H
Table 8 - Maximum Capacity of Pipe
NOMINAL LENGTH OF PIPE - FT (M)
IRON PIPE
SIZE 10 20 30 40 50
IN. (MM) (3.0) (6.0) (9.1) (12.1) (15.2)
1/2 (13) 175 120 97 82 73
3/4 (19) 350 250 200 170 151
1 (25) 580 455 375 320 285
1-1/4 (32) 1400 950 770 550 580
1-1/2 (39) 21 O0 1450 1180 990 900
* 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:
Table 8 above and 6.2 of NFPA54/ANSl Z223.1-2009.
Left Side Gas Entry. Gas Pipe
Grommet Required For Direct
Vent Applications.
Gas Pipe Grommet Required
For Direct Vent Applications
Fig. 29 - Gas Entry
I
Al1338
MANUAL ,._
SHUTOFF [
VALVE
(REQUIRED)
J
SEDIMENT
TRAP
UNION _
\
FRONT
/
/
NOTE: Union may be inside the
vestibule where permitted by
local codes.
Fig. 30 - Typical Gas Pipe Arrangement
ELECTRICAL CONNECTIONS
Al1035
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 ANSI/NFPA 70-2011 or local
codes to minimize personal injury if an electrical fault
should occur. In Canada, refer to Canadian Electrical Code
CSA C22.1. 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 nmst remain grounded
through green/yellow wire routed to gas valve and manifold
bracket screw.
l15-V Wiring
Furnace must have a l15-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
rapidly 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 utility is sufficient to handle load imposed by this
equipment. Refer to rating plate or Table 9 for equipment electrical
specifications.
U.S.A. Installations: Make all electrical connections in accordance
with the current edition of the National Electrical Code (NEC)
ANSI/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.
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
iniury 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.
See Fig. 34 for field wiring diagram showing typical field 115-v
wiring. Check all factory and field electrical connections for
tightness.
FIRE HAZARD
Failure to follow this warning could result in personal
iniury, death, or property damage.
Do not connect aluminum wire between disconnect
switch and furnace. Use only copper wire. See Fig. 32.
Use a separate, fused branch electrical circuit with a properly sized
fuse or circuit breaker for this furnace. See Table 9 for wire size
and fuse specifications. A readily accessible means of electrical
disconnect must be located within sight of the furnace.
32
To Next Page
Loading...
