Initial Start-Up; Preparing The Boiler For Operation - Buderus 500-24C User Manual

10

Initial start-up

10.1

Preparing the boiler for operation

Please also note the user manual supplied with the
external time controls and thermostat.
10.1.1 Check water pressure
Check the pressure gauge (fig. 3, item 3) located at the
bottom of the boiler for the current system pressure.
Optimum system pressure is 1.5 bar.
10.1.2 Fill the heating system
WARNING!
The wall-mounted condensing gas combi boiler
must not be activated at this stage.
The system should be filled with untreated mains water.
Turn off the boiler by pressing the mains switch to "0".
If necessary open the CH flow and CH return servicing
valves (fig. 3, item 1 and 2).
Connect filling loop (fig. 5).
Open both stop valves (fig. 5).
Fill the system to a pressure of approx. 1.5 bar (fig. 3,
item 3).
Close both stop valves.
Vent the air from all radiators starting with the lowest radia-
tor and working up to the highest point.
Check the pressure after venting. If the pressure has
dropped under 1.0 bar then top up the system as described
previously.
Disconnect the filling loop and cap off.
NOTE
If there are frequent water losses, have the
system examined and repaired by a CORGI
registered installer. Have the inhibitor concen-
tration checked every year.
Subject to modifications resulting from technical improvements!
Users manual for Buderus 500-24C and 500-28C • 07/2007
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1
DHW
outlet
CH
flow
fig. 3 Servicing shut off valves
1
fig. 4 DBA – Mains switch
stop
valve
double
check
valve
MCW
inlet
fig. 5 Connecting filling loop
Users manual
MCW
inlet
CH
Gas
return
stop
valve
filling loop
CH
return
Buderus • http://www.buderus.co.uk
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