Raypak P926, P1826, P2100, P4001 manual Temperaturecontrol, Pressure Switch Adjustment

SECTION 4/ SERVICING INSTRUCTIONS

GENERAL LOCATION OF CONTROLS

MODELS 926-1826

Inlet/Outlet	Pressure
Header	Switch
Unitherm	Electrical
Governor	Conn.
Hi-limit
control/
Temp. Control	Main Burner Gas Valve

MODELS2100-4001

Inlet/Outlet

Header w/Bypass

Pump

		Electrical
		Connection
	Main Burner	Fig. #9261.1
Manual On/Off Valve	Gas Valve

TEMPERATURECONTROL

The pool water temperature is controlled by the pool thermostat.

The heater water temperature high limit is controlled by the manual reset high limit.

PRESSURE SWITCH

The pressure switch, or heater actuator, ensures that the heater operates only when the filter pump is in operation. It is factory set at 1.75 PSI for deck level installations. When the heater is located below the level of the spa or pool, it may be necessary to reset the pressure switch to compensate for the no-flow static head. If it is necessary to reset the pressure switch, we recommend the following procedure:

PRESSURE SWITCH ADJUSTMENT:

1.Make sure the pool filter is clean before adjusting the switch.

2.Set the heater control to the OFF mode.

3.Turn the filter pump on and confirm that the pressure switch is closed (use a multimeter to check). If the pressure switch fails to close, either the switch setting is too high or the filter pump is not supplying enough pressure.

4.Turn the heater ON.

5.Manually turn the pressure adjustment knob clock- wise until the heater shuts off. (A flat screw driver may be necessary if knob is too tight).

6.Slowly turn the adjustment knob counter-clockwise until the heater calls for heat again.

7.Turn an additional 1/2 turn counter-clockwise.

8.While the heater is running, check the adjustment by turning the pump off and on several times. The burners should shut off immediately when the pump is turned off. If it does not, repeat the above steps until proper operation is observed.

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