Riello 20171510, Инструкции по установке, использованию и обслуживанию

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13 20171652 GB
Technical description of the burner
3.13 Burner operating sequence
Key to layout (Fig. 8)
Tab. G
Key to layout (Fig. 8)
FGR
FGR release
X01 Gas valve 1
X02 Gas valve 2
X04 Ignition transformer
X05 Gas pressure > min.
X06 Gas safety circuit
X07 Boiler safety circuit
X08 Air pressure switch
X10 Burner ON
X20+X21 Flame signal
X24
Fault
X25 Fan ON
X32 Air servomotor
X33 Fuel servomotor
X34 FGR servomotor
Fig. 8
20172248
Any condition
t1 Waiting time for safety circuits consent
(boiler fuel)
t2 Opening time of the gas valve (with
sealing control active) 2.4 s
t3 Servomotor opening time 30/60 s
t4 Activation time FGR servomotor 0 - t5
t5 Pre-purge time adjustable
t6 Pre-ignition time adjustable
t7 Ignition flame safety time 3 s
t8 Flame stabilization time adjustable
t9’ Safety time 2
nd
stage 3 s
t10 Modulation phase
t11 Adjustment time
t12 Opening time of the gas valve (with
sealing control active) 3 s
t13 Post-purge time adjustable
t15 Post-combustion time adjustable
t16 Checking time for flame extinction 5 s
t17 Checking time for gas valve (with seal-
ing control active) 30 s