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

Page: 10 / 76

987MB: 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.
10
A11585A
A11585B
Fig. 8 – Downflow Trap Configuration
(Appearance May Vary)
Condensate Trap-Horizontal Orientation
When the furnace is installed in the horizontal right position, the
condensate trap will be initially located at the bottom left corner of the
collector box, as received from the factory. See the top image in Fig. 10 .
When the furnace is installed in the horizontal left position, the
condensate trap will be initially located at the top of the collector box, as
received from the factory. See the top image in Fig. 9 . In both cases, the
trap must be repositioned on the collector box for proper condensate
drainage. See the bottom images in Fig. 10 and Fig. 9 .
A field-supplied, accessory Horizontal Installation kit (trap grommet) is
required for all direct-vent horizontal installations (only). The kit
contains a rubber casing grommet designed to seal between the furnace
casing and the condensate trap, see Fig. 11 .
To Relocate the Condensate Trap:
• Remove the knockout in the casing for the condensate trap.
• Install the grommet in the casing when required for direct-vent
horizontal applications.
• Orient the furnace in the desired position.
• Allow for 2 in. (51 mm) of clearance underneath the furnace for the
condensate trap and drain line.
• Fig. 10 shows the condensate trap and tubing before and after
relocation in the horizontal right position.
• Fig. 9 shows the condensate trap and tubing before and after
relocation in the horizontal left position.
• Refer to the appropriate figure to begin the trap conversion.
• Refer to Condensate Drain section for information how to install the
condensate drain.
A11586
Fig. 9 – Horizontal Left Configuration
(Appearance May Vary)
A11278A
A11278B
Fig. 10 – Horizontal Right Trap Configuration
(Appearance May Vary)
Remove relief tube from relief
port on condensate trap.
Remove pressure switch tube from
pressure switch port.
Remove trap from
collector box.
Loosen clamp on inlet
to vent elbow.
Remove middle and bottom plugs.
DO NOT DISCARD.
Remove tube from
relief port.
7
9
Install plugs on
open ports on
collector box.
Connect relief tube to
port on collector box.
Rotate elbow to
desired position and
tighten clamp to
15 lb.-in.
Slide tube in stand-offs
to adjust length.
Trim excess tube.
Connect pressure switch
tube to port on collector box.
Attach condensate trap
with screw to collector
box.
Connect relief tube to
relief port on condensate
trap.
Align condensate trap
over middle and bottom
ports of collector box.
If alternate vent position
is required, loosen clamp
on vent elbow inlet.
Remove trap from
collector box.
Remove pressure switch tube
from port on collector box.
Remove relief tube
from relief port on
condensate trap.
Remove middle and right
plug from collector box.
DO NOT DISCARD
Remove relief tube
from port on collector
box.
Rotate elbow to
desired position and
torque clamp on inlet
15 lb.-in.
Slide relief tube in
stand-offs to adjust
length.
Attach condensate
trap to collector box
with screw.
Align trap over middle
and right-hand port on
collector box.
Install plugs in open
ports on collector box.
Connect relief tube to
port on collector box.
Trim excess tube.
Route pressure switch tube
underneath relief tube and
connect to port on collector box.
Connect relief tube to
relief port on condensate
trap.
Unconverted Factory Trap Configuration
As Viewed in the Horizontal Left Orientation
Horizontal Left Trap Configuration
Remove plug from
collector box.
DO NOT DISCARD.
If alternate vent position
is required, loosen clamp
on inlet of vent elbow.
Remove trap from
collector box.
Unconverted Factory Trap Configuration
As Viewed in the Horizontal Right Orientation
Attach condensate trap
to collector box with
screw.
Install plug in open
port on collector box.
Slide relief tube in
stand-offs to adjust length.
Vent elbow shown in alternate
orientation. Tighten clamp on
inlet to vent elbow 15 lb.-in.
Align trap over middle and
right-hand port on collector box.
Horizontal Right Trap Configuration