Hussmann Proto-Aire Installation Manual page 64

One 240/1 or 3/60-50 connection to 240V convenience switch in panel
One derived neutral from transformer
For 380-460/3/60-50 Compressor Units without Remote Mounted Transformer:
To each Protocol™ provide
One 380-460/3/60-50 branch circuit
One ground wire to earth ground
One 208-240/1 or 3/60-50 branch circuit
One 120/1/60-50 neutral
For 575/3/60 Compressor units without Remote Mounted Transformer:
To each Protocol™ provide
One 575/3/60 branch circuit
One ground wire to earth ground
One 220/1/60 branch circuit
Consult factory for other voltages.
Alarm Wiring
Protocol™ provides one NO/NC pilot duty relay for remote alarm. The field connection
pins are located in the convenience switch panel.
Temperature Sensors and Defrost Termination Thermostats
Use shielded and grounded Belden Cable #8762, or equivalent, between control panel and
case sensors or thermostats.
Shielded cable must be used. The shield wire must be attached to the panel liner
on the control panel door.
Additional Circuits
Check the store legend for components requiring electrical circuits to the Control Panel and
Case Power Distribution Box. The Protocol™ can provide power for all case electrical
needs including:
Fan and Anti-sweat Heater Circuits
Satellite Control
Electrical Defrost Heaters
Case mounted refrigeration solenoid
Case Lighting
Unit Cooler Fan Power (electric defrost only)
Important
60
Protocol™ Installation and
Service Manual