Commissioning - Viessmann Vitocell 200 Cylinder Design, Installation, User & Servicing Instructions

iNSTALLATiON

Commissioning

Connections can come loose in transit, and all should be checked before
installation.
Ensure that the immersion heater setting is 60°C and that the wiring is in accordance
with the diagram.
Check the pressure on the air side of the expansion vessel = 3 bar. This must be done
when the volume in the cylinder is cold.
Check that the drain cock is closed, and open all the cold and hot water taps and other
terminal fittings. Allow the system to fill with water, and to run until there is no air left
in the system. Close the taps and inspect the system closely for leaks.
Manually open the Relief Valves one by one and check that water is discharged and
run freely through the tundish and out at the discharge point. The pipework should
accept full bore discharge without overflowing at the tundish, and the valve should
seat satisfactorily.
Allow the cylinder to heat to normal working temperature, then thoroughly flush the
domestic hot and cold water pipework through each tap.
NOTE: If this appliance is to be installed in other than a single domestic dwelling ie.
in an apartment block or student flats etc., the hot and cold water system will need
to be disinfected in accordance with BS6700 and the Water Regulations.
Because the Viessmann appliance is stainless steel, the use of chlorine as the
disinfection agent can cause damage unless the appliance is adequately flushed
and refilled with the mains water immediately on completion of the disinfection
procedure. Damage caused through a failure to do this adequately will not be covered
by the warranty.
For the above reasons we recommend the use of a non chlorine dased disinfectant
such as Fernox LP Sterox as manufactured by Cookson Electronics when carrying out
disinfection of systems incorporating these appliances.
iMPORTANT - DRAiN DOWN PROCEDURE
1 Switch off both the boiler and the immersion heater
2 Open the nearest hot tap and run all hot water until cold
3 Close the incoming cold main at the stop tap
4 Hold open the pressure and temperature relief valve until water stops
discharging into the tundish
5 Open all the taps in the property
6 Open the drain cock and immediately hold open the pressure and
temperature relief valve again until the cylinder is empty
Remove the filter from the combination inlet group clean and replace. Refill the system
and open all hot taps until there is no air in the pipe work. ENSURE CYLiNDER iS
DRAiNED PRiOR TO CHECKiNG OR REMOViNG FiLTER FROM THE COMBiNATiON
iNLET GROUP.
Allow the cylinder to heat to normal working
temperature with whatever heat source is to
be used, and check again for leaks. The Pressure
Relief Valve should not operate during the
heating cycle.
The boiler/heating systems should be filled
and commissioned in accordance with good
practice following the guidance in BS 5449/the
boiler manufacturers instructions.
NOTE: This appliance is covered by BENCHMARK
and the log book must be completed after
commissioning and after every maintenance/
service visit.
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