Electrical Values - Buderus Logamax GB062-24 KDE H V2 Service Manual

5
Electrical values, gas conversion and boiler layout

Electrical values

5.3.2
Electrical values for Logamax GB062...
Pos. Description
8 3 Way valve motor
9 Pump (3 Step )
9 Modulating pump
16 Domestic hot water
temperature sen-
sor (DHW-NTC)
20 Air-Pressure-
Switch (APS)
1 Gas valve
18 Flue gas tempera-
ture limiter (AGÜ)
2 Flow - sensor or
boiler temperature
sensor
4 Flame sensing
(ionisation) elec-
trode
5 Temperature lim-
iter for heat
exchanger (STB)
Tab. 12 Electrical values
44
Measurement Point
Pin : 2 -3
EV1 (Pin : 3-4)
EV2 (Pin : 1-3)
Measure on the PCB or
electode
Expected value
70 Ohm
I : 475 Ohm
II : 340 Ohm
III : 210 Ohm
4,0 MOhm
20 ºC => 12,17 kOhm
60 ºC => 2,98 kOhm
Workingspressure : 3,88
/ 3,53 mbar.
100 Ohm
230 Ohm
0 Ohm
20 ºC => 14,77 kOhm
80 ºC => 1,7 kOhm
> 20 µA
0 Ohm
Service
Func- Toler-
tion ance Remark
± 5 measure on the
Ohm motor socket
± 10 Measure on the
Ohm pump socket.
± 1 Measure on the
KOhm pump socket.
Functiontest with
service function
t03.
A.B ± 0,5 or measure on
kOhm the sensors
(NTC) self.
measure on APS.
PIN 1 -2 is closed
(default)
Supply 24 VDC
±10
Ohm
- Temperatur limit
= 120 ºC
A.A ± 0,5
kOhm
F.2 -
- Temperatur limit
= 115 ºC (+10/-
14)
Logamax Plus GB062