Dc-Kit2 With Dometic Ca2500 - Waeco ECL-76 Installation And Operating Manual

ECL-76, ECL-102, ECL-103 Technical description
6.4

DC-Kit2 with Dometic CA2500

 Roof air conditioner: Dometic CA2500
 Circuit diagram: fig. 3, page 5
 Charging current distributor: ECL-102
 Inverter: PerfectPower PP2002
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. 2/Batt. 2) 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.
With UD+ > Ue, contact I2 is closed with I3. This switches on the air conditioner.
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. 2/Batt. 2) is
opened. Relay contact I2/I3, which interrupts the connection between the on/off cable and
the air conditioner, is also opened.
The air conditioner compressor is switched off in this way. The light system now charges
the starter battery. If the vehicle 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 air conditioner compressor
starts again.
If the vehicle engine is not switched on (UD+ = 0 V), relay contact 30/87 (Batt. 2/Batt. 2)
is opened and relay contact I2/I3 is closed. 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.
EN
87