Instructions on commissioning, maintenance, and troubleshooting for auroSTOR 0020111119_02
61
8.1
Checking the temperature/pressure
relief valve and expansion relief valve
>
Open each valve manually by turning the valve cap and
check whether water is able to flow to the drain via the
tundish without obstruction. Make sure that both valves
sit correctly in their idle position.
8.2
Checking the charge pressure
of the expansion vessel
>
Shut off the water supply pipe and open the nearest hot
water draw-off point to discharge the pressure from the
secondary water system.
>
Use a pressure gauge to check the expansion vessel
pressure at the measuring point. If the pressure is below
3.0 bar, increase it using a suitable air pump.
>
Fill in the maintenance section of the commissioning
report.
8.3
Draining the cylinder
>
Close the cold water supply pipe.
>
Secure a hose to the drain valve.
>
Place the free end of the hose in a suitable discharge
position. The opening should be around 1 m beneath the
cylinder.
>
Open the highest hot water draw-off point to reduce the
pressure and vent the water pipes, thus draining them
completely.
>
Open the cylinder drain valve and leave open until no
more water escapes and the cylinder is completely
empty.
>
Once the water has drained out, close the hot water
draw-off point and the drain valve.
>
Remove the hose from the drain valve.
Inspection and maintenance 8
