42
3062347_0309
Selecting the pump stage / bypass
Fig.: Pump rate stages at the heating circuit pump
Bypass valve
The boiler is equipped with a three-stage pump that is
set to stage 2 in the delivered condition.
The minimum circulation volume is ensured by a
connection line between the flow and return. An
automatic overflow valve and a manually adjustable
bypass valve are integrated into the connection line.
In the delivered condition, the bypass valve is fully
opened to "MAX".
Closing the valve can increase the residual head.
(see "Selecting the pump stage / bypass").
Stage 1
Stage 2
Stage 3
Summary of Contents for CGG-2-18
Page 64: ...64 3062347_0309 Notes ...
