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 Part number 20079, Rev 0 

 

B

ASIC 

O

PERATION

 

The Control Center Monitor has two modes: NORMAL RUN MODE and PROGRAMMING MODE.   

In Normal Run mode, the display shows the temperature that the probe is reading to the lowest 

whole number, i.e., if it shows a value of 10.0ᵒ, the actual temperature can range from 10.0 to 

10.9.   

Press the UP button to cause the display to show the high temperature set point.   

Press the DOWN button to cause the display to show the low temperature set point.   

The Control Center compares the probe’s temperature reading to HIGH and LOW temperature 

set  points.  The STATUS LED glows green when the probe reads an in-range temperature 

(between the two set points) and red when the temperature is out of range (equal to or outside 

the set points). 

The Control Center will not declare an alarm until the out-of-range state has continued for a 

specified time (the “alarm delay”).  This alarm delay time is designed to prevent transient, 

nuisance alarms. 

When an alarm condition is declared, the BEEPER and ALARM LED will both activate.  Press the 

MUTE/PROGRAM button to stop the beeper for a specified time, changing the sound to short 

‘chirps’. When the temperature goes back within range, and there are no out-of-range readings 

for thirty seconds, the chirping stops and the MUTE/PROGRAM button resets.  If another out-

of-range condition then occurs, the beeper will again start at full volume.  

After the user-programmable “SILENCE” parameter times out, if the alarm condition still exists, 

the beeper will annunciate again at full volume until MUTE/PROGRAM is pushed. 

Battery Back-Up (B) 

The Control Center has a battery back-up option. It ships with the battery in place and 

connected.  Remove the white nylon screw located on the lower left side of the module to 

activate the battery option.  

When line power is present, all of the normal features of The Control Center are operating.  

When line power is lost, the battery provides power to maintain two important functions: 

 

Operate the audio and visual alarms.  They flash/beep less frequently than usual, in order to 

avoid draining the battery. 

 

Continue to display the temperature of the area being monitored.  The display will flash, to 

save power. 

 

 

Summary of Contents for ABT-2020MP

Page 1: ...of delivery Make sure you get a signed copy Send a written request for an inspection to the carrier B Concealed Damage This type of damage may not be discovered until the unit is being unpacked When concealed damage is discovered stop unpacking immediately and contact the carrier immediately to report the claim and request an inspection This should be done as soon as possible and in any case must ...

Page 2: ...URER S TECHNICAL SERVICE DEPARTMENT please have the unit s model and serial number ready as well as the problem description The model and serial number is located on the serial tag which can be found on the interior left upper wall of the unit For convenience you may want to record the following information here for easy access in the future Model number __________________________________ Serial n...

Page 3: ...ry receipt acknowledging the damage This has to happen at the time of delivery or it won t happen at all Keep a copy for your records and send another to the carrier s damage claims department along with a formal request for an inspection report Follow up with a phone call Their contact information can be found on the carrier s web site The second type of shipping damage is concealed damage This t...

Page 4: ...the screw type adjustable leveling legs on the front corners of the unit Turn counterclockwise to raise the corner turn clockwise to lower it The unit may have a slight tilt from front to back after the legs are installed This is acceptable and is actually recommended POWER SOURCE The supply circuit to this cabinet must conform to all National and Local Electrical Codes Consult the cabinet Serial ...

Page 5: ...ALLATION not applicable to all models Hook shelf clips onto pilaster strips see Illustration Position all four shelf clips equal in distance from the floor for flat shelves Wire shelves are oriented so that cross support bars are facing down Place shelves on shelf clips making sure all corners are seated properly TEMPERATURE CONTROL NOTE The controls are preset at the factory to provide the desire...

Page 6: ...mum load is about 75 of the chamber volume Additionally the load should be distributed evenly from top to bottom and side to side for best results These freezers come with 5 interior doors one for each shelf to help minimize the temperature transients resulting from opening the main door You should still minimize the time the freezer door is open On top of letting the cold air out you are also let...

Page 7: ...iated with the alarm system i e delay times system status a battery backup which will maintain the alarm system for several hours after a power failure to allow for continued alarm and notification functions The temperature monitor system does NOT control the temperature of the unit That function is performed by the Microprocessor Digital Temperature Control which is preset at the factory and shou...

