Glow-worm Clearly Solar Cylinders - Manual (Page 25)

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MAINTENANCE
MaINTeNaNCe
11 Inspection and maintenance
Glow-worm solar systems are designed to give a long trouble free
life.
In order to ensure this, an annual inspection of the solar circuit
should be carried out by a competent person approved at the time
by the Health and Safety executive . This would be carried out at
the same time as the boiler and cylinder inspection and comprise
mostly of visual checks.
Inspection access to the cylinder is available through the
immersion heater boss.
Where secondary return circuits are used then an additional
expansion vessel may be required.
The essential maintenance work on the solar system and
corresponding maintenance intervals are specified in the
following table.
After servicing, the servicing engineer must complete the relevant
Service Interval Record section of the Benchmark Checklist
located on the inside back pages of this document.
When replacing parts, only use original replacement
parts from Glow-worm.
11.1 Maintenance checklist
Nature of maintenance work Maintenance interval
Cylinder
Check all connections to ensure no leaks
Annually
Check the temperature and pressure relief valve Annually
Checking the expansion relief valve Annually
Check the charge pressure of the hot water expansion vessel, re-pressurise as necessary Annually
Check water flow rates are correct (Check and clean filters as necessary) Annually
Ensure set temperatures are correct Annually
Check the hot water thermostat mixer function Annually
Fill in the service section of the benchmark cylinder commissioning checklist Annually
11.2 Draining the cylinder
• Close the cold water feed line.
• Secure a hose to the drain valve.
• Place the free end of the hose in a suitable discharge position.
The opening should be around 1 m beneath the cylinder.
• Open the highest hot water draw-off point to reduce the
pressure and bleed the water pipes, thus draining them
completely.
• Open the cylinder drain valve and leave open until no more
water escapes and the cylinder is completely empty.
• Once the water has drained out, close the hot water draw-off
point and the drain valve.
• Remove the hose from the drain valve.