188/301 
Siemens Building Technologies  Basic Documentation LMV5...  CC1P7550en 
HVAC Products  11 Description of the connection terminals (AC 230 V)  13.08.2004 
 
 
Description of the connection terminals (cont’d) 
 
Terminal 
designation 
Connection symbol 
Input 
Output 
Description Electrical rating 
PIN2    x  Firing on oil  AC 230 V +10 % / -15 %, 50...60 Hz, 
1 A, cos
ϕ 0.4 
X8-01 
PIN1    x  Firing on gas  AC 230 V +10 % / -15 %, 50...60 Hz, 
1 A, cos
ϕ 0.4 
PIN4 
 
  x  Protective earth (PE)   
PIN3 
 
  x  Neutral conductor (N)   
PIN2 
 
  x  Wiring point for valves connected in se-
ries 
 
X8-02 
PIN1    x  Fuel valve V1 (oil)  AC 230 V +10 % / -15 %, 50...60 Hz, 
1 A, cos
ϕ 0.4 
PIN4 
 
  x  Protective earth (PE)   
PIN3 
 
  x  Neutral conductor (N)   
PIN2 
 
  x  Wiring point for valves connected in se-
ries 
 
X8-03 
PIN1    x  Fuel valve V1 (oil)  AC 230 V +10 % / -15 %, 50...60 Hz, 
1 A, cos
ϕ 0.4 
PIN4    x  Fuel valve V1 (gas)  AC 230 V +10 % / -15 %, 50...60 Hz, 
2 A, cos
ϕ 0.4 
PIN3    x  Fuel valve V2 (gas)  AC 230 V +10 % / -15 %, 50...60 Hz, 
2 A, cos
ϕ 0.4 
PIN2    x  Fuel valve PV (gas)  AC 230 V +10 % / -15 %, 50...60 Hz, 
2 A, cos
ϕ 0.4 
X9-01 
PIN1    x  Fuel valve SV (gas)  AC 230 V +10 % / -15 %, 50...60 Hz, 
2 A, cos
ϕ 0.4 
PIN2 
 
  x  Protective earth (PE)   X9-02 
PIN1 
 
  x  Neutral conductor (N)   
PIN4  x    Pressure switch-min-gas, start release 
gas 
AC 230 V +10 % / -15 %, 50...60 Hz, 
Imax 1.5 mA 
PIN3  x    Pressure switch-max-gas (DWmax-gas) AC 230 V +10 % / -15 %, 50...60 Hz, 
Imax 1.5 mA 
PIN2  x    Pressure switch-VP-gas / LT or valve 
closing contact (CPI) 
AC 230 V +10 % / -15 %, 50...60 Hz, 
Imax 1.5 mA 
X9-03 
PIN1    x  Power signal for pressure switch  AC 230 V +10 % / -15 %, 50...60 Hz, 
Imax 500 mA