Safety valve (DHW cylinder)
Check the safety valve function every
six months by venting, or have it
checked by your heating contractor.
There is a risk of the valve seat
becoming contaminated (see the
valve manufacturer's instructions).
DHW filter (if installed)
Replace the filter element
&
on non-back-flushing filters, replace
the filter element every six months
(visual inspection every two
months),
&
on back-flushing filters, back-flush
every two months.
Inspection and maintenance
(cont.)
27
Repairs
55
92
453
GB
