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Step 4: Setting the Unit
Construct a platform for the fan coil unit, as shown in
Figure 2.13. The platform can be constructed of 2 x 4 x 4
(minimum), 2 x 6, 2 x 8 and 2 x 10 lumber, as necessary
to achieve proper pitch of 1/4" per foot for the condensate
drain line. Figure 2.12 shows the approximate normal
allowable run of condensate piping as a function of the
framing lumber used for platform construction. The
platform covering should be 1/2" plywood minimum.
Attach vibration isolation pads (supplied inside fan coil
unit) to platform covering as shown in Figure 2.13.
Secure the platform to the joist or floor, depending on
location selected for the fan coil unit. Make sure platform
is level.
For locations where the fan coil unit will be suspended,
suspend platform from overhead by 1/4" threaded rods.
NOTICE: Allow room on sides for servicing.
For installations with a return air box and return air duct,
set fan coil unit on the platform with the elliptical
opening facing in the direction of the return air box. DO
NOT let the supply air plenum adaptor support the
weight of the unit.
Do not secure the unit to the platform, as the weight of
the unit will hold it in position.
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