Setup Control Of High Pressure - Danfoss AK-PC 772A User Manual

Configuration - continued

Setup control of high pressure

1. Go to Configuration menu
2. Select HP control
3. Set regulation values
AK-PC 772A
The settings are shown here in the
display
(The read outs "Pgc HR min" and
"Pgc HR offset" are visible when
Heat recovery is selected ON)
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 RS8HF102 © Danfoss 2017-07
3 - HP control
Vhp output type
Select the signal type for controlling the high pressure
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
Vhp min. OD
Restriction of the valve's degree of closing
Vhp max. OD
Restriction of the valve's degree of opening
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
Pgc HR min.
Read the min. acceptable pressure in the high pressure
circuit during heat recovery
Pgc HR offset
Set 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.
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