Hussmann HGM-1 BS, Installation & Operation Manual

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tart up
/ O
peratiOn
P/N 0515297_E
U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • www.hussmann.com
Safe-NET III ™
TEMPERATURE AND DEFROST
CONTROLLER
SAFE-NET III™ USER INSTRUCTIONS
Your refrigerated case uses a Hussmann
Safe-NET™ III temperature and defrost
controller to precisely maintain the tempera-
ture and prevent frost buildup on the cooling
coil. LEDs indicate when the compressor or
refrigeration is on, when the case is in a defrost
cycle, if the temperature is outside the desired
range, or if there is a sensor failure.
An adjustment knob allows the temperature
to be set within the configured range and can
power off the controller and compressor. Your
controller has been custom-configured to pro-
vide the best temperature and defrost control
for your chilled or frozen food.
The front of the controller has an adjustment
knob and status LEDs. The back of the
controller has connections for sensors and
switched equipment.
The Safe-NET III controller includes the
following features and connections.
• Adjustment knob:
Adjusts the temperature setpoint.
Turn adjustment knob to OFF to turn off
refrigeration system. Unplug merchandiser
from power before servicing the unit.
• Controller LEDs:
Compressor Powered On LED (green):
Lights while the compressor is running or
the refrigeration valve is open.
Defrost Cycle LED (yellow):
Lights while the refrigeration coil is
defrosting.
Temperature or Sensor Alarm (red):
Lights if the temperature is too warm or
too cold. Flashes if a sensor fails.
Adustment
Knob
Compressor Powered On
green
Defrost Cycle
yellow
Temperature or Sensor Alarm
red
Warm
Position
Off
Position
Cold
Position
Interface Box and
Copy Card TTL Connector
Defrost Termination
Switch (optional)
Sensor and Switch
Common
Evaporator
Temperature
Sensor
Case
Temperature
Sensor
Heater
E72R
Fan
E72R only
Power
Compressor
START UP / OPERATION