12
Indep Combi -
Installation and Servicing
gENERaL
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 9.
Note.
Systems incorporating zone valves which could completely cut off the flow through the system must also include a bypass.
BaLaNCINg
3
sysTEM 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 hEa TINg
The Indep Combi range of boilers have an
aLUMINIUM alloy heat exchanger.
IMpORTaNT.
The application of any other treatment to this product may
render the guarantee of Ideal stelrad group Invalid.
Ideal stelrad group recommend Water Treatment in
accordance with the Benchmark Guidance Notes on Water
Treatment in Central Heating Systems.
If water treatment is used Ideal stelrad group recommend only
the use of Scalemaster Gold 100,
FERNOx-MB-1, ADEY MC1
or SENTINEL-x100
inhibitors and associated 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 manufacturer’s 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.
DOMEsTIC hOT W aTER
In hard water areas where mains water can exceed 200ppm
Total Hardness (as defined by BS 7593:2006 Table 2) a
scale reducing device together with Scalemaster in-line scale
inhibitor branded Ideal should be fitted into the boiler cold
supply within the requirements of the local water company.
The use of artificially softened water, however, is not
permitted.
Ideal stelrad group recommend the use of Fernox
Quantomat, Sentinel Combiguard and Calmag CalPhos I scale
reducing devices, which must be used in accordance with the
manufacturers’ instructions.
For further information contact:
Fernox Cookson Electronics
Forsyth Road, Sheerwater, Woking, Surrey
GU21 5RZ
+44 (0) 8706 015000
Sentinel Performance Solutions
The Heath Business & Technical Park
Runcorn, Cheshire WA7 4Qx
Tel: 0800 389 4670
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 210320
Adey Professional Heating Solutions
Gloucester Road, Cheltenham GL51 8NR
Tel: +44 (0) 1242 546700
around 20
o
C temperature drop at each radiator.
3. Adjust the room thermostat and programmer to NORMAL
settings.
