3
Field-supplied
Plenum
Field
Coil
Support Shelf
Furnace
See
Table 1
A
1
3
⁄
16
″
1
1
⁄
16
″
2
1
⁄
4
″
1
⁄
2
″
6
″
19
3
⁄
16
″
(487)
(13)
(27)
(30)
(152)
(57)
A08336
Fig. 1 -- Correct Orientation of Coil Support on Furnace
Installation of Furnace Coils
Upflow Cased Coil Installation
NOTE
: On upflow installations where the indoor coil is placed in
an unconditioned space, a 6” (152 mm) wide piece of insulation
should be applied and wrapped around the outside of coil casing
and supply duct contact point.
1. Set coil in place on upflow furnace discharge air opening.
See Fig. 2.
2. When coil front width matches furnace front width, the coil
can be placed directly on furnace.
3. Ensure coil is level for proper condensate drainage. Do not
tip coil toward condensate drain. Coil enclosure need not be
fastened or screwed to furnace.
Supply
Upflow
Furnace
Downflow
Furnace
Evaporator
Coil
Return
Return
Supply
A05411
Fig. 2 -- Typical Coil Installation
NOTE
: When CNPVT/CNRVT (transition coils) are applied to
same width furnace, remove block--off plates at casing base by
removing 2 screws per plate from side of casing. See Fig. 3.
Block-Off
Plates
A05412
Fig. 3 -- Block--Off Plate Removal
TRANSITION MODEL COILS APPLIED CENTERED OVER
NARROW FURNACE
1. There is no transition required for this application.
2. Remove coil from packaging and place on top of furnace
with 1 5/8” (41 mm) overhang on both sides. See Fig. 4,
Alternative A.
3. Continue with normal installation practices. See Connect
Refrigerant Piping.
STANDARD MODEL COIL APPLIED CENTERED OVER
NARROW FURNACE WITH 2 1/4” (57 mm) MINIMUM
TRANSITION
1. Prepare transition, following recommended transition draw-
ing. See Fig. 5. Fabricate a 2 1/4” (57 mm) tall (minimum)
transition.
2. Place transition on top of gas furnace. See Fig. 4, Alternat-
ive B. Secure with sheet metal screws. Place coil on top of
transition. Make sure coil rests evenly on top of transition
and gas furnace.
3. Secure coil to transition using sheet metal screws.
4. Continue with normal installation practices. See Connect
Refrigerant Piping.
NOTE
: If coil (cased or uncased) is not being installed in the
standard orientation (front of coil matching front of furnace) then
coil must be raised 2 1/4” (57 mm) above furnace.
CNP
VP
/CNR
VP
