SYSTEM OPERATION
24
COUNTERFLOW MODEL INSTALLED VERTICALLY
The furnace drain may exit the right or left side of the furnace
cabinet (left side preferred) Trap and factory installed hoses
remain as shipped if the drain will exit the left side of the
cabinet. Draining from the right side requires re-location of
the trap to outside the cabinet.
DRAIN EXITING LEFT SIDE
1. Install a field supplied rubber coupling secured with a 1
¼” clamp to enable removing the trap for future cleaning.
Alternately, a PVC fitting may be glued on the trap outlet.
2. Install drain per local and National codes.
DRAIN EXITING RIGHT SIDE
Figure 27
1. Remove hose clamps and hoses from trap.
2. Remove trap.
3. (Draining the Vent Elbow) Insert the non-grommet end
hose #10 into the cabinet back drain hole. Insert a
coupling into the drip leg of the vent-drain elbow and
secure with a silver clamp. Secure hose #10 on vent-
drain elbow barb fitting with a silver clamp.
4. (Draining the Collector Box) Insert non-grommet end of
hose #9 into the cabinet front drain hole and secure on
collector box drain port with a silver clamp.
5. Mate the drain trap inlets to the hoses and secure with
silver clamps.
6. Line up the trap mounting holes with the pre-drilled holes in
the furnace and secure with 2 screws removed in step 2.
7. Refer to Field Supplied Drain section for instructions on
field supplied / installed drain on outlet of furnace trap.
COUNTERFLOW MODEL INSTALLED HORIZONTALLY
WITH RIGHT SIDE DOWN
Minimum 5
½
" clearance is required for the drain trap beneath
the furnace.
NOTE: For horizontal installations, some of the required hoses
are found in the factory-installed hose assemblies. Remove
the hose clamps to obtain the respective hoses needed for
installation, and install per the following directions.
Hose #8
Hose #7
Figure 29
1. Remove the drain trap and factory installed drain tube
assemblies.
2. Remove two 1” plugs from right side of cabinet
3. (Draining the Collector Box) From outside the cabinet,
insert the non-grommet end hose #7 into the back
drain hole and secure to collector box drain port using
a silver clamp.
4. (Draining the Vent Elbow) Insert the straight barbed
coupling into the vent – drain elbow drip leg and secure
with a red clamp.
5. From outside the cabinet, insert the non-grommet end
of hose #8 into the front cabinet drain hole and secure
on the vent - drain elbow barb fitting using a red clamp.
6. Using the two sheet metal screws provided in the cab
-
inet, secure the trap to the furnace.
7. Refer to Field Supplied Drain section for instructions on
field supplied / installed drain on outlet of furnace trap.
COUNTERFLOW MODEL INSTALLED HORIZONTALLY
WITH LEFT SIDE DOWN
* Also see Front Cover Pressure Switch Tube Location on
page 9.
Minimum 5
½
" clearance is required for the drain trap beneath
the furnace.
