Figure 14
Gas Inlet Through Furnace Left Side
(Upflow)
Figure 15
Gas Inlet Through Furnace Top Side
(Upflow)
The gas piping connections shown in Figures 13 and 14
are for a furnace equipped for a right hand discharge.
Adaptation for left hand discharge should be self ex-
planatory.
Figure 16
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 17)
Figure 17
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.
When the gas piping enters through the right side of the
furnace, the installer must supply the following fittings
(starting at the gas valve):
• 90 degree elbow.
• Close nipple.
• 90 degree elbow.
• Straight pipe to reach exterior of furnace (Figure 18).
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.
Figure 18
Gas Inlet Through Right Side
(Counterflow)
"Left side" and "right side" above are as viewed for a
counterflow installation. Adaptation for horizontal airflow
should be self explanatory.
15