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A water spray system, that sprays water onto the air heat exchanger surface (evaporative condenser), is installed
on the chiller for all high EER USX EDGE model codes. Water is sprayed onto the heat exchanger when
operation start temperature and the compressor capacity is greater than preset values for these parameters.
Operation start/end temperature and operation start/end capacity can be adjusted. Use UP or DOWN of the unit
controller to select "C. dnSt" and then touch ENTER. Then the setting value of d-
□□
(where
□□
is DN code)
can be changed. The dimensional drawing of air heat exchanger spray, main specifications, and DN code list are
shown below.
*
Pumpless units exclude pumps and check valves
Dimensional drawing for high EER type
Air heat exchanger sprinkler specifications
Amount of water sprinkled (L/min)
13.6 (per module)
Supply water pressure (MPa)
0.2
Water temperature range (ºC)
10 to 30
Control system
When the outdoor air temperature is more than the operation start temperature and the compressor
capacity is more than the operation start capacity, water is sprinkled continuously.
When the outdoor air temperature is less than the operation end temperature or the compressor
capacity is less than the operation end capacity, the operation ends.
DN code list (HIF board in control box)
DN code
Functions
Description
Initial value Variable range
61
Evaporative condenser operation start
temperature [ºC]
Outside air temperature that triggers operation
30
20 to 45
62
Evaporative condenser operation end
temperature [ºC]
(differential from start temperature)
Operation ends if following value is less than stated value:
evaporative condenser operation start outside air temperature -
evaporative condenser operation end outside air temperature
2
1 to 10
63
Evaporative condenser operation start
capacity [%]
Compressor capacity when operation starts (Note)
75
0 to 100
64
Capacity when evaporative condenser
operation ends [%]
(Difference with start capacity)
Operation ends if following value is less than stated value:
evaporative condenser operation start compressor capacity -
evaporative condenser operation end compressor capacity
5
0 to 100
Note: This is the value when the compressor frequency at rated capacity is 100%.
High EER Type
No. NAME
JOINT
1 WATER
INLET 2-1/2"
FLANGE
2 WATER
OUTLET 2-1/2"
FLANGE
3 COIL DRAIN
PT1-1/2" EXTERNAL THREAD
4 AIR VENT VALVE
PT1/2" INTERNAL THREAD
5 STRAINER
CASING: Equivalent to FC250
6 CHECK VALVE
CASING: Equivalent to FC200
7 WATER PIPING
(INRET)
JIS10K FLANGE Equivalent to SUA304
PIPING Equivalent to SUA304
8 WATER PIPING
(OUTLET)
JIS10K FLANGE Equivalent to SUA304
PIPING Equivalent to SUA304
9 PUMP
CASING:
FC200
10 WATER HEAT
EXCHANGER
PLATE, JOINT Equivalent to SUA316
SOLDER PURE COPPER
11 HOUSING TYPE JOINT GASKET
*1
EPDM
12 WATER SUPPLY PORT FOR SPRAY PT1/2"
EXTERNAL
*1 DESCRIPTION OF WETTED PART
POWER SUPPLY
BOTTOM (
φ
80 KNOCK OUT PUNCH)
(MOUNTING HOLE PITCH)
POWER SUPPLY
BOTTOM (
φ
80 KNOCK OUT PUNCH)
EXTERNAL CONTROL
BOTTOM (
φ
35 KNOCK OUT PUNTCH)
DETAIL A
MOUNTING HOLE
(4-
φ
20)
(M
OUNT
IN
G HOL
E
P
IT
C
H)
BASE, SIDE
DRAIN
(BOTTOM-
φ
40) (Note. 4)
WATER SUPPLY PORT
FOR SPRAY
WATER PIPING
(OUTLET)
WATER INLET
WATER INLET
2-1/2" FLANGE: 4-
φ
19
3" FLANGE: 8-
φ
19
2-1/2" FLANGE: 4-
φ
19
3" FLANGE: 8-
φ
19
AIR VENT VALVE
STRAINER
(20Meshes/in.)
WATER PIPING
(INLET)
CHECK VALVE
COIL DRAIN
PUMP
DRAIN PLUG
CONTROL LINKAGE WIRING BETWEEN MODULES
HOUSING TYPE JOINT
EXTERNAL CONTROL
LIFTING HOLE
(4-
φ
25)
POWER SUPPLY
(
φ
80)
SERIAL PLATE
POWER LAMP, SWITCH
MODULE CONTROLLER
(INSTALLED IN ONLY ONE
MODULE)
(CENTRALIZED
CONTROLLER)
THERMAL INSLATION
(FIELD-SUPPLIED)
WATER HEAT EXCHANGER
