22
SERVICE
Controls/Adjustments/
Replacements
Temperature Controls
The water temperature is controlled by the heater ther-
mostat on the upper front panel of the heater. The
control center contains an On-Off toggle switch and a
thermostat. The switch functions as a means for turn-
ing the heater on or off.
The thermostat is fitted with a means of limiting the
upper temperature limit below the maximum level. The
knob stop adjustment ring illustrated above is
adjustable by loosening the set screw, rotating the
knobstop ring to the desired location and retightening
the set screw.
Drain Valve
Solid State Thermostat &
Ignition Control
Pressure Switch
Burner & Pilot
Thermal Fuse
HIGH LIMITS
(Located in the
Inlet/Outlet header)
Gas Valve
CAUTION:
Label all wires prior to disconnection
when servicing controls. Wiring errors can cause
improper and dangerous operation. Verify proper
operation after servicing.
DANGER - SHOCK HAZARD -
Make sure
electrical power to the heater is disconnected to
avoid potential serious injury or damage to
components.
Knobstop Ring
Set Screw
Typical
Comfortable
Pool
Temperature
Range
Typical
Comfortable
Spa
Temperature
Range
Fig. 22: Knobstop Setting
Fig. 23: General Location of Controls
