AHI Carrier Catalog | Page 488

Operating limits

Water heat exchanger water flow rate Flow rate , l / s
30RQSY
Minimum Maximum * Maximum dual pump ** Low pressure *** High pressure ***
039
0.9
3.0
2.9
3.4
045
0.9
3.4
3.2
3.8
050
0.9
4.2
3.7
4.4
060
0.9
5.0
4.1
5.0
070
1.0
5.0
4.1
5.0
078
1.2
5.5
4.4
5.2
080
1.2
6.8
5.1
6.2
090
1.3
6.8
5.1
6.2
100
1.5
7.7
6.3
6.5
120
1.7
8.5
6.5
8.0
140
2.0
10.6
7.9
8.7
160
2.3
11.2
8.2
8.9
*
Maximum flow rate at a pressure drop of 100 kPa in the plate heat exchanger ( unit without hydronic module ).
**
Maximum flow rate at an available pressure of 20 kPa ( unit with low-pressure hydronic module ) or 50 kPa ( high-pressure module ).
***
Maximum flow rate with single pump is 2 to 4 % higher , depending on the size .
HEATING
Operating range , standard unit , cooling mode 30RQSY Min Max
Evaporator Entering water temperature at start-up
° C 7.5 *
30
Leaving water temperature during operation
° C 5 **
20
Entering / leaving water temperature difference
K
3
10
Condenser
Entering air temperature ***
° C -20
46
Note : Do not exceed the maximum operating temperature .
Operating range , standard unit , heating mode 30RQSY Min Max
Condenser Entering water temperature at start-up
° C 8
45
Leaving water temperature during operation
° C 25
55
Entering / leaving water temperature difference
K
3
10
Evaporator
Air temperature
° C -15
40
Note : Do not exceed the maximum operating temperature .
* For entering water temperatures below 7.5 ° C at start-up , contact Carrier . ** For low-temperature applications , where the leaving water temperature is below 5 ° C , a frost protection solution must be used .
*** For transport and storage of the 30RQSY units the minimum and maximum allowable temperatures are -20 ° C and + 48 ° C . It is recommended that these temperatures are used for transport by container .
50
40
30RQSY ( cooling mode )
60
55
30RQSY ( heating mode )
Outside air temperature , ° C
30
20
10
0
-10
Leaving water temperature , ° C
50
45
40
35
30
-20
25
0 5 10 15 20 25 Evaporator leaving water temperature , ° C
20
-20
-10
0
10
20
30
40
50
Outside air temperature , ° C
Full load
Minimum load
Note : This operating range applies up top 130 Pa static pressure without suction air duct for sizes 060 , 070 and 078 and 140-160 , and up to 240 Pa for all other sizes .
Full load Minimum load
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