Operation; Maintenance - BWT D1 Einbau- Und Bedienungsanleitung

EN
If a setting below 3 bar (and/or the pre-setting) is required, turn the adjust-
ment knob to the left until the spring is completely relieved. Restore the
water supply and turn the adjustment knob to the right until the desired
setpoint is reached.
If a setting above 3 bar (and/or the pre-setting) is required, restore the water
supply immediately and turn the adjustment knob to the right until the de-
sired setpoint is reached.
When making the setting, bear in mind that the back pressure set for zero
consump-tion will drop further as water is drawn off due to pressure and
friction losses. The degree of drop will depend on the amount drawn off.

5. Operation

The D1 pressure reducer is intended to be operated in perfect condition and
safety and hazard-conscious. For the operation, the EN 806 and DIN 1988-200
must be followed, as well as local standards and regulations.
The desired back-pressure is adjusted by turning the adjustment handle and
reading it on the adjustment scale at resting pressure (zero consumption).
The optional manometer on the back-pressure side allows the control of the
set rear-pressure.
Regular maintenance is also part of a proper operation of a technical device,
which shall be done by a specialist.
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6. Maintenance

According to DIN EN 806-5, inspection and maintenance must be carried out
at least once per year to rectify any malfunctions that can be caused by
contamination, corrosion, calcification and natural wear. This interval may be
shorter, depending on the conditions of use.
During this maintenance/inspection procedure, the screen must be cleaned,
the valve insert checked for fault-free condition and must be replaced if
required. Then check the back pressure is correct at zero flow and peak flow.
The function of the valve must be checked following prolonged shutdowns.
Attention!!!
During assembly work on the pressure reducer, the corresponding system
part must be depressurised and drained, depending on the medium.
Remove the valve insert
1. Shut off the water supply and relieve the valve of pressure.
2. Loosen the fixing screw on the adjustment knob (do not remove!) by
turning anticlockwise.
3. Turn the adjustment knob anticlockwise until the spring is completely
relieved. Failure to observe this instruction can cause injury!
4. Loosen the hood using a spanner and remove the assembly (Fig. b).
5. Remove the spring set, slip ring, valve insert.
6. Clean/replace the valve insert as required.
7. For assembly, proceed in the reverse sequence.
8. Set the desired setpoint as described in Chapter 4.
EN
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