Heatcraft Refrigeration Products II - Manual (Page 18)

18
Beacon II Controller
Programming And Reviewing Settings/Changes (continued)
Use the “PROGRAM REVIEW” button to select these items:
• 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 R22 and for electric defrost it is R404A. All units are shipped with
factory default settings.
• Refrigerant Type – “rEF” – Selection for type of refrigerant – R22, R404A or R507.
Default: Air defrost is R22 and for electric defrost is R404A.
• Box Temperature – “bot” – Select box temperature setpoint. Selection range is -30°F to +70-°F.
Default: Electric defrost -10 ° F and air defrost +35 ° F.
• Superheat – “SUP” – Evaporator superheat is controlled by the board on each evaporator. Each board
measures 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.
Default: MASTER on each board. For a single evaporator system, no change is required.
• Number of Defrosts 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 selection is made:
Default: Electric defrost is 4 per day and air defrost is 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.
Default: Electric defrost is 30 minutes and air defrost is 40 minutes.
• Defrost End Temperature – “dFt” – This is the temperature at which the defrost will be terminated.
Default: Electric defrost is +60 ° F and air defrost is +45 ° F.
• Defrost Delay Start Time – “dFS” – This allows the delay of the start of the defrost.
Default: 0.5 hours to 23.5 hours.
PROGRAM
REVIEW