Bosch WORCESTER Greenstar CDi Classic Series Technical Information page 34

Hot water supply
All Worcester Greenstar boilers are fi tted with a
fl ow regulator set to achieve a 40°C temperature rise.
This ensures comfortable bathing during the colder
winter months.
For the Greenstar CDi Classic range, a domestic hot water
fl ow regulator, set to give an optimum fl ow rate of between
9 and 15l/min ±15% (dependent on model) is fi tted to the
cold supply of the hot water heat exchanger.
The Greenstar CDi Compact fl ow regulators are sized
between 10l and 13l.
A domestic hot water fl ow regulator, set to give an
optimum fl ow rate of between 8 and 11l/min ±15%
(dependent on model) is fi tted to the cold supply of the
hot water heat exchanger in the Greenstar Si Compact
and i Junior combis.
As with all mains-fed systems, the fl ow rate of water
obtainable from individual taps will vary in relation to the
number of taps operating simultaneously, and will depend
upon the cold mains supply available to the property.
Therefore, in order to avoid excessive starvation of fl ow
to individual taps, fl ow balancing may be required by the
use of proprietary constant volume fl ow regulators or
Ball-o-Fix valves.
Hot water systems
Taps and valves
Hot and cold taps and mixing valves used with the
Greenstar combi appliances must be suitable for
operating at a mains pressure and temperatures of
65°C (150°F).
34
Use in hard water areas
As the maximum temperature of the domestic hot water
heat exchanger is limited by the electronic control circuit,
there is normally no need for water treatment to prevent
scale accumulation.
In areas where exceptional water conditions prevail,
consideration may need to be given to the fi tting of a device
capable of preventing scale. In such circumstances, the
advice of the local water authority should be sought.
Guarantee
Worcester Greenstar combi appliances are offered with
a full 2 year guarantee* on parts and labour, a 10 year
guarantee* on the primary heat exchanger and a 5 year
guarantee* on the plate heat exchanger. Ongoing service
and maintenance contracts can be arranged through the
Worcester Customer Service Department.
Please contact our guarantee registration advisors on
0844 892 2552 or visit www.worcester-bosch.co.uk/
guarantee
*Subject to conditions.