2 Owner manual

Installation & Operation Manual
8 Electrical connections (continued)
37
High water temperature limit controls
The pool heater is equipped with one auto-reset high water
temperature limit control. If water temperature exiting the heat
exchanger exceeds the trip point, the limit will break the control
circuit and shut down the unit. The limit control will only be
reset after the water temperature has cooled below the reset
point of the limit. The high water temperature limit controls are
mounted in the outlet side of the front header (FIG. 8-4).
The heater is also equipped with an outlet temperature limiting
thermostat. The thermostat will limit the outlet temperature of
the mixed water (bypass and heat exchanger) to less than 140°F.
Figure 8-4_Front Header with Limits
The limit control will not reset until the
water temperature has dropped below the
reset point of the high limit.
NOTICE
Pressure switch adjustment
The pressure switch is located in the front header, above the
water connections. When required, the pressure switch can be
reset with the following procedure:
1. Clean filter and skimmer.
2. Start filter pump.
3. Set digital thermostat to highest setting.
4. Turn the adjustment knob on the pressure switch
clockwise until the combustion air fan in the front
control panel turns off. Fan will not turn off if
system pressure exceeds 5 PSI.
5. Slowly turn the adjustment knob counterclockwise
until the combustion air fan turns on. Turn the knob an
additional 1/4 turn counterclockwise.
6. Turn the filter pump off and on several times. The
heater should shut down immediately when the pump
stops.
7. If the heater does not shut down immediately as the
filter pump stops, repeat steps 4, 5, and 6 until proper
operation is achieved.
8. Reset thermostat to desired temperature setting.
 WARNING
Operation of the pool heater without proper
flow will cause immediate non-warrantable
damage to the heat exchanger.
Water pressure switch
The pressure switch is factory preset for normal installations at
deck level. The switch will stop operation of the pool heater on
low water flow. The water pressure switch is factory preset at
5 PSI. Do not adjust the pressure switch unless the pool heater
is located more than four feet above or below the deck level.
Integrated controller
The pool heater is equipped with a microprocessor based
adjustable digital integrated controller to provide ON/OFF
operation. Operation is based on temperature input from
an immersion sensor. The immersion temperature sensor
senses inlet water temperature to the pool heater and is
located in the inlet side of the front header. The integrated
controller allows two temperature set points to be
programmed into the control, one for pool operation and
one for spa operation. The sensor is a negative temperature
coefficient thermistor. A liquid crystal display is provided
to indicate sensed temperature and operating parameters.
Figure 8-3_Integrated Controller and Display Keys
Temperature adjustment procedure
The pool heater allows for two different temperature set
points, one for Pool Mode and one for Spa Mode. To adjust
the pool temperature set point while in Pool Mode and not
in the Service or Setup Menu, press the UP or DOWN
button once to bring up the Temperature Adjustment
Screen. Press the UP or DOWN button again to adjust the
setting. Repeat this process while in Spa Mode to adjust the
spa set point.