Lennox CHX35 Series Installation Instructions Manual 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, field-supplied block-off plate to cover the
open space on the coil housing
COIL
BACK
SLOPE 1/2"
(13 MM)
(SUPPLY AIR END VIEW)
SUPPLY AIR UNIT REAR
AIR FLOW
(Top View)
SUPPLY AIR UNIT FRONT
SUPPLY AIR UNIT REAR
(TOP VIEW)
AIR FLOW
SUPPLY AIR UNIT FRONT
SUPPLY AIR UNIT
FRONT
COIL DRAIN
90% GAS FURNACE
DRAIN
FIGURE 3. Left-Hand Air Discharge
PLUMBING CONNECTIONS
AIR
FLOW
TEST HOLE
NOTE - Use of this orientation is acceptable for 80% AFUE furnaces.
Do not use this orientation for 90% condensing furnaces.
FIGURE 4. Right-Hand Air Discharge
TEST HOLE
AIR
FLOW
PLUMBING CONNECTIONS
FIELD-PROVIDED SPACER
90% GAS FURNACE
(6 IN.)
FIGURE 5. Right-Hand Air Discharge with Spacer
Page 4
FIELD FABRICATED
INSULATED BLOCK-
OFF PLATE
SUPPLY AIR
UNIT REAR
AIR FLOW
FIGURE 2. D-Width Coil with C-Width Furnace
TEST HOLE
AIR
FLOW
PLUMBING
CONNECTIONS
SUPPLY AIR UNIT
SUPPLY AIR
UNIT FRONT
SLOPE 1/2"
(13 MM)
SUPPLY AIR
UNIT FRONT
FRONT
COIL DRAIN
DRAIN
TEST HOLE
SUPPLY AIR UNIT
FRONT
SUPPLY AIR UNIT REAR
AIR FLOW
(Top View)
SUPPLY AIR UNIT FRONT
COIL
COIL
FRONT
(SUPPLY AIR END VIEW)
COIL
BACK
SLOPE 1/2"
(13 MM)
(SUPPLY AIR END VIEW)
PLUMBING
CONNECTIONS
COIL
DRAIN