73
IOM, VS/VT Models, Rev A Enertech Global
To suction line bulb
To suction line
Air Coil
Suction
Coax
Discharge
Heating
Mode
Air Coil
Suction
Coax
Discharge
Cooling
Mode
Liquid line (heating)
°F
Liquid line (cooling)
°F
Discharge Line
psi
(saturation)
°F
Suction Line
psi
(saturation)
°F
Suction temp
°F
Air Coil
TXV
Filter Drier
Reversing
Valve
Source
Coax
Optional desuperheater
installed in discharge line
(always disconnect during
troubleshooting)
Source (loop) IN
Source (loop) OUT
°F
psi
°F
psi
Return Air
°F
Supply Air
°F
GPM
Customer/Job Name:____________________________________________ Date:________________________________
Model #:__________________________________________ Serial #:____________________________________________
Antifreeze Type:____________________________________
HE or HR = GPM x TD x Fluid Factor
(Use 500 for water; 485 for antifreeze)
SH = Suction Temp. - Suction Sat.
SC = Disch. Sat. - Liq. Line Temp.
Section 12: Troubleshooting
Troubleshooting Worksheet