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DISPLAY DEFAULT

The Safe-NET Display module can be configured to display one of

seven values continuously when not in an alarm condition or being

navigated via the Hand-Held Device or the module buttons.

The possible selections are:

1) Discharge Air Temperature Average 

(the average of multiple sensors)

2) Discharge Air Set Point

3) Average Discharge Air from a Control Module, if so

equipped.

4) Product Sensor 

(the lowest temperature if multiple sensors are attached)

5) Return Air Temperature Average 

(the average of multiple sensors)

6) Product Simulator Temperature Average 

(the average of multiple sensors)

7) Time-of-Day Clock

To select this item for modification, press the SELECT button on the

Safe-NET display module. The display will cycle between DISP and the

current setting. While the setting is being displayed, press SELECT

button on the Safe-NET display module to allow editing of the value.

When the Safe-NET display module begins flashing the value, use the

UP or DOWN buttons on the Safe-NET display module to change the

setting. 

Once the desired setting is displayed, press the SELECT button on the

Safe-NET display module to store the new value to NV memory. The

display will revert to cycling between DISP and the new value.

Note:

One or more sensors of the type selected must be installed to support the
selection.

Alarm Module (OPTIONAL)

The alarm module is an additional feature to Safe-NET. The alarm

module supplies power to the display module via an 8-wire cable. The

alarm module provides battery back up power to the display module

during loss of A.C. power. The display module communicates with the

alarm module via a 2-wire cable. Additionally, the alarm module is

equipped with a beeper to provide audible notification of alarms.

DISPLAY SYMBOL IDENTIFICATION

Safe-NET™ Self-contained Operating Instruction

Page 

8 of 8 — P/N 0485005_B

© 2007 Hussmann Corporation • Bridgeton, Missouri  63044-2483 U.S.A.

www.hussmann.com/cstore/c_techinfo.htm

20 June 2007

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Detailed technical information is available 

in the 

Safe-NET Technician’s Manual

(Hussmann part number 0461391A), at  

http://www.hussmann.com/docs/inst

_manuals/other/0461391A_SafeNET.pdf

Summary of Contents for Safe-NET

Page 1: ... need for separate wiring Sensors in each case are harnessed together to a single wire leading to the display module Sensors are designed for rugged durability Should a sensor fail it can be replaced Optional Wireless Hand held Controller and or PC Control The wireless controller communicates with the display unit through an infrared sensor This allows setups and queries which can also be performe...

Page 2: ...ay module is lighted Every 12 seconds A Er is displayed for 3 seconds for the remaining time the product simulator temperature is displayed The beeper on alarm board beeps every 30 seconds The A Er audible alarm is active only when external power is applied Precedence of Alarms Severity of the alarm determines the beeper action The following table shows the priority of the alarms An alarm with hig...

Page 3: ...read the sensors DischargeAir HighAlarm dSHi This alarm is generated when the average discharge air temperature in the case over the programmed alarm delay time is higher than the HighAlarm value stored in the control This alarm will clear if the average discharge air temperature goes below the High alarm value THIS ALARM IS AVAILABLE ONLY IF DISCHARGE SENSORS ARE INSTALLED DischargeAir LowAlarm d...

Page 4: ...rdingly in the detailed parameter descriptions PASSWORD PROTECTION Parameters that are critical to proper equipment performance cannot be modified until a numeric password is entered into the Safe NET display module This prevents accidental or malicious changes in the Safe NET system from occurring Entering the password is done in the SETUP menu At the top of the SETUP menu press the UP button on ...

Page 5: ...g F the ON OFF control method will attempt to maintain the 10º by cycling the control device ON at temperatures above 10º and OFF at 0º This temperature control is superceded by a fixed minimum ON time of 3 minutes Hence lower DIFF settings will result in tighter temperature control but more frequent control device compressor valve cycling Conversely higher DIFF settings will reduce control device...

Page 6: ...at a valid PASSWORD be entered first DTYP The Safe NET system is capable of controlling defrost activity and scheduling The Safe NET system is capable of controlling six types of defrost OffC DET Mod ELE2 GAS and ELE1 1 OffC Off Cycle During off cycle defrost refrigeration to the fixture is stopped by either cycling off the compressor if so equipped shutting off the liquid line solenoid valve shut...

Page 7: ...ed as represented to the right Missing or non connected sensors will not appear in the designated sequence Average temperatures are available to view so long as the associated sensing devices are attached DSAV DischargeAirAverage RTAV ReturnAirAverage PDAV ProductAverage T LO LowestTermination Sensor Reading ILET Evaporator Inlet OLET Evaporator Outlet TSNL LeftTermination Sensor TSNC CenterTermin...

Page 8: ...e desired setting is displayed press the SELECT button on the Safe NET display module to store the new value to NV memory The display will revert to cycling between DISP and the new value Note One or more sensors of the type selected must be installed to support the selection Alarm Module OPTIONAL The alarm module is an additional feature to Safe NET The alarm module supplies power to the display ...

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