Start-Up 6; Regulations; Maintenance 7; Cleaning The Internal Tank - Vaillant uniSTOR Operating And Installation Manual

7
6
5
4
Fig. 5.12 Installing the safety groups
Key to Fig. 5.12
1 Venting knob
2 Blow-off line
3 Stop valve
4 Stop valve with hand wheel
5 Test plug
6 Pressure gauge connection point
7 Backflow preventer
6 Start-up
Once installation is complete, the cylinder must be filled
on the heating and DHW sides. Proceed as follows to do
this:
• VIH S only: Fill the solar circuit (see System Manual).
• Fill the heating side via the boiler filling and draining
connection.
• Check the cylinder and system for leaks.
• Fill the DHW system via the cold water inlet and bleed
the system at a hot water draw-off point.
• Check the function and correct setting of all control
and monitoring devices.
• Program the timer or timer program, if present, on
the controller (define the start of the enable time for
cylinder charging).
• Put the boiler into operation.
• VIH S only: Put the solar system into operation.
6.1

Regulations

Observe all applicable national regulations and guide-
lines.
Before the installation, check if there are further local
regulations.
Operating and Installation Manual for uniSTOR, auroSTOR, geoSTOR Cylinders 0020080043_00
7 Maintenance
1
7.1
2
Make sure the cleaning devices and cleaning agents are
in a hygienic condition, since the cleaning work is car-
ried out in the inner tank of the cylinder within the
drinking water area.
Proceed as follows when cleaning the inner tank:
• Drain the cylinder.
• Remove the flange cover on the cleaning eye.
• Clean the cylinder with a jet of water. If necessary,
loosen any deposits with a suitable tool e.g. a wood or
plastic scraper and flush them out.
h Note!
Ensure that the enamelling of the heating coil
3
and the inner tank is not damaged during the
cleaning work.
• Replace the flange cover with its associated gaskets
on the cleaning eye of the cylinder.
• Tighten the screws.
h Note!
You must replace any old or damaged seals.
• Fill the cylinder and check for leaks.
H Danger!
Risk of being scalded by hot water!
The blow-off line on the expansion relief valve
fitted to the DHW cylinder must remain open at
all times.
Check the function of the expansion relief valve
during servicing by venting it.
If this is not done, the possibility of the cylin-
der bursting cannot be ruled out!
7.2
The cylinder is fitted with a magnesium sacrificial anode
which has an average service life of approx. 5 years.
To service the anode, the plastic cover must be re-
moved and the anode released with a 27 mm AF box
spanner or socket.
Visual inspection
• Remove the magnesium sacrificial anode (1) and check
it for erosion.

Cleaning the internal tank

Servicing the magnesium sacrificial anode

Installation 5

Start-up 6

Maintenance 7

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