Buderus 600 - 11S Installation And Servicing Instructions page 23

Initial start-up
Fill the system to a pressure of 1.0 to 1.2 bar (fig. 28,
item 1). Max. water pressure is 1.5 bar.
Shut both stop valves and disconnect the filling loop.
In the case of the 600 - 24C:
Purge the hot-water circuit of air
Bleed the hot-water heat exchanger via the vent screw on
the heating-circuit side (fig. 29, item 1).
Open the maintenance valve for the cold-water inlet.
Leave the hot water taps open until water begins to flow
freely.
To drain the system take the following steps:
Close the DHW cold and the CH return valve.
Connect temporary hose (fig. 30).
Open the CH return stop valve to drain the system.
2.1.2 Checking for leaks
Disconnect the system from the power supply.
Check all sections of gas pipework and connections for
signs of leaks before starting up system for the first time.
If a leak is detected during tightness testing, use an
approved leak detector to check all connections for
possible escapes.
The product must be certified as a gas leak-testing agent.
DO NOT allow the product to come into contact with
electrical wiring.
Subject to modifications resulting from technical improvements!
Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004
3
4
1 60 120 2
°C bar
1
20 0
I 11
KW
0
1
10 1
10
1
Fig. 28 Pressure display
1
Fig. 29 Purge the hot-water heat exchanger of air (applies
to type
600 - 24C only)
Stop
valve
Fig. 30 Draining the system
Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk
0 1
1 2
10
Stop
valve
temporary
hose
Drain
2
23