8
Installation and checklist
Alternate return installation
If unit received is not as required with
return configuration, follow procedures
hereafter to easily alternate return
opening from left-hand return to right-
hand return and vice versa.
Step 7 Install side panel on the left
Step 1 Remove the filter board at unit
left side
Step 2 Remove the filter frame at unit
top side
Step 3 Remove the filter frame at unit
bottom side
Step 4 Remove the right side panel
Step 5 Install filter frame on the right
Step 6 Install filter
Alternate supply installation
Follow procedures hereafter to easily
alternate air supply, back supply to left
supply as shown.
Step 1 Cut off power source
Warning
Disconnect power source
before service, or severe body
hurt or death of personnel will
occur.
Step 2 Remove the fan motor wiring
plug
Step 3 Loosen the screw fixing fan
assemblies to the unit
Step 4 Remove the side panel on the
left
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