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00RNO0333-B (U0625869)
EVO S -
Installation and Servicing
B. REGULATION ACCESSORY REQUIRED
Quantity
Appliance reference
Order No.
Output sensor kit
1
QAC 34
219479
Diagrams: VF20, VF21, VF21bis
page 2 / 5
figure 27 -
VF21, VF21bis diagrams
The boiler operates in variable flow temperature according to the outdoor temperature measured by the
exterior sensor QAC 34.
The heating water law is programmed on the NAVISTEM B3000, with or without a low temperature limit
and with a weekly programme.
The flow rate of the heating pump, in m
3
/h, is adjusted to the real needs of the installation and, as a mini
-
mum, to P/25, with P power in th/h of the boiler.
The pump heating will have to allow to work in constant speed to insure the minimum flow necessary for
the generator.
