Bryant TSTATBBN2S01-C Instrukcja Instalacji Pobierz pdf (Strona 10)

Page 10

HYBRID GROUND LOOP/WELL WATER SYSTEMS

The GT-X dual refrigerant circuits with individual water

connections for each, allows each refrigerant circuit

to utilize a different ground source and beneﬁ t from a

dramatically shortened earth loop as illustrated in Figure

12. For instance a 4 ton unit can utilize a 2.5 ton earth

loop on circuit 1 and well or city water on circuit 2.

The earth loop is used as ﬁ rst stage with the well or city

water source used as the second circuit. Using the well

as second stage greatly reduces the amount of earth loop

required and limits the well or city water usage.

when sizing earth loops for this application because of

the increased runtime on the earthloop. Traditional

loop sizing will be inadequate and can result in poor

performance and possibly complete failure of the system.

Pete's plugs should be installed on both systems to

facilitate servicing. Standard water ﬂ ows can be utilized

on each circuit 2.25 - 3 gpm /ton for earth loops and 1.5-

2 per ton well/city water. Each circuit should have the

appropriate freezestat setting. Be sure circuit A is Earth

Loop and circuit B is Well Setting or City. The Ground

Loop and Well System sections should be consulted for

further details.

Table 4. Water Quality Standards

Acidity pH 7 to 9 range for copper. Cupro-nickel may be used in the 5-9 range.

Total Hardness Calcium and magnesium carbonate should not exceed 20 grains per gallon (350 ppm)

Iron Oxides Less than 1 ppm

Iron Bacteria No level allowable

Corrosiveness Max Allowable Level Coax Mtl

Ammonia, Ammonium hydroxide 0.5 ppm Cu

Ammonium chloride, Ammonium nitrate 0.5 ppm Cu

Ammonium Sulfate 0.5 ppm Cu

Chlorine/Chlorides 0.5 ppm CuNi

Hydrogen Sulfide (rotten egg smell) None Allowable -

Brackish Use Cupro-nickel heat exchanger when concentrations of calcium or sodium chloride

are greater than 125 ppm are present. (Seawater is approximately 25,000 ppm)

Note: To convert ppm to grains per gallon, divide by 17. Hardness in mg/l is equivalent to ppm

Note: City water rates should be examined for

feasibility before installation. City water should not be

used as a source in areas where water temperatures

fall below 45°F. ClimateMaster should be consulted

Figure 12. Typical Hybrid Loop/Well system

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 31 32

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