Dometic GROUP WAECO ECL-75 Instructions De Montage Et De Service page 37

_ECL-75_102.book Seite 37 Donnerstag, 6. Mai 2010 4:43 16
ECL-75, ECL-102
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.
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. I/Batt.
II) is opened. The relay contact I2, I3, is also opened and switches the compressor off.
The light system now charges the starter battery (the fans consume little power).
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 air conditioner compressor
starts again.
If the vehicle engine is not switched on, UD+ = 0 V, relay contact 30/87 (Batt. I/Batt. II) 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.
6.6 DC kit 3 with Dometic B2200 / B1600 Plus
Circuit diagram, see page 8
Roof air conditioner: Dometic B2200 / B1600 Plus
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.
Contact I2/I5 is opened with UD+ > Ue. 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. I/Batt. II) is
opened. The relay contact I2/I5 is closed and switches the air conditioner compressor off.
The light system now charges the starter battery (the fans consume little power). 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 air conditioner compressor
starts again.
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.
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Technical description
37