Cooling - Samlexpower SEC-1260A Owner's Manual

CAUTION!
3 stage charging is recommended for charging stand-alone unloaded batteries (there is no load
connected to the battery when it is being charged). If a load is also connected simultaneously,
a part of the charger's output current will be diverted to this load. Thus, the charger may
remain locked in Stage 2 if the current drawn by the load is more than the preset value of
threshold current determining change over from Stage 2 to Stage 3 .This will lead to over-
charging and loss of electrolyte.
For charging a battery when a load is also connected simultaneously, Stage 2 voltage should
be same as Stage 3. Select "Loaded Battery" with the help of DIP Switches (5) – See under
"Selecting the Type of Battery and Charging Stages".
The charger is cooled by convection and in addition, has a fan (11) for forced air cooling. The
fan will automatically switch on when the charger enters the Boost / Absorption Stage 2
(Charging Indicator LED (4) will be Orange) or the Bulk Charging Stage 1 (Charging Indicator
LED (4) will be Red). The fan will automatically stop when the charger enters Float Stage 3
(Charging Indicator LED will be Green). Please note that the fan will be off in the Float Stage
3 (The Charging Indicator LED will be Green).
The operation of the fan is controlled by the current supplied by the charger as follows:
Switches on when change over
from Float stage ("U" Phase)
to Boost stage ("Uo" Phase)
Switches off when change over
from Boost stage ("Uo" Phase)
to Float stage ("U" Phase)
In case the fan fails or if the cooling is not adequate due to higher ambient temperature,
inadequate air circulation or blockage of air ventilation openings, the thermal sensor for over-
temperature protection will shut down the output voltage of the charger. The Charging
Indication LED on the front panel will turn red ( On the Remote Panel, the red LED "I
Phase" will light, the green LED "Power" will, however, remain lighted). The charger will be
latched in this shut down condition and will not reset automatically even after the unit has
cooled down. To reset, the AC input power on / off switch (9) at the back of the unit has to
again.
be switched off and on

COOLING

SEC-1260A SEC-1280A
8.5 A +/- 1 A 10 A +/- 1 A
6 A +/- 0.5 A 8 A +/- 0.5 A 4 A +/- 0.5 A
Page 14
SEC-2440A
5 A +/- 0.5 A