AK-PC 781A Capacity controller RS8HE202 © Danfoss 2017-07 65
Setup control of receiver
pressure
1. Go to Configuration menu
2. Select Receiver control
3. Set regulation values
The settings are shown here in
the display
3 - Receiver control
Vrec output type
Select the signal type for controlling the gas bypass valve:
- Voltage signal
- Stepper motor signal via AK-XM 208C
- 2 stepper motor signal for parallel valves
Valve min. OD
Limitation of the CCM valve's degree of closing
Valve max. OD
Limitation of the CCM valve's degree of opening.
Prec set point
Select the set point for the pressure in the receiver
Use ext. ref. offset
A 0-10 V signal must displace the temperature reference.
Max. ext. ref. offset
Reference displacement at max. signal (10 V)
Kp
Amplification factor
Tn
Integration time
Prec min.
Min. permissible pressure in the receiver
Prec max.
Max. permissible pressure in the receiver
(Also becomes regulation reference if the compressors are
stopped with the "External compressor stop" function)
Prec min. limit P-band
P-band under "Prec min" where the ICMTS valve's degree of
opening is increased
Prec max. limit P-band
P-band over "Prec max" where the ICMTS valve's degree of
opening is decreased
Use hot gas dump
Select whether hot gas should be supplied if the receiver
pressure falls too low
Prec hot gas dump
Receiver pressure at which hot gas is turned on
Prec gas dump diff.
Difference at which hot gas is turned off again
IT comp. state
The signal received from the IT controller can be read here
IT comp. start
Opening degree for the Vrec valve when the IT compressor
is to start.
IT comp. delay
The opening degree of the Vrec must be higher during the
entire delay time before the relay pulls, thereby sending a
signal to the IT controller.
IT comp. Sgc min.
The temperature limit for operation with IT compressor. Will
not start when a lower value is detected, regardless of the
opening degree of the Vrec valve.
Configuration - continued
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