Pos. Description
Measurement
Point
Range Related Heatronic
Service Function
Tolerance
Remarks
6 Limit Tthermostat
Exchanger
Main heat
White socket on St9
White socket on St9
White socket on St9
White socket on St9
White socket on St9
White socket on St9
White socket on St15
Connector: 13 - 14
0 ? - - Limit = 110
ºC
6.3 Domestic hot water
temperature
sensor (DHW-NTC)
Connector: 1 - 3
20 ºC => 12 k?
60 ºC => 2,5 k?
A.b ± 0,5 k?
or can be
measured
on NTC
18 Pump
2.Speed
1.Speed
3.Speed
450 ?
340 ?
230 ?
-
-
-
±10 ? Measure
At pump
Connection
32 Ionization
Electrode
Connector: 12
Cable colour: green
Cable colour: red
Cable colour: yellow
(RAS 2,5:20 pole connector)
(RAS 5:3 pole connector)
(RAS 2,5:20 pole connector)
(RAS 2,5:20 pole connector)
(RAS 2,5:20 )pole connector
(RAS 2,5:20 )pole connector
(RAS 2,5:20 )pole connector
Cable colour: green
app. 4-5µA
36 CH flow
Temperature
Sensor (NTC)
Gas safety valve 1
Gas safety valve 2
Gas regulator valve
Connector: 1-8
20 ºC => 12 k?
60 ºC => 2,5 k?
± 0,5 k A.A ?
52
Connector: 17-18
Cable colour:black /
white
80 ? - ± 10 ?
52.1
Connector: 16-17
Cable colour:grey
black
187 ? - ± 20 ?
Connector 17
Common
(neutral)
Cut the
Voltage before
measurement
68
Connector: 19-20
Cable colour: blue
80 ?
min. 27 mA
max. 130 (mA
(max 165 mA for
LPG gases)
- ± 3 ?
151
Fuse T 2,5 A,
230 VAC
Transformator
On the fuse
0 ?
153
Input(230V)=48?
Input 9VDC:1?
Exit 25 VDC:1,4?
the trafo itself
Measure on
after
disassembling
5 ELECTRICAL VALUES
5.1 ZWC 21/24/28/30/35-3 MFA / MFAP / MFAE / MFAM and ZWE 24/28-5 MFA / MFAE types
6 720 660 238 (2008/07)
25
| 25Electrial Values
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