Initial start-up
2
Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 02/2006
23
Subject to modifications resulting from technical improvements!
Buderus • http://www.buderus-domestic.co.uk
z
Fill the system to a pressure of 1.0 to 1.2 bar (fig. 28,
item 1). Max. water pressure is 1.5 bar.
z
Shut both stop valves and disconnect the filling loop.
In the case of the 600 - 24C:
Purge the hot-water circuit of air
z
Bleed the hot-water heat exchanger via the vent screw on
the heating-circuit side (fig. 29, item 1).
z
Open the maintenance valve for the cold-water inlet.
z
Leave the hot water taps open until water begins to flow
freely.
To drain the system take the following steps:
z
Close the DHW cold and the CH return valve.
z
Connect temporary hose (fig. 30).
z
Open the CH return stop valve to drain the system.
2.1.2
Checking for leaks
z
Disconnect the system from the power supply.
z
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.
Fig. 28 Pressure display
0
4
2
bar
1
3
20
120
60
°C
1 2
10
0 1
11
KW
10
1
10
1
1
I
0
1
Fig. 29 Purge the hot-water heat exchanger of air (applies
to type 600 - 24C only)
1
Fig. 30 Draining the system
Drain
temporary
hose
Stop
valve
Stop
valve
DHW Cold
(combi only)
CH Flo
w
CH Retur
n
