5.
Undo screws
D
and pull out plate-
type heat exchanger
C
to the
front.
6.
Check the DHW connections for
scaling and, if required, replace the
plate-type heat exchanger.
7.
Check the heating water connec-
tions for contamination and, if
required, flush via central heating
return
G
(flushing system for
plate-type heat exchanger, see pri-
celist).
8.
Lubricate the new gaskets/seals.
Install in reverse order with new
gaskets.
Checking the outside temperature sensor (weather-compen-
sated control unit)
1.
Pull plug "X3" from the control unit.
2.
Test the resistance of the outside
temperature sensor across term-
inals "X3.1" and "X3.2" on the dis-
connected plug and compare it with
the curve.
Repairs
(cont.)
90
Troubleshooting
5592
817
GB
Summary of Contents for VITOPEND 200
Page 12: ...Opening the control unit casing 12 Installation sequence 5592 817 GB...
Page 16: ...Fitting the programming unit into the control unit 16 Installation sequence 5592 817 GB...
Page 17: ...Fitting the front panel 17 Installation sequence 5592 817 GB Installation...
Page 113: ...Connection and wiring diagram internal connections 113 Designs 5592 817 GB Service...
Page 119: ...Parts lists cont 119 Parts lists 5592 817 GB Service...
Page 120: ...Parts lists cont 120 Parts lists 5592 817 GB...
Page 121: ...Parts lists cont 121 Parts lists 5592 817 GB Service...
Page 122: ...Parts lists cont 122 Parts lists 5592 817 GB...
Page 130: ...130 5592 817 GB...
Page 131: ...131 5592 817 GB...