Fitting The Heating Circuit Supply And Return Pipes - Buderus Logamax Plus GB142-24 Installation Instructions Manual

6.4 Fitting the heating circuit supply and
return pipes
NOTICE
– To protect the entire heating system we
require installing a WYE strainer 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.
Logamax plus GB142-24/30/45/60 - We reserve the right to make any changes due to technical modifications!
Steel pipe Equivalent length for Pipe Fittings in feet
diameter
Type of pipe fitting
in inches
90°-Elbow
(flow thru
branch)
Equivalent length in feet
¾ 2.1
1 2.6
1 ¼ 3.5
1 ½ 4.0
Table 3 Equivalent length for pipe fittings in feet
1
11
3
5
8
9
Fig. 9 Pump manifold installation
pos. 1: Compression fitting (heating system supply pipe)
2: Compression fitting (heating system return pipe)
3: Relief valve
4: DHW return 1"FPT
5: DHW supply 1"FPT
6: Low loss header
7: System return 1½ MPT
8: Drain valve
9: System supply 1½ MPT
10: Tridicator
11: Di electric union
Installation
Tee Gate valve Gas cocks
4.1 0.5 1.25
5.2 0.6 1.60
6.9 0.8 2.15
8.0 0.9 2.50
6
2
11
4
6
10
7
15