Greensource CDi Series TW Model
Greensource CDi Series TW Model8733954853 (2020/04)
6 | Unit Installation
Subject to change without prior notice
UNIT INSTALLATION
This section contains information on the following:
LOCATION SELECTION
Install the unit in an indoor area that allows easy
access to the panels, and has enough room for
service personnel to perform maintenance or
repair. Provide sufficient room to make fluid,
electrical, and duct connection(s).
INSTALLATION
The TW series unit must be mounted level on a
vibration absorbing pad slightly larger than the
base to minimize vibration transmission to the
building structure, It is not necessary to anchor the
unit to the floor. (See Fig. 3.)
Fig. 3 Vibration pad
Piping
Supply and return piping must be as large as the
unit connections on the heat pump (larger on long
runs).
Flexible hoses should be used between the unit
and the rigid system to avoid possible vibration.
TW units are supplied with either a copper or
optional cupro-nickel Water to refrigerant Heat
Exchanger. Copper is adequate for ground water
that is not high in mineral content. (See Table #8,
Water Quality.)
In conditions anticipating moderate scale
formation or in brackish water a cupro-nickel heat
exchanger is recommended.
Both the supply and discharge water lines will
sweat if subjected to low-water temperature.
These lines must be insulated to prevent damage
from condensation.
All manual flow valves used in the system must be
ball valves. Globe and gate valves must not be used
due to their high-pressure drop and poor throttling
characteristics.
Ball valves should be installed in the supply and
return lines for unit isolation and unit water flow
balancing.
Subject Page
Location Selection
6
Installation
6
Piping
6
Electrical
7
Safety Devices and
the UPM Controller
8
Specific Application
Considerations
8
Post-Installation
System Checkout
12
NOTICE: These units are not approved for
outdoor installation; therefore, they must
be installed inside a structure in a
conditioned space. Do not locate in areas
that are subject to freezing.
NOTICE: Never use flexible hoses of a
smaller inside diameter than that of the
fluid connections on the unit.
Proper testing is required to ensure the well
water quality is suitable for use with water
source equipment. When in doubt, use
cupro-nickel. (See the Water Quality Table
on page #30.)
NOTICE: Never exceed the recommended
water flow rates as per AHRI ratings since
serious damage or erosion of the water-to-
refrigerant heat exchanger could occur.
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