Pre-Installation
Worcester 2000 – 6 721 814 551 (2019/09)
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Water mains pressure:
• Minimum mains water pressure, for maximum performance refer to
section 13.1 "Technical data".
• Maximum mains fed water static pressure 10 bar.
If necessary fit a pressure reducing valve.
NOTICE:
Non return, back flow prevention appliances (including those
associated with water meters) fitted to the mains water supply can
cause a pressure build up which could damage the appliance 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 HW 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
appliance or other household appliances, we would recommend that
a 3bar 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.
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
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.
• Provide fresh air.
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.
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, 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.
NOTICE:
Damage to system:
The heating system pipe work can be damaged by frost if installed in an
internal unheated area, such as a loft, basement or garage.
The appliance internal frost protection only monitors the system water
temperature within the appliance to provide protection for the
appliance.
▶ No system frost protection available.
▶ The system pipe work in the internal unheated area should be
insulated.
▶ If the appliance is to be shut down for an extended period, drain the
central heating system.
The appliance must be installed where:
▶ The area is well lit, allowing to clearly see the appliance to carry out
any work or checks.
▶ An engineer can gain clear and safe access to work on the product or
component, including making adequate provision for visual
inspection of flues in voids.
▶ The homeowner can gain clear and safe access to the controls, check,
top up or reset the appliance.
▶ Roof space installations must fully conform to BS 5410 part 1: roof
space installations.
▶ Products in roof spaces must have permanent fixed lighting, a
permanent fixed retractable ladder and a fixed floor area sufficient to
allow access for normal use and servicing around the product and
between and the access hatch.
We would also recommend that a remote pressure gauge and filling
loop are sited where the customer can gain easy access for checking
and topping up.
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