GRW
Installation
5
SolutionAirGroup.com
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GRW - Manual
Rigging
WARNING
Never lift in windy conditions. Use properly-sized
cables, chains, or slings only as shown. Each cable,
chain, or sling must be capable of supporting the
weight of the entire unit or component. Adjust cable,
chain, or sling length for an even lift. Other lifting
arrangements may damage unit or component. Failure
to properly lift unit or component may result in death
or serious injury.
NOTE:
All GRW units are designed to be lifted from the base.
Each section of the unit is provided with lifting points at
each corner and sometimes at intermediate points.
Duct Connections
On outdoor units with ducting passing down through the
curb, the ducting will be installed prior to unit placement
and attached to the curb. For all other duct connections,
the ductwork will be connected to the unit casing using
sheet metal screws by the installing contractor. Unless
indicated on the submittal drawings, the weight of the
ducting should not be placed directly on the unit. The
installing contractor should provide an external means to
carry the duct weight.
Access panels in the ducting near the unit are
recommended. Where no access to the unit inlet or
discharge section is provided as part of the unit (for
example an access door in the unit), access panels are
strongly recommended for inspection and service.
Blower or Fan
GRW units include direct plenum fans. The motor, fan,
frame, and mounts should be visually inspected before
initial start-up and at every fan service.
The blower/fan and motor are aligned before shipping
from the factory, shipping and or mounting may result
in misalignment, proper motor fan alignment should be
checked and adjustments should be made, if required, prior
to unit start up.
GRW units come equipped with variable frequency drives
for speed adjustment. The unit controller allows a broad
range of blower speeds to accommodate necessary field
balancing, see the controller manual for directions on
adjustment.
If the blower can not be properly balanced using the
controller settings, please contact SolutionAir for further
instructions.
Variable Frequency Drive (VFD)
Variable frequency drives are used to control the speed of
the motor and fan. Fan speed is controlled either with a set
point, or with a controlling signal. Refer to the submittal
for control and wiring specifics. For specifics regarding
the VFD supplied with this unit, refer to the attached
documentation.
Final Assembly
Before proceeding with the electrical installation, remove
all shipping braces (such as fan shipping brackets), packing,
etc.