Example:
The suction pressure is 130 PSIG and the suction line temperature is 57 °F
Suction Line Temperature | = 57°F |
Saturation Temperature for 130 PSIG | = 45°F |
Evaporator Superheat | = 12°F |
When adjusting the expansion valve, the adjusting screw should be turned not more than one turn at a time, allowing sufficient time (approximately 15 minutes) between adjustments for the system and the thermal expansion valve to respond and stabilize.
The superheat setting should be adjusted to 12°F at design conditions.
FORM
Leak Checking
Leak check compressors, fittings and piping to assure no leaks. Verify the evaporator distributor tubes do not have bare copper touching each other or are against a sheet metal edge. If you are leak checking a unit charged with
If the unit is functioning satisfactorily during the initial operating period, no safeties trip and the unit controls are functioning properly, the rooftop unit is ready to be placed into operation.
3
JOHNSON CONTROLS | 51 |
