N80ESN/N80ESL(Series A): 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.
16
A02035
Fig. 23 – Typical Gas Pipe Arrangement
Piping should be pressure and leak tested in accordance with 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.
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 (35°C)
rise.
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
for equipment electrical specifications.
U.S. Installations:
Make all electrical connections in accordance with
National Electrical Code (NEC) NFPA 70 and any local codes or
ordinances that might apply.
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.
NOTE:
Proper polarity must be maintained for 115-v wiring. If polarity
is incorrect, control LED status indicator light will show a status code 10
and furnace will NOT operate.
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.
WARNING
!
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.
UNION
SEDIMENT
TRAP
MANUAL
SHUTOFF
VALVE
(REQUIRED)
GAS
SUPPLY
WARNING
!
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 current edition of NEC NFPA 70 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.
CAUTION
!
FURNACE MAY NOT OPERATE
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.
