F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
25
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. Refer to current
edition of NSCNGPIC in Canada. After all connections have been made,
purge lines and
check for leakage at furnace prior to operating furnace.
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
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.
Gas Pipe Grommet
For direct vent (2-pipe) applications, the knockout for the gas pipe must
be sealed to prevent air leakage. Remove the knockout, install the
grommet in the knockout, then insert the gas pipe. The grommet is
included in the loose parts bag, see
ELECTRICAL CONNECTIONS
See
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.
115-V Wiring
Furnace must have a 115-v power supply properly connected and
grounded.
NOTE:
Proper polarity must be maintained for 115-v wiring. If polarity
is incorrect, control LED status indicator light will flash code 10 and
furnace will
NOT
operate.
Use a separate, fused branch electrical circuit with a properly sized fuse
or circuit breaker for this furnace. See
for wire size and fuse
specifications. A readily accessible means of electrical disconnect must
be located within sight of the furnace.
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
for equipment electrical specifications.
U.S.A. Installations
: Make all electrical connections in accordance with
the current edition of the National Electrical Code (NEC) NFPA 70 and
any local codes or ordinances that might apply.
Canada Installations
: Make all electrical connections in accordance
with the current edition of the Canadian Electrical Code CSA C22.1 and
any local codes or ordinances that might apply.
A11401
Fig. 31 – Typical Field Wiring Diagram
Table 9 – Electrical Data
WARNING
!
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.
-
Before servicing, disconnect all electrical power to furnace.
-
When servicing controls, label all wires prior to disconnection.
Reconnect wires correctly.
-
Verify proper operation after servicing.
-
Always reinstall access doors after completing service and
maintenance.
WARNING
!
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury or death.
Blower door switch opens 115-v power to control. No component
operation can occur. Do not bypass or close switch with blower door
removed.
W/W1
W2
COM
Y/Y2
R
G
MODULATING
FURNACE
SIZE
VOLTS-
HERTZ-
PHASE
OPERATING VOLTAGE
RANGE
*
*. Permissible limits of the voltage range at which the unit operates satisfactorily.
MAX UNIT
AMPS
UNIT
AMPACITY
†
†. Unit ampacity = 125 percent of largest operating component’s full load amps plus 100 percent of all other potential operating components’ (EAC, humidifier, etc.) full load
amps.
MINIMUM
WIRE SIZE
AWG
MAXIMUM
WIRE LENGTH
FT (M)
‡
‡. Length shown is as measured one way along wire path between furnace and service panel for maximum 2 percent voltage drop
MAXIMUM FUSE
OR CKT BKR
AMPS
**
**. Time-delay type is recommended
Maximum
Minimum
0601714
115-60-1
127
104
9.0
12.0
14
30 (9.4)
15
0602120
115-60-1
127
104
14.1
18.4
12
31 (9.5)
20
0801714
115-60-1
127
104
9.0
12.0
14
30 (9.4)
15
0802120
115-60-1
127
104
14.1
18.4
12
31 (9.5)
20
1002122
115-60-1
127
104
14.1
18.4
12
31 (9.5)
20
1202422
115-60-1
127
104
14.1
18.4
12
31 (9.5)
20