Commissioning; Requirements - Buderus 600 - 11R Installation And Servicing Instructions

2

Commissioning

2 Commissioning
When a boiler starts up there are a couple of things that
happen. Below is a short process description:
When there is a heat demand:
The fan starts up and the glow ignitor turns on.
When there is a DHW request then the three-way-valve
switches from CH operation to DHW operation.
Once all the requirements are met (glow ignitor is hot
enough, fan is operating at the correct speed and the
pump is on) then the gas valve will open.
A flame will establish and the glow ignitor extinguishes.
The boiler will start at partial load and will go to the
requested load after a few seconds.
If the boiler detects a no-flow situation, the boiler will
shut down for a short while and then try to start up again.
If no flame develops then the gas valve closes and the
fan continues to run to post purge. The boiler will try to
start up three times. If there still is no flame developing
after three times, then the boiler will lock-out.
When the heat demand stops:
The gas valve closes.
The fan will keep going for a short while to post purge the
appliance.
If there has been a DHW request then the three-way-
valve will switch back to the central heating setting.
Follow the steps described in this chapter to properly
commission the boiler and fill out the commissioning log
book.
NOTE
If a fault occurs, then refer to the servicing
section in this manual or contact Buderus.
2.1

Requirements

Thoroughly flush out the whole of the system with
cold water, without the pump in position.
For sealed system only:
Fill and vent the system until the pressure gauge
registers 1.5 bar. Test for leaks.
Check the operation of the safety valve by manually
raising the water pressure until the valve lifts. This
should occur within ±
sure.
Release water from the system until the initial system
design pressure is reached.
Buderus • http://www.buderus-domestic.co.uk
30 Installation and servicing instructions for wall-mounted condensing gas boiler Buderus 600 - 11R/19R/24R • 02/2006
0.3 bar of the preset lift pres-
Subject to modifications resulting from technical improvements!