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Siemens Building Technologies Basic Documentation LMU54... / LMU64... CC1P7494en
HVAC Products 10 Technical data 07.11.2002
• External ignition module (X3-03)
- Voltage AC 230 V +10 % -15 %
- Current 5 mA ... 0.5 A, cos ϕ > 0.8
must still ignite at AC 175 V
- Max. cable length 3 m
With regard to switch-on and switch-off characteristics, every type of external
ignition module used must be approved by Siemens !
• Integrated ignition module (X3-04)
- Min. sparking power / pulse 3 mJ at 2 kΩ
- Max. sparking power / pulse 4 mJ at 2 kΩ
in the range of 175 V ... 253 V
- Min. pulse sequence 10 Hz at 175 V
- Max. pulse sequence 25 Hz at 253 V
- Electric shock hazard cannot be touched
- Open-circuit voltage 20 kV
- Max. no-load operation 30 s
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