51
IOM, BS/BT Models
Enertech Global
Section 11: Equipment Start-Up Procedures
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 volt
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.
ON UNITS WITH
INTERNAL LOOP CIRCULATION PUMPS, USE THE INTERNAL SOURCE SIDE INPUT PT PORT.
DO NOT USE ANY EXTERNAL SOURCE SIDE INPUT PT PORT.
Output test readings may be taken
at any external PT port.
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.
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.
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