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6 720 645 817 (2010/09)
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7.7 Shut-off set combined with check
valve
Fig. 35 Shut-off valve
VK Flow with flange, welded to the boiler
1 Nut
2 Gasket
3 Shut-off valve
4 Check valve
5 Flow piece in cascade pipework
When using shut-off valves, install the check valve in the
flow direction downstream of the shut-off valve.
7.8 Boiler flue connection
Special boiler flue connections made from translucent
PP are available for the Suprapur KBR ... to provide a
connection between the boiler and flue system.
The boiler flue connections are available in a straight
version (KAS) and in an 87° version (boiler flue
connection bend KAB), in size DN 160 for boilers with
120 kW and 160 kW output as well as DN 200 for boilers
with 200 kW to 280 kW output. Boiler flue connections
are already part of the factory-prepared cascade packs.
The boiler flue connections provide a test port and a
condensate connector for draining the condensate
created in the flue system. As standard, a piece of hose
with threaded fittings is supplied for the condensate
drain. This can be easily connected with the boiler
siphon (threaded fittings).
If no boiler flue connections are used, ensure the
draining of condensate from the flue system on site.
Adaptors or reducers are available for alternative
connection diameters.
7.9 Ventilation air connection bend
A connection bend for balanced flue operation is
available in translucent PP for the Suprapur KBR ...
The connection bend DN 110 has an angle of 90° and a
test port.
Adaptors are available for larger dimensions.
7.10 Cleaning tool
A special cleaning tool is available for the Suprapur
KBR ...
This cleaning tool can be used to back up other cleaning
methods when there are resistant deposits inside the
boiler.
Generally, the system is cleaned by flushing with tap
water and blowing compressed air through the heat
exchanger and burner. In the case of severe
contamination, cleaning agents approved by Junkers can
be used. Check with Junkers for details.
7.11 Services
Junkers offers setup optimisation for the gas burner,
boiler and the control unit parameters as part of the
commissioning service. Commissioning requires a
natural gas connection, and adequate heat transfer must
be ensured.
In addition, there is the option of supplying a mobile
water treatment plant to reduce the hardness of the fill
water for the system in accordance with Junkers
requirements.
If required, please contact out customer service
(Æ back page).
6 720 642 877-17.1il
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