Heatcraft Refrigeration Products BEACON II H-IM-79E, Installation And Operation Manual

13

  •  Defrost Type – 

“A-E ” - 

Selection is made for air 

defrost or electric defrost coil. This will  

automatically set the system factory defaults for  

air defrost and electric defrost. (See default  

settings.) Please note that the refrigerant type  

default for air defrost is R-22 and for electric  

defrost it is R404A. All units are shipped with  

factory defaults settings.

  •   Refrigerant Type - 

“rEF” 

- Selection for type of 

refrigerant - R-22, R-404A or R-507. Default:  

Air defrost is R-22 and for electric defrost it is  

R-404A.

  •   Box Temperature - 

“bot” 

- Select box 

temperature setpoint. Selection range is -30°F to  

+70° F. Defaults: Electric defrost -10°F and air  

d35°F.

  •   Superheat - 

“SUP” - 

Evaporator superheat is 

controlled by the board on each evaporator.  

Each board measure the evaporator saturation  

suction temperature and the suction pressure to  

determine the superheat. The superheat value  

at the evaporator can be changed to ensure a  

20°F to 30°F superheat at the Compressor.  

Default: 8°F.

  •   Evaporator Board: Slave? - 

“SLA”

 - On multiple 

evaporator systems, each evaporator board has  

to be programmed to be a Master or a Slave.  

Each board is shipped from our factory set as  

a Master. You must make this change to each  

Slave evaporator. A selection of “YES” is made  

for this setting.

The default for each board is a Master, so on  

Single Evaporator systems no change is  

required.

  •   No. of Defrost per Day - “

dFn” - 

A selection must 

be made for the number of defrosts cycles per  

day – 1,2,3,4,5,6,8,10 or 12 per day. If no  

Programming & Reviewing

Programming And Reviewing Settings / Changes (cont’d.)

Use the 

“PROGRAM REVIEW”

 button to select these items:

selection is made, Defaults: electric defrost 4 per  

day and air defrost 2 per day.

  •   Defrost fail-safe - 

“dFF” 

- This is the maximum 

time allowed for a coil to remain in defrost. 

Defrost will be terminated if the defrost end  

temperature is not attained when this time  

has expired. On multiple evaporator systems this  

is controlled by the Master unit. Each board  

should have the same setting. Defaults: electric  

defrost 30 minutes and air defrost 40 minutes.

  •   Defrost End Temperature - “

dFt” 

- This is the 

temperature at which the Defrost will be  

terminated. Defaults: electric d60°F and  

air D45°F.

  •   Defrost Delay Start Time - 

“dFS”

 - This allows 

the delay of the start of the first defrost. Defaults: 

0.5 hours to 23.5 hours.

  •   Alarm High Temperature - “

ALH” 

- Temperature 

at which a high box temperature alarm will be  

triggered. This does not apply during defrost.  

Defaults: electric d5°F and air defrost  

+50°F.

  •   Alarm Low Temperature - 

“ALL” 

- Temperature

at which a Low Box Temperature alarm will be  

triggered. Defaults: Electric Defrost -15°F and Air  

D30°F.

  •   Alarm Time - 

“ALt” 

- Time which High  

Temperature or Low Temperature condition must  

exceed before alarm is triggered. Default:  

60 minutes.

  •   °F/°C - 

“F-C” 

- Select units to display 

temperature. Fahrenheit or Celsius. Default:  

Fahrenheit.

  •   When °C is selected a red dot will appear in the  
   

right bottom corner of the LED display of the  

Beacon II board.