Determine The Connection Points - Danfoss AK-PC 781A User Manual

10

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
fx Compressor 1
fx Compressor 2
fx Alarm relay
fx Main switch
fx P0
The connection survey from the controller and any extension
modules are uploaded from the paragraph "Module survey. E.g.
controller module:
Example continued
Signal
Discharge temperature - Sd
Suction gas temperature- Ss
Outdoor temperature - Sc3
External compressor stop
Thermostat sensor in plant room
- Saux1
Suction pressure - Po
Condensing pressure - Pc
Level switch, oil, comp.1
Level switch, oil, comp.2
Level switch, oil, comp.3
Level switch, oil, comp.4
Solenoid valve, oil , comp. 1
Solenoid valve, oil , comp. 2
Solenoid valve, oil , comp. 3
Solenoid valve, oil , comp. 4
Solenoid valve, oil, Separator
Circulation pump tw
Circulation pump hr
Room fan
Voltage signal to high pressure
valve, ICMTS
AK-PC 781A
On Point Function
x x Close
x x Close
x x NC
x x Close
x x AKS 32R 1-6 bar
Module Point
Terminal
1 (AI 1) 1 - 2
2 (AI 2) 3 - 4
3 (AI 3) 5 - 6
4 (AI 4) 7 - 8
5 (AI 5) 9 - 10
6 (AI 6) 11 - 12
7 (AI 7) 13 - 14
8 (AI 8) 19 - 20
9 (AI 9) 21 - 22
10 (AI 10) 23 - 24
1
11 (AI 11) 25 - 26
12 (DO 1) 31 - 32
13 (DO 2) 33 - 34
14 (DO 3) 35 - 36
15 (DO 4) 37 - 38
16 (DO 5) 39 - 40 - 41
17 (DO6) 42 - 43 - 44
18 (DO7) 45 - 46 - 47
19 (DO8) 48 - 49 - 50
24 -
25 -
Capacity controller RS8HE202 © Danfoss 2017-07
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.
- Columns 1, 2, 3 and 5 are used for the programming.
- Columns 2 and 4 are used for the connection diagram.
Signal type /
Signal
Active at
Pt 1000
Level switch, oil, receiver High
Pt 1000
Level switch, oil, receiver Low
Pt 1000
Level switch, oil, Separator
Closed
Level switch, CO2 receiver
Pulse reset of stopped compressor
Pt 1000
AKS 2050-59
Refrigerant receiver, Prec CO2
AKS 2050-159
Oil receiver, Prec Oil
Closed
Compressor 1
Closed
Compressor 2
Closed
Compressor 3
Closed
Compressor 4
ON
Start /stop of VLT for fans
ON
3-way valve, tap water, V3tw
ON
3-way valve, heat circuit, V3hr
ON
3-way valve, gas cooler, V3gc
ON
ON
ON
Signal
ON
Tap water temperature - Stw2
Tap water temperature - Stw3
0-10 V
Tap water temperature - Stw4
Tap water temperature - Stw8
Heat reclaim temperature Shr2
Heat reclaim temperature Shr3
Heat reclaim temperature Shr4
Heat reclaim temperature Shr8
Stepper signal to by-pass valve,
CCMT
Module Point
Mind the numbering.
The right-hand part of the
controller module may look like
a separate module. But it isn't.
Module Point
Terminal
1 (AI 1) 1 - 2
2 (AI 2) 3 - 4
3 (AI 3) 5 - 6
4 (AI 4) 7 - 8
5 (AI 5) 13 - 14
6 (AI 6) 15 - 16
7 (AI 7) 17 - 18
8 (AI 8) 19 - 20
2
9 (DO 1) 25 - 26 - 27
10 (DO 2) 28 - 29 - 30
11 (DO 3) 31 - 32 - 33
12 (DO 4) 34 - 35 - 36
13 (DO 5) 37 - 38 - 39
14 (DO6) 40 - 41 - 42
15 (DO7) 43 - 44 - 45
16 (DO8) 46 - 47 - 48
Module Point/Step Terminal
1 (AI 1) 1 - 2
2 (AI 2) 3 - 4
3 (AI 3) 5 - 6
4 (AI 4) 7 - 8
5 (AI 5) 9 - 10
6 (AI 6) 11 - 12
3
7 (AI 7) 13 - 14
8 (AI 8) 15 - 16
9 (step1) 25 - 26 - 27 - 28 CCM (ETS)
10 (step 2) 29 - 30 - 31 - 32
11 (step 3) 33 - 34 - 35 - 36
12 (step 4) 37 - 38 - 39 - 40
Continued next page
Signal type /
Active at
Closed
Closed
Closed
Open
Pulse
AKS 2050-159
AKS 2050-159
ON
ON
ON
ON
ON
ON
ON
ON
Signal type
Pt 1000
Pt 1000
Pt 1000
Pt 1000
Pt 1000
Pt 1000
Pt 1000
Pt 1000
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