Buderus 600 - 11S Installation And Servicing Instructions page 48

5 Servicing
Detach the fan by loosening the 2 x 2 screws on the
connection unit.
Replace the fan.
Refit by following the above procedure in reverse.
NOTE
Once installation has been completed
successfully, carry out leak testing as per
subsection 2.1.2.
5.3.6 Checking the wiring connections of the UBA
Disconnect the system from the power supply.
Loosen crosshead screw on UBA housing.
Swivel UBA housing downwards.
Open the UBA housing.
Check all cable terminals for tightness and
resecure/retighten as required.
Shut the UBA housing.
Swivel the UBA housing upwards and screw into place.
Connect system to mains power supply.
5.3.7 Checking the mains supply
If the mains supply is interrupted or seems faulty, carry out a
power test procedure for safe testing of the mains electrical
supply.
Loosen crosshead screw on UBA housing.
Swivel UBA housing downwards.
Open the UBA housing.
Carry out the power test procedure (see fig. 63, item 1).
Shut the UBA housing.
Swivel the UBA housing upwards and screw into place.
Connect system to mains power supply.
Subject to modifications resulting from technical improvements!
48 Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004
Fig. 61 Replacing the fan on the 600 Series:
replace the fan
Fig. 62 Checking the wiring connections of the UBA
1
Fig. 63 Checking the mains supply
Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk