Replacing The Mains Connection Cable; Completing Repair Work; 10 Inspection And Maintenance; Preparing The Maintenance And Repair Work - Vaillant aroSTOR VWL B 200/5 UK Installation And Maintenance Instructions Manual

Note
The safety cut-out settings must not be
changed.
9.4

Replacing the mains connection cable

2
3
4
5
1
6
1. If the product's mains connection cable is damaged, it
must be replaced.
Note
The electrical installation must only be car-
ried out by a competent person.
2. Remove the covering hood.
3. Remove the cover from the PCB.
4. Carry out the wiring. (→ Page 16)
5. Guide the mains connection cable through the cable
duct on the rear of the electronics box.
6. Connect the mains connection cable to the product's
power supply connection.
9.5

Completing repair work

1. Install the covering hood. (→ Page 10)
2. Establish the power supply.
3. Open all of the stopcocks.
4. Switch on the product. (→ Page 18)
5. Check that the product and the hydraulic connections
work correctly and check for tightness.

10 Inspection and maintenance

10.1

Preparing the maintenance and repair work

1. Decommission the product.
2. Disconnect the product from the power grid.
3. Wait until the fan has come to a complete stop.
4. Close the stopcocks in the hydraulic circuit.
5. Close the stopcock upstream of the safety group on the
cold water inlet.
6. Remove the covering hood.
7. Drain the product if you want to replace water-bearing
components of the product.
8. Make sure that water does not drip on live components
(e.g. the electronics box).
9. Use only new seals.
22
10.2 Observing inspection and maintenance
intervals
▶
Adhere to the minimum inspection and maintenance in-
tervals.
Annual inspection and maintenance work – Overview
10.3

Draining the product

1. Decommission the product.
2. Disconnect the product from the power mains.
3. Close the stop cock upstream of the safety group on
the cold water inlet.
4. Ensure that the waste water outlet is connected to the
safety group.
5. Open the safety group valve and check that water is
flowing into the outflow.
6. Open the highest hot water draw-off point in the house
to drain the water pipes completely.
7. Once the water has completely drained out, close the
safety group valve and the hot water draw-off point
again.
10.4

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 result in the product no
longer meeting the applicable standards, thereby voiding the
conformity of the product.
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.
10.5 Checking the safety group's expansion
relief valve and the cylinder's expansion
relief valve
1. Open all expansion relief valves by turning the plug.
2. Check whether the water is flowing into the tundish.
3. Check that the expansion relief valves are in the cor-
rect position and then check the pressure.
4. Check and, if required, clean the pressure reducer.
10.6 Checking the pre-charge pressure of the
expansion vessel
1. Drain the product. (→ Page 22)
2. Measure the pre-charge pressure of the expansion
vessel at the vessel valve.
Condition: Pressure <0.3 MPa (3 bar)
▶
Top up the expansion vessel in accordance with the
static height of the heating installation, ideally with nitro-
gen, otherwise with air.
3. If water escapes from the valve of the expansion ves-
sel, you must replace the expansion vessel.
4. Fill the domestic hot water circuit. (→ Page 18)
Installation and maintenance instructions 0020285063_05