Purpose Of Bypass Valve; Manually Operated Bypass Valve - Grundfos ALPHA2 L Series Installation And Operating Instructions Manual

Contents:
A
Systems with bypass valve
The purpose of the bypass valve is to ensure that the heat from the boiler
can be distributed when all valves in the underfloor-heating circuits and/or
thermostatic radiator valves are closed.
System elements:
• bypass valve
• flowmeter, pos. A.
The minimum flow must be present when all valves are closed.
The pump setting depends on the type of bypass valve used, i.e. manually
operated or thermostatically controlled.
Follow this procedure:
1. Adjust the bypass valve with the pump in setting I (speed I).
The minimum flow (Q
Consult the manufacturer's instructions.
2. When the bypass valve has been adjusted, set the pump according to
) for the system must always be observed.
min.
.
16
.