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Accessory Items
Note:
The following equipment may be pur-
chased through the nearest Trane dis-
tributor.
! Water Regulating Valve Assembly:
The water regulating valve
assembly consists of a direct
acting valve and a reverse acting
valve. The direct acting valve
opens in response to an increase in
discharge pressure during the
cooling cycle. The reverse acting
valve opens in response to a
decrease in suction pressure
during the heating cycle. Water
regulating valves should be used
where low flow, and low or high
fluid temperature conditions could
occur.This option is beneficial
with open loop systems, but not
necessary.
! Motorized Water Valve for open
loop systems: The motorized water
valve is installed on the return line
of the system between the loop
and the loop pump module. This
isolation device is a much less
expensive and very effective
alternative. When the compressor
begins running, the valve will
open, allowing water to flow
through the unit. As the
compressor shuts down, the valve
slowly closes off. The main
purpose of the automatic device is
to prevent water hammer, by
keeping the pressure raised in the
loop system during off cycles.
! Electric Strip Heaters: If the ETL
listed strip heaters are used, they
can be installed directly inside the
TWE air handler. These heaters
are rated at 230 volts and provide
electric heat for both supplemental
and emergency heat requirements.
There are a number of heater
capacities available.
! Pump Module: The pump module
and the hose kit make a complete
self-contained pumping package
for the earth-coupled heat pump
system. These kits contain all the
necessary components for the
installation, operation and
maintenance of the water circuit of
a closed loop geothermal
application. Standard pump
module features include insulated
Grundfos pumps, insulated
cabinet, optional cast iron or
bronze pumps, 3-way brass valves
and the choice of a one or two
pump module.
! Hose Kits: The hose kits include
two brass, 1-inch male pipe thread
(MPT) by barb-fittings, two brass
90 degree 1-inch, MPT by barb-
elbows with pressure/temperature
ports and 10 feet of rubber hose
with 4 hose clamps.
! Sand Filter/Separator: A sand
filter/separator helps ensure clean
water for the water-to-refrigerant
heat exchanger. The recommended
strainer is 60 mesh or greater. The
strainer keeps particles and debris
from entering the system.
Miscellaneous Equipment