Daikin DWDC079, Installation, Operation And Maintenance Manual

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Refrigerant side design pressure is 200 psi (1380 kPa) on DWSC units and 225 psi (1552 kPa) on DWDC 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.
Table 3, Condenser Physical Data
Condenser
Code
DWSC DWDC
Pumpdown
Capacity
lb. (kg)
Water
Capacity
gal. (L)
Vessel Weight
lb. (kg)
Number of
Relief Valves
C1609 X 468 (213) 33 (125) 1645 (746) 2
C1612 X 677 (307) 33 (123) 1753 (795) 2
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
C2212 X 1110 (504) 89 (337) 3075 (1395) 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) 4
C3616 X 3703 (1725) 331 (1251) 9575 (4343) 4
C3620 4628 92100) 414 (1567) 12769 (5797) 4
C4212 X 3796 (1722) 344 (1302) 9984 (4529) 4
C4216 X 5010 (2273) 475 (1797) 12662 (5743) 4
C4220 X 5499 (2494) 634 (2401) 17164 (7785) 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) 6
1.
Condenser pumpdown capacity based on 90% full at 90

F.
2.
Water capacity based on standard configuration and standard heads and can be less with lower tube counts.
3.
See Relief Valves section for additional information.
Compressor
Table 4, Compressor Weights
Compressor Size

079 087 100 113 126
Weight lb. (kg)

3200 (1440) 3200 (1440) 6000 (2700) 6000 (2700) 6000 (2700)
Oil Coolers
Daikin centrifugal chillers, sizes 079 through 126, have a factory-mounted, water-cooled oil cooler, temperature-
controlled water regulating valve and solenoid valve per compressor.
DWSC single compressor cooling water connections are located near the compressor and are shown on the specific unit
certified drawings. Also see Figure 10 on page 26. Dual compressor chillers, DWDC/ 079 - 126 are equipped as above,
but the water piping for the two oil coolers is factory-piped to a common inlet and outlet connection located in the tube
sheet under the evaporator. The exception to this is the DWDC 100 and 126 with 16-foot shells, where the common
connections are centered at the rear of the unit. See Figure 11 on page 26.