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- Shut off the DHW flow by closing the ball valves (1a)
and (1b) for the cold water inlet and hot water outlet
respectively.
- Attach the flushing fluid supply to the cold water inlet
valve (2a).
- Attach the flushing fluid drain to the DHW outlet valve
(2b). Pump flushing fluid through the heat exchanger
until it is clean.
On completion of the installation, perform the checks listed in the table below.
DESCRIPTION
All automatic or manual filling pumps removed.
Safety valve calibrated to 6 bar, and flow open.
Drain pipe from safety valve routed suitably.
Expansion vessel correctly located and pre-charged to 2.5 bar.
FLUSHING THE HEAT EXCHANGER
CHECKS
13
2b
1b
2a
1a
OK
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