F96CTN and G96CTN (Series A): Installation, Start-up, Operating, Service and Maintenance Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
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A11338
Fig. 29 – Gas Entry
A170125
Fig. 30 – Alternate Gas and Electric Entry
NOTE:
Top plate may be field drilled for alternate gas and 115 VAC
electric entry.
Refer to
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 9 – Maximum Capacity of Pipe
* 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:
and 6.2 of the
current edition of NFPA54/ANSI Z223.1.
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 knockout to
prevent air leakage.
Remove the required knockout. Install the grommet in the knockout.
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 NFGC 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.
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).
An accessible manual equipment shutoff valve MUST be installed
external to furnace casing and within 6 ft. (2 M) of furnace.
Install a sediment trap externally in riser leading to furnace as shown in
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.
A11035
Fig. 31 – 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
addition of the
NFGC 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
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
NOMINAL
IRON PIPE
SIZE
IN. (MM)
LENGTH OF PIPE - FT (M)
10 (3.0) 20 (6.0)
30 (9.1) 40 (12.1) 50 (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 (32)
1400
950
770
660
580
1-1/2 (39)
2100
1460
1180
990
900
Gas Pressure
Natural (in W.C.)
Propane (in W.C.)
Maximum
13.8
Minimum
4.5”
12”
Gas Pipe Grommet Required
For Direct Vent Applications
Left Side Gas Entry. Gas Pipe
Grommet Required For Direct
Vent Applications.
1 1/2 inch for Gas
7/8 inch for 115 VAC Electric
WARNING
!
FIRE OR EXPLOSION HAZARD
A failure to follow this warning could result in personal injury, death,
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.
GAS
SUPPLY
MANUAL
SHUT OFF
VALVE
(REQUIRED)
SEDIMENT
TRAP
UNION
NOTE: Union may be inside th
e
vestibule where permitted by
local codes.
FRONT
