AUX EL Series Instrukcje Operacyjne Pobierz pdf (Strona 15)

09/11/2014 13 NI401

Figure 6: Open Loop Well to Well – Typical piping diagram.

Open Loop Freeze Protection Switch – Heat pump installations on open loop systems, using a non-antifreeze

protected water source during the heating mode require the use of a water coil freeze protection switch. If the

water supply to the heat pump is interrupted for any reason, continued operation of the compressor will cause

the water remaining in the water-to-refrigerant heat exchanger to freeze and rupture. The freeze protection

switch will shut the unit down before freezing can occur and protect the heat pump against flow loss and

damage.

Option – 39° F (3.9° C) pipe clamp-on, part number 6047. Connect in series with low limit.

Water Coils in Open Systems– Water quality is a major concern for open systems. Problems can occur from

scaling, particle buildup, suspended solids, corrosion, pH levels outside the 7-9 ranges, or biological growth. If

poor water quality is known to exist in your area a cupronickel water coil may be required when ordering the

system, or installing a closed loop system may be the best alternative. Water coil cleaning on an open loop

system may be necessary on a regular basis.

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AUX EL Series Instrukcje Operacyjne Strona 15