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We reserve the right to make any changes due to technical modifications!
Installation and Servicing Instructions Logamax plus GB142-24/30/45/60 • Version 12/2004
Buderus Hydronic Systems • http://www.buderus.net
Installation6
6.4 Fitting the heating circuit supply and
return pipes
z Fit a filling and drain cock in the heating system
supply pipe if required.
z Also fit a safety valve in the system.
z Thoroughly flush all pipes and radiators.
z Refer to the installation template for the pipe connec-
tion dimensions.
z Fit the compression fittings (fig. 9, pos. 1 and 2) first
to the Hydronic set (see fig. 10, 11 and 12) and then
to the appliance.
z Connect the expansion tank to the system.
z Connect the pipes so that they are free from strain.
Steel pipe
diameter
in inches
Equivalent length for Pipe Fittings in feet
Type of pipe fitting
90°-Elbow Tee
(flow thru
branch)
Gate valve Gas cocks
Equivalent length in feet
¾ 2.1 4.1 0.5 1.25
1 2.6 5.2 0.6 1.60
1 ¼ 3.5 6.9 0.8 2.15
1 ½ 4.0 8.0 0.9 2.50
Table 3 Equivalent length for pipe fittings in feet
Fig. 9 Pump manifold installation
pos. 1: Compression fitting (heating system supply pipe)
pos. 2: Compression fitting (heating system return pipe)
pos. 3: DHW supply
pos. 4: DHW return
pos. 5: Relief valve
2
1
3
4
5
NOTICE
Piping and components connected to the
water appliance for the space heating
application are suitable for use with potable
water.
A water appliance which will be used to
supply potable water shall not be
connected to any heating system or
component(s) previously used with a
nonpotable water heating appliance.
NOTICE
To protect the entire heating system we
recommend installing a dirt particle filter in
the return circuit. When connecting the
appliance to an existing heating system this
filter must definitely be installed.
Install shut-off valves immediately before
and after the dirt particle filter to enable the
filter to be cleaned.
NOTICE
When using oxygen-permeable pipes, e. g. for
floor heating systems, you must separate the
system using heat exchangers.
14


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