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59SC6A: Installation, Start-up, Operating and Service and Maintenance Instructions
Gas entry can be from left or right side, or top panel. See
Fig.
31.
Left Side Gas Entry. Gas Pipe
Grommet Required For Direct
Vent Applications.
Fig. 30 – Gas Entry
Fig. 31 – Alternate Gas and Electric Entry
NOTE: Top plate may be field drilled for alternate gas and 115 VAC
electric entry.
Refer to
Table 10
for recommended gas pipe sizing. Risers must be used
to connect to furnace and to meter. Support all gas piping with
appropriate straps, hangers, etc. Use a minimum of one hanger every 6
ft. (2 M). Joint compound (pipe dope) should be applied sparingly and
only to male threads of joints. Pipe dope must be resistant to the action
of propane gas.
Table 10 – Maximum Capacity of Pipe
Nominal:
1/2 (12.7) 3/4 (19.0)
Actual ID:
0.622
0.824
Length (ft)
Capacity in Cubic Feet of Gravity
172
10 (3.0)
118
20 (6.0)
95
30 (9.1)
40 (12.1)
81
50 (15.2)
72
NOTE: Cubic ft. of natural 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: Chapter 6 current edition of ANSI
Z223/NFPA 54.
Gas Pressure
Natural (in W.C.)
Maximum
Minimum
When a flexible connector is used, black pipe shall be installed at the
furnace gas control valve and extend a minimum of 2-in. (51 mm)
outside the furnace.
For direct vent (2-pipe) applications, seal the gas pipe opening to prevent
air leakage.
Remove the required knockout or plug. Install the grommet in the
opening. Then insert the gas pipe. The grommet is included in the loose
parts bag.
Piping should be pressure and leak tested in accordance with the current
addition of the NFPA 54/ANSI Z223.1 in the United States, local, and
national plumbing and gas codes before the furnace has been connected.
Refer to current edition of NSCNGPIC in Canada. After all connections
have been made, purge lines and check for leakage at furnace prior to
operating furnace.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Fig. 30
Gas Pipe Grommet Required
For Direct Vent Applications
1-1/4
1 (25.4)
(31.8)
1.049
1.380
360
678
1390
247
466
957
199
374
768
170
320
657
151
284
583
Propane (in. w.c.)
13.8
4.5"
12"
and
PRESSURE TESTING ABOVE ½ psig:
The furnace and it's individual shut-off valve must be disconnected from
the gas supply piping system during any pressure testing of that system
at test pressures in excess of ½ psig (3.5 kPa).
PRESSURE TESTING BELOW ½ psig:
The furnace must be isolated from the gas supply piping by closing its
individual manual shut-off valve during any pressure testing of the gas
supply piping system at test pressures equal to or less than ½ psig (3.5
kPa).
FIRE OR EXPLOSION HAZARD
A failure to follow this warning could result in personal injury, death,
A11338
and/or property damage.
If local codes allow the use of a flexible gas appliance connector,
always use a new listed connector. Do not use a connector which has
previously served another gas appliance. Black iron pipe shall be
installed at the furnace gas control valve and extend a minimum of 2-in.
(51 mm) outside the furnace.
An accessible manual equipment shutoff valve MUST be installed
A230050
external to furnace casing and within 6 ft. (2 M) of furnace.
Install a sediment trap externally in the riser leading to furnace as shown
in
Fig.
32. Connect a capped nipple into lower end of tee. Capped nipple
should extend below level of furnace gas controls. Place a ground joint
union between furnace gas control valve and exterior manual equipment
gas shutoff valve.
GAS
SUPPLY
1-1/2
MANUAL
(38.1)
SHUT OFF
VALVE
1.610
(REQUIRED)
2090
SEDIMENT
TRAP
1430
1150
985
873
Fig. 32 – Typical Gas Pipe Arrangement
A 1/8-in. (3 mm) NPT plugged tapping, accessible for test gauge
connection, MUST be installed immediately upstream of gas supply
connection to furnace and downstream of manual equipment shutoff
valve.
Piping should be pressure and leak tested in accordance with the current
edition of the NFPA 54/ANSI Z223.1 in the United States, local, and
national plumbing and gas codes before the furnace has been connected.
Refer to current edition of NSCNGPIC in Canada. After all connections
have been made, purge lines and check for leakage at furnace prior to
operating furnace.
NOTE: The furnace gas control valve inlet pressure tap connection is
suitable to use as test gauge connection providing test pressure DOES
NOT exceed maximum 0.5 psig (14-in. w.c.) stated on gas control valve.
See
Fig.
65.
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.
24
WARNING
!
FRONT
NOTE: Union may be inside th e
UNION
vestibule where permitted b y
local codes .
A11035
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