Oil Charge; Compressor Motor Rotation - Hussmann Proto-Aire EZ Manual Del Usuario

Proto-Aire EZ I/O Manual
Because the HFC refrigerants are less dense than the refrigerants they replace, they will tend to
"flash" or bubble more easily, even when the correct charge is in the system.
Use only Mobil EAL Arctic 22 CC, ICI Emkarate RL 32 CF, or Copeland Ultra 22 CC
The compressors and oil separator must be closely monitored during startup, because the POE

Compressor Motor Rotation

To check compressor rotation on three phase units, use the following procedure:
1. Install gauges on suction and main discharge line. A momentary compressor run should
cause a drop in suction pressure and a rise in discharge pressure.
2. Switch OFF all breakers in the control panel EXCEPT the control circuit breaker.
3. Turn ON main power switch.
4. Look for the green light on the single-phase protector. If the light is red, turn OFF the
main power switch. All Proto-Aire EZ 3-phase wiring is connected L1 to T1, L2 to T2,
and L3 to T3. Have the field connections corrected so the phase protector indicates phase
alignment. (The light is green.)
5. Installing contractor should re-check condenser fan rotation.
6. Turn ON main power switch.
7. Turn all compressors ON using the electronic controller.
Charge the oil separator with oil.
Oil separator is shipped without oil charge.
Compressor − top half of the sight glass
Oil separator − between the two sight glasses
Important Notice to the Installer
oil does not return from the evaporators as quickly as mineral oil

Oil Charge

Oil Levels
19
3090249_D
P/N