AUX EL Series Instructions d'exploitation télécharger pdf (Page 10)

09/11/2014 8 NI401

Figure 3

P/T Adapter

Mechanical Installation Source Water

WARNING

LOOP DESIGN IS EXTREMELY IMPORTANT FOR PROPER HEAT PUMP OPERATION.

INCORRECT LOOP DESIGN WILL REDUCE HEAT PUMP EFFICIENCY, CAUSE POOR

PERFORMANCE OR MAY RENDER THE SYSTEM UNUSABLE. CONTACT AN IGSHPA OR

CGC CERTIFIED GEOTHERMAL LOOP CONTRACTOR FOR PROPER INSTALLATIONS.

Water Connections General

The following pages outline typical piping arrangements for the most common source water connection options,

as well as flushing and filling procedures and antifreeze requirements for closed loop systems. Do not connect

copper piping directly to the source water connection points on this unit. A section of flexible piping is

recommended to reduce and isolate vibrations transmitting from the compressor into other parts of the system.

Once closed loops are completed, they must be pressure tested to at least 60 PSI to ensure integrity. Once

pressure is tested, loop must be purged of all foreign debris and filled with fluid. All air must be removed at

this time by flushing the system. (Table 2) shows approximate fluid volumes.

Pressure/Temperature (P/T) plugs – Should be installed in the adaptor elbow on the entering

and leaving water line of the heat pump on a closed system. (Figure 3), A thermometer can be

inserted into the P/T ports to check entering and leaving water temperatures. A pressure gauge

can also be inserted into these P/T ports to determine the pressure differential between the

entering and leaving water. This pressure differential can then be compared to the engineering

specifications data to determine the flow rate of the system.

Flow Center – if selecting a non-pressurized closed loop design, a flow center is required. A flow center is a

key component to installation ease and long-term reliability.

Loop Pump Selection – Select a loop circulation pump based upon the GPM required and total system pressure

drop. See specification, page 3. Geo heat pump Btu/h capacity and efficiency are directly related to the GPM

flow through the unit.

Vibration pad – suggest setting the unit on a sound vibration pad, available from most distributors or

accessories price sheet – R-PAD-2735-1-**.

Water quality – models with standard copper heat exchanger coils require the installer to evaluate water

quality and meet minimum water properties.

 pH/calcium hardness pH < 7.5 and Ca harness < 100 PPM

 Iron fouling < 0.2 PPM (Ferrous)

< 0.5 PPM of oxygen

 Hydrogen sulfide (H

S) < 0.5 PPM

 Chloride levels < 20 PPM

 Erosion/clogging < 10 PPM, particles

 Filter, if required < 800 micron size

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AUX EL Series Instructions d'exploitation Page 10