Application Data; Operating Limits; Minimum Chilled Water Flow; Maximum Chilled Water Flow - Carrier AquaForce PUREtec 30XWHPZE 301 Installation, Operation And Maintenance Instructions
Water-cooled liquid chillers and heat pump with r-1234ze(e) or optionally with r-515b refrigerant
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6 - APPLICATION DATA
6.1 - Operating limits
30XW-PZE/30XWHPZE
Evaporator
Entering temperature at start-up
Leaving temperature during operation
Entering/leaving temperature difference at full load
Condenser
Entering temperature at start-up
Leaving temperature during operation
Entering/leaving temperature difference at full load
(1) Use of antifreeze protection is required if the leaving temperature is below 3.3°C
(Option 8).
(2) For lower condenser temperatures a water flow control valve must be used at
the condenser (two or three-way valve). Please refer to option 152 to ensure
the correct condensing temperature.
(3) Please refer to option 150 for applications with a high condenser leaving
temperature (up to 70°C).
Note: Ambient temperatures: During storage and transport
(including by container) the minimum and maximum
permissible temperatures are -20°C and 70°C.
70.0
65.0
60.0
55.0
50.0
45.0
40.0
35.0
30.0
25.0
20.0
15.0
10.0
5.0
0.0
5.0
Evaporator leaving water temperature, °C
From approx. 45% to full load.
Part load limit approx. 35%.
Minimum load limit approx.15%.
6.2 - Minimum chilled water flow
The minimum chilled water flow is shown in the table in chapter
7.6.
If the system flow is less than the minimum unit flow rate, the
evaporator flow can be recirculated, as shown in the diagram.
For minimum chiller flow rate
Legend
1
Evaporator
2
Recirculation
18
Minimum Maximum
-
3,3°C
(1)
2,8 K
13,0°C
(2)
19,0°C
(2)
55,0°C
2,8 K
10.0
15.0
20.0
1
2
6.3 - Maximum chilled water flow
The maximum chilled water flow is limited by the permitted
pressure drop in the evaporator. It is provided in the table in chapter
7.6.
Bypass the evaporator as shown in the diagram to obtain a lower
35,0°C
evaporator flow rate.
20,0°C
For maximum chiller flow rate
11,1 K
-
(3)
11,1 K
Legend
1
Evaporator
2
Bypass
6.4 - Condenser water flow rate
The minimum and maximum condenser water flow rates are shown
in the table in chapter 7.6.
6.5 - Standard and optional number of water
passes
The unit is equipped of two passes on evaporator and on
condenser.
Size
301 401 451 551 601 651 801 901 1001 1101
Evaporator
25.0
Standard
Option 100C
Condenser
Standard
Option 102C
6.6 - Evaporator and condenser water flow rate
Size
301 401 451 551 601 651 801 901 1001 1101
Evaporator water flow rate, l/s
Minimum
Maximum
Condenser water flow rate, l/s
Minimum
Maximum
Notes
- Minimum evaporator flow rate based on a water velocity
of 0,3 m/s.
- Minimum condenser flow rate based on a water velocity
of 0,3 m/s.
- Maximum flow rate based on a pressure drop of 120 kPa
(units with two evaporator passes and two condenser
passes).
1
2
30XW-PZE/30XWHPZE
2
2
2
2
2
2
1
1
1
1
1
1
2
2
2
2
2
2
1
1
1
1
1
1
30XW-PZE/30XWHPZE
4
6
6
8
8
8
39
57
57
76
76
76
4
6
6
8
8
8
29
55
55
74
74
74
2
2
2
2
1
1
1
1
2
2
2
2
1
1
1
1
11
11
13
13
84
84
116 116
12
12
18
18
119 119 130 130
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