15
4
Operating Description
4
Operating Description
(for specimen diagrams, see Appendix 9.8 Process Sequence Charts)
A signal is first fed to terminal 58 (Burner On) indicating when the burner is to start.
The ETAMATIC then interrogates the boiler safety interlock circuit or the common safety inter-
lock chain (ETAMATIC) and the contact of the air pressure monitor. If it does not detect an
"OK" condition, the text of a corresponding message appears and the operating control stops.
If all signals are OK, the fan output is activated and the ducts run to their bottom stop as a
check.
Once all channels have reached their bottom stop, they open for aeration. The leakage test
runs in parallel (gas operation only).
In the case of control elements the aeration is used to enter and/or test the range limits. After
reaching its top position, the fuel control element runs back into the ignition position. All other
channels remain in open position. The ETAMATIC then interrogates the air pressure monitor.
If this signal is OK, the parameterised aeration time runs. If a channel is configured for re-cir-
culation, it opens with a time-delay. On reaching the parameterised re-circulation delay time,
the aeration time stops. As soon as the re-circulation channel has reached the aeration posi-
tion, the aeration time is resumed. When this time has expired all the channels run to the pro-
grammed ignition position (re-circulation fully closed). After the lapse of the aeration time, all
channels run to the programmed ignition position (recirculation closed)
4.1
Starting without pilot burner
The main valves open and together with the ignition transformer remain activated for the du-
ration of the safety time. During this time the flame signal appears.
4.2
Starting with pilot burner
The ignition valve and main gas 1 (in gas operation) or the ignition valve alone (in oil operation)
run open. The pilot flame forms and the flame detection detects the flame. The flame detection
sends the signal to the burner control device.
On expiry of the 1
st
safety time, the ignition transformer switches off. For 3 sec. (stabilisation
time) the pilot burner burns alone. Then main gas 2 or the oil valve opens and remains acti-
vated in parallel with the ignition valve for the duration of the 2
nd
safety time. The ignition valve
closes again at the end of this period.
3 seconds after ignition, all channels run to the programmed base load point. The ETAMATIC
remains in base load position until control release is given.
After control release the ETAMATIC follows the power control unit’s default setting.
A shut off follows the cancelling of the signal of the terminal 58. The main valves close. In gas
operation, first main gas 1 and second main gas 2 closes with a delay of approx. 5 sec., in
order to allow the test line between the solenoid valves to burn out. In the event of a fault shut-
down, both close immediately.
If configured for post-ventilation, the air channels open again for this period.
Thereafter the ETAMATIC is in the "OFF" mode.
Summary of Contents for ETAMATIC
Page 1: ...Manual ETAMATIC ETAMATIC S CE 0085 AU 0207 Sensors and Systems for Combustion Engineering...
Page 2: ......
Page 7: ...6 Table of Contents 9 27 Dimensions and weight 128 9 28 Declaration of Conformity 131...
Page 65: ...64 8 Control Mode 8 2 1 Leakage test flow chart Fig 8 4 Flow chart leakage test...
Page 90: ...89 9 Appendix 9 8 Process Sequence Charts Fig 9 3 Process sequence chart gas with pilot burner...
Page 91: ...90 9 Appendix Fig 9 4 Process sequence chart oil with pilot burner...
Page 92: ...91 9 Appendix Fig 9 5 Process sequence chart gas without pilot burner...
Page 93: ...92 9 Appendix Fig 9 6 Process sequence chart oil without pilot burner...
Page 99: ...98 9 Appendix Fig 9 8 ETAMATIC S wiring diagram with ignition flame monitoring...
Page 104: ...103 9 Appendix Fig 9 16 LSB connection ETAMATIC LT1 other LAMTEC devices...
Page 134: ...133 9 Appendix...
Page 135: ......
