HWM-407CH-IOM (09/13)
Page 25
Figure 13. Minimum Heat Exchanger Propylene Glycol/Water Solution Flow Rates
To test the solution flow through the hydronic water module, average three solution flow rate
readings when the HWM is in continuous operation as shown in Figure 6.
Check the flow rate against the appropriate rates in Figures 12 or 13.
If flow rate is less than the appropriate minimum shown in Figures 12 or 13,
and the
strainer mesh is clean
, the heat exchanger is to be cleaned by setting the system up as
noted in Figure 14.
Compressor Unit
Size/Capacity
(BTUH)
HWM
Model
Minimum Propylene Glycol/Water Solution Flow
Rates, GPM
20% PG
30% PG
40% PG
50% PG
-018 (18,000)
-18B
3.1
3.2
3.3
3.5
-024 (24,000)
-24B
4.1
4.3
4.4
4.6
-030 (30,000)
-30B
5.2
5.4
5.6
5.8
-036 (36,000)
-36B
6.2
6.4
6.7
7.0
-042 (42,000)
-42B
7.2
7.5
7.8
8.1
-048 (48,000)
-48B
8.2
8.6
8.9
9.3
-060 (60,000)
-60B
10.3
10.7
11.1
11.6
-072 (72,000)
-72B
12.4
12.8
13.3
13.9
