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935SB: Installation, Start-up, Operating and Service Maintenance Instructions
Table 12 – Maximum Capacity of Pipe
NOMINAL
IRON PIPE
SIZE
10 (3.0)
20 (6.0)
IN. (MM)
1/2 (13)
175
3/4 (19)
360
1 (25)
680
1-1/4 (32)
1400
1-1/2 (39)
2100
1460
* Cubic ft of gas per hr for gas pressures of 0.5 psig (14-in. w.c.) or less and a pressure drop of
0.5-in. w.c. (based on a 0.60 specific gravity gas). Ref:
Z223.1 (current edition).
Fig. 35 – Gas Entry
Fig. 36 – Alternate Gas and Electric Entry
NOTE: Top plate may be field drilled for alternate gas and 115 VAC
electric entry
GAS
SUPPLY
MANUAL
SHUT OFF
VALVE
(REQUIRED)
UNION
SEDIMENT
TRAP
Fig. 37 – Typical Gas Pipe Arrangement
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
LENGTH OF PIPE - FT (M)
30 (9.1)
40 (12.1) 50 (15.2)
120
97
82
250
200
170
465
375
320
950
770
660
1180
990
(Table
12) and 6.2 of NFPA54/ANSI
1 1/2 inch for Gas
7/8 inch for 115 VAC Electric
FRONT
NOTE: Union may be inside th e
vestibule where permitted b y
local codes .
ELECTRICAL CONNECTIONS
ELECTRICAL SHOCK, FIRE OR EXPLOSION HAZARD
73
Failure to follow safety warnings could result in dangerous operation,
151
serious injury, death or property damage.
285
580
Improper servicing could result in dangerous operation, serious injury,
900
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.
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.
A190265
Field wiring diagram showing typical field 115-V wiring (see
Check all factory and field electrical connections for tightness.
Field-supplied wiring shall conform with the limitations of 63_F (35_C)
rise.
ELECTRICAL SHOCK AND FIRE HAZARD
Failure to follow this warning could result in personal injury, death, or
property damage.
A170125
The cabinet MUST have an uninterrupted or unbroken ground
according to 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.
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.
A11035
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 Status code
(10.1) is displayed. The and furnace will NOT operate.
Verify that the voltage, frequency, and phase correspond to that specified
on unit rating plate. Also, check to be sure that service provided by
24
WARNING
!
WARNING
!
WARNING
!
CAUTION
!
Fig.
41).
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