0
matically.start.up.again.
3.9
HEAD AVAILABLE
TO SYSTEM (fig. 14)
Residual. head. for. the. heating. system. is.
shown. as. a. function. of. rate. of. flow. in. the.
800
700
600
500
400
300
200
100
0
200
400
600
graph.in.fig..14..
The.speed.of.the.modulating.pump.system.
is. set. as. default. (installation. parameter. .
PAR 13 = Au)..
200
400
600
800
1000
1200
PORTATA (l/h)
4.1
GAS VALVE (fig. 16)
The. boiler. is. supplied. as. standard. with. a.
gas.valve,.model.SIT.848.SIGMA.(fig..16).
800
1000
1200
PORTATA.(l/h)
FLOW.RATE.(l/h)
ES
PT
ENG
Fig..14
101