Propane Gas Tanks And Piping - Maytag Amana MEC96 Series Installation Instructions Manual

Two-stage, fsp category iv direct or non direct vent air furnace
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Install a 1/8” NPT pipe plug fitting, accessible for
test gage connection, immediately upstream of the
gas supply connection to the furnace.
Always use a back-up wrench when making the
connection to the gas valve to keep it from turning.
The orientation of the gas valve on the manifold must
be maintained as shipped from the factory. Maximum
torque for the gas valve connection is 375 in-lbs;
excessive over-tightening may damage the gas valve.
Install a manual shutoff valve between the gas meter
and unit within six feet of the unit. If a union is
installed, the union must be downstream of the
manual shutoff valve, between the shutoff valve and
the furnace.
Tighten all joints securely.
Connect the furnace to the building piping by one of
the following methods:
Rigid metallic pipe and fittings.
Semi-rigid metallic tubing and metallic fittings.
Aluminum alloy tubing must not be used in
exterior locations. In order to seal the grommet
cabinet penetration, rigid pipe must be used to
reach the outside of the cabinet. A semi-rigid
connector to the gas piping may be used from
there.
Use listed gas appliance connectors in accordance
with their instructions. Connectors must be fully in
the same room as the furnace.
Protect connectors and semirigid 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.
The gas piping may enter the left or right side of the furnace
cabinet. The installer must supply rigid pipe long enough to
reach the outside of the cabinet to seal the grommet cabinet
penetration. A semi-rigid connector to the gas piping can be
used outside the cabinet per local codes. 1/2” NPT pipe and
fittings are required. For models with an “L” shaped man-
ifold, a 4 1/2” long nipple is required. For models with a
hook shaped manifold, a 2” long nipple is required.
A semi-rigid connector to the gas piping can be used outside
the cabinet per local codes. From the elbow, the length of
pipe and the fittings required will vary by the side chosen,
location of union and cabinet width. The union may be
placed inside or outside of the cabinet.
Manual Shut Off Valve
Alternate
Burners
Manifold
(upstream from
Gas Line
ground joint
Location
pipe union)
Gas Valve
*Ground
Joint
*Ground
Pipe
Joint
Union
Pipe
Union
Drip Leg
Grommet
in Standard
Gas Line
Hole
*NOTE: Union may be inside furnace cabinet where allowed by local codes.
UPFLOW
Figure 34
Gas Connections
WARNING
T
,
O AVOID THE POSSIBILITY OF EXPLOSION OR FIRE
NEVER USE A MATCH
.
OR OPEN FLAME TO TEST FOR LEAKS
Gas Piping Checks
Before placing unit in operation, leak test the unit and gas
connections.
Check for leaks using an approved chloride-free soap and wa-
ter solution, an electronic combustible gas detector, or other
approved testing methods.
NOTE: Never exceed specified pressures for testing. Higher
pressure may damage the gas valve and cause subsequent
overfiring, resulting in heat exchanger 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).
Isolate this unit from the gas supply piping system by closing
its external manual gas shutoff valve before pressure testing
supply piping system with test pressures equal to or less than
1/2 psig (3.48 kPA).

Propane Gas Tanks and Piping

WARNING
I
,
F THE GAS FURNACE IS INSTALLED IN A BASEMENT
AN EXCAVATED
,
AREA OR CONFINED SPACE
IT IS STRONGLY RECOMMENDED TO
CONTACT A PROPANE SUPPLIER TO INSTALL A GAS DETECTING WARNING
.
DEVICE IN CASE OF A GAS LEAK
S
,
INCE PROPANE GAS IS HEAVIER THAN AIR
ANY LEAKING GAS CAN
.
SETTLE IN ANY LOW AREAS OR CONFINED SPACES
P
,
ROPANE GAS ODORANT MAY FADE
MAKING THE GAS UNDETECTABLE
.
EXCEPT WITH A WARNING DEVICE
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
Page 30

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