Fitting The Heating Circuit Supply And Return Pipes - Buderus logamax plus gb142-24 Installation Manual

6 Installation
6.4 Fitting the heating circuit supply and
return pipes
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.
Fit a filling and drain cock in the heating system supply
pipe if required.
Also fit an adequately sized safety valve in the system
that meets all applicable codes and regulations.
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.
Thoroughly flush all pipes and radiators. Use of a
Buderus approved boiler cleaner is recommended.
Refer to the installation template for the pipe connection
dimensions.
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.
Connect the expansion tank to the system.
Connect the pipes so that they are free from strain.
Connecting boiler with DHW tank
Connect the external hot-water tank according to the
Installation instructions of the hot-water tank and fittings
concerned.
Buderus • http://www.buderus.net
14
Steel pipe
diameter
in inches
¾
1
1 ¼
1 ½
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
We reserve the right to make any changes due to technical modifications!
Installation instructions Logamax plus GB142-24/30/45/60 • version 10/2007
Equivalent length for Pipe Fittings in feet
Type of pipe fitting
90°-Elbow Tee Gate valve Gas cocks
(flow thru
branch)
Equivalent length in feet
2.1 4.1
2.6 5.2
3.5 6.9
4.0 8.0
1
5
3
0.5 1.25
0.6 1.60
0.8 2.15
0.9 2.50
2
4