www.DaikinApplied.com 9 IOM 1281-2 • CENTRIFUGAL WATER CHILLERS
Figure 4: Operating/Standby Limits
1
R-513A R-134a
Condition Description
°F (°C)
°F (°C)
°F (°C)
°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
heat recovery mode limits)
2
Antifreeze temperature limits must have appropriate glycol concentration
3
Field Insulation
If the optional factory-installation of thermal insulation is not
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
• 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
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)
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