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22 | Section
REMOTE CONTROL CONNECTIONS
1. Switch off power to heater at main circuit breaker panel.
2. Unbolt and remove the access door panels.
3. Open control box cover (see Figure 28).
4a. To connect a 2-Wire Control (such as Pentair's IntelliTouch
Systems) or a timer:
- Remove the factory installed jumper from the Fireman's Switch terminals.
- Connect wires between the Fireman's Switch terminals on the heater and the
relay. Connect wires from the controller or timer to the Fireman's Switch.
Controller, timer or relay should be sized to handle 24VAC at 0.5 Amp (because
it will be completing the 24VAC control board circuit on the heater as shown in
Figure 30). DO NOT apply line voltage to the Fireman's Switch terminals. Use
18 gauge (1.16 mm) wire with a minimum 1.2 mm (3/64 in.) thick insulation
rated for a temperature rise of at least 105° C.
- Knock-outs are provided to route the wires through the bottom of the control box
and past the junction box.
4b. To connect a 3-Wire Control:
- Connect wires between the control board terminals on the heater and the external relays, as shown in Figure 30 on
page 26. Use at least 2 relays per heater, to allow for an "OFF setting" on each heater mode. Select relays that can
handle logic level switching. DO NOT apply line voltage to control board terminals.
- Move jumper (as shown in Figure 30 on page 23) to enable external control and to disable the heater membrane pad's
"Pool ON" and "Spa ON" buttons (the "OFF" key on the membrane pad remains functional).
- Knock-outs are provided to route the wires through the bottom and the top of the control box and past the junction
box.
5. Close control box cover.
6. Re-install the access door panels.
To control heaters that are operated in parallel, connect wiring at same locations on heater as 2-Wire or 3-Wire Control. It
is imperative that each control circuit is isolated from the other control circuits, to avoid that current will flow from one
heater to another through the control circuits.
NOTICE: The fuse for the Fireman's Switch is a 1.25 Amp 31.75 mm x 6.35 mm fast blow fuse, which is commonly
available.
™
MASTERTEMP
Pool and Spa Heater Installation and User's Guide
All manuals and user guides at all-guides.com
™
or EasyTouch
Section 2. Installation
™
Control
Figure 29.
P/N 475106 Rev. D 1/2016
Figure 28.
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