Pentair ETi 250 - Remote Control Connections; Firemans Switch Connection

ETi 250 High Efficiency Pool and Spa Heater Installation and User’s Guide
44
Electrical Connections
TIME CLOCK/FIREMAN'S SWITCH (See Figure 36 above):
A time clock controlling the filter pump should be a dual switch low-voltage Fireman’s Switch should be set to shut
off the call for heat to the pool heater 15 to 20 minutes before shutting down the pool pump. Always use crimp type
connectors when connecting two wires. To operate the heater with a time clock, connect the timer to the fireman’s
switch wiring connection, as shown in the illustration on right. The fireman’s switch connection is located at the
Yellow jumper wire below the fuse. The fireman’s switch connection must be a dry contact and must not supply
power to the heater. Powering the fireman’s switch connection externally may damage the heater, and is not
covered by the warranty.
FIREMAN’S SWITCH
Figure 36.
CONNECTION OF FIREMAN’S SWITCH OR
REMOTE CONTACT YELLOW JUMPER WIRE
REMOTE CONTROL CONNECTIONS
1. NOTE: Switch off power to heater at main circuit breaker panel.
2. Remove the side panel. Unlock the panel latch lock, see Figure 34 on page 42.
3. Locate the Fireman Switch jumper wire; remove the wire. See Figure 36 below.
4. Connect the Remote Control Dry Contact wires. See Figure 36 below.
ELECTRICAL CONNECTIONS
(CONTINUED)
4. To connect a 2-Wire Control (for IntelliCenter Control System) 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 24 VAC at 0.5
Amp (because it will be completing the 24 VAC control board circuit on the heater as shown in Figure 35 on
page 43). DO NOT apply line voltage to the Fireman’s Switch terminals. Use 18 gauge wire with a minimum
3/64-in (1.2 mm) thick insulation rated for a temperature rise of at least 105°C.
5. Close front side door panel.
To control heaters that are operated in parallel, connect wiring at same locations on heater as 2-Wire. It is imperative
that each control circuit is isolated from the other control circuits, to avoid that current will ow from one heater to
another through the control circuits.
NOTICE: The fuse for the Fireman’s Switch is a 1.25 Amp 1¼ x ¼” fast blow fuse, which is commonly available.