Hard Water Area; Bypass; System Control; Treatment Of Water Circulating Systems - Potterton Assure System Series Installation And Service Manual

5 Before installation
24
Important
Any wiring to the boiler, from either the mains or an external
control, MUST be cable of the following specification:- 0.75mm
3183/4/5Y (depending on installation) multi strand flexible cable
conforming to BS 50525-2-11.
Cable of the above specification is sufficiently flexible to
withstand normal regular opening and closing of the facia/
control box as expected during routine servicing and other
maintenance work.
Use ONLY cable glands supplied with the boiler, or provided as
spares by the manufacturer.
Under no circumstances must solid core cable be used as it is
not intended for applications where movement may occur. The
use of solid core cable could result in situations potentially
hazardous to health.
These points must be considered when initially wiring the boiler
to the installation, and if replacing any wiring during the service
life of the boiler.
5.2.3

Hard water area

Important
Only water that has NOT been artificially softened must be used
when filling or re-pressurising the primary system. If the mains
cold water to the property is fitted with an artificial softening/
treatment device the source utilised to fill or re-pressurise the
system must be upstream of such a device.
5.2.4

Bypass

The boiler is fitted with an automatic integral bypass.
5.2.5

System control

Further external controls (e.g. room thermostat sensors) MUST be fitted to
optimise the economical operation of the boiler in accordance with Part L
of the Building Regulations. A range of optional controls is available. Full
details are contained in the relevant Sales Literature.
5.2.6

Treatment of water circulating systems

All recirculatory water systems will be subject to corrosion unless an
appropriate water treatment is applied. This means that the efficiency of
the system will deteriorate as corrosion sludge accumulates within the
system, risking damage to pump and valves, boiler noise and circulation
problems.
When fitting new systems flux will be evident within the system, which can
lead to damage of system components.
BS 7593 gives extensive recommendations on system cleansing and
water treatment.
All systems must be thoroughly drained and flushed out using appropriate
proprietary flushing agent.
A suitable inhibitor must then be added to the system.
All system additives (flushing agents, cleansers, inhibitors etc.) must
comply with the requirements of BS 7593. Full instructions are supplied
with the products and for further information contact the additive
manufacturer directly or consult their website.
Important
Failure to flush and add inhibitor to the system will invalidate the
appliance warranty.