30
WSHP-PRC001-EN
Central Pumping System
Units that employ a central pumping
system contain single or dual pumps
to fulfill pumping requirements for the
entire building system.
The central system’s supply and re-
turn lines should be sized to handle
the required flow with a minimum
pressure drop.
The water-source heat pump (in this
case a high efficiency GEH) may in-
clude add-on accessories to help aid in
system balancing, acoustics and safe-
ty requirements. Some of these items
may be ordered from the factory, then
field installed. Many are provided by
the contractor.
Hose kits
are used to connect the
water supply and return line to the
water inlets and outlets. Trane of-
fers various hose kit combina-
tions to better facilitate
system flow balancing.
These flexible hoses also aid
in the reduction of vibration
between the unit and the rig-
id central piping system.
A two position isolation valve is
often applied to systems which in-
corporate variable frequency
pumping. This valve is capable of
stopping/starting water flow to the
unit, which in-turn reduces
the pumping requirements
for the entire system.
The unit’s (item 2) 3/4-inch
high
voltage
and (item 3) 1/2-inch
low
voltage
connections are located
on the left chamfered corner
of the unit. They are de-
signed to accept con-
duit.
A field supplied
line voltage dis-
connect
should be installed for
branch circuit protection. Check
local codes for requirements.
The central system
supply and
return lines
should be sized to
handle the required flow with a
minimum pressure drop.
Note: Pipe will sweat if low tem-
perature water is below the dew
point of the surrounding space.
Trane recommends that these
lines be insulated to prevent dam-
age from condensation when con-
denser loop is designed to be
below 60 F.
For acoustically sensitive areas, a
six-inch deep
fiberglass insula-
tion
is recommended to be field
installed below the horizontal unit.
This field supplied insulation
should be approximately twice the
footprint size of the unit. It pro-
vides sound damping of the unit
while in operation.
Application
Considerations
1
2
3
4
6
5
Summary of Contents for Axiom GEH006
Page 107: ...WSHP PRC001 EN 107 Control Wiring Basic 24V 1 PH 208V 60HZ 1PH ...
Page 108: ...108 WSHP PRC001 EN Control Wiring Deluxe 24V 3 PH 208V 60HZ 3PH ...
Page 109: ...WSHP PRC001 EN 109 Control Wiring Tracer ZN510 1PH 208V 60HZ 1PH ...
Page 110: ...110 WSHP PRC001 EN Dimensional Data Tracer ZN524 3PH 460V 60HZ 3PH ...
Page 123: ...WSHP PRC001 EN 123 Dimensional Data Front Return Back Supply 12 1 2 15 Ton ...
Page 124: ...124 WSHP PRC001 EN Dimensional Data Back Return Front Supply 12 1 2 15 Ton ...
Page 125: ...WSHP PRC001 EN 125 Dimensional Data Front Return Top Supply 12 1 2 15 Ton ...
Page 126: ...126 WSHP PRC001 EN Dimensional Data Back Return Top Supply 12 1 2 15 Ton ...
