Installation manual

31
Connecting Low Voltage Components to the System Control Center (cont’d)
LOW VOLTAGE CONTROL CIRCUIT FOR HEATERS
This section applies to all heaters or heat pumps that have
control circuitry of 24VAC or less.
An internal relay with low voltage dry contacts is provided
to connect to the low voltage control of the heater. See the
figure for a typical connection.
1. Route the heater wires through the low voltage
raceway and connect the two-position terminal
block TB3 labeled ‘Low Voltage Heater’. Be sure to
use wire with the temperature rating required by the
heater manufacturer.
2. Connect the other ends of the wires to the
heater control circuit as required by your specific
heater instructions.
WARNING: DO NOT DISCONNECT ANY OF THE HEATER
HIGH-LIMIT OR PRESSURE SWITCHES.
3. Turn the heater thermostat(s) to the maximum setting.
4. Turn the heater switch to the ON position.
5. If provided, set the heater selector switch to HIGH or
to SPA.
VALVE 2VALVE 1
1
J24
1
J23
S1
IN3+
IN3-
SETUP RUN
DIP SWITCH
DOLPHIN
RF
1
S2
J31
1
TB3
HEATER
ON
OFF
THERMOSTAT
LIMIT
PRESSURE
GAS VALVE
CONTROL
Low Voltage
Heater TB3
Fig. 21 Low Voltage Heater Connection to TB3 on
Main Panel Board
(Refer to Fig. 13)
After all low voltage wiring has been installed, arrange the wiring so that it is somewhat evenly spaced along the
length of the entry slot. Secure the wires by tightening the two screws.
FIREMAN’S SWITCH CONNECTION FOR HEATER