Technical data

34
17.0 electrical
connections
Plan of internal electrical connections
X1
X2
X3 X4 X5
Fuse 24V
X9
X6 X7 X8
6
5
HSP Top
6
RS 232
3
4
1
2
20
10
11
1
10 5
6
1
16
8
9
1
6
3
4
1
1 2
3
1
2
4
5
63
2
5
1
4
14 2 3
5 6
PRO1/MRO3
X16
1
2
Alarm contact
7
6
L
N
PE
L
N
3 4
1 2
PE
PE
3
52
4
1
PE
Ignition / Ionisation
X32
PE
PE
S1 S4 S3 S5
K3
K5
K6
K7
K5
K6
K7
K0
K0
K4
K8
K6
K0
K7
K7
K14
K3
K9
K9
K8
K8
K18
K12
K19
K17
K20
K20
X10
X12
X14
X13
12
1
1
2
2
2
2
2
111
X17
X18
X19
X20
X21
Fan
Limit Thermostat
Water
Limit Thermostat
Fluegas
Burner Fan
24 VDC
X26
X27
X28
X29
X22
X23
X30
X31
X25
Gas Valve
L
PE N
N
L
L
PE
N
X41
Supply
230 VAC
Pump 1
Boiler
Transformer
KO = white K2 = brown K3 = green K4 = grey K5 = orange K6 = blue K7 = red K8 = black
K9 = violet K12 = yellow/white K13 = brown/white K14 = green/white K17 = blue/white K18 = red/white K19 = black/white K20 = violet/white
1
2
3
4
R1
R2
R3
Flow temperature sensor
DHW Flow water sensor
(S-models only)
DHW Inlet water sensor
(S-models only)
Return temperature sensor
not used
RE2132
Outside temperature sensor
DHW Thermostat or DHW Temperature sensor
3-way divertor
valve
3-way divertor valve or pump
(H-models only)
Room thermostat or MR03
External gas valve or external pump
Fuse 230VAC
Fuse
230VAC