Mark MEGAFLEX, Техническое руководство

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The set point temperature of the storage tank is adjustable (default set at 60°C,the flow temperature is
DHW se 20K). Warning : if a CH heat demand exists immediately after finishing the heat request
for DHW, it is possible for high temperatures to flow into the CH system regardless of CH set point
(hot shot).
4.3.3 DHW priority/General behaviour with external storage tank
Disabling hot water operation: press Summer-Winter button R2-C4 (not active in main screen). See
later in manual for further explanation.
Enabling hot water operation: press Summer-Winter button R2-C4 (active in main screen). See later
in manual for further explanation.
In the default boiler configuration, (2 pumps-DHW and CH pump), a DHW request has priority over
CH request
In the technician menu, advanced DHW settings, DHW priority, the DHW priority over CH can either
be disabled or a maximum DHW priority time may be set.
In the case where the DHW priority is disabled and both demands are active at the same, both pumps
(CH and DHW) will be activated. During this time the flow temperature is set to either 80 °C (tank
thermostat) or DHW se 20K (NTC sensor).
Notice: At outputs ≥ 40 kW double separation between exchanging media is required.
4.4 Cascade
For cascade application see appendix “cascade”