Installation Guide

Pomona, CA Clemmons, NC Nashville, TN
Tel: [phone] www.haywardpool.com
USE ONLY HAYWARD GENUINE REPLACEMENT PARTS
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TEMPERATURE LOCK-OUT:
The digital thermostat in this pool heater allows the user to lock the maximum temperature setting allowed.
This feature is useful for preventing unauthorized users from manually adjusting the temperature settings higher
than desired. On a new heater, the maximum allowed temperature lock settings are initially set at the factory to
90°F for POOL mode, and 104°F for SPA mode. To adjust these settings, use the following procedure:
1. Use the MODE button to put the heater in STANDBY mode.
2. Press and hold both the UP and DOWN buttons at the same time.
3. After 3 seconds, the thermostat enters maximum temperature lock adjustment mode.
4. The SPA indicator light illuminates and the numeric display shows the current SPA mode maximum
temperature lock setting. Both the SPA indicator light and the numeric display ashes rapidly when in
adjustment mode.
5. Use the UP and DOWN buttons to set the desired maximum temperature lock setting. When nished,
press the MODE button.
6. The POOL indicator light illuminates and the numeric display shows the current POOL mode
maximum temperature lock setting. Both the POOL indicator light and the numeric display ashes
rapidly when in adjustment mode.
7. Use the UP and DOWN buttons to set the desired maximum temperature lock. When nished, press
the MODE button.
8. The heater will return to STANDBY mode
FAHRENHEIT VERSUS CELSIUS:
The temperature can be displayed in Fahrenheit or Celsius. TO change the display, use the “MODE” button
to place the heater in “STANDBY”. Then press and hold the “UP” and “MODE” buttons until the display shows
the °F/°C selection. Press the “DOWN” button to toggle between selections. To accept the selection, press the
“MODE” button. If the user does not act, the selection will be automatically accepted after 60 seconds.
HEATING MODE:
The control continually compares the water temperature with the set point and the high limit temperature.
When the water temperature is more than 1° below the set point a call for heat is generated and a heating
cycle is initiated.
1. The control checks for open contacts at the blower vacuum switch.
2. The control energizes the blower and the igniter. The igniter heat-up time is approximately 20 seconds.
The blower is running a pre-purge cycle during this time.
3. The control checks for closed contacts at the blower vacuum switch.
4. When the igniter reaches the proper temperature a 4-second trial for ignition begins. The control opens
the gas valve and monitors ame current. The igniter is turned off when ame is sensed or after 4 sec-
onds.
5. The blower vacuum switch, the temperature limit switches, the vent pressure switch, the water pressure
switch, the water temperature sensors, and the ame sensor are constantly monitored during a call for
heat to assure the heater is operating properly.
6. When the thermostat is satised and the call for heat ends the control immediately de-energizes the
gas valve. Flame is extinguished.
7. The control operates the blower during a 30-second post-purge period.