22
Counterflow Model Installed Horizontally with
Left Side Down (See Figure 33)
*Also see Front Cover Pressure Switch Tube Location on
page 11.
Minimum 5 1/2” 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.
1. Remove the factory installed drain trap and hose
assemblies. Leave the 100° elbow inserted and
clamped in the vent-drain elbow.
2. Remove two 1”plugs from left side of cabinet
3. (Draining the Collector Box) Remove the cap from
the left side of the collector box drain port (bottom in
horizontal left position) and install it on right side drain
port.
4. Place radius end of hose #4 (factory installed) on
the collector box drain port and secure with a silver
clamp.
5. Insert hose #2 from outside the cabinet in the front
drain hole.
6. Connect hose #4 & hose #2 together using a straight
barbed coupling and two gold clamps (factory
installed).
7. (Draining the Vent Elbow) Remove rubber plug from
vent – drain elbow side port.
8. The unused vent-drain elbow drip leg port must
be plugged to prevent flue gases from escaping.
Insert rubber plug removed in step 7 into the
100°elbow. (Inserting a blunt tool such as a 3/16’’
Allen wrench into the center of the rubber plug will
stretch the plug and allow complete insertion)
9. Place radius end of hose #4 on the side port of vent –
drain elbow and secure with a gold clamp.
10. Insert a ½” diameter PVC pipe (factory installed) into
hose #4 and secure with a gold clamp.
11. Insert the non-grommet end of hose #5 (factory
installed) from outside the cabinet in the back drain
hole.
12. Insert 100º elbow in hose #5 and secure with a red
clamp.
13. Locate hose #4 and cut a cut off a 4” straight section
and discard the radius end.
14. Connect the 4” straight section of hose #4 to the 100º
elbow and the PVC pipe and secure with red clamps.
15. Connect the hoses to the trap inlets and secure
with silver clamps, drain trap outlet must point to the
original bottom of the furnace.
16. Using the two sheet metal screws provided in the
cabinet, secure the trap to the furnace.
17. Refer to Field Supplied Drain section for instructions
on field supplied / installed drain on outlet of furnace
trap.
Hose #4
Hose #5
Hose #4
Hose #2
Figure 33
ELECTRICAL CONNECTIONS
Wiring Harness
The wiring harness is an integral part of this furnace. Wires
are color coded for identification purposes. Refer to the
wiring diagram for wire routings. If any of the original wire
as supplied with the furnace must be replaced, it must be
replaced with wiring material having a temperature rating of
at least 105° C. Any replacement wiring must be a copper
conductor.
WARNING
HIGH VOLTAGE
To avoid the risk of electrical shock, wiring
the unit must be polarized and grounded.
WARNING
HIGH VOLTAGE
To avoid personal injury or death due to
electrical shock, disconnect electrical power
before servicing or changing any electrical
wiring.
CAUTION
Label all wires prior to disconnection when servicing
controls. Wiring errors can cause improper and dangerous
operation. Verify proper operation after servicing.
