Manual Heat Pump Model HHPM-V.2- SEP 2012
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discharge pressure will begin to rise and the suction pressure fall as indicated by the installed gauges.
If on startup the suction pressure begins to rise with a corresponding decrease in discharge
pressure or if there is an objectionable noise emanating from the compressor, then the compressor is
reverse rotating.
If the compressor is reverse rotating, de-energize the heat pump and reverse any 2 of the
incoming power supply wires.
When the heat pump is reenergized, proper gauge readings should now be present.
• Check the line current with the clamp-amp probe or digtal display, this value should be below the rated
full load current stated on the heat pump wiring diagram and the heat pump serial tag.
• Monitor the temperature difference between inlet and outlet water. The outlet water temperature shall be
between 53
o
C up if the heat pump is operating correctly and the inlet water temperature is less than 45
o
C. The outlet water temperature rise with the inlet water temperature, but not more than 70
o
C.
• Monitor the temperature difference between the inlet and out air. The leaving air temperature should
lower than the entering air temperature.
• Monitor the liquid refrigerant sight glass. It will probably indicate the presence of bubbles. These
should clear within the first 30 minutes of operation. Refer to the troubleshooting section of this manual if
this condition persists.
• The above listed conditions indicate a successful startup. Any deviations from these normal startup
conditions should be checked out in the troubleshooting section.
• Continue to run the heat pump until it reaches steady state operating conditions before filling out the
startup portion of the Warranty Registration Card.
Warranty Registration Card:
It is very important to fill out the Warranty Registration Card completely
(including startup information) and send it in to the factory. This will allow the factory to document the
successful startup.
NOTE:
The Warranty Registration Card
must be returned within (10) days
of installation to validate warranty
coverage. A copy of the Warranty Registration Card is included at the end of this manual.
5.3 Normal Operation
Once the heat pump is operating at steady state condition and the outlet water temperature is up
to a higher value 58-63
o
C the unit can be checked for normal operation. The amperages of the compressor,
