24
IN
ST
ALLER
U
SER
MAINTE
NA
NCE TECHN
IC
IAN
NG (G20)
LPG (G30)
HEAT
OUTPUT
HEATING
+
D.H.W.
BURNER
GAS FLOW RATE
PRESS. NOZZLES
PRESSURE
BURNER
GAS FLOW RATE
PRESS. NOZZLES
PRESSURE
(kW)
(m
3
/h)
(kPa)
(kg/h)
(kPa)
30,0
3,29
0,70
2,46
2,10
D.H.W.
14,8
1,53
0,19
1.14
0.55
3.16 VARIABLE HEAT POWER
N.B.:
the pressures indicated in the tables
between the gas valve outlet and the combustion
carried out using a di erential manometer
(small "U"-shaped column or digital manometer)
with the probes inserted in the pressure test gas
valve outlet and on the sealed chamber positive
Key:
1 - Modulating Coil
2 - Minimum power adjustment nut
3 - Maximum power adjustment nut
4 - Gas valve outlet pressure point
5 - Gas valve inlet pressure point
6 - From Sealed chamber to negative pressure tapping on manometer.
4
1
5
2
4
3
6
3-17
pressure test.