Form I-RA/D 140/235 (Version A), Page 18
Heating
Thermostat
Pump Power
Installation
Pump Power
To connect the electrical power from the heater to the pump,
• Use a 3 conductor, 14 gauge wire system - two 115 volt con-
ductors and a ground. Use BX if permitted, but make certain
to follow local codes for running conduit.
• Refer to the wiring diagram for connecting terminals.
Power
Installation
Heater Power
To install main power to the system (check the table below and the
rating plate on the furnace for current requirements),
• Use #12 gauge stranded copper wire for RA and #8 gauge for
RAD to run a dedicated 115 volt, single phase, line from the
power source to a junction box mounted on the wall behind the
heater or as required by appropriate codes.
• Run the length of appropriate conduit from the heater to the
junction box.
• Connect the black wire to the hot lead.
• Connect the white wire to the neutral lead.
• Connect the green wire to the ground lead.
• Install a fused manual reset, line voltage switch (field supplied)
in this main line
• Electrical
Ratings
A 24-volt thermostat is furnished as standard equipment.
DO NOT
attempt to wire relays or other accessories to the thermostat
connections as these are not load terminals.
DO NOT
install on or suspend the thermostat from the heater
DO NOT
install thermostat on a cold outside wall
To install the thermostat,
• Locate the thermostat five feet above the floor on an inside
wall, not in the path of warm or cold air currents nor in corners
where air may be pocketed
• Remove the thermostat cover
• Make sure the heat anticipator dial is set at 0.2 amps
• Connect the wires through the back of the thermostat to the R
& W terminals
• Set the ON/OFF switch on the heater electrical box to the
“OFF” position and connect the thermostat wires to the two
“T” terminals on the ignition controller.
Model
Total
Current
Amperes
Minimum
Circuit
Ampacity
Maximum
Fuse Size
(Supply)
RA140
13
16
20
RAD140
24
30
40
RA235
14
18
20
RAD235
24
30
40
DANGER: Make sure that the main circuit is OFF be-
fore making any wiring connections. All wiring must
be done in accordance with appropriate Codes!
