Tempstar F8MTL, Installation Instructions Manual

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441 01 2101 05
Specifications are subject to change without notice.
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.
!
WARNING
See Figure 23 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.
!
WARNING
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.
CAUTION
!
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 7 for
equipment electrical specifications.
Table 7 – Electrical Data
FURNACE
SIZE
VOLTS −
HERTZ −
PHASE
OPERATING VOLTAGE
RANGE
MAX UNIT
AMPS
UNIT
AMPACITY#
MAXIMUM
WIRE
LENGTH
FT. (M)‡
MAXIMUM
FUSE OR
CKT BKR
AMPS†
MINIMUM
WIRE
GAUGE
MAX* MIN.*
0451412 115 − 60 − 1 127 104 7.1 9.67 38 (11.5) 15 14
0701412 115 − 60 − 1 127 104 7.3 9.90 37 (11.2) 15 14
0901714 115 − 60 − 1 127 104 8.2 10.84 34 (10.3) 15 14
1102122 115 − 60 − 1 127 104 13.7 17.60 32 (9.7) 20 12
* Permissible limits of the voltage range at which the unit operates satisfactorily.
# Unit ampacity = 125% of largest operating component’s full load amps plus 100% of all other potential operating components (EAC, humidifier,
etc.) full load amps.
Time − delay type is recommended.
Length shown is as measured 1 way along wire path between unit and service panel for maximum 2% voltage drop.
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.
FIRE HAZARD
Failure to follow this warning could result in personal
injury, death, or property damage.
Do not connect aluminum wire between disconnect
switch and furnace. Use only copper wire.
!
WARNING
Use a separate branch electrical circuit with a properly sized
fuse or circuit breaker for this furnace. See Table 7 for wire
size and fuse specifications. A readily accessible means of
electrical disconnect must be located within sight of the
furnace.
NOTE : Proper polarity must be maintained for 115 − v wiring.
If polarity is incorrect, control LED status indicator light will
flash status code of 10 and furnace will NOT operate.
J − BOX RELOCATION
NOTE : If factory location of J − Box is acceptable, go to next
section (ELECTRICAL CONNECTION TO J − BOX).
NOTE : On 14” wide casing models, the J − Box shall not be
relocated to other side of furnace casing when the vent pipe
is routed within the casing.
1. Remove and save two screws holding J − Box. (See
Figure 24)
NOTE : The J − Box cover need not be removed from the
J − Box in order to move the J − Box. Do NOT remove green
ground screw inside J − Box.
2. Cut wire tie on loop in furnace wires attached to J − Box.
3. Move J − Box to desired location.
4. Fasten J − Box to casing with the two screws removed
in Step 1.
5. Route J − Box wires within furnace away from sharp
edges, rotating parts, and hot surfaces.