Carrier AQUAZONE 50PSW036-360 User Manual download pdf (Page 32)

The 50PSW units can be configured with a field-supplied

control system for ice and snow melting. In commercial

applications where fast ice removal is required, keeping the

slab at a stationary temperature just below the freezing

point and then gradually increasing the hot water tempera-

ture may reduce melting time.

NOTE: To prevent thermal expansion of the slab due to

extreme temperature differences, hot water temperature

should be slowly increased.

50PSW UNIT OPERATING TEMPERATURE LIMITS (C)

BUILDING COMMISSIONING

BUILDING OPERATING

WATER TEMPERATURE CHANGE (C)

THROUGH HEAT EXCHANGER

COAX WATER PRESSURE DROP

UNIT SIZES 036-120

UNIT SIZES 180,360

NOTE: Bold values indicate use of antifreeze is required.

50PSW

UNIT SIZE

COOLING HEATING

Source

Min/Max

Load

Min/Max

Ambient

Min/Max

Source

Min/Max

Load

Min/Max

Ambient

Min/Max

036 10/43 16/27 7/43 –1/27 16/49 4/29

060,120 10/49 16/32 7/43 –1/27 16/49 4/29

180,360 10/32 16/32 7/43 10/21 27/49 4/29

50PSW

UNIT SIZE

COOLING HEATING

Source

Min/Max

Load

Min/Max

Ambient

Min/Max

Source

Min/Max

Load

Min/Max

Ambient

Min/Max

036 10/49 10/32 7/43 –7/27 16/54 4/29

060,120 10/49 10/32 7/43 –7/27 16/54 4/29

180,360 10/43 10/32 7/43 –7/21 16/49 4/29

HOT WATER

LOOP FOR ICE

MELTING

FREEZERS

DISPLAY

COOLERS

50RHR

Water-to-Air

Unit

COOLING TOWER

OR GROUND

LOOP

PARKING

LOT

50PSW

SNOW MELTING SYSTEMS

a50-8181

WATER FLOW RATE (L/m)

RISE (C)

(Cooling)

DROP (C)

(Heating)

For Closed Loop:

Ground Source or Cooler/Boiler

Systems at 3.2 L/m per kW

5.0-6.7 2.2-4.4

For Open Loop:

Ground Water Systems at 1.6 L/m per kW

11.1-14.4 5.6-9.4

50PSW UNIT

SIZE

L/s

PRESSURE DROP (kPa)

–1 C 10 C 21 C 32C

Source/Outdoor Coax

036

0.28

0.43

0.57

11.7

28.3

49.0

9.0

23.4

41.4

6.9

19.3

35.2

5.5

16.5

31.0

060

0.47

0.71

0.95

10.3

27.6

47.6

9.0

23.4

42.8

17.2

47.6

88.3

14.5

42.1

80.0

120

0.95

1.42

1.89

11.7

30.3

52.4

9.7

26.2

46.9

8.3

22.8

42.1

6.2

18.6

34.5

Load/Outdoor Coax

036

0.28

0.43

0.57

—

4.1

9.7

18.0

3.4

9.0

16.5

2.1

7.6

15.2

060

0.47

0.71

0.95

—

9.7

24.1

42.8

9.0

22.1

40.0

8.3

20.7

37.9

120

0.95

1.42

1.89

—

11.0

26.2

46.9

9.7

24.1

44.1

2.1

22.8

41.1

50PSW UNIT

SIZE

L/s

PRESSURE DROP (kPa)

0 C 10 C 20 C 30C

Source/Outdoor Coax

180

1.10

1.67

2.21

4.82

17.92

32.40

2.76

11.72

22.75

1.72

11.38

21.37

0.88

9.47

19.30

360

2.21

3.34

4.42

11.03

26.88

48.95

8.27

24.82

44.82

7.22

23.10

41.36

6.29

21.29

38.47

Application data (cont)

1 2 ... 27 28 29 30 31 32 33 34 35 36 37 ... 43 44

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Carrier AQUAZONE 50PSW036-360 User Manual Page 32

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