Installation and Maintenance Manual

Installation
WSHP-SVX10B-EN 17
may have occurred due to increased heat. Repair as
required.
5. Open the system at the lowest point for the initial blow
down (making sure the make up water is equal to the
water being dumped). Continue blow down until the
water leaving the drain runs clear, but not less than 2
hours.
6. Shut down pumps and supplementary heat system.
Reconnect the hoses placing the water-to-refrigerant
heat exchanger in the water circulating system.
Note: Vents should be open when the pumps and
supplementary heat system are shut down.
Using Antifreeze
In areas of the country where entering water temperatures
drop below 45°F or where piping is being run through
areas subject to freezing, the loop must be freeze protected
by using an approved antifreeze solution to prevent the
earth loop water from freezing inside the heat exchanger.
Methanol and glycols are the most commonly used
antifreeze solutions. Consult your geothermal unit
supplier for locally approved solutions in your area.
Propylene glycol is not recommended in installations
where the water temperature are expected to fall below
30°F. At extreme temperatures, the viscosity increases to
the point where normal loop circulating pumps may not
maintain proper flow.
If propylene glycol is the only locally approved solution for
anti-freeze, good engineering practices should be used to
achieve the desired flow.
Calculate the approximate volume of water in the system
by using the requirements detailed inTable 8, Water
Volume. Add three gallons to this total to allow for the
water contained in the hose kit and geothermal unit.
Low Voltage Wiring
Factory ordered thermostats and zone sensors are pre-
wired with a quick connecting plug.
1. After installing the cabinet assembly, simply plug the
male portion of thermostat/zone sensor plug into the
female portion of the plug located inside the unit’s
junction box.
2. Mount the thermostat or zone sensor on the finished
drywall.
Thermostat/zone sensor connection is shown in Figure 15,
p. 17.
Low Voltage Wiring for Field Provided
Thermostats/Zone Sensors
Ensure that the AC control wiring between the controls
and the unit’s termination point does not exceed three (3)
ohms/conductor for the length of the run.
Check all loads and conductors for grounds, shorts, and
mis-wiring.
Do not run the AC low voltage wiring in the same conduit
with the high voltage power wiring.
Figure 14. Flushing the water loop
Table 6. Antifreeze requirements based on volume
Type of
Antifreeze
Minimum Temperature for Freeze
Protection
10°F 15°F 20°F 25°F 30°F
Methanol
25% 21% 16% 10% 3%
Propylene Glycol
————6%
CIRCULATING
PUMP
WATER-SOURCE
HEAT PUMP
CONNECTION
HOSE
GROUND-LOOP
OR
COOLING TOWER/BOILER
TEMPORARY
CONNECTION
FOR SYSTEM
FLUSHING
NOTICE:
Component Failure!
Resistance in excess of 3-ohms per conductor could
result in component failure due to insufficient AC
voltage supply.
Table 7. 24V AC conductors
Distance from unit
to Control
Recommended
Wire Size
000-460 feet 18 gauge
461-732 feet 16 gauge
733-1000 feet 14 gauge
Figure 15. Zone sensor connection
Six (6) Pin Connector/Harness
• Red = 24V
• Black = Fan
• Orange = RV
• Yellow = Compressor
• Blue = Common