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Table 10 —- 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)
360
250
200
170
151
1 (25)
680
465
375
320
285
1-1/4 (82)
1400
950
770
660
580
1-1/2 (89)
2100
1460
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 10 above and 6.2 of NFPA54/ANSI 2223.1—2009.
Left Side Gas Entry. Gas Pipe
Grommet Required For Direct
Vent Applications.
Gas Pipe Grommet Required
For Direct Vent Applications
A11338
Fig. 30 - Gas Entry
GAS
——_*
SUPPLY
FRONT
MANUAL
SHUT OFF
booger ic?
VALVE
"
'
(REQUIRED)
Va
NOTE:
Union may be inside the
SEDIMENT
UNION
vestibule where permitted by
TRAP
local codes.
A11085
Fig. 31 - Typical Gas Pipe Arrangement
ELECTRICAL CONNECTIONS
A A
SS
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.
See Fig. 35 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.
CA
UN Le:
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.
4
CAUTION
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.
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
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
11
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.
A A
SS
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. Use only copper wire. See Fig. 33.
Use a separate, fused branch electrical circuit with a properly sized
fuse or circuit breaker for this furnace. See Table 11 for wire size
and fuse specifications. A readily accessible means
of electrical
disconnect must be located within sight of the furnace.
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