HWM-407CH-IOM (09/13)
Page 18
5. Controls and Electrical
A. Hydronic Heating and Chilled Water Cooling
Figures 3 and 5 illustrate a typical hydronic heating and chilled water cooling primary circuit
configurations. The use of a three-way valve is shown in these illustrations. For heating,
the valve is normally open with the flow from the HWM directed DOWNWARD providing
heated water to the storage water heater. When cooling is called for, the valve is energized
and directs chilled water UPWARD to the hydronic circulating pump.
The electrical field wiring for the HHK-1872 hydronic hot water temperature controller and
the electric heating element/thermostat; and the CWK-1872 chilled water temperature
controller is illustrated in Figure 10c (Part 1 of 2) and 10c (Part 2 of 2).
Figure 10c. (Part 1 of 2) Electrical Field Wiring
– Hydronic Heating and Chilled Water Cooling (HWM)
