62
SunTouch
®
Control System Installation and User’s Guide
Connecting SunTouch
®
Control System to a Gas Heater
The SunTouch
®
Control System 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:
The SunTouch Control System 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 the SunTouch Control System:
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 Control System 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 Control System motherboard wiring connections, refer to “SunTouch
Control System 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; the SunTouch Control System does not
control the AC power to the heater.
7. Set the heater thermostat to the maximum hottest setting.
8. From the SunTouch Control System menu (see page 26): Goto Main Menu 10/14 “
Circ Functions
”
and assign AUX 1 or AUX 2 to “
HEATER
.”
Connecting to a Pentair Aquatic System MiniMax
®
, MasterTemp
®
Gas Heater
To connect a MiniMax or MasterTemp
®
Heater to the SunTouch Control System 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 Control System motherboard to the “Ext
Switch” terminal.
CAUTION: Be sure that the wires from the heater to the SunTouch Control
System 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 Control System menu (see page 26): Goto Main Menu 10/14 “
Circ Functions
”
and assign AUX 1 or AUX 2 to “
HEATER
.”
