System Details - Potterton Performa System 12 HE Installation & Service Instructions Manual

14
6.0

SYSTEM DETAILS

6.1 Central Heating Circuit
1. The appliance is suitable for fully pumped SEALED
SYSTEMS ONLY.
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 upgrading existing systems that exhibit
evidence of sludging, it is advisable to clean the system
prior to treatment in order to remove any sludge and
reduce the likelihood of these deposits damaging new
components.
• When fitting new systems flux will be evident within
the system, which can lead to damage of system
components.
• All systems must be thoroughly drained and flushed
out. The recommended flushing and cleansing agents
are Betz-Dearborn Sentinel X300 or X400 and Fernox
Superfloc Universal Cleanser which should be used
following the flushing agent manufacturer's instructions.
• System additives - corrosion inhibitors and flushing
agents/descalers should be suitable for aluminium and
comply to BS7593 requirements. The only system
additives recommended are Betz-Dearborn Sentinel
X100 and Fernox-Copal which should be used following
the inhibitor manufacturer's instructions.
Failure to flush and add inhibitor to the system
will invalidate the appliance warranty.
• It is important to check the inhibitor concentration
after installation, system modification and at every
service in accordance with the manufacturer's
instructions. (Test kits are available from inhibitor
stockists.)
• For information or advice regarding any of the above
contact Technical Enquiries.
6.2 Bypass
1. The boiler is fitted with an automatic integral bypass.
6.3 System Control
1. For optimum operating conditions, the heating
system into which the boiler is installed should include a
control system.
2. Such a system will comprise of a timer control and
separate room or cylinder thermostats as appropriate.
3. The boiler should be controlled so that it operates on
demand only.
4. Operation of the system under control of the boiler
thermostat & TRV's only does not produce the best
results.
Publication No. 5111817