Installation
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9
IOM 1281-2 • CENTRIFUGAL WATER CHILLERS
Operating Limits
Figure 4: Operating/Standby Limits
Acceptable Temperatures (WDC, WCC)
1
R-513A
R-134a
Condition
Component
Description
Min Temp
°F (°C)
Max Temp
°F (°C)
Min Temp
°F (°C)
Max Temp
°F (°C)
Standby
Evaporator
Entering Fluid
35 (1.7)
86 (30)
35 (1.7)
90 (32.2)
Entering Fluid w/ Antifreeze
2
20 (-6.7)
86 (30)
20 (-6.7)
90 (32.2)
Equipment Room
Air w/ Water in Vessels & Oil Cooler
40 (4.4)
104 (40)
40 (4.4)
104 (40)
Air w/ no Water in Vessels & Oil Cooler
0 (-17.8)
0 (-17.8)
0 (-17.8)
113 (45)
Startup
Evaporator
Entering Fluid
38 (3.3)
100 (37.8)
38 (3.3)
100 (37.8)
Entering Fluid w/ Antifreeze
2
20 (-6.7)
100 (37.8)
20 (-6.7)
100 (37.8)
Condenser
Entering Fluid
35 (1.7)
110 (43.3)
35 (1.7)
111 (43.9)
Oil Cooler
Entering Fluid
35 (1.7)
80 (26.7)
35 (1.7)
80 (26.7)
Equipment Room
Air
40 (4.4)
104 (40)
40 (4.4)
104 (40)
Operating
Evaporator
Entering Fluid
38 (3.3)
86 (30)
38 (3.3)
90 (32.2)
Leaving Fluid
38 (3.3)
60 (15.6)
38 (3.3)
60 (15.6)
Entering Fluid w/ Antifreeze
2
20 (-6.7)
86 (30)
20 (-6.7)
90 (32.2)
Leaving Fluid w/ Antifreeze
2
20 (-6.7)
60 (15.6)
20 (-6.7)
60 (15.6)
Condenser
Entering Fluid
55 (12.8)
104 (40)
55 (12.8)
105 (40.6)
Leaving Fluid
See Note
3
110 (43.3)
See Note
3
111 (43.9)
Oil Cooler
Entering Fluid
35 (1.7)
80 (26.7)
35 (1.7)
80 (26.7)
Equipment Room
Air
40 (4.4)
104 (40)
40 (4.4)
104 (40)
NOTES:
1
Contact a Daikin Applied representative for performance at specific operating conditions, as some limits depend on unit configuration (including heating and
heat recovery mode limits)
2
Antifreeze temperature limits must have appropriate glycol concentration
3
Depends on specific selection/rating conditions
Field Insulation
If the optional factory-installation of thermal insulation is not
ordered, insulation should be field installed to reduce heat
loss and prevent condensation from forming. Insulation should
cover:
• motor barrel
• the evaporator barrel, tube sheet, and waterboxes.
• the suction line from the top of the evaporator to the
compressor inlet flange.
• the compressor support brackets welded to the
evaporator.
• the liquid line from the expansion valve to the evaporator
inlet, including the expansion valve.
• the part load balance valve to the evaporator.
Approximate total square footage of insulation surface required
for individual packaged chillers is tabulated by evaporator code
and can be found in
Table 2
.
Table 2: Insulation Area Required for Vessels
Evaporator Code
Insulation Area
sq. ft. (m
2
)
E3016
207 (19.2)
E3620
207 (19.2)
E4216
264 (24.5)
E4220
330 (30.6)
E4816
302 (28.1)
E4820
377 (35.0)