Draining taps MUST be located in accessible positions, which
permit the draining of the whole system - including the boiler
and hot water storage vessel. They should be at least 1/2” BSP
nominal size and be in accordance with BS. 2879.
The central heating system should be in accordance with the
relevant standards listed on page 8.
Due to the compact nature of the boiler the heat stored within the
castings at the point of shutdown of the burner must be dissipated
into the water circuit in order to avoid overheating. In order to
allow pump operation after burner shutdown the boiler control box
incorporates a 4 minute pump overrun facility. In order to make use
of this, the pump must be supplied from the terminals inside the
boiler. Note: for pumps requiring a current greater than 1.3 amps
inductive, they must be connected via a relay.
When sizing pumps, reference should be made to the table below
which show the boiler resistance against ow rates, to achieve the
required temperature differential.
Flow rates for common systems using either 11ºC, 15ºC or 20ºC
temperature differentials and hydraulic resistances are given in
the table below.
Flowrate (l/min) Hydraulic Resist-
ance (mbar)
11ºC 15ºC 20ºC 11ºC 15ºC 20ºC
40/40P 52.1 38.2 28.7 875 405 225
60/60P 78.2 57.3 43.0 435 180 83
80/80P 104.2 76.4 57.3 750 420 180
100 n/a* 95.6 71.7 n/a* 315 134
120 n/a* n/a* 86.0 n/a* n/a* 218
150 n/a* n/a* 107.5 n/a* n/a* 230
* Models with n/a are due to excessive owrates which will
cause erosion of the casting.
Note.
• With the boiler ring at maximum rate, the temperature
differential should not be less than gures quoted in table above.
High ow rates required for lower temperature differentials could
lead to errosion of the heat exchanger water ways.
• With the boiler ring at minimum rate, the temperature differential
should not be greater than 35
o
C. Lower ow rates generating
higher temperature differentials will lead to lock out of the boiler.
• The lower the return temperature to the boiler, the higher the
efciency.
In installations where all radiators have been provided with
thermostatic radiator valves, it is essential that water circulation
through the boiler is guaranteed. This can be best achieved
by means of a differential pressure valve, which is installed in a
bypass between the ow and return pipes. The bypass should
be tted at least 6m from the boiler, and should use a minimum
size of 28mm pipe. The bypass should be capable of allowing
a minimum ow rate to achieve a temperature differential of no
greater than 35
o
C at minimum rate.
WATER TREATMENT
These boilers incorporate an ALUMINIUM heat exchanger.
IMPORTANT. The application of any other treatment to this
product may render the guarantee of Ideal Boilers INVALID.
Ideal Boilers recommend Water Treatment in accordance with
Guidance Notes on Water Treatment in Central Heating Systems.
If water treatment is used Ideal Boilers recommend only the
use of
SCALEMASTER GOLD 100, FERNOX, MBI, ADEY MC1,
SENTINEL X100 or CALMAG CM100 inhibitors and associated water
treatment products, which must be used in accordance with the
manufacturers’ instructions.
In hard water areas where mains water can exceed 200ppm
Total Hardness (as dened by BS 7593:2006 Table 2) a scale
reducing device should be tted into the boiler cold supply within
the requirements of the local water company. The use of articially
softened water, however, is not permitted.
Ideal Boilers recommend the use of Fernox Quantomat, Sentinel
Combiguard,Calmag CalPhos I scale reducing devices or
Scalemaster In-line Scale Inhibitor branded Ideal, 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.
3. In hard water areas, treatment to prevent lime scale may be
necessary - however the use of articially softened water is
NOT permitted.
4. Under no circumstances should the boiler be red before the
system has been thoroughly ushed.
For further information contact:
Fernox Alent Plc
Forsyth Road, Sheerwater, Woking, Surrey GU21 5RZ
+44 (0) 8706 015000
Sentinel Performance Solutions
7560 Daresbury Park, Daresbury, Warrington, Cheshire WA4 4BS
Tel: 0800 389 4670
Scalemaster Water Treatment Products
Emerald Way, Stone, Staffordshire ST15 0SR
Tel: +44 (0) 1785 811636
Calmag Ltd.
Riverview Buildings, Bradford Road, Riddlesden, Keighley,
West Yorkshire BD20 5JH
Tel: +44 (0) 1535 210320
Adey Professional Heating Solutions
Gloucester Road, Cheltenham GL51 8NR
Tel: +44 (0) 1242 546700
ELECTRICAL SUPPLY
Wiring external to the appliance MUST be in accordance with
the current I.E.E. (BS7671) Wiring Regulations and any local
regulations which apply. For Ireland reference should be made to
the current ETCI rules for electrical installations
The point of connection to the mains should be readily accessible
and adjacent to the boiler.
CONDENSATE DRAIN
Refer to Frames 27, 28 & 62
A condensate drain is provided on the boiler. This drain must be
connected to a drainage point on site. All pipework and ttings in
the condensate drainage system MUST be made of plastic - no
other materials may be used.
IMPORTANT.
Installation must be in accordance with BS 6798.
The drain outlet on the boiler is sized for standard 21.5mm (3/4”)
overow pipe. It is a universal tting to allow use of different
brands of pipework.
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