Page 4
NOTE – When the coil is connected directly with a con-
densing 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 CHX35-60 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, eld-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)
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
(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
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
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