CVHE-SVN02D-EN
18
EarthWise Purge
Requirements Purge
Installation
For certain CenTraVacs, the purge
system is not mounted on the chiller
when it ships. For 800-ton heat
recovery chillers and 1250 and 1400
ton chillers with auxiliary
condensers, the EarthWise Purge is
shipped in a separate container that
is secured to the chiller shipping
skid.
Install the purge system in
accordance with the following
instructions.
1. Remove purge from its shipping
brackets or container.
2. Disconnect purge gas and liquid
lines and conduit from shipping
bracket that spans purge supports
on top of the heating or auxiliary
condenser.
3. Remove shipping bracket and
screws from purge supports and
discard.
4. Locate purge on top of supports
(purge base goes outside
supports).
5. Secure the purge to the supports
with the hardware provided.
6. Using proper brazing techniques
as per American Welding society
(A.W.S.) braze the following four
copper lines at the factory
disassembly points:
• Purge suction line (larger)
• Purge liquid drain line
• Regeneration line
• High pressure cutout switch
Note: Verify that the high-pressure
cutout switch is connected to the
line, which proceeds to the chiller
condenser. (Check the copper tube
routing to verify.)
• Assure braze joints are leak free
7. Remove purge panel cover and
connect the unit wiring per the
unit wiring diagrams:
• Interprocessor communications
bus (IPC).
• Chiller motor temperature sensor
wires to motor temperature
module.
• Conduit to control panel and
interconnecting wires.
• After inspection of terminations
reassemble purge panel cover.
8. With completion of brazing and
electrical connections, the unit
valves can be opened for unit
operation.
Purge Piping
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