Unigas K990A, Installation Manual

Page: 84 / 112

Terminal
group
Connection symbol
Inpu
t
Out
pu
t Description of connection termi- nals
Electrical rating
X3-01 PIN1 x Fan motor contactor AC 230 V +10 % / -15 %, 50...60
Hz, 1 A, cos.0.4
PIN2 x Alarm AC 230 V +10 % / -15 %, 50...60
Hz, 1 A, cos.0.4
X3-02 PIN1 x Air pressure switch (LP) AC 230 V +10 % / -15 %, 50...60
Hz, Imax 1.5 mA
PIN2 x Power signal for air pressure switch (LP) AC 230 V +10 % / -15 %, 50...60
Hz, Imax 500 mA
X3-03 PIN1 x End switch burner flange AC 230 V +10 % / -15 %, 50...60
Hz, Imax 5 A
PIN2 x Power signal for end switch burner flange AC 230 V +10 % / -15 %, 50...60
Hz, Imax 5 A
X3-04 PIN1 x Safety loop AC 230 V +10 % / -15 %, 50...60
Hz, Imax 5 A
PIN2 x Power signal for safety loop AC 230 V +10 % / -15 %, 50...60
Hz, Imax 5 A
PIN3 x Protective earth (PE)
PIN4 x Supply voltage neutral conductor (N)
PIN5
x
Supply voltage live conductor (L) AC 230 V +10 % / -15 %, 50...60
Hz, fuse 6.3 AT (DIN EN 60 127
2 / 5)
X4-01 Fuel selection “internal” if pin 1-2 is not
used
PIN1 x Fuel selection gas AC 230 V +10 % / -15 %, 50...60
Hz, Imax 1.5 mA
PIN2 x Fuel selection oil AC 230 V +10 % / -15 %, 50...60
Hz, Imax 1.5 mA
PIN3 x Fan contactor contact (FCC) or flue gas
recirculation pressure switch AC 230 V +10 % / -15 %, 50...60
Hz, Imax 1.5 mA
PIN4 x Reset / manual lockout AC 230 V +10 % / -15 %, 50...60
Hz, Imax 1.5 mA
X4-02 PIN1 x Protective earth (PE)
PIN2 x Neutral conductor (N)
PIN3
x
Ignition
AC 230 V +10 % / -15 %, 50...60
Hz, 2 A, cos.0.2
X4-03 PIN1 x Protective earth (PE)
PIN2 x Neutral conductor (N)
PIN3
x
Start signal or pressure switch relief (air
pressure switch test valve)
AC 230 V +10 % / -15 %, 50...60 Hz,
0.5 A, cos.0.4