Amana MVC80 Installation Instructions Manual page 16

• 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.
–
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
General Furnace Layout
u i
pflow nStAllAtionS
When the gas piping enters through the side of the furnace,
the installer must supply the following fit 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.
Right side
gas entrance
(alternate)
Figure 8
When the gas piping enters through the left side of the furnace,
the installer must supply the following fittings (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 i
ounterflow 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 fittings
(starting at the gas valve):
• Close Nipple
• 90 Degree Elbow
• Straight Pipe to Reach Exterior of Furnace.
g p C
AS iping heCkS
Before placing unit in operation, leak test the unit and gas
connections.
T
O AVOID THE POSSIBILITY OF EXPLOSION OR FIRE
OR OPEN FLAME TO TEST FOR LEAKS
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 specified 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).
16
WARNING
,
NEVER USE A MATCH
.