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3
SYSTEM BALANCING
The boiler does not normally need a bypass but at least some radiators on the heating circuit, of load of at least 10% of the
minimum boiler output, must be provided with twin lockshield valves so that this minimum heating load is always available. See
note regarding thermostatic radiator valves on page 11.
Note. Systems incorporating zone valves which could completely cut off the flow through the system must also include a bypass.
BALANCING
1. Set the programmer to ON.
Close the manual or thermostatic valves on all radiators,
leaving the twin lockshield valves (on the radiators referred
to above) in the OPEN position.
Turn up the room thermostat and adjust the lockshield
valve to give an uninterrupted flow through the radiator.
These valves should now be left as set.
2. Open all manual or thermostatic radiator valves and adjust
the lockshield valves on the remaining radiators, to give
4
WATER TREATMENT
CENTRAL HEATING
The Logic System range of boilers have an ALUMINIUM
alloy heat exchanger.
IMPORTANT.
The application of any other treatment to this product may
render the guarantee of Invalid.
The manufacturer recommends Water Treatment in accordance
with the Benchmark Guidance Notes on Water Treatment in
Central Heating Systems.
If water treatment is used the manufacturer recommend only
the use of Scalemaster Gold 100,
SENTINEL-X100 or CALMAG CM100
water treatment products, which must be used in accordance
with the manufacturers' instructions.
Notes.
1. It is most important that the correct concentration of the
water treatment products is maintained in accordance with
the manufacturers' instructions.
2. If the boiler is installed in an existing system any unsuitable
additives MUST be removed by thorough cleansing. BS
7593:2006 details the steps necessary to clean a domestic
heating system.
3. In hard water areas, treatment to prevent lime scale may be
necessary - however the use of artificially softened water is
NOT permitted.
4. Under no circumstances should the boiler be fired before the
system has been thoroughly flushed.
14
GENERAL
FERNOX, MB-1, ADEY MC1,
inhibitors and associated
around 20
C temperature drop at each radiator.
o
3. Adjust the room thermostat and programmer to NORMAL
settings.
For further information contact:
Fernox Cookson Electronics
Forsyth Road
Sheerwater
Woking
Surrey GU21 5RZ
+44 (0) 870 601 5000
Sentinel Performance Solutions
The Heath Business & Technical Park
Runcorn
Cheshire WA7 4QX
Tel: 0800 389 4670
www.sentinel-solutions.net
Scalemaster Water Treatment Products
Emerald Way
Stone
Staffordshire ST15 0SR
Tel: +44 (0) 1785 811636
Calmag Ltd.
Unit 3-6, Crown Works
Bradford Road
Sandbeds, Keighley
West Yorkshire BD20 5LN
Tel: +44 (0) 1535 210 320
Adey Professional Heating Solutions
Gloucester Road,
Cheltenham GL51 8NR
Tel: +44 (0) 1242 546700
Installation and Servicing
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