Manu_ENG_UFO_ rev. 0_04_2012
pag. 13
NOTE for “SIT” TWO-STAGE gas valve
IMPORTANT:
-
for this version, a specific switch for pressure modulator feeding must be placed in the
main electric switchboard
modulator fed:
HIGH pressure running
modulator NOT fed:
LOW pressure running
-
start-up of the appliance must always take place with the modulator fed (HIGH
pressure running)
-
you will find the data (heat input, pressure and gas flow rate) referring to the
appliances with TWO-STAGE version, in the tables at page 6 of this manual.
N.B. – MINIMUM heating capacity
= feed L1 + N
– MAXIMUM heating capacity
= feed L1 + L2 + N
You will find the data (heat input, pressure and gas flow rate) referring to the appliances with
TWO-STAGE version, in the tables at page 6 of this manual.
The TWO-STAGE version allows:
save on gas consumption
better comfort condition for people
lower number of start-up / switch-off of the heater
power reserve for particularly cold winters