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Section C
Connections
Section D
Connections
Section E
Connections
To be continued on next page.
AHU Kit – Installation Instructions – 11/2021
No.
Name
In / Out
Allocation
10
ON6
O
Recirculat. Operation
9
ON5
O
Heating Operation
8
ON4
O
Cooling Operation
7
ON3
O
Thermostat ON
6
ON2
O
Defrost Operation
Potential for ON2
5
ON1
O
to ON6 (12 V DC)
4
COM
I
Potential for DI1 to DI3
3
DI3
I
Digital Input 3
2
DI2
I
Digital Input 2
1
DI1
I
Digital Input 1
No.
Name
In / Out
Allocation
10
BLIND
Unused
9
HU2
O
No polarity
8
HU1
O
No polarity
7
2Z-7
I
Potential for OP3
6
OP3
I
Fan Alarm
5
1Z-3
O
No polarity
4
1Z-5
O
No polarity
3
I
Protective earth
2
N
I
Neutral
1
L
I
Live
No.
Name
In / Out
Allocation
10
M1-6
I
WHT
9
M1-5
I
GRY
8
M1-4
I
BLK
7
M1-3
I
YEL
6
M1-3
I
RED
5
M1-1
I
ORG
4
R2
I
No polarity
3
R1
I
No polarity
2
U2 (OC)
I
No polarity
1
U1 (OC)
I
No polarity
Function
Comment
Status Outputs
Internal Potential: 12 V DC
2 types of usage:
a) Potential-free:
Digital Inputs
Keep S3 of CZ-CAPBC 2/ ACC-SP1A on
(For information on functionality refer
"NON VOLTAGE".
to section "Terminal layout – CZ-CAP-
b) 12 to 24 V DC, 10 mA external:
BC2 / ACC-SP1A" in this document)
Change S3 of CZ-CAPBC2 / ACC-SP1A
to "VOLTAGE".
Function
Comment
Internal Potential:
External Humidifier Control
230 V AC / max. 3 A
Fan Alarm Input
(Unit will only operate if this contact is
Internal Potential: 230 V AC
closed, otherwise error code P01 will
be displayed.)
External Potential:
Fan Start – Stop Signal
max. 230 V AC / 5 A
Protective Earth Conductor
Neutral Terminal
External Potential:
Live Terminal
230 V AC, max. 1 A
Function
Comment
Required only for PAW-160MAH2(L/M) and
PAW-280MAH2(L/M)
Expansion valve
(only ECOi and ECO G)
Terminal for Group Wiring
Internal Potential: 16 V DC
(RC connection)
Communication bus wiring
Electrical Wiring
5
67
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