Wiring - Danfoss AK-PC 781A User Manual

Mounting and wiring - continued

Wiring

Decide during planning which function is to be connected and
where this will be.
1. Connect inputs and outputs
Here are the tables for the example:
Signal Module
Discharge gas temperature - Sd
Suction gas temperature - Ss
Outdoor temperature - Sc3
External compressor stop
Thermostat sensor in plant room
- Saux1
Suction pressure - P0
Condenser 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
Signal Module
Level switch, oil, receiver High
Level switch, oil, receiver Low
Level switch, oil, Separator
Level switch, CO2 receiver
Pulse reset of stopped compressor
Refrigerant, receiver, Prec CO2
Oil receiver, Prec Oil
2
Compressor 1
Compressor 2
Compressor 3
Compressor 4
Start /stop of VLT to fans
3-way valve, tap water, V3tw
3-way valve, heat circuit, V3hr
3-way valve, gas cooler, V3gc
Signal Module
Tap water temperature - Stw2
Tap water temperature - Stw3
Tap water temperature - Stw4
Tap water temperature - Stw8
Heat reclaim temperature Shr2
Heat reclaim temperature Shr3
3
Heat reclaim temperature Shr4
Heat reclaim temperature Shr8
Stepper signal to by-pass valve,
CCMT
46
Point Signal type /
Terminal
1 (AI 1) 1 - 2 Pt 1000
2 (AI 2) 3 - 4 Pt 1000
3 (AI 3) 5 - 6 Pt 1000
4 (AI 4) 7 - 8 closed
5 (AI 5) 9 - 10
Pt 1000
6 (AI 6) 11 - 12 AKS 2050-59
7 (AI 7) 13 - 14
AKS 2050-159
8 (AI 8) 19 - 20 closed
9 (AI 9) 21 - 22 closed
10 (AI 10) 23 - 24 closed
1
11 (AI 11) 25 - 26 closed
12 (DO 1) 31 - 32 ON
13 (DO 2) 33 - 34
ON
14 (DO 3) 35 - 36 ON
15 (DO 4) 37 - 38 ON
16 (DO 5) 39 - 40 - 41 ON
17 (DO6) 42 - 43 - 44
ON
18 (DO7) 45 - 46 - 47 ON
19 (DO8) 48 - 49 - 50 ON
24 - 0-10 V
25 -
Point Signal type /
Terminal
1 (AI 1) 1 - 2 closed
2 (AI 2) 3 - 4 closed
3 (AI 3) 5 - 6 closed
4 (AI 4) 7 - 8 Open
5 (AI 5) 13 - 14 Pulse
6 (AI 6) 15 - 16
7 (AI 7) 17 - 18 AKS 2050-159
8 (AI 8) 19 - 20 AKS 2050-159
9 (DO 1) 25 - 26 - 27
ON
10 (DO 2) 28 - 29 - 30 ON
11 (DO 3) 31 - 32 - 33 ON
12 (DO 4) 34 - 35 - 36 ON
13 (DO 5) 37 - 38 - 39 ON
14 (DO6) 40 - 41 - 42 ON
15 (DO7) 43 - 44 - 45
ON
16 (DO8) 46 - 47 - 48 ON
Point/Step Terminal Signal type
1 (AI 1) 1 - 2 Pt 1000
2 (AI 2) 3 - 4 Pt 1000
3 (AI 3) 5 - 6 Pt 1000
4 (AI 4) 7 - 8
Pt 1000
5 (AI 5) 9 - 10 Pt 1000
6 (AI 6) 11 - 12 Pt 1000
7 (AI 7) 13 - 14 Pt 1000
8 (AI 8) 15 - 16 Pt 1000
9 (step 1) 25 - 26 - 27 - 28 CCMT (ETS)
10 (step 2) 29 - 30 - 31 - 32
11 (step 3) 33 - 34 - 35 - 36
12 (step 4) 37 - 38 - 39 - 40
Capacity controller RS8HE202 © Danfoss 2017-07
Remember the isolation amplifier
If signals are received from different controls, e.g. heat re-
covery for one of the inputs, a galvanically insulated module
should be inserted.
Active at
The function of the switch functions can be seen in the last column.
There are pressure transmitters AKS 32R and AKS 2050 available for
several pressure ranges.
Here there are two different ones. One up to 59 bar and two up to 159
bar.
Signal
Active at
Compressor 1 Gen. safety
Compressor 2 Gen. safety
Compressor 3 Gen. safety
Compressor 4 Gen. safety
Start/stop heat recovery hr
All comp. common safety
Flow switch FStw
Flow switch FShr
Signal
Temp. gas cooler outlet Sgc
Temp. by-passed gas Shp
Start/stop heat recovery tw
Gas cooler pressure Pgc
Speed control, compressor
Speed control, gas cooler fans
Speed control, pump - tw
Speed control, pump - hr
Module Point Terminal
1 (DI 1) 1 - 2
2 (DI 2) 3 - 4
3 (DI 3) 5 - 6
4 (DI 4) 7 - 8
4
5 (DI 5) 9 - 10
6 (DI 6) 11 - 12
7 (DI 7) 13 - 14
8 (DI 8) 15 - 16
Module Point Terminal
1 (AI 1) 1 - 2
2 (AI 2) 3 - 4
3 (AI 3) 5 - 6
4 (AI 4) 7 - 8
5
5 (AO 1) 9 - 10
6 (AO 2) 11 - 12
7 (AO 3) 13 - 14
8 (AO 4) 15 - 16
Active at
Open
Open
Open
Open
closed
Open
Open
Open
Signal type
Pt 1000
Pt 1000
closed
AKS 2050-159
0 - 10 V
0 - 10 V
0 - 10 V
0 - 10 V
AK-PC 781A