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20035745
26
GB
Start-up, calibration and operation of the burner
7.8.2
Steady state operation
System equipped with one control device TR
Once the starting cycle has come to an end,set 0-auto-man
se-
lector to auto the command of the 2
nd
stage solenoid valve pass-
es on to the control device TR that controls boiler temperature or
pressure.
When the temperature or the pressure increases until the
control device TR opens, solenoid valve 10)(Fig. 26) closes,
and the burner passes from the 2
nd
to the 1
st
stage of opera-
tion.
When the temperature or pressure decreases until the con-
trol device TR closes, solenoid valve 10) opens, and the
burner passes from the 1
st
to the 2
nd
stage of operation, and
so on.
The burner stops when the demand for heat is less than the
amount of heat delivered by the burner in the 1
st
stage.
In this case, the control device TL opens, and solenoid
valves 8)-9) close, the flame immediately goes out.
The fan's air gate valve closes completely.
Systems not equipped with control device TR (jumper wire
installed)
The burner is fired as described in the case above.
If the temperature or pressure increase until control device TL
opens, the burner shuts down (Section A-A in the diagram
Fig. 27).
7.8.3
Firing failure
If the burner does not fire, it goes into lock-out within 5 s of the
opening of the 1
st
stage valve and 30 s after the closing of control
device TL.
The control box red pilot light will light up.
7.8.4
Undesired shutdown during operation
If the flame goes out during operation, the burner shuts down au-
tomatically within 1 second and automatically attempts to start
again by repeating the starting cycle.
7.9
Final checks
Obscure the photocell and switch on the control devices:
the burner should start and then lock-out about 5 s after
opening of the 1st stage operation valve.
Illuminate the photocell and switch on the control devices:
the burner should start and then go into lock-out after about
10 s.
Obscure the photocell while the burner is in 2nd stage oper-
ation, the following must occur in sequence:
flame extinguished within 1 s, purging for about 20 s, spark-
ing for about 5 s, burner goes into lock out.
Switch off control device TL followed by control device TS
while the burner is operating:
the burner should stop.
Содержание RL 300/B MZ
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Страница 38: ...20035745 36 GB Appendix Electrical panel layout RL 300 B MZ ...
Страница 39: ...37 20035745 GB Appendix Electrical panel layout RL 400 B MZ ...
Страница 40: ...20035745 38 GB Appendix Electrical panel layout ...
Страница 41: ...39 20035745 GB Appendix Electrical panel layout ...
Страница 44: ...Subject to modifications RIELLO S p A I 37045 Legnago VR Tel 39 0442 630111 http www rielloburners com ...