Danfoss ADAP-KOOL AK-HP 780 Design Manual page 54

Configuration - continued
5. Set oil management for the
compressors
Press the +-button to go on to the
next page.
6. Set oil separator
54
In our example, the oil supply is controlled
separately for each individual compressor.
The settings are shown here in the diagram.
The process is as follows:
20 seconds after the signal from the level
switch is given, the oil injection starts.
This pulsates three times with one minute
intervals. Each pulse lasts one second. Then
there is a pause for 20 seconds. If the level
switch has not registered any oil at this point,
the compressor is stopped.
In our example, there is only one single
separator that has just one level switch.
The settings are shown here in the diagram.
The process is as follows:
When a signal is given from the level switch,
the discharging process to the receiver
commences. This pulsates three times with
one minute intervals. Each pulse lasts one
second. If the level switch does not register an
oil drop at this point, an alarm is given when
the delay time has expired.
Heat pump controller RS8GF202 © Danfoss 2015-08
5
Compressor oil setup
Select whether the oil supply to all the
compressors is to be shared at the same time
or whether each compressor is to be controlled
separately.
Oil cycle pre delay
(Prel period) Oil pulses will start after a stable
signal from the level switch in the entire delay
time.
Oil cycle post delay
(Prel period) Oil pulses will stop after a stable
signal from the level switch in the entire delay
time. (Alarm if the level switch is still giving a
signal for more oil.)
High oil alarm delay
If an activation of the level switch is not
registered before the time has expired, an
alarm will be given. (the compressor not use
the oil).
No of periods
No. of pulses that are to be enabled in a oil
filling sequence
Period time
Time between pulses
Oil valve open time
The valve's opening time for each pulse.
6
Separator
Select whether there should be one shared
separator for all the compressors or one
separator for each compressor.
Level detection
Select whether the separator is to be controlled
by one or two level switches.
Level alarm delay
Alarm given when using a level switch for low
level.
Repeat oil return cycle
Time period between repeat emptying
processes from the separator if the level switch
stays at high level.
No oil sep. alarm delay
Alarm delay when a signal is given that oil is
not being separated ("high" level contact not
activated)
No of periods
No. of times the valve should open in emptying
sequence
Period time
Time between valve openings.
Open time
The open time of the valve
AK-HP 780