16 Centrifugal Chillers IM 1044-2
Condenser
With positive pressure systems, the pressure variance with temperature is always predictable, and the vessel
design and relief protection are based upon pure refrigerant characteristics. R-134a requires ASME vessel design,
inspection and testing and uses spring-loaded pressure relief valves. When an over pressure condition occurs,
spring-loaded relief valves purge only that refrigerant required to reduce system pressure to their set pressure, and
then close.
Refrigerant side design pressure is 200 psi (1380 kPa) on WSC/WCC/HSC units and 225 psi (1552 kPa) on WDC
units. Water side design is 150 psi (1034 kPa) on all.
Pumpdown
To facilitate compressor service, all Daikin centrifugal chillers are designed to permit pumpdown and
isolation of the entire refrigerant charge in the unit’s condenser. Dual compressor units and single compressor
units equipped with the optional suction shutoff valve can also be pumped down into the evaporator.
T
able 3, Condenser Physical Data
Condenser
Code
WSC WDC WCC
Capacity
Capacity
Vessel Weight
lb. (kg)
Relief
C1809 X 597 (271) 43 (162) 1887 (856) 2
C1812 X 845 (384) 44 (166) 2050 (930) 2
C2009 X 728 (330) 47 (147) 1896 (860) 2
C2012 X 971 (440) 62 (236) 2528 (1147) 2
C2209 X 822 (372) 73 (278) 2596 (1169) 2
C2212 X 1183 (537) 76 (290) 2838 (1287) 2
C2216 X 1489 (676) 114 (430) 3861 (1751) 2
C2416 X 1760 (799) 143 (540) 4647 (2188) 2
C2609 X 1242 (563) 83 (314) 2737 (1245) 2
C2612 X 1656 (751) 111 (419) 3650 (1660) 2
C2616 X 2083 (945) 159 (603) 5346 (2425) 2
C3009 X 1611 (731) 108 (409) 3775 (2537) 2
C3012 X 2148 (975) 144 (545) 5033 (3383) 2
C3016 X 2789 (1265) 207 (782) 6752 (3063) 4
C3612 X 2963 (1344) 234 (884) 7095 (3219) 2
C3616 X 3703 (1725) 331 (1251) 9575 (4343) 4
C3620 X 4628 92100) 414 (1567) 12769 (5797) 4
C4212 X 3796 (1722) 344 (1302) 9984 (4529) 2
C4216 X 5010 (2273) 475 (1797) 12662 (5743) 4
C4220 X 5499 (2494) 634 (2401) 17164 (7785) 4
C4220 X 5499 (2497) 634 (2400) 17964 (8156) 4
C4812 X 4912 (2228) 488 (1848) 12843 (5826) 4
C4816 X 5581 (2532) 717 (2715) 18807 (8530) 4
C4820 X 7034 (3191) 862 (3265) 23106 (10481) 4
C4820 X 8307 (3768) 727 (2753) 18907 (8576) 4
1. Condenser pumpdown capacity based on 90% full at 90°F.
2. Water capacity based on standard configuration and standard heads and may vary depending on tube counts.
3. See Relief Valves section for additional information.
Compressor
Table 4, Compressor Weights
Compressor Size ⇒
063 079 087 100 113 126
Weight lb. (kg) ⇒
2000 (908) 3200 (1440) 3200 (1440) 6000 (2700) 6000 (2700) 6000 (2700)
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