gledhill Stainless Lite Direct 90-300 litres, Design, Installation & Servicing Instructions

Page 19

C

OMMISSIONING

INSTALLATION

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 = 2.2bar.  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 fi ttings.  Allow the system to fi ll 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 overfl owing at the tundish, and the valve should 
seat satisfactorily.

Allow the cylinder to heat to normal working temperature, then thoroughly fl ush 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 fl ats etc., the hot and cold water system will need 
to be disinfected in accordance with BS6700 and the Water Regulations.

Because the Stainless Lite appliance is stainless steel,  the use of chlorine as the 
disinfection agent can cause damage unless the appliance is adequately fl ushed and 
refi lled 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.

Remove the fi lter from the combination inlet group clean and replace.  Refi ll 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. This includes 
adequately fl ushing the system to remove any 
debris that may have been introduced during 
installation/maintenance.

NOTE:  This appliance is covered by BENCHMARK 
and the log book must be completed after 
commissioning and after every maintenance/
service visit.

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