Installation
WSHP-SVX10H-EN
19
Note:
Vents should be open when the pumps and
supplementary heat system are shut down.
Figure 16. Flushing the water loop
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 in the
, Water
Volume. Add three gallons to this total to allow for the water
contained in the hose kit and geothermal unit.
Table 8.
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%
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, zone sensor or Trane® Air-Fi® WCI
module on the finished drywall.
Thermostat/zone sensor connection shown below in the zone
sensor connection figure.
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.
NOTICE
Component Failure!
Resistance in excess of 3 ohms per conductor could
result in component failure due to insufficient AC
voltage supply.
Do not exceed three (3) ohms per 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.
Table 9.
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 17. Zone sensor connection
Six (6) Pin Connector/Harness
•
Red = 24V
•
Black = Fan
•
Orange = RV
•
Yellow = Compressor
•
Blue = Common
CIRCULATING
PUMP
WATER-SOURCE
HEAT PUMP
CONNECTION
HOSE
GROUND-LOOP
OR
COOLING TOWER/BOILER
TEMPORARY
CONNECTION
FOR SYSTEM
FLUSHING
Table 10. Deluxe controller diagnostic LEDs
Color: Green
Color: Red
Controller Mode
LED1
LED2
LED3
OFF
OFF
OFF
Control OFF
ON
OFF
OFF
Normal/Compressor OFF
ON
OFF
FLASH
Anti-short Cycle
ON
OFF
ON
Normal/Compressor ON
FLASH
ON
OFF
Brownout Condition
ON
FLASH
ON
Soft Lockout (low pressure)
ON
FLASH
FLASH
Soft Lockout (high pressure)
ON
ON
ON
Manual Lockout (low pressure)
ON
ON
FLASH
Manual Lockout (high pressure)
