19
Field Supplied Drain
Drain the furnace and air conditioning coil if applicable, in
compliance with code requirements. In horizontal installa
-
tions, a field installed rubber coupling will allow the drain trap
to be removed for cleaning. The drain trap must be primed
before initial furnace start up. When an air conditioning coil
drain is connected to the field supplied furnace drain, it must
be vented with an open tee installed at a height no higher
than the bottom of the furnace collector box to prevent air
conditioning condensate from backing up into the furnace if
the common drain became blocked.
#3
#1
#2
#4
#5
#
6
#7
#8
#9
#10
#11
100 Degree
Elbow
Coupling
Figure 24
NOTE:
Hoses are model specific
and not all hoses will be shipped with all models.
E
DGES
OF
SHEET
METAL
HOLES
MAY
BE
SHARP
. U
SE
GLOVES
AS
A
PRECAUTION
WHEN
REMOVING
HOLE
PLUGS
.
WARNING
HIGH VOLTAGE !
T
O
AVOID
THE
RISK
OF
INJURY
,
ELECTRICAL
SHOCK
OR
DEATH
,
THE
FURNACE
MUST
BE
ELECTRICALLY
GROUNDED
IN
ACCORDANCE
WITH
LOCAL
CODES
OR
IN
THEIR
ABSENCE
,
WITH
THE
LATEST
EDITION
OF
THE
N
ATIONAL
E
LECTRIC
C
ODE
.
WARNING
WARNING
T
O
AVOID
THE
RISK
OF
INJURY
,
ELECTRICAL
SHOCK
OR
DEATH
,
THE
FURNACE
MUST
BE
ELECTRICALLY
GROUNDED
IN
ACCORDANCE
WITH
LOCAL
CODES
OR
,
IN
THEIR
ABSENCE
,
WITH
THE
LATEST
EDITION
OF
THE
N
ATIONAL
E
LECTRICAL
C
ODE
.
Upflow Model Installed Vertically
The trap and factory installed hoses remain as shipped.
The furnace drain may exit either the right or left side of the
furnace cabinet. Both sides of the cabinet have two .875”
diameter holes which can be used interchangeably for drain
and low voltage wiring purposes. If a higher drain exit is need
-
ed, a .875” diameter hole may be added in the area shown
in
Figure 25. Any unused cabinet opening must be sealed.
Do not allow drain hose to sag or trap water.
Side Cut-Out
12”
3”
Right side shown.
Acceptable
area for
drain hole.
Figure 25
Drain Exiting Right Side
1. Locate and Install the 45º pipe / hose drain coupling
from the outside of the cabinet (barbed end goes in the
cabinet) through hole in the right side of the cabinet
and secure with two field supplied #8 self-tapping
screws (see Figure 26).
2. Locate the long drain hose #3 and cut at line “A”.
3. Install large end of hose #3 to trap outlet and secure
with 1.25” clamp.
