Siemens LMU64 Series - Electrical connection data

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Siemens Building Technologies Basic Documentation LMU54... / LMU64... CC1P7494en
HVAC Products 10 Technical data 07.11.2002
• Maximum overall current of all mains components connected
to the LMU… and the clip-in modules (at UN = AC 230 V; Tu = 60 °C) 5 A
• Mains extension (X1-02)
- Current depending on the current draw of the heating circuit pump,
programmable AC 230 V output, fuel valve,
DHW charging pump, external ignition module
and clip-in modules used
• Primary transformer / AC 230 V fan (X2-01)
- Voltage AC 230 V +10 % -15 %
• K1 (X2-02)
- Voltage AC 230 V +10 % -15 %
- Current 5 mA ... 1 A, cos ϕ > 0.8
• K2 (X2-03)
- Voltage AC 230 V +10 % -15 %
- Current 5 mA ... 1 A, cos ϕ > 0.8
• DHWK3 (X2-04)
- Voltage AC 230 V +10 % -15 %
- Current 5 mA ... 1 A, cos ϕ > 0.8
• Flame supervision / ionization probe (X2-05)
- Switching threshold (required DC) min. 0.7µA
- Current typ. 1.4 µA
max. 2.2µA
- Response time in the event of loss of flame < 1 s
- Electric shock hazard cannot be touched
- Flame detector cable length ≤ 1 m
Conductors L and N must be correctly connected!
• Safety temperature limiter (X3-01)
- Voltage AC 230 V +10 % -15 %
- Current 5 mA ... 1 A, cos ϕ > 0.8
power supply for
fuel valve and ignition
• Fuel valve (X3-02)
AC output AC 230 V +10 % -15 %
valve must still open at AC 175 V
- Current 5 mA ... 0.5 A, cos ϕ > 0.8
If a fuel valve with rectifier shall be connected to the fuel valve AC output, it can only
be made with the approval of Siemens!
In that case, additional protective measures inside the LMU... will be required
(optional electronic components).
RAC output RAC 230 V +10 % -15 % 100 Hz
valve must still open at RAC 175 V
- Pmax 20 W, cos ϕ > 0.9
General information about connection of the fuel valve:
- Max. cable length 3 m
- Max. leakage current at 1.06 x UNenn ≤ 0.5 mA
- Additional capacitive circuitry or protective elements
for limiting surge voltages not permitted
Electrical connection
data
Note
Note