Application Considerations; Earth Coupled (Geothermal) Systems - Carrier GW Series Installation Instructions Manual

APPLICATION CONSIDERATIONS

Typical Load Side Applications
There are many load side applications for which the
water- -to- -water heat pump/ liquid chiller is ideally suited.
Some typical uses are as follows:
Hydronic baseboard heating, hydronic in- -slab floor heating, forced
air fan coil heating or cooling, ice and snow melting, heating
potable water, (when allowed by code) heating swimming pool and
spa*, process fluid heating or cooling.
When specifying load side fluid volume it is important to consider
the heat pump output capacities and flow rates. Insufficient load
side fluid volume may cause unstable heat pump operation (short
cycling). Pressure/temperature ports should be used to set flow
rates.
*A water- -to- -water series Heat Pump/Liquid Chiller can be utilized
for direct pool/spa heating without a secondary heat exchanger. In
this application cupronickel heat exchangers must be used.
1. POLYETHELENE WITH
INSULATION
2. GROUND LOOP PUMPING PACKAGE (GLP)
3. GROUND LOOP CONNECTION KIT
4. P/T PLUGS
5. LOAD SIDE CONNECTIONS*
6. LOW VOLTAGE CONTROL CONNECTION*
7. VIBRATION PAD
8. LINE VOLTAGE DISCONNECT
Automatic chemical feeders must never be installed upstream of
the unit. An external bypass should be installed to avoid
over- -flowing the heat exchanger to prevent coil erosion. The pool
pH levels and chemical balances must be maintained to avoid
possible heat exchanger damage.

Earth Coupled (Geothermal) Systems

Closed loop and pond applications require specialized design
knowledge. No attempt at these installations should be made unless
the dealer has received specialized training.
Anti- -freeze solutions are utilized when entering loop temperatures
drop below 50_F or where piping will be routed through areas
subject to freezing. A flow rate between 2.5 to 3.0 gpm per
nominal ton of cooling is recommended for this application. See
Flow Center Curve for sizing information. Refer to the Flow
Center installation manuals for more specific instructions.
* NOTE: Water and electrical connection locations vary depending
on model. Connect as required per unit labels.
Fig. 1 - - Earth Coupled Application
3
A14173