R
Features and
Benefits
WSHP-PRC003-EN
14
Blower Motor: 1/2 to 5 ton
The supply-air (blower) motor is a
multi-speed motor with internal ther-
mal overload protection. The motor
bearings are permanently lubricated
and sealed.
All motors are factory wired to the
option selected. A high, medium, and
low speed tap is provided for field cus-
tomization on most voltages. The speed
tap modification can be made in the
control box of the unit.
See Figure 15
for blower motor.
Note: The three-phase designs are pro-
vided in a dual or three-speed version
only. See fan performance section for
factory ratings.
Serviceability to the motor is made
through either of the two air-side
access doors for the horizontal configu-
ration, and through one air-side access
door on vertical configuration. The
motor and blower wheel are removable
by an orifice ring mounted to the fan
housing.
Blower Motor: 6 to 20 ton
A belt driven motor selection powers
the fan for the 6 through 20 ton dual
circuit units. The 6 through 12-1/2 ton
units include a single fan assembly. The
15 and 20-ton units include dual fan
assemblies. Because the motor sheave
and the motor base are adjustable in
the field, a greater variation in external
static pressures are available.
The large tonnage units are capable of
providing 0 ESP to 3.0 ESP allowing a
higher static ductwork to be applied on
the mechanical system when the appli-
cation requires extensive ductwork
design. This is a low cost alternative to
purchasing, installing, and maintaining
multiple smaller tonnage units to meet
the required air flow demand for the
space.
Access to the 6 through 25 ton units is
made through the back of unit by way
of two panels, and/or through a side
access panel if adjustment to the motor
belt or motor base are needed.
Blower Housing
The blower housing is constructed of
non-corrosive galvanized steel. A facto-
ry-mounted orifice ring is provided for
ease of motor serviceability on the 1/2
through 5-ton direct drive units.
All air-side panels are interchangeable
with one another for ease of field con-
vertibility of the supply-air on the GEH
model.
Air-Side Filter
The air-side filter incorporates several-
fiberglass options. These filters include
an average synthetic dust weight
arrestance of approximately 75%. This
dust holding capability includes a color-
less, odorless adhesive to retain dirt
particles within the filter media after
fiber contact.
Air-to-Refrigerant Coil
The air-to-refrigerant heat exchanger is
constructed of staggered copper tubes
with die-formed corrugated lanced alu-
minum fins. The fins are then mechani-
cally bonded to the tubes through
expansion.
The coil is placed internal of the unit
design for the GEH model to provides
an optional dual filtration application.
With dual filtration to the GEH unit,
maintenance to the filter is significantly
less than with a single filtration system.
This design also offers maximum flexi-
blity of the supply and return air config-
urations.
The maximum working pressure for
both the GEH and GEV coils is 450 psig.
It is designed for maximum capacity
with an additional benefit of physical
unit size reduction.
Figure 15: 1/2 to 5-ton blower motor
Figure 16: 6 to 20-ton blower motor
and fan belt assembly.
