Installation
6
14
Installation instructions Logamax plus GB142-24/30/45/60 • version 10/2007
Buderus • http://www.buderus.net
We reserve the right to make any changes due to technical modifications!
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 an adequately sized safety valve in the system
that meets all applicable codes and regulations.
z
Thoroughly flush all pipes and radiators. Use of a
Buderus approved boiler cleaner is recommended.
z
Refer to the installation template for the pipe connection
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
boiler.
z
Connect the expansion tank to the system.
z
Connect the pipes so that they are free from strain.
Connecting boiler with DHW tank
z
Connect the external hot-water tank according to the
Installation instructions of the hot-water tank and fittings
concerned.
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
– To protect the entire heating system we
recommend installing a dirt particle filter in
the return circuit. When retrofitting the boiler
to an existing heating system this filter is
required.
– Install shut-off valves immediately before and
after the dirt particle filter to allow the filter to
be cleaned.
NOTICE
When using oxygen-permeable pipes, e. g. for
radiant floor heating systems, you must sepa-
rate the system using heat exchangers.
Buderus recommends hydraulically isolating
snowmelt systems using heat exchangers.