Trane GEH 006 Manual page 10

Reversing Valve
A system reversing valve (4-way
valve) is included with all heating/
cooling units. This valve is piped to be
energized in the cooling mode to al-
low the system to provide heat if valve
failure were to occur. Once the valve is
energized for cooling, it will remain
energized until the control system is
turned to the OFF position, or a heat-
ing cycle is initiated.
Units with the cooling only option will
not receive a reversing valve. (See
Figure 15 for reversing valve).
Blower Motor
The 1/2 through 5-ton supply-air
(blower) motor is a multi-speed motor
with internal thermal overload protec-
tion. The motor bearings are perma-
nently lubricated and sealed. Standard
motors are rated from .20 ESP. Option-
al high static motors are rated from .40
to 1.40 ESP. All motors are factory
wired to the option selected. A high,
medium, and low speed tap is provid-
ed for field customization on all volt-
ages. The speed tap modification can
be made in the control box of the unit.
(See Figure 16 for blower motor).
Note: The 380, 415, 460 and 575
volt designs are provided in a dual
or three-speed version only. See
fan performance section for factory
ratings (Page 91).
The 12 1/2 through 25 ton GEV models
incorporate a belt driven motor selec-
tion into the design. The 12 1/2 and 15
ton units include a single fan assem-
bly, while the 20 and 25-ton units in-
clude 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 sys-
tem when the application requires
10
Features and
Benefits
extensive ductwork design. This is a
low cost alternative to purchasing, in-
stalling, and maintaining multiple
smaller tonnage units to meet the re-
quired air flow demand for the space.
Serviceability to the motor is made
through either of the two air-side ac-
cess doors for the horizontal configu-
ration, and through one air-side
access door for the 1/2 through 5-ton
vertical configuration. The motor and
blower wheel are removable by an or-
ifice ring mounted to the fan hous-
ing.
Access to the 12 1/2 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 need-
ed. (See Figure 17 for motor
accessibility).
Blower Housing
The blower housing is constructed of
non-corrosive galvanized steel. A fac-
tory-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 a 1-inch
thick (nominal) or 2-inch thick (nomi-
nal) disposable fiberglass option.
These filters include an average syn-
thetic dust weight arrestance of ap-
proximately 75%. This dust holding
capability includes a colorless, odor-
less adhesive to retain dirt particles
within the filter media after fiber con-
tact. (See Figure 18 for filter media)
Figure 15: Reversing valve
Figure 16: Blower motor (direct drive)
Figure 17: Motor accessibility
Figure 18: Filter media
WSHP-PRC001-EN