PG80MSU: 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.
14
Field-supplied wiring shall conform with the limitations of 63°F (35°C)
rise
) 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
rating plate or
for equipment electrical specifications.
Make all electrical connections in accordance with current edition of
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 flash rapidly and
Status code (
10.1
) is displayed. The furnace will NOT operate.
A180241
Fig. 23 – Heating and Cooling Application Wiring Diagram with
1-Stage Thermostat
Table 6 – Electrical Data
A190279
Fig. 24 – Field-Supplied External Electrical Box on Furnace Casing
J-Box Relocation
NOTE:
If factory location of J-Box is acceptable, go to next section
(ELECTRICAL CONNECTION TO J-BOX).
1. Remove and save two screws holding J-Box.
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 two screws removed in Step 1.
5. Route J-Box wires within furnace away from sharp edges, rotating
parts and hot surfaces.
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 gas valve mounting bracket screw.
Unit Size
Volts-
Hertz- Phase
Operating Voltage
*
Range
*. Permissible limits of the voltage range at which the unit operates satisfactorily.
Maximum
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 unit and service panel for maximum 2 percent voltage drop.
Maximum
Fuse or CKT
BKR
**
Amps
**. Time-delay type is recommended.
Maximum
Minimum
36040B
115-60-1
127
104
8.6
11.2
14
33 (10.1)
15
48060B
115-60-1
127
104
11.0
14.2
14
26 (7.9)
15
60080C
115-60-1
127
104
14.2
18.2
12
31 (9.6)
20
60100C
115-60-1
127
104
14.2
18.2
12
31 (9.6)
20
WARNING
!
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.
