10
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.
Figure 10
Gas Inlet Through Furnace Bottom Side
(Upflow)
When the gas piping enters through the left side of the
furnace, the installer must supply the following fittings
(starting from the gas valve):
•
Straight pipe to reach the exterior of the furnace. See
Figures 11 & 12.
•
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.
Figure 11
Gas Inlet Through Furnace Left Side
(Upflow)
Figure 12
Gas Inlet Through Furnace Top Side
(Upflow)
The gas piping connections shown in Figures 10 and 12 are
for a furnace equipped for a right hand discharge (Figure
13). Adaptation for left hand discharge should be self
explanatory.
Figure 13
Horizontal Furnace (Right Hand Discharge)
Counterflow Installations
When the gas piping enters through the left side of the
furnace
, the installer must supply a straight pipe to reach
the exterior of the furnace (Figure 14).
Figure 14
Gas Inlet Through Left Side
(Counterflow)
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.
