VXC-2 Operations Manual June 2006
AcuTemp www.acutemp.com
7
rev. 4
The temperature within the VaxiCool will reach satisfactory levels for storing payload in
less than twenty-four hours of operation. Peak energy efficiency requires 24 hours of
continuous operation for stabilization (ambient temperatures less than 30°C {86°F}). AC
power is required for the first 24-hour period of operation to ensure the internal batteries
are fully charged and the unit has reached full operating efficiency. Once the unit is
stabilized and has fully charged batteries, it can be disconnected from external power and
operate as a portable unit using its internal batteries. Using internal batteries only the unit
can be operated as a freezer for up to 12 hours at ambient temperatures of 30°C (86°F).
If power is totally lost the holdover time below –20°C is limited to less than three hours.
The VXC-2 unit is not equipped with an on/off switch. This is a safety feature designed
to prevent accidental disruption of operation. The unit is “turned on” either by plugging
it into an AC power source or, if they are sufficiently charged, by connecting its internal
batteries. The batteries are connected to the unit through mating connectors
incorporating fusible links. Fusible links are wires that act as fuses to protect the
batteries in case of a short circuit. In the unlikely event that this fusible link is “blown”
repair of the unit at the factory or by a factory trained technician is required.
To start unit and ensure full battery charge, proceed as follows:
Step 1. Always start the unit using the AC power cord. Wait for 30 seconds and confirm
that the LEDs are illuminated, the LCD is displaying information, and the audible
alarm is on. Once these conditions are verified, disconnect the AC power cord so
that you can connect the batteries as described in Step 2. CAUTION: Using the
batteries to condition the unit will deplete the batteries much more quickly
than in stabilized operation. You must be prepared with a means of
recharging the batteries before they are depleted.
Step 2. Open the battery box cover on the front of the unit by removing the two cover
screws. The battery leads are pre-wired to the battery terminals and are
terminated through fusible links to a connector. To bring the batteries up to
