HWM-H-IOM (10/14)
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7. Heat Exchanger Maintenance
A compact brazed heat exchanger is utilized in the Hydronic Water Module.
The water flow rate designed into each of these heat exchangers is 2 or more gallons
per minute per ton of nominal system capacity.
The acceptable water flow rate range for each system is shown in Figures 11 and 12. To
ensure the proper performance of the heat exchanger,
it is CRITICAL that the flow rate
not
drop below the minimum.
COMPRESSOR UNIT SIZE
& CAPACITY, BTUH
HWM
MODELS
MIN. WATER
FLOW RATE,
GPM
-018 (18,000)
-1836
3.0
-024 (24,000)
-1836
4.0
-030 (30,000)
-1836
5.0
-036 (36,000)
-1836
6.0
-042 (42,000)
-4248
7.0
-048 (48,000)
-4248
8.0
-054 (54,000)
-5472
9.0
-060 (60,000)
-5472
10.0
-072 (72,000)
-5472
12.0
Figure 11. Minimum Heat Exchanger Water Flow Rates
