Oil Charge - Hussmann Proto-Aire Installation 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.
Therefore, charge only until the sight glass on the receiver is covered with refrigerant when
the system is operating in a balanced refrigeration mode. Protocol™ units with gas defrost
should also be monitored during defrost to ensure that the receiver does not completely
empty. Add enough refrigerant, if necessary, to maintain a liquid seal on the receiver outlet
if the receiver empties during defrost.
Use only Mobil EAL Arctic 22 CC, ICI Emkarate RL 32 CF, or Copeland Ultra
The compressors and the Turba-Shed must be closely monitored during startup
because the POE oil does not return from the evaporators as quickly as mineral oil
Compressor Motor Rotation
To check compressor rotation, use the following procedure:
1. Install gauges on suction and discharge headers. Be aware of Satellite and Split-
Suction Protocol™ units when making hookup. A momentary compressor run
should cause a drop in suction pressure and a rise in discharge pressure.
2. With convenience switch OFF, switch OFF all breakers in the control panel
EXCEPT the control circuit breaker.
3. Turn ON convenience switch.
4. Look for the green light on the single-phase protector. If the light is red, turn OFF
the convenience switch. All Protocol™ 3-phase wiring is connected L
T and L to T
1, 3 3.
indicates phase alignment. (The light is green.)
5. Turn ON convenience switch.
6. Turn all compressors ON using the electronic controller.

Oil Charge

Charge the Turba-Shed with oil.
22 CC
Turba-Shed is shipped without oil charge.
Oil Levels
Compressor top half of the sight glass
Turba-Shed between the two sight glasses
Important Notice to the Installer
Have the field connections corrected so the phase protector
102
Protocol™ Installation and
Service Manual
to T L
1 1, 2
to