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Configuration - continued
8. Set monitoring of compressor
Press the +-button to go on to the
next page
9. Set operation time for compres-
sor
Press the +-button to go on to the
next page
10. Set times for safety cutouts
Press the +-button to go on to the
next page
11. Set Misc. functions
52
In our example we use:
- Common high-pressure pressure
control for all compressors
- One general safety monitoring
unit for each compressor
(The remaining options could
have been selected if specific
safety controls for each
compressor had been required).
Set min. OFF-time for the com-
pressor relay
Set min. ON-time for the com-
pressor relay
Set how often the compressor is
allowed to start
The settings only apply to the
relay that cuts the compressor
motor in and out.
They do not apply to unloaders.
If the restrictions overlap, the
controller will use the longest
restriction time.
In our example we do not use these
functions.
Heat pump controller RS8GF202 © Danfoss 2015-08
P0 Min limit
Minimum value for the suction pressure in °C
If the limit is reduced, the entire compressor capacity will be
cutout.
P0 Max alarm
Alarm limit for high suction pressure P0
P0 Max delay
Time delay before alarm for high suction pressure P0.
Safety restart time
Common time delay before restarting the compressor.
(Applicable to the functions: "Sd max limit", "Pd max limit"
and "P0 min limit").
SH Min alarm
Alarm limit for min. superheat in suction line.
SH Max alarm
Alarm limit for max. superheat in suction line.
SH alarm delay
Time delay before alarm for min./max. superheat in suction
line.
8 - Compressor safety
Common safety
Choose whether an overall, common safety input for all
compressors is desired. If the alarm is activated, all compres-
sors will be cutout.
Oil pressure etc
Define here whether this type of protection should be con-
nected.
For "General", there is a signal from each compressor.
9 - Minimum operation times
Configure the operation times here so "unnecessary opera-
tion" can be avoided.
Restart time is the time interval between two consecutive
starts.
10 - Safety timer
Cutout delay
The time delay resulting from drop-out of automated safety
measures and until the compressor-error is reported. This
setting is common for all safety inputs for the relevant
compressor.
Restart delay
Minimum time that a compressor should be OK after a safety
cut-out. After this interval it can start again.
11 - Misc. functions
(Currently, there are no functions.)
AK-HP 780
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