Vaillant uniSTOR VIH RW GB BES Series, Installation And Maintenance Instructions Manual

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7 Handing the product over to the end user
14
Installation and maintenance instructions uniSTOR HP 0020221300_04
Condition : Without a multi-functional module or control
▶
Set the domestic hot water temperature as desired.
Condition : With multi-functional module or control
▶
Set the immersion heater thermostat (1) to its maximum.
The temperature of the immersion heater is regulated via
the temperature sensor that is installed on the carrier in the
electronics box.
6.2 Cold water inlet pressure
The product's efficiency depends on the cold water inlet
pressure.
To achieve optimum efficiency, we recommend a pressure of
at least 2 bar.
6.3 Filling and purging the product
Note
It is not permitted to use valves or expansion relief
valves for the purging.
1. Check whether the drain valve is closed.
2. Open the domestic hot water draw-off valves.
3. Open the water supply valve.
4. Open the manual air separator at the top of the cylinder.
5. Let the water flow in order to remove any air bubbles.
6. Close the manual air separator as soon as all of the air
has escaped.
7. Close the domestic hot water draw-off valves.
8. Check whether there are any leaks. Check the immer-
sion heater in particular.
9. Open the highest hot water supply valve, and then the
lowest hot water supply valve, and let the water flow.
–
Water running time:
≥
5 min
10. Close all of the draw-off valves.
6.4 Filling and purging the primary circuit
Note
The primary circuit can be filled using a filling
device or a separate filling cock, which is installed
at a location that is easily accessible.
The separate filling cock must be removed after
filling.
If a filling device is used, close the filling valve and
remove the filling device.
Legal requirements mean that you must not use a
separate filling tap. Use a pump.
1. Move the lever to MAN OPEN and hold it in this posi-
tion.
2. Flush out the primary circuit and then fill and purge it.
Consult the installation instructions for the heat gener-
ator.
3. Move the lever to AUTO.
4. Remove the cover for the electrics.
5. Set the product's thermostat and the immersion heater's
thermostat.
–
Setting the thermostats: 60
℃
6. Start up the heat generator.
7. Drain the heating circuit as soon as the operating
temperature has been reached in order to remove any
residue from the heating installation.
8. Fill and purge the primary circuit. Consult the installa-
tion instructions for the heat generator.
7 Handing the product over to the end
user
▶
Once the installation is complete, show the user the loca-
tion and function of the safety devices.
▶
Inform the end user how to handle the product.
▶
In particular, draw attention to the safety warnings which
the end user must follow.
▶
Inform the end user of the necessity to have the product
maintained according to the specified intervals.
8 Troubleshooting
8.1 Detecting and eliminating faults
▶
If problems occur whilst operating the product, check
certain points with the aid of the table in the appendix.
Detecting and eliminating faults (
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Page 16)
8.2 Procuring spare parts
The original components of the product were also certified
by the manufacturer as part of the declaration of conformity.
If you use other, non-certified or unauthorised parts during
maintenance or repair work, this may void the conformity of
the product and it will therefore no longer comply with the
applicable standards.
We strongly recommend that you use original spare parts
from the manufacturer as this guarantees fault-free and safe
operation of the product. To receive information about the
available original spare parts, contact the contact address
provided on the back page of these instructions.
▶
If you require spare parts for maintenance or repair
work, use only the spare parts that are permitted for the
product.
9 Inspection and maintenance
9.1 Observing inspection and maintenance
intervals
Adhere to the minimum inspection and maintenance inter-
vals. The inspection may require maintenance to be carried
out earlier, depending on the results.
Inspection and maintenance work
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Overview (
→
Page 16)
The immersion heater can be removed in order to inspect
the inside of the cylinder.