Set Oil Management - Danfoss ADAP-KOOL AK-HP 780 Design Manual

Configuration - continued

Set oil management

1. Go to Configuration menu
2. Select Oil management
3. Set refrigeration circuit
4. Set regulation methods
Press the +-button to go on to the
next page
AK-HP 780
In our example, oil management is selected
We do not use safety relays in our example.
In this example, we want to control the oil
receiver.
This is done with a pressostat. Here, we have
chosen a pressostat.
The pressostat should be set as follows:
- Select pressure transmitter
When the pressure drops in the receiver, the
valve should open.
- Set the pressure level at which the valve
should open. Set at 30 bar, here.
- Set the pressure level, at which the valve
should close completely again. Set at 35 bar,
here.
In the example, we have two level switches in
the receiver. Both one high and one low.
Heat pump controller RS8GF202 © Danfoss 2015-08
4
Oil management
Select whether you wish to activate oil
management.
Oil control safety relay
Oil control safety relay
If this setting is set to YES, the controller will
reserve a safety relay for each compressor. The
relay terminal is connected in series to the
compressor relay. The relay can hereby stop the
compressor, if a lack of oil is registered when
the compressor is force controlled. (Forced con-
trolled to ON with the setting "Manual" or with
the "changeover" on an extension module.)
Danfoss recommends this function to avoid any
compressor damages due to lack of care.
(In order to keep things simple, this function is
not used as an example.)
Oil receiver
Select whether you wish to activate pressure
regulation in one of the oil receivers.
Level switch receiver
Define the desired level sensors. Only High /
High and low
Level alarm delay
Delay time tor level alarm
Input for pressure build
Select whether the pressure is controlled by a
pressostat or signal from the pulse counter.
Comp. per. to start seq.
(For pulse counter): Percentage value of total
pulses of the different compressors
Pressure buildup seq.
(For pulse counter) Select between:
Only pulses from the HP circuit. Pulses from
both HP and LP are included
Actual pressure
Measured value
Actual state
Status of oil separation
Cut out pressure
Receiver pressure for shutting off oil
Cut in pressure
Receiver pressure for turning on oil
High alarm limit
An alarm is given if a higher pressure is
registered
High alarm delay
Time delay for alarm
High alarm text
Write an alarm text
Low alarm limit
An alarm is given if a lower pressure is
registered
Low alarm delay
Time delay for alarm
Low alarm text
Write an alarm text
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