HTV/HTD/HTH SERIES Heat Controller, Inc.
49
Troubleshooting Form
Heat of Extraction (Absorption) or Heat of Rejection =
Flow rate gpm 500* x °F (water temp. difference)
= BTUH (heat absorbed or rejected)
Superheat = Suction temp - Suction saturation temp = _____________°F Superheat
Subcooling = Discharge Saturation Temp - Liquid Line Temp. = ____________°F Subcooling
* Use 500 for Water, 485 for antifreeze solution
Note: Never connect refrigerant gauges during startup procedures. Conduct water-side
analysis using P/T ports to determine water flow and temperature difference. If water-side
analysis shows poor performance, refrigerant troubleshooting may be required. Connect
refrigerant gauges as a last resort.
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