Adjusting Water Pressure Switch
On some models of the Heat Siphon® a gas heater type water pressure sensing switch is used to detect flow rather than direct flow measurement. The switch prevents Heat Siphon® operation with no water flow. Adjustment is required when the vertical distance from the pool surface to the Heat Siphon® thermostat knob is more than a few feet above or below pool level .
To correct this condition, DISCONNECT ALL ELECTRICAL POWER. Remove the knob and cover to the control box and adjust the switch as follows:
Location of Water Ptressure Switch in Control Box
The Water Pressure switch is located in the control box, on the lower left corner
and is mounted by a nut on the opposite side that screws onto the switch theaded
boss just below the hose nipple. both of which are hidden in the above view
Turn the pressure switch thumb wheel until the top of the wheel lines up with the proper psi lines.
