441 01 2613 05
19
Specifications are subject to change without notice
3. Use black iron or steel pipe and fittings or other pipe approved
by local code.
4. Use pipe thread compound which is resistant to natural and
Propane gases.
5. Use ground joint unions and install a drip leg no less than 3
″
(76.2mm) long to trap dirt and moisture before it can enter gas
valve inside furnace.
6. Provide a
1
/
8
″
NPT plugged tapping for test gauge connection
immediately up stream of gas supply connection to furnace.
7. Use two pipe wrenches when making connections to prevent
furnace gas valve from turning.
NOTE: 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.
8. Flexible corrugated metal gas connector may
NOT
be used
inside the furnace or be secured or supported by the furnace
or ductwork.
9. Properly size gas pipe to handle combined appliance load or
run gas pipe directly from gas meter or Propane gas regulator.
10. Install correct pipe size for run length and furnace rating.
11. Measure pipe length from gas meter or Propane second
stage regulator to determine gas pipe size.
Right Side Gas Supply Piping (N8MP)
Gas line can be installed directly to the gas valve through the hole
provided in the right side of the cabinet. See
Figure 12
Left Side Gas Supply Piping (N8MP)
Two(2) 90
°
street elbows or two(2) 90
°
standard elbows and
two(2) close nipples are required for left side gas supply. See
Figure 12.
Piping with Street Elbows
1. Assemble the elbows so that the outlet of one(1) elbow is 90
°
from the inlet of the other. The elbows should be tight enough
to be leak proof. An additional
1
/
4
turn will be required at the
end of step 2, see
Figure 13
.
Figure 13
25
!
23
!
23c
Elbows (N8MP)
2. Screw elbow assembly into gas valve far enough to be leak
proof. Position elbow assembly so that the inlet of the elbow is
at the top of the gas valve. An additional
3
/
8
turn will be
required in step 3. Turn open end of inlet elbow to face the left
side of the furnace (
1
/
4
turn), see
Figure 14
.
Figure 14
Gas Valve with Elbows (N8MP)
Representative drawing only, some models may vary in appearance.
3. Turn assembly an additional
3
/
8
turn to position inlet near the
bottom back corner of the gas valve in line with gas opening
on left side of furnace, see
Figure 15
.
4. Gas supply line then can be run directly into opening of elbow.
Piping with Close Nipples and Standard Elbows
1. Assemble elbows and nipples similar to street elbows shown
in
Figure 13
.
2. Follow steps 2 through 4
Piping with Street Elbows.
Figure 15
Gas Valve with Elbows (N8MP)
Representative drawing only, some models may vary in appearance.
FIRE HAZARD
Failure to follow this warning could result in
personal injury, or death, and/or property damage.
Use wrench to hold furnace gas valve when turning
elbows and gas line to prevent damage to the gas
valve and furnace.
!
WARNING
Left Side Gas Entry (*8MP) (See Figure 16)
Pipe can be run directly to gas valve through the hole provided in
the left side of the cabinet.
Right Side Gas Entry (*8MP) (See Figure 16)
Two (2) 90
°
street elbows or two (2) 90
°
standard elbows and two
(2) close nipples are required for right side gas supply,.
National Excelsior Company
www.excelsiorhvac.com
Subject to change without notice.
