FWR/FWT 10
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3
Temtrol, Inc
.
®
Manufacturers of ….. Customized Air Handling Units
(A) GENERAL DESCRIPTION
The
Temtrol FANWALLTechnology
®
is a fan-array approach to air handler design that uses several
smaller fans to replace one larger fan, providing design flexibility, reducing maintenance costs, and increasing
energy savings.
A1.
FWR – Fanwall Retrofit – Field Installed Fan Cubes
A2.
FWT – Fanwall – Factory Installed Fan Cubes/Array
(B)
STORAGE
(1)
Should storage of FWR/FWT cubes be required caution should be
taken to set FWR/FWT cubes indoors in a clean location to protect
motor, fans, coplanar and etc., from excessive dust. Also avoid
storage in location where children play and/or public access. If
units are to be stored for an extended period of time the following
maintenance procedures must be performed:
d. Manually rotate motor/wheel monthly.
(2)
A complete fan wheel/motor spare assembly storage requirements for motors and generators
that will not be placed in service for at least six months from date of shipment. Improper
motor storage will result in seriously reduced reliability and failure. An electric motor that does
not experience regular usage while being exposed to normally humid atmospheric conditions
is likely to develop rust in the bearings or rust particles from surrounding surfaces may
contaminate the bearings. The electrical insulation may absorb an excessive amount of
moisture leading to the motor winding failure.
a. A wooden crate “shell” should be constructed to secure the motor during
storage.
This is similar to an export box but the sides & top must be secured to the
wooden base with lag bolts (not nailed as export boxes are) to allow opening
and
reclosing many times without damage to the “shell”.
Minimum resistance of motor winding insulation is 5 Meg ohms or
the calculated minimum, which ever is greater. Minimum resistance
is calculated as follows:
Rm = kV + 1
where: (Rm is minimum
resistance to ground in Meg
−
Ohms and kV is rated nameplate
voltage defined as Kilo
−
Volts.) Example: For a 480VAC rated motor
Rm =1.48 meg
−
ohms (use 5 MÙ). For a 4160VAC rated motor Rm =
5.16 meg
−
ohms.
b. Storage Preparation:
1. Some motors have a shipping brace attached to the shaft to prevent
damage during transportation. The shipping brace, if provided, must be
removed and stored for future use. The brace must be reinstalled to hold
the shaft firmly in place against the bearing before the motor is moved.
FWR
FWT
Complete fan wheel/motor
spare assembly
FWR/FWT Cube
