Installation
19
Condens 7000 F – 6720871560 (2019/11)
Fig. 15 Hydraulic connections at the boiler (the boiler shown has a
flanged connection, right-hand version)
[1] Boiler safety connection
[2] Boiler flow
[3] Boiler return
Position and dimensions of connections Chapter 2.9, page 8.
5.8.1 Connecting the flow
With flanged connection (Tab. 7, page 7):
Insert a gasket between the flange on the boiler and the flange on the
flow pipe.
Secure the flange connection with 4 bolts, washers and nuts.
5.8.2 Connecting the return
We recommend the on-site installation a system filter (accessory) in the
return to prevent contamination of the boiler by the water.
With flanged connection (Tab. 7, page 18):
Insert a gasket between the flange on the boiler and the flange
on the return.
Secure the flange connection with 4 bolts, washers and nuts.
Connecting the expansion vessel
To safeguard individual boilers, an accessory set (expansion vessel) can
be connected to the drain connection, in accordance with BS EN 12828.
Observe the accessories installation instructions.
Remove the drain valve mounted on the return (Fig. 7)
Mount accessory set with gasket.
Install expansion vessel to maintain the system pressure in the return
on site on the intake side of the pump.
Fig. 16 Disassembly of the drain valve (the boiler shown has a flanged
connection, right-hand version)
[1] Drain valve
Connecting the drain & fill valve on site
Observe the accessories installation instructions.
Topping up of the fill water must be done via a WRAS approved
method.
Install drain valve in the return outside the boiler itself.
5.8.3 Installing the safety assembly on the flow (on site)
NOTICE:
System damage through incorrect installation!
Fit the safety valve and automatic air vent valve or safety assembly to
the safety connection on the flow.
The safety assembly (accessory) comprises an automatic air vent for
venting of the boiler (not the heating system) and a pressure gauge.
As an option, it may be converted for use with a safety valve (additional
accessory).
If these accessories are not used, a pressure relief valve, pressure gauge
and automatic air vent valve must generally be installed in the flow,
before of the first shut-off device.
Subject to operating pressure, different safety valves are required.
Observe the accessories installation instructions.
Connection of safety set, 3 bar
Seal the pressure relief valve at the threaded connection of the
heating flow using suitable sealants or supplied gaskets (Fig. 17).
Fit the discharge pipe to the respective pressure relief valve
according to local regulations.
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