WarmFlow WS18, Руководство пользователя

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When measuring the expansion vessel bladder pre-charge pressure, using a tyre pressure
gauge, the system must be cold (less than 25°C) and the system pressure must be relieved (by
manually operating the system pressure relief valve) in order to obtain an accurate reading.
3.4 System Filling
After the system has been properly filled the pressure gauge should read 1 bar when the
system is cold. The valve must be fully closed and the flexible filling loop removed from the
valve in accordance with building regulations. Expect a small water loss from the pipe.
3.4.1 System Filling
For the WS18 appliance a filling point complete with a filling loop is supplied fitted to the
expansion vessel. The filling loop
must be disconnected from the mains supply after filling. A
system pressure when cold of 1 bar is recommended. After filling, vent all air from the system.
The plastic plugs of the auto air vent(s) factory fitted to the appliance must be loosened when
filling the system in order to bleed the air from the appliance, and retightened when system
filling and venting has been completed.
3.4.2 System Pressure (WS 18 only)
Water loss from the system is indicated by a reduction in pressure on the pressure gauge. In
the first week of operation it is normal to see a drop in system pressure. After this time the
system pressure must be rechecked and the system refilled. Failure to do so may lead to
appliance faults.
The system pressure should be checked periodically by means of the pressure gauge at the
expansion vessel. The WS18 appliance comes complete with an integrated expansion vessel,
pressure gauge and filling loop. The minimum pressure, as indicated by the black needle, must
not be less than 0.5 bar when the appliance is cold and typically around 2.5 bar when the
appliance is at normal operating temperature. If the pressure is outside this range contact your
installer.
Frequent or routine refilling and topping up of the system should not be necessary on an
ongoing basis and may prove harmful to the appliance. Should topping up prove necessary on a
frequent or routine basis you must contact your installer.
Special attention must be given to the concentration of corrosion inhibitors in the system water
where there is a need for topping up or refilling. Inhibitor concentrations must be restored to the
concentrations specified by the inhibitor manufacturer.
3.4.3 Pressure Relief Valve
All models are fitted with a 3 bar pressure relief valve. The pressure relief valve must be able to
discharge externally to a drain where the discharge can be seen, and cannot cause any injury
or damage. No other valves should be positioned between the relief valve and discharge
termination.
3.4.4 Low Pressure Switch
Where there is a significant loss of water from the system the appliance thermostats may fail to
operate which would result in serious damage to the appliance. To prevent this, a low pressure
cut out switch set at 0.5 bar is fitted to the appliance. The switch will automatically reset when
the pressure is restored.