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4.8 FLUSHING THE HEATING SYSTEM
It is essential that the central heating system is thoroughly cleaned and flushed before fitting an Alpha InTec boiler.
Failure to do so will invalidate the warranty. The primary condensing heat exchanger is constructed in stainless
steel and therefore is compatible with most materials used in a heating system.
Where possible, the heating system should be cleaned before installing the boiler. A proprietary cleaner should
be used following the product manufacturers' instructions. After installation the system should then be filled and
flushed before final filling. A corrosion inhibitor approved by Alpha must be added to ensure that the heating system
operates effectively and efficiently, it is important to maintain the correct level of corrosion inhibition at all times.
The corrosion inhibitor should be checked annually at the time of the boiler service, and topped up if necessary. A further
dose of corrosion inhibitor should be added to the system every five years.
It is important to ensure that the correct level of inhibitor has been added, and that any cleaner residues have been
adequately removed to maintain the operation of the boiler and heating system. Failure to correctly clean and treat the
system will invalidate the boiler warranty.
If it is not possible to clean the system before fitting the new boiler, the system should be cleaned using a proprietary cleaner
and a magnetic filter connected in the return before the boiler as this is the most effective method of ensuring that any
magnetite and rust particles are prevented from entering and damaging the boiler.
Once the system condition has been restored, an effective magnetic filter and strainer should be fitted permanently to the
system as a method of collecting any magnetite and rust from the system during operation.
4.9 DISPOSAL OF CONDENSATE
Provision must be made for the safe disposal of condensate produced by the flue gases of the Alpha InTec boilers
and reference should be made to BS 6798 for the requirements on the disposal of condensate.
The boilers incorporate a condensate trap which has a seal of 75 mm, therefore no additional trap is required.
The condensate should ideally be discharged internally into an internal waste pipe (washing machine/sink waste) or soil pipe
to avoid the possible risk of freezing. The pipework must be in 22 mm pipe.
External pipe runs should be avoided, but if it is necessary, the pipework should be protected from the risk of freezing with
waterproof insulation and the length should be kept to a maximum of 3 m and the condensate pipework should be increased
to a minimum of 32 mm diameter. Termination should be into an external gulley or soakaway as shown in Figs. 4.6 and 4.7.
Note:
All pipework must have a continuous fall (see Figs. 4.6 and 4.7) from the boiler and must be of an acid resistant
material such as plastic waste pipe. (copper or steel is not suitable).
It should be noted that the connection of a condensate pipe to a drain may be subject to local building control requirements.
Optional Condensate Trace Heating Kit
An optional Alpha InTec trace heating kit is also available to prevent the condensate from freezing.
The control of this kit works with a unique patented design using the boiler PCB to control the trace heating. The outside
weather probe measures the external temperature, activating the trace heating cable only when the boiler is in operation
and producing condensate. This feature together with the latest technology variable resistance heating cable ensures only a
small amount of electrical energy is used.
If the external temperature drops below 2°C and the boiler is on, the relay PCB is operated and voltage is supplied to the
trace heating wire causing it to heat up and prevent the condensate from freezing. When the outside temperature rises to
4°C or the boiler pump stops, the trace heater is switched off. The connection of the outside weather probe supplied with this
kit also enables the weather compensation feature on the boiler.
Alpha InTec 40GS2 - General Boiler Information
Содержание InTec 40GS2
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