17
Earth Coupled
Application
Ball valves should be installed
in the supply and return lines
for unit isolation.
Flexible hoses may be used
to connect the water supply
and return lines to the water
inlets and outlets. These hoses
reduce possible vibration
between the unit and the rigid
system.
Note: Hoses and or pipes
should be braided stainless
steel, and sized suitable for the
system’s water pressure and
flow rate.
Load side connections are
used to supply the terminal
device.
The sound attenuation pad
should be slightly oversized for
the unit. This field supplied
product is recommended for
sound absorption of unit.
The low voltage control con-
nection provided on the unit is
large enough for attaching con-
duit.
The ground loop pump mod-
ule is designed for circulating
commercial loops that require
a maximum flow rate of 20
gpm.
The line voltage disconnect
should be installed for branch
circuit protection. The unit is
supplied with an opening for
attaching conduit.
All polyethene pipe in the
closed loop design should be
insulated to eliminate the risk
of sweating.
Distributed
Pumping
System
Application
Considerations
General
A distributed pumping system con-
tains either a single or dual pump
module connected directly to the
units supply and return source side.
This design requires individual
pump modules specifically sized for
each water source heat pump. Cen-
tralized pumping is not required.
See Figure 12 for a distributed
pumping installation.
Figure 12: Distibuted pumping installation
8
6
7
3
5
4
2
1
