Sime RMG MK.II Serie Manual De Instalación página 48

a. 0. to. 50. µA. scale.. The. micro-ammeter.
terminals. must. be. series-connected. to.
the.wire.of.the.sensing.electrode..Under.
normal. operating. conditions,. the. value.
oscillates. between. 6. -. 10. µA.. The. mini-
mum. value. of. the. ionization. current. for.
which. the. equipment. can. "lock. out". is.
about.1.µA..
In. this. case,. make. sure. that. there. is. a.
good. electrical. contact. and. check. the.
degree. of. wear. of. the. end. part. of. the.
electrode. and. the. corresponding. cera-
mic.protection.
3.2 REGULATION THERMOSTAT
"RMG Mk.II" boilers. are. equipped. with.
a. regulating. thermostat. with. a. double.
contact. having. differentiated. setting. (6.
fig..2)..
This.makes.it.possible.to.obtain.a.reduc-
140
120
100
48
tion. of. heat. output. before. the. burner.
goes. out. completely,. by. means. of. the.
coil. assembly. installed. on. the. gas. valve.
regulator..
This.step-modulation.system.affords.the.
following.advantages:
–. higher.overall.boiler.efficiency;
–. containment. within. acceptable. values.
of. the. increase. in. temperature. that.
takes.place.in.the.cast-iron.body.(heat.
inertia).when.the.burner.goes.out.
3.3 SMOKE SAFETY DEVICE
"70 - 80 - 90 - 100 Mk.II"
MODELS
This. is. a. safety. device. against. possible.
smoke. emission. into. the. ambience. (8.
fig..2)..
The.safety.device.goes.into.action.by.blo-
cking.operation.of.the.gas.valve.when.the.
80
60
40
20
0
2.000 3.000 4.000
80
70
5.000 6.000 7.000 8.000
PORTATA.(l/h)
FLOW.RATE.(l/h)
return.of.the.smoke.into.the.ambience.is.
continuous. and. in. quantities. that. might.
constitute.a.danger..
To. restart. the. boiler,. the. cover. of. the.
thermostat. must. be. unscrewed. and.
reset.the.underlying.button..
Make. sure. the. control. panel. is. discon-
nected. before. carrying. out. this. opera-
tion.. Should. the. boiler. continue. to. "lock.
out",. it. will. be. necessary. to. make. a.
careful. check. on. the. flue. pipe,. making.
all. the. necessary. modifications. and.
amendments. so. that. it. can. work. pro-
perly.
3.5 SYSTEM AVAILABLE
HEAD (fig. 9)
The. head. available. is. shown. in. graph. in.
fig..9.
110
100
90
10.000 11.000
9.000
Fig..9