General Specifications - Outdoor Air Cooled Modular Chillers

Model Number

RO20DSZ

RO30DSZ

RO50DSZ

RO50SSZ

RO75SSZ

RO90SSZ

Nominal Capacity" tons

20

30

50

54

75

84

Capacity 44°F lwt – EER**

19.0 - 11.6

28.8 - 11.7

44.5 - 11.8

48.1 - 10.5

65.6 - 10.7

74.7 - 10.8

Capacity 50°F lwt – EER**

21.4 - 13.0

32.3 - 13.1

50.1 - 13.2

54.1 - 11.6

74.2 - 11.8

84.1 - 11.9

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)

76.0 (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)

Evaporator

working pressure - psi (bar)

450 (30)

working temperature - F (C)

383 (195)

material

316L stainless steel plates, copper brazed

Fans

2

2

2

2

2

2

refrigeration circuits

2

2

2

1

1

1

number of fans per circuit

2

2

2

5

6

8

horsepower - rpm

1/2 - 850

1 - 850

1-1/2 - 850

1-1/2 - 850

1-1/2 - 850

1 - 850

cfm

24,000

36,160

34,640

29,861

51,960

68,592

dbA at a distance of 10' (at 50')

66.1 (52.6)

72.7 (59.2)

76.9 (63.4)

77.9 (64.4)

78.7 (63.4)

75.7 (62.2)

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)

1040 (472)

1089 (494)

1210 (549)

1564 (710)

2040 (925)

2099 (952)

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 95°F entering condenser air and 120°F condensing temperature.

1) Nominal chilled water flow 2.4 gpm/ton.
2) Amperage shown on dual “SCROLL” chillers is for each compressor. They are fused independently.
3) RLA: Rated Load Amps.
4) MCC: Maximum Continuous Current.
5) 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.