SYSTEM OPERATION
21
When installing a propane storage tank, the contractor
must consider proper tank sizing, safety, efficiency, ground
characteristics and aesthetics. For a residential customer,
the size may range from 100-1,000 gallons, depending on
household use. Typically, a 500 gallon tank is ample for an
average four-bedroom home. However, it is best to consult
your local propane supplier to ensure the proper sizing for
propane storage requirements. Determining the correct tank
size for each household is a function of demand, economy,
efficiency and convenience. It is a process that requires co
-
operation between the propane supplier and customer.
ELECTRICAL CONNECTIONS
WARNING
To avoid the risk of electrical shock, wiring to the unit must
be properly polarized and grounded.
WARNING
HIGH VOLTAGE
Disconnect ALL power before servicing or
changing any electrical wiring. Multiple pow
-
er sources may be present. Failure to do so
may cause property damage, personal injury
or death.
CAUTION
Label all wires prior to disconnection when servicing
controls. Wiring errors can cause improper and dangerous
operation. Verify proper operation after servicing.
ELECTRICAL CONNECTIONS
Wiring Harness
The wiring harness is an integral part of this furnace. Wires
are color coded for identification purposes. Refer to the wir
-
ing diagram for wire routings. If any of the original wire as
supplied with the furnace must be replaced, it must be re-
placed with wiring material having a temperature rating of
at least 105°C. Any replacement wiring must be a copper
conductor.
115 Volt Line Connections
Before proceeding with electrical connections, ensure that
the supply voltage, frequency, and phase correspond to that
specified on the unit rating plate. Power supply to the fur
-
nace must be NEC Class 1, and must comply with all appli-
cable codes. The furnace must be electrically grounded in
accordance with local codes or, in their absence, with the
latest edition of The National Electric Code, ANSI NFPA 70
and/or The Canadian Electric Code CSA C22.1.
WARNING
HIGH VOLTAGE!
To avoid personal injury or death due to
electrical shock, disconnect electrical power
before servicing or changing any electrical
wiring.
Humidifier
1.0 Amp maximum at 120 VAC
Electronic Air Cleaner
1.0 Amp maximum at 120 VAC
Use a separate fused branch electrical circuit containing
properly sized wire, and fuse or circuit breaker. The fuse
or circuit breaker must be sized in accordance with the
maximum overcurrent protection specified on the unit rat
-
ing plate. An electrical disconnect must be provided at the
furnace location.
Connect hot, neutral, and ground wires as shown in the wir-
ing diagram located on the unit’s blower door. Metal conduit
is not considered a substitute for an actual ground wire to
the unit. For direct vent applications, the cabinet opening to
the junction box must be sealed air tight using either an UL
approved bushing such as Heyco Liquid Tight or by applying
non-reactive UL approved sealant to bushing.
Line polarity must be observed when making field connec
-
tions. Line voltage connections can be made through either
the right or left side panel. The furnace is shipped configured
for a left side (right side for counterflows) electrical connec
-
tion with the junction box located inside the burner compart-
ment. To make electrical connections through the opposite
side of the furnace, the junction box must be relocated to
the other side of the burner compartment prior to making
electrical connections.
To relocate the junction box, follow the steps shown in the
Junction Box Relocation section.
WARNING
Edges of sheet metal holes may be sharp. Use gloves as a
precaution when removing hole plugs.
WARNING
To prevent personal injury or death due to electrical shock,
disconnect electrical power before installing or servicing
this unit.
