Trane GEH 006 Manual page 142

Orifice Ring
Removal of the motor and fan wheel
for the 1/2 through 5-ton units shall be
made with the assistance of a factory
provided orifice ring device. This de-
vice shall attach the wheel and motor
to the fan housing in one assembly
providing single side service access.
Water Regulating Valve
Assembly (option)
The water regulating valve assembly
shall consist of a direct acting valve
and a reverse acting valve. The direct
acting valve shall open in response to
an increase in discharge pressure dur-
ing the cooling cycle. The reverse act-
ing valve shall open in response to a
decrease in suction pressure during
the heating cycle. Water regulating
valves shall be used where low flow,
or low or high fluid temperature condi-
tions exist. This accessory shall be
used with open-loop systems.
Economizing Coil (option)
The waterside economizing package
shall be an external unit accessory
pre-piped and pre-wired ready for
turn-key installation to the unit. The
economizing coil shall be designed to
perform with the WSHP at unit mea-
sured flow rate of 80.6 F DB/66.2 F WB
with 45 F EWT.
All hydronic coils shall be of 3/8"
(12 1/2-20 ton units), 1/2" (25 ton unit)
or 5/8" (1/2 through 5 ton unit) copper
and aluminum plate fin combination.
All coils shall be proof and leak tested
from the manufacturer. The proof test
shall be performed at 1.5 times the
maximum operating pressure and the
leak test at the maximum operating
pressure.
A dual sloped non corrosive drain pan
shall be easily accessible and clean-
able for the hydronic economizing
coil.
An electronic two-position, 3-way
valve shall meter water flow to the
economizing coil during the econo-
mizing mode. It shall be factory set to
energize the economizing mode at
55 F, while simultaneously halting me-
chanical operation of the compressor.
142
Mechanical
Specifications
Hanging brackets with rubber isola-
tion shall be provided for the horizon-
tal version of the economizing coil
option. The bracket design shall be the
same throughout the equipment.
The economizer for the vertical config-
uration shall be field attached to the
equipment.
Electric Heat (option)
Boilerless control electric heat shall be
factory wired and tested.
For the 1/2 through 5 ton equipment,
the boilerless control option shall be
composed of a nichrome open wire
coil designed for 2-kW per unit ton. It
shall consist of a single stage of elec-
tric heat used as a primary heating
source when compressor lockout has
occurred due to the entering water
temperature falling below 55 F with an
adjustable range between 25 F to 60 F.
All power connections to the electric
heat shall be made in the equipment's
control box.
For the 12 1/2 through 25 ton equip-
ment, the boilerless control option
shall be composed of a controls inter-
face for a field provided boilerless or
supplemental electric heat selection.
The heater for this model shall be
placed external to the equipment by
the contractor for ease of installation.
All power connections for the electric
heater will be completely separate
from the unit for field supplied electric
heat.
Hot Gas Reheat (option)
Dehumidification shall be provided
through a hot gas reheat option. The
coil shall consist of 3/8"/1/2" copper
tubes mechanically expanded into
evenly spaced aluminum fins. All coils
shall be proof and leak tested. The
proof test must be performed at 1.5
time the maximum operating pressure
and the leak test performed at the
maximum operating pressure.
Ball Valves (option)
Ball valves shall be field installed be-
tween the unit and the supply and re-
turn lines of the loop to stop water
flow to the unit in a maintenance or
service situation.
Motorized Water Valve (option)
When extreme fluid temperature con-
ditions do not exist with an open loop
system, a motorized water valve shall
be applied to each water-source heat
pump. The motorized valve shall stop
flow to the unit, causing pressures to
rise. This rise in pressure will hault
pump operation to provide greater en-
ergy savings of the entire system.
Pump Module (option)
The pump module shall be a complete
self contained pumping package for
an earth-coupled heat pump system.
The module shall consist of a single,
1/6-HP bronze pump, and a brass
3-way shut-off valve. These kits shall
contain the necessary components for
the installation, operation, and main-
tenance of the water circuit of a
closed-loop distributed pumping ap-
plication.
Hoses (option)
Hoses shall consist of a stainless steel
outer braid with an inner core of tube
made of a nontoxic synthetic polymer
material. The hoses shall be suitable
for water temperatures ranging be-
tween 33 F and 211 F without the use
of glycol.
Automatic Flow Devices (option)
The automatic flow kit shall contain a
Hays Mesurflo® automatic flow con-
trol valve, two ball valves, two flexible
hoses, a high flow Y-strainer, and may
include a strainer blow-down and var-
ious other accessories.
The automatic flow control valve shall
be factory set to a rated flow, and shall
automatically control the flow to with-
in 10% of the rated value over a 40 to 1
differential pressure, operating range
(2 to 80 PSID). Operational tempera-
ture shall be rated from fluid freezing,
to 225-degrees F. The valve body shall
be constructed from hot forged brass
UNS C37700 per ASTM B-283 latest re-
vision. For more information pertain-
ing to the automatic balancing hose
kits, see literature documentation
WSHP-SLB005-EN.
WSHP-PRC001-EN