Supplied By www.heating spares.co Tel. 0161 620 6677
When filling the system with water, perfect purging of air in both the boiler and the heating circuit must be carried out. Depending
on the water composition and the expected quantity of sludge, cleaning the boiler of sludge is recommended about a week after
commencing operation.
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Installation of a sludge separator is recommended in the incoming branch of heating water. The design of the separator
should enable regular removal of sludge without necessity to discharge large quantities of heating water. The sludge
separator can be combined with a filter; however, a filter itself is not a sufficient protection. Both the filter and the separator
should be regularly checked and cleaned. The warranty does not cover mechanical defects caused by foreign bodies and
impurities (cf. the Guarantee Conditions).
3.6. Anti-Freeze Mixtures
The boilers are not designed for anti-freeze mixtures (even if water with prescribed parameters were used for preparation of such
mixtures – care is necessary – chemical reactions between anti-freeze agents and the water-treatment agents can have adversary
effects!)
All anti-freeze mixtures have the following undesirable features:
a)
Reduction of the heat transmission coefficient (thicker laminar film on internal walls) - up to a 20% reduction;
b)
Volume thermal expansion of mixtures is higher than that of water (for mixtures about 10%, water only 3 – 4%)
c)
The mixtures deteriorate in time, their anti-freeze resistance decreases as thy "age."
Last but not least, dealing with large quantities of chemicals is complicated. Most substances are not allowed to be discharged to
the sewage system, the "harmless" deposits in the heating systems may get activated, etc. It is therefore necessary to consider the
necessity of their use.
In general, it is always better to use anti-freeze mixtures than to let the system freeze – but the manufacturer is not liable for any
defects implied by such use.
3.7. Heating System – Properties and Filling
The boilers are connected to the heating circuit (G 1") and gas supply (G 3/4") pipes so that the pipe fixtures on the boiler should
not be affected by any pressures or tensions. The fixtures on the boiler have outside (male) threads.
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Closing valves are recommended to be installed on the pipe branches connected to the boiler – otherwise the water would
have to be discharged from the heating circuit if repairs are needed.
The heating circuit must be designed so that the heating water is allowed to circulate through at least one radiator all the time.
The boiler itself is not equipped with an expansion vessel or safety valve – hence it can only be connected to heating systems that
comply with the corresponding standards and regulations.
The boiler can be installed in systems with either open or closed (pressurised) expansion vessel – if the open expansion vessel is
used, however, the temperature settings of the emergency thermostat must be adjusted and the range of the heating-water
temperature mist be restricted – only authorised service centres are authorised to adjust these settings!
The water level in an open expansion vessel must be correct (between the minimum and maximum operational limits). Closed
expansion vessels must be adjusted during the water filling, depending on the heating circuit parameters.
The boiler is equipped with a filling/discharge valve. When filled, the system must be properly purged.
The boiler may be connected to the heating circuit by flexible elements (hoses) during reconstructions, if necessary because of the
layout, etc. Such hoses must have parameters suitable for the purpose, should be as short as possible, protected from damages
caused by mechanical load and chemical agents, and replacement must be arranged always prior to the end of the life-cycle and/or
deterioration of their parameters (according to their manufacturer's instructions).
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Prior to the final assembly, the heating-circuit pipes should be flushed by pressure water, several times. For older circuits
(that have already been in use) the flushing stream direction must be opposite to that of the heating water.
3.8. Location of Boiler
If there are any special requirements concerning transportation of the boiler (such as preventing the covers from damage when the
boiler must be carried through narrow spaces), the boiler may be partially disassembled.
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