sy24inst2 - The Initiative Group

Rendamax
1 Description
1.1 General
In case the water volume flow over the unit is too low (high ∆T) this bypass directly returns flow
water to the secondary heat exchanger and thereby guarantees the minimum required flow in the
unit.
The pump installed in the bypass supplies the required head and capacity for the burner, 1 st heat
exchanger and the 2 nd heat exchanger and overcomes the resistance of these three parts. With a
high water flow (low ∆T) the pump only supplies little of it’s capacity as the volume flow complies
with the minimum required flow quantity. However a low water volume flow (high ∆T) forces the
pump to supply such a force that the minimum required flow over the unit is guaranteed.
The Rendamax unit equipped with a bypass and bypass pump supplies no remaining head for the
heating circuits. Further the bypass pump does not replace the system pumps and should not be
used for that purpose. The pump has to be switched in position 3 for all unit types.
Fig. 2
The Rendamax R300
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