Niko_B
06-08-2011, 08:46 PM
Hello,
Have a bus with transicold a/c system with these simptoms:
Refrigerant: R134, TXV
Temperature inside the bus: 80F
Outdoor temperature: 92F
Suction pressure: 24psig
Head pressure: 220psig
Subcool: Temp measured at sightglass 104F
Superheat: didn't measure
Sight glass shows low on charge.
No significant temperature drop across the filter drier (no service valves for pressure drop measurement)
Condenser: Clean/ish , all fans running in good direction.
Evaporator: Not so clean (maybe 20% airflow restrictive)
Insuffitient cooling is the problem.
Help me understand high subcooling, sightglass not full, low suction, high head :confused:
Thank you.
Have a bus with transicold a/c system with these simptoms:
Refrigerant: R134, TXV
Temperature inside the bus: 80F
Outdoor temperature: 92F
Suction pressure: 24psig
Head pressure: 220psig
Subcool: Temp measured at sightglass 104F
Superheat: didn't measure
Sight glass shows low on charge.
No significant temperature drop across the filter drier (no service valves for pressure drop measurement)
Condenser: Clean/ish , all fans running in good direction.
Evaporator: Not so clean (maybe 20% airflow restrictive)
Insuffitient cooling is the problem.
Help me understand high subcooling, sightglass not full, low suction, high head :confused:
Thank you.