Earth Coupled Geothermal Systems - Carrier Aquazone 50PSW025 Installation, Start-Up And Service Instructions Manual

water-to-water unit. A bladder type expansion tank may be
used to maintain pressure on the system.
Avoid using low voltage (24 volt) solenoids, using them
may overload the unit transformer or interfere with the lock-out
circuit. Line voltage solenoids connected across the load side
(T1, T2) of the compressor contactor are preferred.
Pilot operated or slow closing valves are recommended to
reduce water hammer.
The discharge water from the water-to-water unit is not con-
taminated in any manner and can be disposed of in various
ways depending on the local codes (i.e. discharge well, dry
well, storm sewer, drain field, stream, pond, etc.)
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1 Ball Valves
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2 Hose Kits
—
3 P/T Plugs
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4 Load Side Connections*
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5 Low Voltage Control Connection*
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6 Vibration Pad
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7 Line Voltage Disconnect
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8 Supply and Return Lines of Central System
NOTE: Water and electrical connection locations vary depending on model. Connect as required per unit labels.
Fig. 4 — Typical Tower/Boiler Application (Source Side)
EARTH COUPLED
(Fig. 6) — Closed loop and pond applications require special-
ized design knowledge. No attempt at these installations
should be made unless the dealer has received specialized
training.
Utilizing the Ground Loop Pumping Package (GLP), makes
the installation easy. Anti-freeze solutions are utilized when en-
tering loop temperatures drop below 40 F or where piping will
be routed through areas subject to freezing. A flow rate be-
tween 2.5 to 3.0 gpm per nominal ton of cooling is recom-
mended for this application.
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GEOTHERMAL SYSTEMS