General Specifications - Water and Glycol Modular Chillers

Model Number

WO20DSZ

WO30DSZ

WO50DSZ

WO50SSZ

WO75SSZ

WO90SSZ

Nominal Capacity" tons

20

30

50

50

75

90

Capacity 44°F lwt – EER**

21.1 - 16.3

31.9 - 16.3

49.4 - 15.9

54.6 - 14.8

75.6 - 15.2

84.7 - 15.2

Capacity 50°F lwt – EER**

23.8 - 18.4

35.7 - 18.2

55.4 - 17.5

61.1 - 16.3

84.8 - 16.5

94.7 - 16.6

Refrigeration Circuits

2

2

2

1

1

1

Refrigerant Type

R-22

R-22

R-22

R-22

R-22

R-22

Compressor

type

Scroll

Scroll

Scroll

Screw

Screw

Screw

number

2

2

2

1

1

1

speed rpm 60 hertz (50 hertz)

3500 (2900)

3500 (2900)

3500 (2900)

3500 (2900)

3500 (2900)

3500 (2900)

Evaporator - Brazed Plate

water flow - gpm (l/m)

50.0 (188.0)

75.0 (286.0)

117.0 (441.0)

130.0 (490.0)

180.0 (678.0)

202.0 (761.0)

water pressure drop - psi (kPa)

1.7 (11.7)

2.5 (17.2)

5.5 (37.9)

5.0 (34.4)

5.6 (38.6)

8.0 (55.0)

45% glycol flow - gpm (l/m)

59.0 (222.0)

83.0 (312.0)

137.0 (516.0)

152.0 (573.0)

210.0 (791.0)

236.0 (889.0)

45% glycol pressure drop - psi (kPa)

3.6 (25.0)

4.1 (28.2)

8.9 (61.3)

8.2 (56.5)

9.1 (62.7)

9.7 (66.8)

Condenser - Brazed Plate

water flow - gpm (l/m)

62.0 (233.0)

92.0 (346.0)

144.0 (542.0)

162.0 (610.0)

223.0 (840.0)

250.0 (942.0)

water pressure drop - psi (kPa)

1.9 (13.0)

2.7 (18.6)

9.0 (62.0)

8.2 (56.5)

8.6 (59.2)

9.7 (66.8)

45% glycol flow - gpm (l/m)

69.0 (260.0)

105.0 (395.0)

163.0 (614.0)

183.0 (689.0)

253.0 (953.0)

283.0 (1067.0)

45% glycol pressure drop - psi (kPa)

2.8 (19.3)

4.0 (27.5)

13.6 (93.7)

12.3 (84.8)

11.9 (82.0)

12.8 (88.2)

Evaporator & Condenser

working pressure - psi (bar)

450 (30)

working temperature - F (C)

383 (195)

material

316L stainless steel plates, copper brazed

Dimensions

length - in. (mm)

48 (1219)

48 (1219)

48 (1219)

54 (1371)

54 (1371)

54 (1371)

width - in. (mm)

24 (609)

24 (609)

24 (609)

36 (914)

36 (914)

36 (914)

height - in. (mm)

73 (1854)

73 (1854)

73 (1854)

73 (1854)

73 (1854)

73 (1854)

Weight - lbs (kg)

1166 (529)

1262 (573)

1805 (819)

2264 (1027)

2354 (1068)

2448 (1110)

RLA - MCC - Maximum Fuse Size

230/3/60

38.6-52.4-60.0

55.2-75.0-80.0

87.9-123.0-130.0

205.0-230.0-300.0

251.0-280.0-375.0

305.0-341.0-450.0

460/3/60

18.9-25.7-35.0

27.2-37.0-40.0

43.0-60.0-65.5

102.0-115.0-150.0

120.0-134.0-180.0

146.0-163.0-210.0

575/3/60

15.7-21.3-25.0

24.3-33.0-25.0

32.1-48.0-50.0

82.0-92.0-120.0

96.0-107.0-140.0

115.0-130.0-170.0

380-400/3/50

26.1-35.5-40.0

37.5-51.0-55.0

54.3-76.0-80.0

102.0-115.0-150.0

120.0-134.0-180.0

146.0-163.0-210.0

* Ton capacity is 12,000 btu/ton.
** Capacity and EER based on entering condenser water, condensing at 100

1) Minimum entering tower water 70°F. If lower, we recommend our motorized water regulating valve for head pressure control.
2) Chilled water flow 2.4 gpm/ton, condenser water flow 3 gpm/ton.
3) Amperage shown on dual “SCROLL” chillers is for each compressor. They are fused independently.
4) RLA: Rated Load Amps.
5) MCC: Maximum Continuous Current.
6) Maximum Fuse Size= RLA x 1.55

OPTIONS AVAILABLE:

Inlet water filters with by-pass valves for cleaning without shutting down cooling system
Stainless steel chilled & condenser water headers across back of chillers
Building control system interface module for BACnet
Alternate freons available 134a, 404a and 407c

OTHER PRODUCTS:

Certified to meet all applicable North American electrical safety codes.