B
A
A
AB
AB
B
M
NOTE
THAT THERE IS AN EARTH CABLE
(WHEN PRESENT) TO DISCONNECT
WHEN REMOVING THE BOILER FRONT
PANEL. FREE SPACE FOR REMOVING
THE CONNECTOR IS ABOUT 400 MM.
REMEMBER TO CONNECT THIS EARTH
CABLE (WHEN PRESENT) WHEN PLACING
BACK THE BOILER FRONT PANEL AND TAKE
CARE THE WIRE DOES NOT GET STUCK
BETWEEN FRONT PANEL AND BOILER.
Routine servicing
3-port diverter valve
The 3-port diverter valve on the system pipework with the
valve ports is the following orientation, (
AB
) port iS System
boiler, (
A
) port hot water cylinder & (
B
) port heating system.
ATAG Heating Technology advises on an interim service inspection with a flue gas
analyser. A full strip down service is recommended at regular intervals or where
analyser readings are not within correct safety standards.
In order to perform maintenance, the following actions have to be taken:
• Switch off the electrical power to the boiler
• Remove the screws from the 2 fasteners (
A
) and (
B
)
• Unlock the fasteners (
A
) and (
B
) and remove the cover in a forward motion and
remove the earth cable from the cover
Air box/cover
The cover also doubles as air box:
• Clean the air box/cover with a cloth and a non-abrasive cleaner
2-port valve supplied
with unvented
!
A
B
C
!
AB: iS System boiler
A: DHW cylinder
B: Heating system
30
Summary of Contents for BC100124
Page 1: ...Appliance Technical Guide SERVICE ENGINEER EDITION ...
Page 24: ...PCB electrical diagram LMU 24 ...
Page 35: ...Notes 35 ...
