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507656-01 7/2018
NOTE
- When the coil is connected directly with a
condensing furnace, the coil must be level from return end
to supply end. The front (access side) of the furnace may
be pitched downward up to 1 inch to accommodate a
½-inch pitched coil.
3. Secure the supply duct to the coil cabinet.
4. Refer to the instructions provided with the condensing
unit for leak testing, evacuating and charging
procedures.
Always check the entire system for
leaks before charging.
5.
Applications using CH35-60 D-width unit with
C-width furnace
— Figure 2 shows an application
that includes a D-width coil and a C-width furnace.
This application requires construction of an insulated,
field-supplied block‐off plate to cover the open space
on the coil housing.
SUPPLY AIR UNIT
FRONT
PLUMBING
CONNECTIONS
SUPPLY AIR
UNIT REAR
TEST HOLE
AIR FLOW
FIELD‐FABRICATED
INSULATED BLOCK-
OFF PLATE
Figure 2. D-Width Coil with C-Width Furnace
(Top View)
SUPPLY AIR UNIT FRONT
PLUMBING
CONNECTIONS
SUPPLY AIR UNIT REAR
AIR FLOW
TEST HOLE
SLOPE 1/2”
(13 MM)
90% GAS FURNACE
DRAIN
COIL DRAIN
SUPPLY AIR UNIT
FRONT
BACK
COIL
(SUPPLY AIR END VIEW)
AIR
FLOW
Figure 3. Left-Hand Air Discharge
COIL
FRONT
NOTE - Use of this orientation is acceptable for 80% AFUE furnaces.
Do not use this orientation for 90% condensing furnaces.
(SUPPLY AIR END VIEW)
SUPPLY AIR UNIT FRONT
PLUMBING CONNECTIONS
SUPPLY AIR UNIT REAR
TEST HOLE
SLOPE 1/2”
(13 MM)
COIL
DRAIN
SUPPLY AIR UNIT
SUPPLY AIR
UNIT FRONT
COIL
AIR FLOW
(Top View)
AIR
FLOW
Figure 4. Right-Hand Air Discharge
FIELD-PROVIDED SPACER
(6 IN.)
COIL
BACK
FRONT
SUPPLY AIR UNIT FRONT
PLUMBING CONNECTIONS
SUPPLY AIR UNIT REAR
TEST HOLE
SLOPE 1/2”
(13 MM)
COIL DRAIN
SUPPLY AIR
UNIT FRONT
(TOP VIEW)
AIR FLOW
90% GAS FURNACE
DRAIN
(SUPPLY AIR END VIEW)
AIR
FLOW
Figure 5. Right-Hand Air Discharge with Spacer
