Water Supply; Appliance Location And Clearances; Appliance Location - Worcester Greenstar 2000 Installation And Maintenance Instructions Manual

Pre-Installation
4.2.4

Water supply

Use in hard water areas:
Normally there is no need for water treatment to prevent scale formation
as the maximum temperature of the DHW heat exchanger is limited by
the electronic control.
In areas where temporary water hardness exceeds 200ppm,
consideration may need to be given to the fitting of a scale prevention
device. In such circumstances, the advice of the local water authority
should be sought.
Keyless filling link accessory
Minimum static pressure.
▶ A minimum static cold water mains pressure of 1.75bar is
recommended for correct operation of the Keyless filling link.
Water mains pressure:
• Minimum mains water pressure, for maximum performance refer to
section 13.1 "Technical data".
• Maximum mains fed water static pressure is 10 bar.
If necessary fit a pressure reducing valve.
NOTICE
Non-return, back flow prevention devices (including those
associated with water meters) fitted to the mains water supply can
cause a pressure build up which could damage the boiler and other
household appliances.
NOTICE
Non-return valves in the cold water feed system.
If a non-return valve is fitted on the mains inlet, then pressure can
increase significantly over normal standing pressure when the appliance
carries out a DHW preheat or due to fast acting valves closing on other
appliances/outlets.
▶ To ensure water pressure stays at a level that will not damage the
boiler or other household appliances, we would recommend on
installations where standing pressure exceeds 3bar, that a 3 bar
pressure reducing valve and mini expansion vessel are fitted.
• Where the mains water supply has a non-return, back flow prevention
valve fitted, a mini expansion vessel [3] should be connected to the
mains water inlet pipe [1] between the non-return valve [2] and the
appliance[4] as shown below.
3
2
1
Fig. 9 Mini expansion vessel location
[1] Mains water inlet pipe
[2] Non-return valve
[3] Mini expansion vessel - part no. 7 716 192 105
[4] Appliance
16
4
0010015563-001
4.3

Appliance location and clearances

4.3.1

Appliance location

• Follow local regulations for the location within the property that the
appliance is to be installed.
• This appliance is only suitable for installing internally within a
property at a suitable location onto a flat, fixed rigid surface capable
of supporting the appliance weight.
• The appliance is not suitable for external installation.
• Protect installation area against dust and moisture.
No surface protection is required against heat transfer from the
appliance.
DANGER
Danger from explosive and flammable materials:
Storage of explosive and flammable materials.
▶ Do not store flammable materials (paper, curtains, clothing, primer,
paint, ...) in proximity to the appliance.
WARNING
Risk of injury due to damage to the appliance
▶ The appliance must not be sited in such a position that some or all of
the underside of the appliance is closer than 760mm above a
permanently fixed hob.
▶ Reasonable care should be taken to ensure the appliance is not
installed directly above where other heat-producing kitchen
appliances such as portable hot plates, toasters and kettles are likely
to be sited.
NOTICE
Damage to appliance:
Contaminated combustion air.
▶ Do not use any cleaners containing chlorine or hydrogen halide (i.e.
spray cans, primers, cleaners, paint and glue).
▶ Do not store or use these substances in the appliance or room.
▶ Avoid the build-up of dust.
NOTICE
Damage to appliance:
Extreme temperatures may cause damage to the heating system.
▶ Ensure the appliance location's ambient temperature is above 0 °C
and below 50°C.
Greenstar 2000 – 6 721 820 552 (2021/02)