Initial Start-Up; Preparing The Boiler For Operation - Buderus 800-24 Installation And Servicing Instructions

2

Initial start-up

2 Initial start-up
2.1

Preparing the boiler for operation

2.1.1 Filling the heating system
WARNING
The wall-mounted condensing gas boiler must
not be activated at this stage.
When using oxygen-permeable pipes (e.g. for floor heating),
heat exchangers must be used to separate the system.
Move the mechanical switch on the three-way valve to
centre position (fig. 24) (applicable for 800-24T25 and
800-29T25 only) and systems with an external storage-
type water heater.
If necessary open the CH flow and CH return maintenance
valves.
Connect temporary hose of the filling loop (for pipe
locations see page 6 and 7).
Open both stop valves.
Fill the system to a pressure of 1.0 to 1.2 bar (fig. 26,
item 1). Max. water pressure is 2.0 bar.
Shut both stop valves and disconnect the filling loop.
To drain the system take the following steps:
Close the CH flow and the CH return service valve.
Place hose on the draining tule.
Turn to drain the system.
Subject to modifications resulting from technical improvements !
22 Installation and servicing instructions condensing gas boiler 800 - 24/29/43/60 and 800 - 24T25/29T25 H/V • edition 02/2006
fig. 24 Mechanical switch on the three-way valve
stop
valve
double
check
valve
DHW
cold
fig. 25 Connecting temporary hose
I 11
KW
0 0 1
1 2
1 10
1
10
1 10
fig. 26 Pressure display
stop
valve
temporary
hose
CH
return
Buderus • http://buderus-domestic.co.uk