13
Installation and Servicing
SECTION 1 - GENERAL
The HIU does not normally need a bypass but at least some radiators on the heating circuit, of load of at least 10% of
the minimum HIU output, must be provided with twin lockshield valves so that this minimum heating load is always
available. See note regarding thermostatic radiator valves in 1.10 Heat Interface Control Interlocks
Note:
Systems incorporating zone valves which could completely cut off the flow through the system must also include a
bypass.
BALANCING
1.
Open the manual and thermostatic valves and lockshield valves on all radiators.
2.
Turn up room thermostat to create a heat demand and adjust the lockshield valve on each radiator to achieve the required
temperature differential (20 °C)(Temperature difference between the flow and return of the radiator) and fit the blanking
caps on the lockshield valves.
3.
Set any bypass valves or bypass radiators.
4.
Set the room thermostats and radiator thermostats to the desired temperatures.
1.15 WATER TREATMENT
1.14 SYSTEM BALANCING - CENTRAL HEATING
CENTRAL HEATING
The Ideal range of indirect HIU’s have a stainless steel CH
plate heat exchanger.
IMPORTANT.
The application of any other treatment to this product may
render the guarantee of Ideal Heating invalid. The use of
the optional Ideal Filter will aid against the build up of iron
oxide debris, however the water treatments listed below
are also recommended by Ideal Heating.
Ideal Heating
recommend Water Treatment in accordance with
the Guidance Notes on Water Treatment in Central Heating
Systems.
If water treatment is used Ideal Heating
recommend only the
use of
SCALEMASTER SM-1 PRO, 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.
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 HIU is installed in an existing system any
unsuitable additives MUST be removed by thorough
cleansing. BS 7593 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 HIU be
operated
before the system has been thoroughly flushed.
For Further information contact:
Fernox
www.fernox.com
Tel: +44 (0) 3301 007750
Sentinel Performance Solutions
www.sentinelprotects.com
Tel: +44 (0) 1928 704330
Scalemaster Water Treatment Products
www.scalemaster.co.uk
Tel: +44 (0) 1785 811636
Calmag Ltd.
www.calmagltd.com
Tel: +44 (0) 1535 210320
Adey
www.adey.com
Tel: +44 (0) 1242 546700
DOMESTIC HOT WATER
In hard water areas where mains water can exceed 200ppm
Total Hardness (as defined by BS 7593 Table 2) a scale reducing
device should be fitted to the HIU's cold supply within the
requirements of the local water company.
Ideal Heating 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.
