Raypak P-1826 manual Servicing, General Location Of Controls, Temperature Control, Pressure Switch

SERVICING

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

Fig. 28: General Location of Controls

(Models 926-1826)

Models 2100-4001

Inlet/Outlet

Header w/Bypass

Pump

Electrical

Connection

	Main	Burner
Manual On/Off Valve	Gas	Valve

Fig. 29: General Location of Controls

(Models 2100-4001)

Temperature Control

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 on Models 926-1223 equipped with a Unitherm Governor, 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 pres- sure 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-clock- wise 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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