Service manual

SECTION 10: WIRING
21 of 59
SECTION 10: WIRING
DANGER
Electrical Shock Hazard
Disconnect electric before service.
More than one disconnect switch may be
required to disconnect electric from
equipment.
Equipment must be properly grounded.
Failure to follow these instructions can result
in death or electrical shock.
All heater models require constant 120 V / 1Ø / 60
Hz power supply. Check heater serial 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 suit
able to power a 24 V thermostat.
Heater must be wired and electrically grounded in
accor
dance with local codes. In the absence of local
codes in accordance with: United States: refer to
National Electr
ical Code
®
NFPA 70 - latest revision
Canada: refer to Canadian Electrical Code CSA
C22.1 Part I - latest revision.
10.1 Positioning Thermostats
A room thermostat should be mounted on a
vibr
ation-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
ar
eas directly exposed to radiant heat or sunlight.
Install wall tag in a visible location near thermostat.
See Page 4, Section 2.1 for wall tag details.
10.1.1 Fan Control
The heater’s axial fan can be used during the off-
season f
or air circulation. A low voltage
programmable thermostat with fan switch (P/N
90425400) must be used. For thermostat
connection details, See Page 22, Section 10.2 and
Page 22, Section 10.3. For the use of multiple
heaters on one thermostat, See Page 23, Section
10.4 and Page 24, Section 10.5.