SunTouch® - Pentair

62
Connecting SunTouch to a Gas Heater
The SunTouch motherboard provides a set of low voltage dry contacts that can be connected to most gas
heaters and heat pumps. Refer to your heater documentation for specific wiring instructions for connecting the
heater to an external control (typically using a two-wire remote control connection).
Note: SunTouch motherboard heater screw terminals (J12) can be used for high voltage connection not
higher than 24 VAC or VDC current for electric heaters or heat pumps.
Connecting to a standard heater
The following installation instructions are for gas heaters and heat pumps with low voltage thermostats.
To connect a standard heater to SunTouch:
1. Switch the power OFF to the heater.
2. Run a two-conductor cable from the heater thermostat area to the low voltage raceway to the
motherboard in the SunTouch Power Center. Use 105° C temperature rated wire for connection to
the heater. When connecting wires inside the heater, be cautious of HOT internal parts of the heater.
Refer to the heater owners manual for the manufacturer’s recommendations for the minimum
temperature rating for wires.
3. Strip the conductors ¼ in. Insert the wires into the GAS HEATER two-screw terminals (J12) on the
motherboard. For SunTouch motherboard wiring connections, refer to “SunTouch Motherboard
Connections,” on page 53.
4. At the heater, connect the wires in accordance with heater manufacturer’s instructions. For older
heaters without instructions for remote operation, connect the wires to the “Fireman’s Switch”
connections in series with the thermostat, pressure switch, and other safety switches.
5. Do NOT disconnect or wire around the thermostat, pressure switch, high limit switch, or other safety
devices.
6. Switch ON the main power switch of the heater. Note, SunTouch does not control the AC power to
the heater.
7. Set the heater thermostat to the maximum hottest setting.
8. From the SunTouch menu (see page 26): Goto Main Menu 10/14 “Circ Functions” and assign
AUX 1 or AUX 2 to “HEATER.”
Connecting to a Pentair Water Pool and Spa ® MiniMax ® , MasterTemp® Gas Heater
To connect a MiniMax, or MasterTemp heater to the SunTouch power center:
1. Switch the power OFF to the heater.
2. Remove the factory installed jumper from the “Ext Switch” connector.
3. Connect the two-wire cable from J12 on the SunTouch motherboard to the “Ext Switch” terminal.
CAUTION: Be sure that the wires from the heater to the SunTouch Power Center are not near
or touching any line voltage wires in the heater. Failure to follow these instructions may cause
the heater to malfunction.
4. Set the Power (Thermostat Select) switch to either “Pool” or “Spa.”
5. Set the “Pool” and “Spa” thermostats to their maximum position.
6. From the SunTouch menu (see page 26): Goto Main Menu 10/14 “Circ Functions” and assign
AUX 1 or AUX 2 to “HEATER.”
SunTouch Solar, Pool and Spa Control System Installation and User’s Guide