4 groups (1 ~4).
- A maximum of 8 units can be connected to a module, and a maximum of 16 units (module)
can be connected to a group.
▶ Depending on the working condition below, set modules or groups.
- A module or a group must be connected to a single water pipe.
- When modules are controlled by a group, the modules cannot operate themselves and
the display will not show the modules during the module operation.
▶ You can select an operation mode, a pattern operation (according to distribution method
of compressor capacity) and an applied operation by each module or group.
Design guide for DVM Chiller
58
6. Check List
6-2 Operation pattern for modules
- The default is Standard control. This is can be changed at Module Controller.
Contact a service center for further details.
- When the current water temperature reaches the set temperature, On/Off control will be
performed by each unit.
1) Standard control
- All units connected to each module start operating at the same time, and then they
control the water outlet temperature and the capacity of compressor separately.
※ Standard control is suited to the site that has always a high cooling and
heating load factor.
Design guide for DVM Chiller
59
6. Check List
6-2 Operation pattern for modules
2) Rotation control
- DVM CHILLER’s water outlet temperature is controlled according to the water outlet
temperature average value of all units which operates by pumps in a module. However,
if you set “Use” for an external water temperature sensor, it controls the water outlet
temperature according to a temperature value from the sensor.
- Only one unit with the highest priority operates, and if the unit has the full load, a unit
with the following priority will operate.
- The unit with the lowest priority operates at the minimum capacity, and if the water outlet
temperature reaches the set temperature, it performs On/Off control.
※ The rotation control is suited to the site that has small capacity at load side during starting
a DVM CHILLER and has a small fluctuation in momentary load.
Design guide for DVM Chiller
60
6. Check List
6-2 Operation pattern for modules
3) Efficiency control
- DVM CHILLER’s water outlet temperature is controlled according to the water outlet
temperature average value of all units which operates by pumps in a module. However,
if you set “Use” for an external water temperature sensor, it controls the water outlet
temperature according to a temperature value from the sensor.
- The unit with the highest priority operates, and if that unit operates with optimum
efficiency, a unit with the following priority will operate.
- When all units reach efficient operating condition, each unit operates at capacity between
efficient operating condition and the maximum capacity condition.
- When all units reach efficient operating condition and the water outlet temperature reaches
close to the set temperature, the unit with the lowest priority decreases compressor
operating capacity.
Design guide for DVM Chiller
61
6. Check List
6-2 Operation pattern for modules
3) Efficiency control
※ The efficiency control is suited to the site that has both an operating section with the
low load and a focused operating time.
When all units operate with the optimum efficiency, they control the pressure of their
compressors in a range between higher than *efficient Hz and lower than full load Hz
separately.
* Efficient Hz means the best efficient Hz of inverter.
Design guide for DVM Chiller
62
7. Product configuration
7-1 DVM Chiller configuration
1) Product dimension
1 23
4
5
70 2/3
66 3
/4
30 1/8
7 5/8
10.09 1/16
Anchor Bolt Anchor Bolt
31 5/834 7/8
10.0
30 5/8
65 3/16
No Part Name Specification
1 Water Connections 50 A Cut Groove
2 Power Hole (front) 6 1/3 in*6 3/16 in
3 Power Hole (side) Left Φ 2 in, Right Φ 1 ¾ in
4 Communication Hole (Front) Φ 1 3/8 in
5 Monitoring Window 7 in* 5 1/16 in
* Unit :inches
Design guide for DVM Chiller
63
7. Product configuration
7-1 DVM Chiller configuration
2) Part exploded view
3
9
11
7
8
7
8
5321
19
19
8
12
13
22
20
20
22 23
21
18 2517
14
15
6
16
4
20
26
10
No Part Name No Part Name No Part Name
1 Air Heat Exchanger 10 Fan Motor 19 Water Connection
2 Water Heat Exchanger 11 Oil Return Valve 20 Water Pressure Sensor
3 4way Valve 12 High Pressure Sensor 21 PHE EEV
4 Accumulator 13 Hot Gas Bypass Valve 22 Air Vent
5 EVI Bypass Valve 14 Low Pressure Sensor 23 Water Temp. Sensor
6 Oil Separator 15 Vapor Injection Valve 24 EVI EEV
7 Receiver Tank 16 High Pressure Switch 25 Sub Cooler
8 Scroll Compressor 17 Accum. Return Valve 26 Fusible Plug
9 Propeller Fan 18 Main EEV
Design guide for DVM Chiller
64
7. Product configuration
7-1 DVM Chiller configuration
2) Part exploded view
(Hydro parts)
[ AG010/015KSVA*H/AA ]
Design guide for DVM Chiller
65
7. Product configuration
7-2 Module controller (MCM-A00N, Mandatory)
1) Function
- A module controller controls DVM Chillers by each group or module.
2) Features
- DVM Chiller On/Off control (Module / Group)
- Operation mode, water outlet temperature setting
- Optional operation setting
- Module / Group setting
- Weekly / Holiday operation schedule setting
- Summer time (Daylight saving) support
- Back light screen
- User settings / Service mode support
- Forced fan function (Anti snow accumulation)