Servicing
5
Installation and servicing instructions condensing gas boiler 800 - 24/29/43/60 and 800 - 24T25/29T25 H/V • edition 02/2006
57
Subject to modifications resulting from technical improvements !
Buderus • http://buderus-domestic.co.uk
5.3.22 Checking the controller connections at the boiler
z
Set the mains switch to “
0
”.
z
Remove loop (non-conductive) from terminals 1 and 2.
z
Loosen cable at terminals 3 and 4.
z
Fit a link between terminals 1 and 2, 3 and 4.
z
Set the mains switch to “
I
” and press “reset”.
z
If the 800 Series goes into standby mode after start-up
(display
0
H
), the room-temperature control device is
defective.
z
Move mains power switch to “
0
”.
z
If the room-temperature control device is in order,
remove the bridging leads and attach the cable and
(non-conducting) link.
5.3.23 Replacing the room-temperature control device
z
Loosen all cables. Note order of cable terminals.
z
Attach cables, in the right order, to the new room-tempera-
ture control device.
z
Carry out the corresponding adjustment settings on the
room-temperature control device.
5.3.24 Checking the three-way valve for correct
activation
z
Set the mains switch to “
0
”.
z
Push in catch on regulating motor and remove bayonet
connector by twisting anticlockwise (fig. 85).
z
Remove regulating motor.
z
Set the mains switch to “
I
” and press the “reset” button.
z
Once the 800 Series is in operation, open one of the
hot-water taps. If the regulating motor starts up (check for
movement of red adjusting lever), the activation system of
the three-way valve is in order.
z
Shut the hot-water tap.
z
Set the mains switch to “
0
”.
z
If the activation system of the three-way valve is in order,
attach the regulating motor and lock into place by twisting
the bayonet connector.
fig. 84 Checking the controller connections at the boiler
NOTE
The system is delivered ready-fitted with a
non-conductive link between terminals
1 and 2.
fig. 85 Checking the three-way valve for correct activation
