Dc Kit 3 With Dometic B1600 / Hb2500 - Waeco ECL-75 Installation And Operating Manual

_ECL-75_102.book Seite 38 Donnerstag, 6. Mai 2010 4:43 16
Technical description
6.7

DC kit 3 with Dometic B1600 / HB2500

Circuit diagram, see page 9
Roof air conditioner: Dometic B1600 / HB2500
Charging current distributor: ECL-102
Inverter: SinePower SP1500 (item no. MSK1500-012)
The light system voltage UD+ is measured. If this voltage exceeds a variable voltage
value Ue (12.5 V - 14.0 V), the relay contact 30/87 (Batt. I/Batt. II) of the power relay is
closed. The starter battery and the additional battery are therefore connected in parallel
with low resistance and are charged together by the light system.
Note
The system is not connected to the ECL-102 using an on/off cable. The D+ signal
is run via the relay contact l2 onto I5 and connected to the remote control.
Contact I2, I5 is opened with UD+ > Ue and this switches the air conditioner on.
If the light system voltage falls below a variable threshold value Ua (10.5 V - 12.5 V),
due to an increased load because of the air conditioner, relay contact 30/87 (Batt. I/Batt.
II) is opened. The relay contact I2, I5 is closed and switches the inverter off via the remote
control.
The air conditioner is therefore without voltage and does not work. The light system
charges the starter battery. If the caravan has a connecting cable between the two
batteries, the additional battery is also charged.
If the charging voltage of the light system UD+ reaches the set voltage value Ue again,
the power relay and the control relay switch on again. The relay contact I2, I5 is opened
and switches the inverter on again. The CA1000 and CA2500 can be switched on by the
operator again; the B1600 restarts automatically.
If the vehicle engine is not switched on, UD+ = 0 V, relay contact 30/87 (Batt. I/Batt. II)
and relay contact I2, I5 are opened. The air conditioner can be operated and only takes
power from the additional battery. If the battery voltage falls below Ubatt = 10.5 V, the
inverter switches off.
38
ECL-75, ECL-102