Page 8: ... pressed The MUTE PROGRAM button has three functions In Normal Run mode if the unit is beeping pressing the button will mute the beeper for a preset time Each time the button is pressed the mute time resets Holding the button down for two seconds takes the unit out of Normal Run mode and into Programming mode At the same time it mutes the beeper When in Programming mode pressing the button steps t...

Page 9: ...d the BEEPER and ALARM LED will both activate Press the MUTE PROGRAM button to stop the beeper for a specified time changing the sound to short chirps When the temperature goes back within range and there are no out of range readings for thirty seconds the chirping stops and the MUTE PROGRAM button resets If another out of range condition then occurs the beeper will again start at full volume Afte...

Page 10: ...in a short period 5 Once the Monitor is in Programming mode each time the Mute button is pressed the display steps to the next parameter As the display steps to the next parameter the value of the previous parameter is saved Once the final parameter is reached pressing the MUTE button returns the monitor to Normal Run mode saving the final parameter Description of Parameters for Control Center Hi ...

Page 11: ...emote Alarm Relay is a single pole double throw SPDT relay that changes state switches with the loss of line power or with the presence of an alarm condition NOTE The relay is rated for pilot duty operation only Do NOT use it for control switching The relay contacts and connections are rated at 30v 1A In normal applications the relay signals remote alarms or central monitoring systems that an alar...

Page 12: ...e of the unit A touch keypad allows the user to easily select the display units set point differential set point and heating or cooling mode Please Note The digital temperature controller has been factory set and tested to allow your unit to operate at its desired temperature cycle Adjusting the settings on the controller will alter these factory settings WE STRONGLY RECOMMEND YOU CONTACT THE MANU...

Page 13: ...t point and S1 will be blinking Press the up and down keys to adjust to the desired setting S1 blinking Set point Temperature Press SET key again to access the differential mode The LCD will display the current differential and DIF1 will be blinking Press the up and down keys to adjust to the desired setting DIF 1 blinking Differential Temperature Press SET key again to access the cooling or heati...

Page 14: ...ry EP Appears when the probe is open shorted or sensing a temperature that is out of range Check to see if the sensed temperature is out of range If not check for probe damage by comparing it to a known ambient temperature between 30 F and 220 F Replace the probe if necessary EE Appears if the EPROM data has been corrupted This condition cannot be field repaired Replace the control CL Appears if c...

Page 15: ...eplacements are pushed against rear wall or interrupted the proper refrigerator air circulation For the proper air circulation place the products evenly on each shelf Do not push against the refrigerator s rear or side walls Evaporator is blocked by frost or ice Remove the products unplug the refrigerator or freezer power and allow the unit to defrost If the problem still exists call for service 3...

Page 16: ...vent leakage Door will not close The unit is not level Refer to the Leveling section at the beginning of this manual Check for dirt and debris or items passing through the door seal MOISTURE DURING THE SUMMER SEASON The amount of moisture condensation or high humidity related issues increase during the summer and in most cases will self resolve when the weather cools down Please note a refrigerati...

Page 17: ...ing soda in 1 quart of warm water Be sure to wring excess water out of sponge or cloth before cleaning around controls light bulb or any electrical parts Door Gaskets Soap and water Wipe gaskets and their seating surfaces with a clean soft cloth Shelves Soap and water Do not wash removable shelves in dishwasher Exterior and Handles Soap and water Non Abrasive Glass Cleaner Do not use commercial ho...

Page 18: ... pan occasionally to ensure it does not overflow A inch garden hose adaptor available at most hardware stores can be used to drain the freezer directly into a floor drain Replace the drain plug when defrosting is complete so warm air does not enter the freezer through the hole Defrosting tips If the frost is soft remove it with a plastic scraper If the frost is glazed and hard fill deep pans with ...

Page 19: ...TY In addition to the two 2 year warranty stated above Horizon Scientific Inc warrants its hermetically and semi hermetically sealed compressors to be free from defects in both material and workmanship under normal use and service for a period of three 3 additional years from the end of the initial two 2 year warranty period but not to exceed five 5 years after shipment from Horizon Scientific Inc...

Page 20: ...ood or other external causes It does not apply to defects resulting from failure to properly install operate or maintain the product in accordance with the printed instructions provided or damage caused by the storage of any corrosive material that comes in contact with the interior or exterior portions of the cabinet or the use of spark producing equipment or containers such as galvanized or carb...

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