Well Water Systems - Sears GT Series Installation Instructions Manual

Well Water Systems
IMPORTANT: Table I must be consulted for water quality
requirements when using open loop systems. A water sample must
be obtained and tested, with the results compared to the table.
Scaling potential should be assessed using the pH/Calcium
hardness method. If the pH is <7.5 and the calcium hardness is
1<100 ppm, the potential for scaling is low. For numbers out of the
range listed, a monitoring plan must be implemented due to
probable scaling.
Other potential issues such as iron fouling, corrosion, erosion and
clogging must be considered. Careful attention to water conditions
must be exercised when considering a well water application.
Failure to perform water testing and/or applying a geothermal heat
pump to a water supply that does not fall within the accepted
quality parameters will be considered a ntis-application of the unit
and resulting heat exchanger failures will not be covered under
warranty. Where a geothermal system will be used with adverse
water conditions, a suitable plate-frame heat exchanger MUST be
used to isolate the well water from the geothermal unit.
Proper testing is required to assure the well water quality is suitable
for use with water source equipment.
In conditions anticipating moderate scale formation or in brackish
water, a cupronickel heat exchanger is recommended. Copper is
adequate for ground water that is not high in nfineral content.
In well water applications, water pressure nmst always be
maintained in the heat exchanger. This can be accomplished with
either a control valve or a bladder type expansion tank.
When using a single water well to supply both domestic water and
the heat pump, care nmst be taken to insure that the well can
provide sufficient flow for both.
In well water applications, a slow closing solenoid valve must be
used to prevent water hammer (hammering or stuttering sound in
the pipeline). Solenoid valves should be connected across Y1 and
C1 on the interface board for all. Make sure that the VA draw of the
valve does not exceed the contact rating of the thermostat. (See
Fig. 3)
[]NIT OPERATION HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
Discharge air configuration change is not possible on Heat
Pumps equipped with Electric Heat Option.
/
//
r- 7
[ Typicalinstallation shown for [
illustration purposes only.
I_ ........ J
(1) Flex Duct Connection
(2) Low- Voltage Control Connection
(3) Vibration Pad
(4) Ball X?alves
(5) Solenoid 'Calve Slow Closing
(6) Condensate Drain Connection
(7) Drain 'Calves
(8) Hose Kits (optional)
(9) Pressure Tank (optional)
(10) P/T Ports (optional)
(11) Line Voltage Connection
(12) Electric Heater Line Voltage Disconnect
(13) Unit Line Voltage Disconnect
Fig. 3 - Example Well Water System Setup
A14130