PG92MSA: Installation, Start-up, Operating and Service and Maintenance Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
14
L12F019B
Fig. 15 – Knockout Removal
The remaining drain line can be constructed from field supplied 1/2-in.
CPVC or 3/4-in. PVC pipe, in compliance with local building codes. A
factory-supplied 1/2-in. CPVC to 3/4-in. PVC adapter is supplied in the
loose parts bag for use as required.
7. Install the adapter or connect the 1/2-in. CPVC pipe by sliding a
spring clamp over the open end of the grommet on the outside the
furnace casing.
8. Open the spring clamp and insert the long end of the adapter or the
1/2-in. CPVC pipe into the outlet stub on the drain tube.
9. Connect additional condensate piping to a code-approved drain, or
to a condensate pump approved for use with acidic furnace
condensate and compatible with mineral and vegetable oils, such as
canola oil.
Allow at least 1/4-in. per foot (20 mm per meter) of slope down and
away from the furnace in horizontal sections of drain line.
TIP FROM CONTRACTORS: Contractors have found that
temporarily removing the inducer assembly in upflow applications while
performing the steps, below, makes upflow left-side drain connections
easier.
For Left Side Condensate Drain Connection:
1. For left side condensate drainage, the drain line is routed from the
condensate trap, behind the inducer (upflow) or gas valve
(downflow) and out through the left side of the furnace casing. A
pre-formed 1/2-in. CPVC “Z-pipe” is provided with the furnace.
The Z-pipe is long enough to extend across the casing for drain
connections.
2. Locate the Z-pipe. Remove the pre-formed drain elbow and four
spring clamps from the loose parts bag.
3. The Z-pipe is connected to the condensate trap and the outside of
the furnace by modifying the formed rubber drain elbow as shown
in Fig. 17.
4. Remove the formed grommet from the rubber drain elbow by
cutting the elbow along the vertical line located about 1-3/8 in. (35
mm) away from the formed grommet. See Fig. 17. DO NOT
DISCARD THE FORMED GROMMET OR THE RUBBER
ELBOW. Both of these pieces will be used.
A220966
Top View
Drain Elbow “Z” Discharge Pipe for Left Side
Drain is Routed behind Inducer
A220967
Front View
Left Side Drain Pipe Orientation for Condensate
Discharge
NOTE: Remove Inducer Housing for easier access, if desired.
Fig. 16 – Drain Trap Connection and Routing
(Appearance may vary)
Assemble and route the drain line to the opposite side of the furnace as
detailed below:
5. Remove the inducer housing screws, disconnect harnesses, and set
inducer housing aside. See Fig. 15 for suggested knockout removal
technique.
6. Remove condensate trap.
7. Remove the knockout from the left side of the casing.
8. Pull the grommet through the casing from the outside of the unit
until it is seated in the knockout.
9. Assemble the Z-pipe, rubber elbow and condensate trap external to
the unit by securing the rubber elbow to the drain trap and the
Z-pipe with spring clamps.
10. Slide the spring clamp for the Z-pipe/grommet connection over the
Z-tube.
11. Adjust the Z-pipe orientation prior to final installation to ensure the
Z-pipe will be as horizontal as possible and NOT resting on any
sheet metal parts.
12. Align the Z-pipe with the long end of the grommet inside the
furnace and insert slightly. The angled end of the tube at the other
side of the casing should be facing the front of the furnace.
13. Slide a spring clamp over the end of the remaining rubber drain
elbow.
14. Re-attach the condensate trap with Z-pipe assembly. Make fine
adjustments to the Z-pipe orientation as needed to ensure the Z-pipe
is as horizontal as possible. Condensate trap screws should be
torqued to 17.5 +/- 2.5 in-lbs. Do NOT use power tools and torque
to a maximum of 20 in-lbs.
15. In both upflow and downflow orientations, the Z-pipe should NOT
be resting on any sheet metal parts.
16. Replace inducer housing. Inducer housing screws should be
torqued to 17.5 +/- 2.5 in-lbs. Do NOT use power tools and torque
to a maximum of 20 in-lbs.
CAUTION
!
CUT HAZARD
Failure to follow this caution may result in personal injury.
Sheet metal parts may have sharp edges or burrs. Use care and wear
appropriate protective clothing, safety glasses and gloves when
handling parts, and servicing furnaces.
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