16
–
Rigid metallic pipe and fi ttings.
–
Semi-rigid metallic tubing and metallic fi ttings.
Aluminum alloy tubing must not be used in exterior
locations.
–
Use listed gas appliance connectors in accordance
with their instructions. Connectors must be fully in
the same room as the furnace.
–
Protect connectors and semi-rigid tubing against
physical and thermal damage when installed.
Ensure aluminum-alloy tubing and connectors are
coated to protect against external corrosion when
in contact with masonry, plaster, or insulation, or
subjected to repeated wetting by liquids such as
water (except rain water), detergents, or sewage.
Gas line
entrance
Right side
gas entrance
(alternate)
General Furnace Layout
Figure 8
U
PFLOW
I
NSTALLATIONS
When the gas piping enters through the side of the furnace
,
the installer must supply the following fi t tings (starting from
the gas valve):
• Close
nipple.
•
90 degree elbow.
•
Straight pipe to reach the exterior of the furnace .
A ground joint union, drip leg, and manual shutoff valve must
also be supplied by the installer. In some cases, the installer
may also need to supply a transition piece from 1/2” to another
pipe size.
When the gas piping enters through the left side of the furnace,
the installer must supply the following fi ttings (starting from
the gas valve):
•
90 degree elbow.
•
Straight pipe to reach the exterior of the furnace.
•
A ground joint union, drip leg, and manual shutoff
valve must also be supplied by the installer. In
some cases, the installer may also need to supply a
transition piece from 1/2 inch to another pipe size.
C
OUNTERFLOW
I
NSTALLATIONS
When the gas piping enters through the left side of the furnace,
the installer must supply a straight pipe and a 90 degree elbow
to reach the exterior of the furnace.
A ground joint union, drip leg and manual shutoff valve must
also be supplied by the installer. In most cases, the installer
may also need to supply a transition piece from ½” to another
pipe size. When the gas piping enters through the right side
of the furnace, the installer must supply the following fi ttings
(starting at the gas valve):
• Close
Nipple
•
90 Degree Elbow
•
Straight Pipe to Reach Exterior of Furnace.
G
AS
P
IPING
C
HECKS
Before placing unit in operation, leak test the unit and gas
connections.
T
O
AVOID
THE
POSSIBILITY
OF
EXPLOSION
OR
FIRE
,
NEVER
USE
A
MATCH
OR
OPEN
FLAME
TO
TEST
FOR
LEAKS
.
WARNING
Check for leaks using an approved chloride-free soap and
water solution, an electronic combustible gas detector, or other
approved testing methods.
NOTE:
Never exceed specifi ed pressures for testing. Higher
pressure may cause gas valve failure.
Disconnect this unit and shutoff valve from the gas supply
piping system before pressure testing the supply piping system
with pressures in excess of 1/2 psig (3.48 kPa).
This unit must be isolated from the gas supply system by
closing its manual shutoff valve before pressure testing of gas
supply piping system with test pressures equal to or less than
1/2 psig (3.48 kPa).
P
ROPANE
G
AS
T
ANKS
AND
P
IPING
A gas detecting warning system is the only reliable way to de-
tect a propane gas leak. Rust can reduce the level of odorant
in propane gas. Do not rely on your sense of smell. Contact
a local propane gas supplier about installing a gas detecting
warning system. If the presence of gas is suspected, follow
the instructions on Page 3 of this manual.
All propane gas equipment must conform to the safety
standards of the National Board of Fire Underwriters, NBFU
