912SD: 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.
11
A11587
Fig. 9 – Downflow Trap Configuration
(Appearance may vary)
A11573
Fig. 10 – Horizontal Right Trap Configuration
(Appearance may vary)
A11574
Fig. 11 – Horizontal Left Configuration
(Appearance may vary)
A170135
Fig. 12 – Example of Field Drain Attachment
Remove relief tube from relief
port on condensate trap.
Remove the screw
that secures the trap
to the collector box and
remove trap.
Loosen clamp on inlet
to vent elbow.
Remove pressure switch tube from
front pressure switch and discard. A
new tube is shipped in the loose parts bag.
Remove tube from relief port.
Remove middle and bottom
plugs. DO NOT DISCARD.
Unconverted Factory Configuration as
Viewed in the Downflow Orientation
Install the two plugs
previously removed
on the open ports
of the collector box.
Connect relief tube
to port on collector
box.
Rotate elbow to
desired position and
tighten clamp to
15 lb.
ï
in.
Slide tube in stand
ï
offs
to adjust length.
Connect the new pressure switch
tube from Loose Parts bag to
port on front pressure switch.
Route tube through inducer
stand
ï
offs to adjust position
of the tube.
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.
4
5
Downflow Trap Configuration
Remove plug from
collector box.
DO NOT DISCARD.
If alternate vent position
is required, loosen clamp
on inlet of vent elbow.
Remove the screw that secures
the trap to the collector box and
remove trap.
Unconverted Factory Configuration
As Viewed in the Horizontal Right Orientation
Attach condensate
trap with screw to
collector box.
Slide relief tube in stand
ï
offs
to adjust length.
Vent elbow shown in alternate
orientation. Tighten clamp on
inlet to vent elbow 15 lb.
ï
in.
Align trap over middle and
right
ï
hand port on collector box.
NOTE: Remove knockout in
casing before re
ï
installing the
condensate trap.
Install plug on
open port of
collector box
Horizontal Right Trap Configuration
If alternate vent position
is required, loosen clamp
on vent elbow inlet.
Remove relief tube
from port on collector
box.
Remove the screw that secures the
condensate trap to the collector box
and remove trap.
Remove relief tube from
relief port on condensate
trap.
Remove front pressure
switch tube and discard.
A new tube is shipped in
the Loose Parts bag.
Remove middle and right
plug from collector box.
DO NOT DISCARD.
5
6
Unconverted Factory Trap Configuration
As Viewed in the Horizontal Left Orientation
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 with screw to
collector box.
Align trap over middle
and right-hand port on
collector box.
Install two plugs previously
removed in open ports on
collector box.
Connect relief tube to port
on collector box.
Connect the new pressure switch
tube from Loose Parts bag to port
on front pressure switch.
Route pressure switch tube
underneath relief tube and
connect to port on
collector box.
Connect relief tube to relief
port on condensate trap.
Horizontal Left Trap Configuration
9
7
8
NOTE: Remove knockout in
casing before re-installing the
condensate trap.
Air gap here
Open standpipe
LQKLJK
PLQLPXP
for coil
or
humidifier drain
TEE
(1/2” CPVC to 3/4” PVC
adapter from loose parts bag.)
To open drain
&RLORUKXPLGLILHUGUDLQ
ZKHQXVHG
+
+
+
Condensing
Furnace
-
-
- -
-
ÄÄÄÄÄÄÄÄÄÄ
ÄÄÄÄÄÄÄÄÄÄ
ÄÄÄÄÄÄÄÄÄÄ
ÄÄÄÄÄÄÄÄÄÄ
ÄÄÄÄÄÄÄÄÄÄ
ÄÄÄÄÄÄÄÄÄÄ
ÄÄÄÄÄÄÄÄÄÄ
Evaporator Coil
+ + +
< +
< +
< +
+
Blower
-
3/4” PVC
3/4
3/4
3/4
3/4
+
= Positive pressure
< +
= Pressure lower than areas with
+
ï
= Negative pressure
+
3/4” PVC
DIRECT
IO
N
OF
AIRF
L
O
W
+
+
+
3/4
Open standpipe
LQKLJKPLQLPXP
Air gap required when
another drain is connected
to furnace drain.
+
TEE
(1/2” CPVC to 3/4” PVC
adapter from loose parts bag.)
+
+
+
Condensing
Furnace
ï
ï
ï ï
ï
Evaporator Coil
+
+
+
< +
< +
< +
+
Blower
ï
3/4” PVC
3/4
1/2”
CPVC
or
larger*
+
= Positive pressure
< +
= Pressure lower than areas with
+
( = Negative pressure
+
3/4” PVC
DIRECTION
OF
AIRFLOW
+
+
+
+
3/4
3/4
3/4
3/4
Open standpipe
(Optional when coil drain is
not connected to furnace
drain.)
Recommend “T” fitting
standpipe of same
diameteror larger
H[WHQGLQJXSZDUG
ZLWKPLQLPXPLQFK
high
+
+
+
Condensing
Furnace
-
-
- -
-
Evaporator
ÄÄÄÄÄÄÄÄÄ
Coil
ÄÄÄÄÄÄÄÄÄ
+
ÄÄÄÄÄÄÄÄÄ
+
ÄÄÄÄÄÄÄÄÄ
+
ÄÄÄÄÄÄÄÄÄ
ÄÄÄÄÄÄÄÄÄ
+
ÄÄÄÄÄÄÄÄÄ
< +
< +
< +
+
Blower
-
3/4” PVC
3/4
3/4
3/4
3/4
3/4
3/4
+
= Positive pressure
< +
= Pressure lower than areas with
+
ï
= Negative pressure
3/4” PVC
Open standpipe
(Optional when coil drain is
not connected to furnace
drain.)
TEE
(1/2” CPVC to 3/4” PVC
adapter from loose parts bag.)
DIRECTION
OF
AIRFLOW
