Danfoss Optyma Plus V3.61 Manuel page 13

Manual
Control
Control of condensing pressure
Control of crankcase heater
Control of Fan Speed
Safety Parameter "Low
Pressure" for R448A / R449A /
R452A
Safety Parameter "High
Pressure" for R448A / R449A /
R452A
© Danfoss | DCS (CC) | 2022.12
Controller Installation
• The setpoint condensing temperature is calculated from the measured ambient temperature plus an
adjustable Temperature O set (called Reference) and controlled by the fan speed
• Factory setting of Reference = 8.0K
• The Reference is accessible by pressing short the middle button of the controller
• When Reference is shown, it can be modi ed with the upper or lower button
• Additionally to this the control of the condensing temperature can be limited by following
parameters:
"r82" = minimal condensing temperature (factory set: 10.0°C)
"r83" = maximal condensing temperature (factory set: 40.0°C)
• The controller optimizes the regulation of the crankcase heater itself. The heating power depends on
the ambient temperature and suction pressure and is controlled by Pulse Width modulation
• There is no change of parameters "P45", "P46" and "P47" necessary on site
• The fan speed is controlled by PI-control, depends on the actual value and the setpoint of the
condensing temperature
• There is no change of parameters "F14" and "F21" to be provided on site
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"Electronic" Safety - LP
"Mechanical" Safety - LP
"Mechanical" Safety - HP
"Electronic" Safety - LP
Suction Pressure
Discharge Pressure
BC08728642552802-001601
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