4000-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
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SECTION 7: AIR HANDLER ASSEMBLY
For models 4024 - 4049, the burner and fan sections of the air handler are shipped as one piece. Filter
section and/or filter mix box can be mounted to air handler when requested.
For models 4054 - 4089, the burner and fan sections of the air handler are shipped as two pieces that
require field-assembly. To assemble, use the supplied hardware and bolt the fan section to the burner section
through pre-drilled holes. Supplied hardware must be torqued to recommended specifications on Table 1,
Page 8.
Caulk (provided by others) the sides, roof and bottom seams between the fan section and burner section.
See Page 33, Figure 7.1 through Page 35, Figure 22.
NOTE: After the equipment sections are set together (if shipped separately), connection of the electrical
conductors between the sections is required. The conductors are numbered on both ends. Join the
conductors like numbers. The quantity of conductors supplied varies with the selected options. In addition,
motor-supply conductors must be connected to the fan motor of model sizes 4054-4073. See Page 37,
Section 7.4.
Crush Hazard
Use proper lifting
equipment and
practices.
Falling Hazard
Use proper safety
equipment and prac-
tices to avoid falling.
Severe Injury Hazard
Use proper lifting
practices and equip-
ment.
Equipment and
accessories are
heavy.
Cut/Pinch Hazard
Wear protective gear
during installation,
operation and
service.
Edges are sharp.
WARNING
Failure to follow these instructions can result in death, injury or property damage.
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