W2W Series Heat Pump
Ecologix Heating Technologies Inc
Page
12
www.ecologix.ca
221 Holiday Inn Drive Cambridge ON
ph: 519-658-4330
entering loop temperature, the leaving loop
temperature would be 25-22°F and freeze
protection should be at 15°F (30°F-15°F=15°F).
All alcohols should be premixed and pumped
from a reservoir outside of the building when
possible or introduced under water level to
prevent fuming. Initially calculate the total
volume of fluid in the piping system using the
Table. Then use the percentage by volume
shown in
Table 5
for the amount of antifreeze.
Antifreeze concentration should be checked from
a well-mixed sample using a hydrometer to
measure specific gravity.
ELECTRICAL – LINE VOLTAGE
General Line Voltage Wiring
Be sure the available power is the same voltage
and phase as that shown on the unit serial plate.
Line and low voltage wiring must be done in
accordance with local codes or the National
Electrical Code whichever is applicable.
WARNING
To avoid possible injury or death due to
electrical shock, open the power supply
disconnect switch and secure it in an open
position during installation.
W2W Power Connection
Line voltage connection is made by connecting
the incoming line voltage wires to the “Line”
side of the contactor or the power block as
shown in the wiring diagram located on the
electrical panel door of the unit.
Field Wiring
All field installed wiring, including electrical
ground, must comply with the National
Electrical Code as well as all applicable local
codes.
Refer to the unit wiring diagrams for fuse sizes
and a schematic of the field connections that
must be made by the installing (or electrical)
contractor.
Consult the unit wiring diagram provided with
the equipment or located on the inside of the
compressor access panel to ensure proper
electrical hookup.
All final electrical connections must be made
with a length of flexible conduit to minimize
vibration and sound transmission to the building.
ELECTRICAL – LOW VOLTAGE
Thermostat Connections
The aquastat/thermostat or set point control
should be wired directly to the wire connections
in the unit. Refer to wiring diagrams provided
with the unit or the Ecologix pump module
supplied with the unit.
Water Solenoid Valves
When solenoid valves are used, a slow closing
valve may be required to prevent water hammer.
The valve takes approximately 60 seconds to
open (very little water will flow before 45
seconds) and it activates the compressor only
after the valve is completely opened (by closing
its end switch). Only relay or triac based
electronic thermo-stats should be used with the
AVM valve. When wired as described above, the
valve will operate properly with the following
notations.
1-The valve will remain open during a unit
lockout.
2-The valve will draw approximately 25-35 VA
through the “Y” signal of the thermostat.
Note: This can overheat the anticipators of
electromechanical thermostats.
Therefore only
relay or triac based thermostats should be used
when a water solenoid valve is present.