12
D.
Charging the Memory Backup Capacitor
The NCA-200 incorporates a large capacitor to provide power to maintain the
temperature and time setpoints while the unit is turned off. The operation of
this capacitor is similar to that of a rechargeable battery.
1. Before the NCA-200 is placed in service
Although the capacitor is fully charged at the factory, considerable time
may elapse before the unit is actually placed in service. Therefore, it is
recommended that the following procedure be followed before the unit
is placed in service.
Turn the NCA-200 on. The air pump may be turned off for quieter
operation. Leave the NCA-200 turned on for at least 12 hours to fully
charge the capacitor. The capacitor cannot be overcharged. A fully
charged capacitor is expected to maintain the setpoints for two weeks or
more.
2. During routine use of the NCA-200
The capacitor automatically charges whenever the unit is turned on. A
couple of hours per day of routine use should be sufficient to keep the
capacitor charged.
