Table of Contents
Advertisement
22 | Boiler block assembly
B Tighten the nuts on the anchor rod threads by hand.
B Tighten the nuts 1 to 1 ½ turns on the anchor rods.
B Release and remove the compression tool.
5.1.9
Fitting distribution tube and supply/return
header
The distribution tube, the supply/return header and the
sensor well are already assembled if the boiler block is
supplied as a ready assembled unit.
Before installation of the supply/return
header, first push the distribution tube from
the boiler front into the boiler (do not forget
the boiler hub flat gasket) if insufficient
space is available behind the boiler.
B Secure the distribution tube to the supply/return
header with M8 x 16 screws and flat gaskets.
1
2
Fig. 18
Fitting feed pipe on supply/return header
1
Distribution tube
2
M8 x 16 (brass)
3
Flat gasket
4
Supply/return header
B Remove the nuts from the threaded studs.
B Push the flat gasket over the distribution tube.
B Push the feed pipe with the supply/return header and
flat gasket into the upper boiler hub at the boiler
back.
6 720 648 162 (2011/08)
3
4
6 720 648 032-18.1T
Fig. 19
Fitting feed pipe and supply/return header
1
Flat gasket
B Position the supply/return header on the threaded
studs and tighten four nuty by hand.
B Evenly tighten the supply/return header nuts
diagonally using a torque wrench (torque: maximum
44 lbs-ft (60 Nm)).
Fig. 20
Fitting supply/return header
1
Torque wrench
2
Suply/return header
Seal connections which are not required with the plugs
supplied. When the boiler is supplied as a ready
assembled block, these plugs have already been fitted.
B Insert plugs with flat gaskets into the connections
that are not required.
1
6 720 648 032-19.1T
1
2
6 720 648 032-20.1T
Advertisement
Table of Contents
