Water Circulation System; Pipe Connections - Buderus 800 User Manual

1 Installation
 Remove the screw (fig. 5, item 2).
 Open the locks (fig. 5, item 3) with the radiator key
(fig. 5, item 4).
 Release the clasps (fig. 5, item 5).
 Remove the boiler casing forwards (fig. 5, item 6).
Do not carry the casing by the clasps !
Combination unit type 800 - 24T25V / 29T25V:
Vertical boilers:
 Pull forward the casing of the hot water reservoir and
lift it clear from the top holders. This is only possible
with the upper casing removed.
 Attach the gas boiler to the wall bracket (fig. 6).
1.6

Water circulation system

The central heating system should be in accordance
with BS.6798 and, in addition, for smallbore and
microbore systems, BS.5449.
1.7

Pipe connections

1.7.1 Heating circuit connection
On type 800 – 60 an automatic air-release valve must
be fitted in the return line.
A servicing valve has to be installed in the flow and
return lines to allow the gas boiler to be serviced and
repaired.
Make sure that the expansion vessel, pressure relief
valve and draining valve are installed between the
service valve and the boiler.
In order to ensure an optimum and efficient operation of
the heating system, care must be taken that the heating
boiler always has the required minimum amount of
circulation water.
In single-circuit systems the required minimum amount
of circulation water can be provided e.g. by means of an
bypass valve.
A bypass valve is not needed when a hydraulic shunt is
installed.
12 Wall-mounted condensing gas boiler Buderus 800 - Subject to modifications resulting from technical improvements!
fig. 6 Installation