8
User
Guide RS8GY302 © Danfoss 2015-06
AK-PC
551
Start/stop
Main switch
Main switch
Start and stop regulating here.
The configuration settings will require that regulating is stopped.
If you try to enter a configuration setting when regulating has started, the controller will
ask if regulating should be stopped.
When all settings have been made and the main switch is set to “ON”, the controller will
enable the display of the various measurements. Regulation will start. (If an external main
switch has been defined, it must also be “ON” before regulating starts.)
On / Off
Extern Main swich
External main switch
It is possible to connect an external switch which can be used to start and stop regulating.
Both the internal and external main switch must be ON before regulating starts.
An external main switch can be defined in the menu “Plant type” - “Main switch via DI”.
Plant type
Select Plant type
Plant settings:
The following must be regulated:
• Compressor group
• Condenser group
• One compressor group (A) + One condenser group
• Two compressor groups (A) and (B) + One condenser group
Fac: None
Refrigerant type
Refrigerant setting
Before refrigeration is started, the refrigerant must be defined. You may choose between
the following refrigerants:
R12, R22, R134a, R502, R717, R13, R13b1, R23, R500, R503, R114, R142b, user defined,
R32, R227, R401A, R507, R402A, R404A, R407C, R407A, R407B, R410A, R170, R290, R600,
R600a, R744, R1270, R417A, R422A, R413A, R422D, R427A, R438A, R513A (XP10), R407F.
Warning: Wrong selection of refrigerant may cause damage to the compressor.
Other refrigerants: Here Setting "user defined" is selected and then three factors - fac1, fac2
and fac3 and temperature glide (if necessary).
Fac: None
Unit of setpoints
Device for controlling compressor and condenser
Select pressure or saturation temperature.
(Can be set during initial set-up and must not be subsequently changed.)
Temp. / press
Fac: Saturated
Night signal via DI
Night time operation via DI signal
Define an external switch here, so that the regulation reference can be raised and lowered
externally.
1. Set the function to “Yes”
2. Go to I/O configuration and select an available digital input. Set this input to
“Night condition”
3. Next, define whether the function is to be active when the signal is ON, or when it is OFF.
DI-demand
No / Yes
Fac: No
Main Switch via DI
Main switch via DI
Define an external main switch here, so that regulation can be started and stopped
externally.
1. Set the function to “Yes”
2. Go to I/O configuration and select an available digital input. Set this input to “Main switch”
3. Next, define whether the function is to be active when the signal is ON, or when it is OFF.
DI-demand
No / Yes
Fac: No
Mains frequency
Frequency
Set the net frequency
50 Hz / 60 Hz
Fac: 50 Hz
Alarm output
Alarm relay
Define an alarm relay here that will be activated in the event of an alarm.
1. Select the alarm priority that will activate the relay
• No relay
• Critical alarm
• Severe alarm
• All alarms
2. Go to I/O configuration and select an available digital output. Set this output to “Alarm”
3. Next, define whether the relay will be active (pulled) when the alarm is ON, or when it is
OFF.
DO-demand
Fac: No relay
Alarm buzzer
Alarm sound
Here the sound generator can be defined to emit a sound in the event of an alarm.
Select which alarm priority will activate the sound generator:
• No buzzer
• Critical alarm
• Severe alarm
• All alarms
(In the event of an alarm, the sound generator can be stopped by moving across the
active alarm screen; see page 6)
Fac: No buzzer
Suction A
Control status
Regulation status
Menu
SW: 1.5x
