20
OPERATING INSTRUCTIONS
OPTIONS:
ADJUSTABLE THERMOSTAT:
Regulates the maximum discharge temperature. Turn the dial to the
desired maximum discharge temperature. This may cause the burner to fire
intermittently.
BALL VALVE: (Auxiliary Tank)
1. Connect hose from auxiliary tank to open port on the 3-way ball valve.
2. Use the selector lever on the ball valve to allow water to flow from the
auxiliary tank to the pump.
3. The water level in the auxiliary tank must always be higher than the pump
inlet. This will ensure gravity feed of water to the pump. Failure to keep the
water level above the pump inlet will result in the pump running dry and
damage to the wet end of the pump.
HDC-SERIES Operator's Manual