SYSTEM OPERATION
24
6. Using the two sheet metal screws provided in the cabinet,
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.
Hose #4
Hose #5
Hose #4
Hose #2
Figure 30
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 un-used 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 100÷ 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 100÷
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.
Electrical Connections
HIGH VOLTAGE !
T
O
AVOID
THE
RISK
OF
ELECTRICAL
SHOCK
,
WIRING
TO
THE
UNIT
MUST
BE
POLARIZED
AND
GROUNDED
.
WARNING
HIGH VOLTAGE !
T
O
AVOID
PERSONAL
INJURY
OR
DEATH
DUE
TO
ELECTRICAL
SHOCK
,
DISCONNECT
ELECTRICAL
POWER
BEFORE
SERVICING
OR
CHANGING
ANY
ELECTRICAL
WIRING
.
WARNING
L
ABEL
ALL
WIRES
PRIOR
TO
DISCONNECTION
WHEN
SERVICING
CONTROLS
. W
IRING
ERRORS
CAN
CAUSE
IMPROPER
AND
DANGEROUS
OPERATION
. V
ERIFY
PROPER
OPERATION
AFTER
SERVICING
.
CAUTION
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.
115 Volt Line Connections
Before proceeding with electrical connections, ensure that
the supply voltage, frequency, and phase correspond to that
specified on the unit rating plate. Power supply to the furnace
