Bryant 987MB Installation, Start-Up, Operating And Service And Maintenance Instructions page 13

987MB: Installation, Start-up, Operating and Service and Maintenance Instructions
Fig. 15 – 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 knock-out from the left side of the casing. See
for suggested knockout removal technique.
6. From the outside of the casing, insert the angled end of the Z-pipe
through drain hole in the left side of the casing and behind the
inducer or gas valve. Allow the Z-pipe to temporarily rest on the
blower shelf (upflow) or burner box (downflow). (NOTE: When
the inducer housing has been removed to ease installation in upflow
applications, this step is not needed.)
7. After inserting the Z-pipe through the casing, slide a spring clamp
over each end of the Z-pipe.
Fig. 16 – Modify Rubber Drain Elbow
8. From inside the casing, insert the short end of the formed grommet
cut from the rubber drain elbow through the 7/8-in. drain knockout
in the casing.
9. Pull the grommet through the casing from the outside until it is
seated in the knockout.
10. 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.
11. Slide a spring clamp over the end of the remaining rubber drain
elbow.
12. Attach the drain elbow to the angled end of Z-pipe and the drain
trap outlet stub. Adjust the length of Z-pipe inserted into the
grommet at the opposite side of the furnace as necessary for proper
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
fit and positioning. In both upflow and downflow orientations, the
Z-pipe should NOT be resting on any sheet metal parts.
13. Secure the rubber elbow to the drain trap and the Z-pipe with spring
clamps.
14. Secure the grommet to the Z-pipe with the spring clamp.
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.
15. 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.
16. 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.
17. 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.
A170128
The field-supplied, accessory horizontal drain trap grommet is ONLY
REQUIRED FOR DIRECT VENT APPLICATIONS. It is NOT
Fig. 14
required for applications using single-pipe or ventilated combustion air
venting.
TIP FROM CONTRACTORS: When installing the furnace
horizontally, use the entire drain elbow (that is, do NOT cut as shown in
Fig. 16 to connect the trap to the drain line. This helps to prevent bumps
and shocks to the drain line from damaging the furnace drain trap. Avoid
misalignment of the drain pipe which may cause kinks in the elbow.
Horizontal Orientation
1. The condensate trap outlet extends 2-in. (51 mm) below the furnace
casing. Leave enough clearance between the furnace and the
furnace platform for the trap.
2. To allow for servicing the trap, the condensate drain elbow in the
loose parts bag can be used to make a coupler to allow for future
service of the condensate trap and drain line.
3. Remove the knock-out for the condensate trap in the side of the
casing.
4. Install the drain trap grommet in the casing if required for
direct-vent applications. If necessary, remove the trap, install the
grommet and re-install the trap.
5. Remove the pre-formed rubber drain elbow, and two spring clamps
from the loose parts bag.
A11581
6. Connect the full or modified elbow and/or grommet to the outlet of
the condensate trap with one spring clamp. Avoid misalignment of
the drain pipe which may cause kinks in the elbow or grommet.
7. 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.
8. Install the adapter or connect the 1/2-in. CPVC pipe by sliding a
spring clamp over the open end of the elbow or grommet on the
outside the furnace casing.
9. 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.
10. Connect additional condensate piping to a code-approved drain, or
to a condensate pump approved for use with acidic furnace
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NOTICE
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