98
5
Functional Description with Process Diagrams
5.2.6.5 Process Sequence Chart
Principle sequence of a valve leakage test
Fig. 5-16 Principle sequence of a valve leakage test
* Calibrate name with parameter
5.2.6.6 Calculation Example
If the pressure monitor is also deployed to monitor the minimum gas pressure (logic signal ’Fu-
el train pressure > min’), the monitor must then be configured to the burner's minimum gas
pressure. If the pressure monitor is only deployed for the valve leakage test, the monitor must
be configured to half the gas inlet pressure
p
ine
.
The valve leakage test time
t3
is configured on the MCC burner control unit.
t3
must be con-
figured so that the maximum permitted valve leakage rate
Q
Leak
is reliably detected. In EN
1643 and ISO 23551-4, the maximum leakage rate is given as 0.1% nominal volumetric flow
of the gas or a minimum of 50 l/h.
Example 1
Burner output = 1000 kW
Fuel = H natural gas, calorific value = 10 kW/m
3
Nominal gas volumetric flow = 100 m
3
/h
Max. leakage rate = 0.1 m
3
/h or 100 l/h
Example 2
Burner output = 1000 kW
Fuel = propane, calorific value = 25.9 kW/m
3
Nominal propane volumetric flow = 38.6 m
3
/h
Max. leakage rate = 50 l/h (not 38.6 l/h)
Signal bar
Significant times and their parameters
Standard
Signal must be present.
t2
Filling time of the gas train*
P313
2.0 s
Signal must not be present.
t12
Block and bleed time of the gas train*
P334
3.0 s
Signal can be present.
t17
Valve leakage test time
P311
2.0 s
Summary of Contents for AEC-TPS
Page 2: ......
Page 131: ...130 7 Operating Control and Displays 7 1 5 5 Deleting Curves Delete firing rate curve...
Page 148: ...147 7 Operating Control and Displays Channel configuration AL1 Fig 7 18 Channel configuration...
Page 157: ...156 7 Operating Control and Displays Fig 7 27 System CRCs menu...
Page 162: ...161 7 Operating Control and Displays Fig 7 32 IP setting menu...
Page 166: ...165 7 Operating Control and Displays Fig 7 35 Installation...
Page 167: ...166 7 Operating Control and Displays Fig 7 36 Installation...
Page 176: ...175 7 Operating Control and Displays Fig 7 49 Loading a protected dataset into the device...
Page 202: ...201 7 Operating Control and Displays Replacing a Module Fig 7 81 Module replacement menu...
Page 276: ...275 10 Maintenance 3 Restart CMS to complete the update...
Page 282: ...281 12 Appendix 12 5 EU Declaration of Conformity...
Page 283: ...282 12 Appendix...