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SECTION 9: WIRING
15
SECTION 9: WIRING
WARNING
Electrical Shock Hazard
Disconnect electrical power and gas supply before
servicing.
This appliance must be connected to a properly
grounded electrical source.
Failure to follow these instructions can result in
death or electrical shock.
All heater models require constant 120 V 60 Hz 1Ø
power supply. Check heater(s) rating plate for
electrical rating for proper circuit sizing. For
servicing, a disconnect switch of proper electrical
rating should be installed in the vicinity of the heater.
All heaters are equipped with thermostat
connections suitable to power a 24 V thermostat.
Heater must be wired and electrically grounded in
accordance with local codes. In the absence of local
codes in accordance with: United States: refer to
National Electrical Code
®
ANSI/NFPA 70 - latest
revision Canada: refer to Canadian Electrical Code
CSA C22.1 Part I - latest revision.
9.1 Positioning Thermostats
A room thermostat or ROBERTS GORDON
®
control should be mounted on a vibration-free wall or
column at a height of approximately 5' (1.5 m) from
the floor to measure the ambient temperature. It
should be clear of both cold drafts and the direct
path of warm air from the heater.
Avoid mounting thermostat on outside walls or in
areas directly exposed to radiant heat or sunlight.
Install wall tag in a visible location near thermostat.
9.1.1 Fan Control
The heater’s axial fan can be used during the off-
season for air circulation. A low voltage thermostat
with fan control must be used.
See Page 15, Section
9.2 for thermostat connection details.
9.2 Low Voltage Thermostat with One Heater
R
G
W
C
Electrical
Supply
Terminal
Strip
R
W
R
G
24 Volt
Thermostat
Heating Only
24 Volt
Thermostat
with Fan Control
W
C
R
G
W
C
Terminal
Strip
Electrical
Supply