27
HP IOM, Rev. B
Enertech Global
Equipment Start-Up Process
Check the following before power is applied to the equipment
Caution: Do not start-up the unit until the new structure is ready to be occupied
Electrical:
Geothermal unit high voltage
wiring is installed correctly
Geothermal unit high voltage
wiring and breaker are the correct
size
Auxiliary electric heaters are
wired and installed correctly
Circulating pumps are wired and
fused (if necessary) correctly
Desuperheater pump is NOT
wired, unless piping is complete
and all air is purged
Low voltage wiring is correct and
completely installed
Equipment Start-Up
1.
Energize geothermal unit with
high voltage.
2.
Set the thermostat to “Heat” or
“Cool.” Adjust set point to
energize the unit. System will
energize after delays expire
(typically a five minute delay).
3.
Check water flow with a flow
meter (non-pressurized) or
pressure drop conversion
(pressurized). Pressure drop
tables must be used to convert
the pressure drop to GPM. The
pressure drop can be obtained by
checking water pressure in and
water pressure out at the P/T
ports.
4.
Check the geothermal unit’s
electrical readings listed in the
Unit Electrical Data table.
5.
Check the source water
temperature in and out at the P/T
ports (use insertion probe). Allow
10 minutes of operation before
recording temperature drop.
6.
Calculate the heat of extraction or
heat of rejection.
Plumbing:
Pipe and pump sizes are correct
Air is purged from all lines
Antifreeze is installed
All valves are open, including
those on the flow center
Condensate is trapped and piped
to the drain
Ductwork:
Filter is installed and clean
Packaging is removed from the
blower assembly
Blower turns freely
Canvas connections installed on
supply plenum & return drop
7.
Check the temperature difference
of the load coax (water-to-water)
or air coil (water-to-air). P/T ports
are recommended for use on the
load side, but the line
temperatures can be used to
check the temperature difference.
8.
Change the mode of the
thermostat and adjust the set
point to energize the unit. Check
the data in opposite mode as the
previous tests. Amp draws as
well as temperature differences
and flow rate should be recorded.
9.
Check auxiliary heat operation by
adjusting the thermostat set point
5°F above the room temperature
in “Heat” mode or set thermostat
to “Emergency." Record voltage,
amperage, and air temperature
difference.
Section 9: Equipment Start-Up
Equipment Start-Up Process Form
