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VARMAX -
Installation, Use and Maintenance
4.12.6. Boiler with 2 or 3 tappings
2 tappings
If all the circuits have the same return temperatures,
the return tapping located in the lower part must
be used.
U0501961-A
Flow
figure 27 -
Connection with 2 tappings
Clamp obstructing
2
nd
return
Return
3 tappings
VARMAX boilers are fitted with 2 returns and an
optimised internal water circuit allowing effective
separation of high temperature returns (coming
from DHW preparation circuits, radiators, etc.)
from low temperature circuits (underfloor heating
circuits, low temperature radiator circuits, etc.).
This circuit separation encourages the
condensation of flue-gases in the lower part of
the condenser throughout the year, and therefore
considerably increases the boiler's performance.
To use the 2
nd
return, the clamp obstructing the
tapping must be removed.
U0501961-A
figure 28 -
Connection with 3 tappings
Flow
2
nd
return
hot return (high temperature
circuit)
1
st
return
cold return (underfloor
heating and low
temperature radiators)
