Setup Control Of High Pressure - Danfoss AK-PC 781A User Manual

Configuration - continued
Setup control of high
pressure
1. Go to Configuration menu
2. Select HP control
3. Set regulation values
64
The settings are shown here in the
display
Warning
If the regulation is stopped dur-
ing high-pressure regulation, the
pressure will rise.
The system must be dimen-
sioned to the higher pressure;
otherwise, there will be a loss of
charge.
Capacity controller RS8HE202 © Danfoss 2017-07
3 - HP control
Vhp output type
Select the signal type for controlling the ICMTS valve.
- Voltage signal (ICMTS must have 0-10 V signal)
- Stepper motor signal via AK-XM 208C
- 2 Stepper motor signals for parallel valves
Extra capacity offset
Adjust how much the pressure shall be increased by when
the function "Extra capacity offset" is activated.
Pgc min.
Min. acceptable pressure in the gas cooler
Pgc max.
Max. acceptable pressure in the gas cooler
Advanced settings
Pgc max. limit P-band
P-band under "Pgc max" where the valve's degree of
opening is increased
dT Subcool
Desired subcooling temperature
Kp
Amplification factor
Tn
Integration time
Valve min. OD
Restriction of the ICMTS valve's degree of closing
Valve max. OD
Restriction of the ICMTS valve's degree of opening
Pgc HR min.
Read the min. acceptable pressure in the high pressure
circuit during heat recovery
Pgc HR offset
Read the pressure increase during heat recovery
Ramp down bar/min.
Here you may select how quickly the reference must be
changed after a completed heat recovery
Temp. at 100 bar
Temperature at 100 bar. Here you may define the
regulation curve during transcritical operation. Set the
required temperature value.
V3gc
Indicates whether a gas bypass valve is used on the gas
cooler.
Bypass low limit
If the sensor Sgc records a temperature that is lower
than the selected value, the gas will be routed outside
of the gas cooler (e.g. startup during very low ambient
temperatures).
Bypass permitted after
Minimum time during which the gas must be fed
through the gas cooler before bypass is permitted.
AK-PC 781A