Electrical Connections - International comfort products F8MVL Installation Instructions Manual

NOTE: The furnace gas control valve inlet pressure tap
connection is suitable to use as test gauge connection
providing test pressure DOES NOT exceed maximum 0.5 psig
(14−In. W.C.) stated on gas control valve. (See Figure 49)
Some installations require gas entry on right side of furnace
(as viewed in upflow). (See Figure 21)
Install a sediment trap in riser leading to furnace as shown in
Figure 22. Connect a capped nipple into lower end of tee.
Capped nipple should extend below level of furnace gas
controls. Place a ground joint union between furnace gas
control valve and exterior manual equipment gas shutoff valve.
A 1/8−in. (3 mm) NPT plugged tapping, accessible for test
gauge connection, MUST be installed immediately upstream
of gas supply connection to furnace and downstream of
manual equipment shutoff valve.
Piping should be pressure and leak tested in accordance with
the current addition of the NFGC in the United States, local,
and national plumbing and gas codes before the furnace has
been connected. After all connections have been made, purge
lines and check for leakage at furnace prior to operating
furnace.
If pressure exceeds 0.5 psig (14−In. W.C.), gas supply pipe
must be disconnected from furnace and capped before and
during supply pipe pressure test. If test pressure is equal to or
less than 0.5 psig (14−In. W.C.), turn off electric shutoff switch
located on furnace gas control valve and accessible manual
equipment shutoff valve before and during supply pipe
pressure test. After all connections have been made, purge
lines and check for leakage at furnace prior to operating
furnace.
The gas supply pressure shall be within the maximum and
minimum inlet supply pressures marked on the rating plate
with the furnace burners ON and OFF.
Figure 21 − Burner and Manifold
2" (51mm)
Street Elbow
Figure 22 − Typical Gas Pipe Arrangement
GAS
SUPPLY
MANUAL
SHUTOFF
VALVE
(REQUIRED)
SEDIMENT
TRAP
UNION
18

ELECTRICAL CONNECTIONS

ELECTRICAL SHOCK, FIRE OR EXPLOSION HAZARD
Failure to follow safety warnings could result in dangerous
operation, serious injury, death or property damage.
Improper servicing could result in dangerous operation,
serious injury, death or property damage.
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Blower access panel door switch opens 115−v power to
control. No component operation can occur. Do not
bypass or close switch with panel removed.
See Figure 25 for field wiring diagram showing typical field
115−v wiring. Check all factory and field electrical connections
for tightness.
Field−supplied wiring shall conform with the limitations of 63_F
(33_C) rise.
ELECTRICAL SHOCK AND FIRE HAZARD
Failure to follow this warning could result in personal injury,
death, or property damage.
The cabinet MUST have an uninterrupted or unbroken
ground according to NEC NFPA 70−2011 or local codes to
minimize personal injury if an electrical fault should occur.
This may consist of electrical wire, conduit approved for
electrical ground or a listed, grounded power cord (where
permitted by local code) when installed in accordance with
existing electrical codes. Refer to the power cord
manufacturer's ratings for proper wire gauge. Do not use
gas piping as an electrical ground.
A08551
FURNACE MAY NOT OPERATE HAZARD
Failure to follow this caution may result in intermittent
furnace operation.
Furnace control must be grounded for proper operation or
else control will lock out. Control must remain grounded
through green/yellow wire routed to gas valve and
manifold bracket screw.
115−V Wiring
Verify that the voltage, frequency, and phase correspond to
that specified on unit rating plate. Also, check to be sure that
service provided by utility is sufficient to handle load imposed
by this equipment. Refer to rating plate or Table 6 for
equipment electrical specifications.
U.S. Installations: Make all electrical connections in
accordance with National Electrical Code (NEC) NFPA
70−2011 and any local codes or ordinances that might apply.
A02035
Specifications are subject to change without notice.
WARNING
!
S
Before servicing, disconnect all electrical power
to furnace.
S
When servicing controls, label all wires prior to
disconnecting. Reconnect wires correctly.
S
Verify proper operation after servicing.
WARNING
!
WARNING
!
CAUTION
!
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