Amana GUX-X Installation Instructions Manual page 16

When the gas piping enters through the right side of the
furnace (Figures 16 and 17) the installer must supply the
straight pipe to reach the exterior of the furnace.
Figure 16
Gas Inlet Through Furnace Right Side
(Except GUD)
Figure 17
Gas Inlet Through Furnace Right Side
(GUD Only)
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.
When the gas piping enters through the right side of the
furnace (Figure 18) the installer must supply the following
fittings (starting from the gas valve):
•
90 degree elbow.
•
1-1/2 inch close nipple.
•
90 degree elbow.
•
Straight pipe to reach exterior of furnace.
Gas Inlet Through Furnace Top Side
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.
GAS PIPING CHECKS
CAUTION
To prevent personal injury or property
damage due to fire, the following
instructions must be performed regarding
gas connections, pressure testing, location
of shutoff valve and installation of gas
piping.
• Before placing in operation, leak test the unit and
gas connections. To avoid the possibility of explo-
sion or fire, never use a match or open flame to test
for leaks. Never exceed specified pressures for
testing. Higher pressure may damage the gas valve
and cause overfiring, resulting in heat exchanger
failure.
• This unit and shutoff valve must be disconnected
from the gas supply piping system before supply
piping system pressure testing with test 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
Figure 18
(GUD)