AK-HP 780
Heat pump controller RS8GF202 © Danfoss 2015-08
33
Determine the connection points
All connections must be programmed with module and point, so
in principle it does not matter where the connections are made, as
long as it takes place on a correct type of input or output.
• The controller is the first module, the next one is 2, etc.
• A point is the two or three terminals belonging to an input or
output (e.g. two terminals for a sensor and three terminals for a
relay).
The preparation of the connection diagram and the subsequent
programming (configuration) should take place at the present
time. It is most easily accomplished by filling in the connection
survey for the relevant modules.
Principle:
Name
On module
On Point
Function
fx Compressor 1
x
x
Close
fx Compressor 2
x
x
Close
fx Alarm relay
x
x
NC
fx Main switch
x
x
Close
fx P0
x
x
AKS 32R 1-6 bar
The connection survey from the controller and any extension
modules are uploaded from the paragraph "Module survey. E.g.
controller module:
Module Point
10
Mind the numbering.
The right-hand part of the
controller module may look like
a separate module. But it isn’t.
- Columns 1, 2, 3 and 5 are used for the programming.
- Columns 2 and 4 are used for the connection diagram.
Signal
Module
Point
Terminal
Signal type /
Active at
Discharge temperature - Sd
1
1 (AI 1)
1 - 2
Pt 1000
Suction gas temperature- Ss
2 (AI 2)
3 - 4
Pt 1000
Compressor control - Sctrl
3 (AI 3)
5 - 6
Pt 1000
External main switch
4 (AI 4)
7 - 8
Closed
"Pump control" - S7
5 (AI 5)
9 - 10
Pt 1000
Suction pressure - P0
6 (AI 6)
11 - 12
AKS 2050-59
Discharge pressure - Pd
7 (AI 7)
13 - 14
AKS 2050-159
Level switch, oil, comp.1
8 (AI 8)
19 - 20
Closed
Level switch, oil, comp.2
9 (AI 9)
21 - 22
Closed
Level switch, oil, comp.3
10 (AI 10)
23 - 24
Closed
Level switch, oil, comp.4
11 (AI 11)
25 - 26
Closed
Solenoid valve, oil , comp. 1
12 (DO 1)
31 - 32
ON
Solenoid valve, oil , comp. 2
13 (DO 2)
33 - 34
ON
Solenoid valve, oil , comp. 3
14 (DO 3)
35 - 36
ON
Solenoid valve, oil , comp. 4
15 (DO 4)
37 - 38
ON
Solenoid valve, oil, Receiver
16 (DO 5)
39 - 40 - 41
ON
17 (DO6)
42 - 43 - 44
ON
Alarm
18 (DO7)
45 - 46 - 47
OFF
Room fan
19 (DO8)
48 - 49 - 50
ON
AKD compressor control
24
-
0-10 V
AKD pump control
25
-
0-10 V
Signal
Module
Point
Terminal
Signal type /
Active at
Level switch, oil, receiver High
2
1 (AI 1)
1 - 2
Closed
Level switch, oil, receiver Low
2 (AI 2)
3 - 4
Closed
Level switch, oil, Separator
3 (AI 3)
5 - 6
Closed
Level switch, CO2 receiver
4 (AI 4)
7 - 8
Open
Pulse reset of stopped compressor
5 (AI 5)
13 - 14
Pulse
Thermostat sensor in engine room
- Saux1
6 (AI 6)
15 - 16
Pt 1000
7 (AI 7)
17 - 18
Oil receiver, Prec
8 (AI 8)
19 - 20
AKS 2050-159
Compressor 1
9 (DO 1)
25 - 26 - 27
ON
Compressor 2
10 (DO 2)
28 - 29 - 30
ON
Compressor 3
11 (DO 3)
31 - 32 - 33
ON
Compressor 4
12 (DO 4)
34 - 35 - 36
ON
Start signal to AKD for the pump
13 (DO 5)
37 - 38 - 39
ON
14 (DO6)
40 - 41 - 42
15 (DO7)
43 - 44 - 45
16 (DO8)
46 - 47 - 48
Signal
Module
Point
Terminal
Active at
Compressor 1 Gen. Safety
3
1 (DI 1)
1 - 2
Open
Compressor 2 Gen. Safety
2 (DI 2)
3 - 4
Open
Compressor 3 Gen. Safety
3 (DI 3)
5 - 6
Open
Compressor 4 Gen. Safety
4 (DI 4)
7 - 8
Open
5 (DI 5)
9 - 10
All compressors common safety
6 (DI 6)
11 - 12
Open
7 (DI 7)
13 - 14
8 (DI 8)
15 - 16
Example continued
Note
The safety relays should not be fitted onto a module
with override changeovers, as they can be put out of
operation by an incorrect setting.
Signal
Module
Point
Terminal
Signal type /
Active at
1 (AI 1)
1 - 2
2 (AI 2)
3 - 4
3 (AI 3)
5 - 6
4 (AI 4)
7 - 8