7
WARNING
Extreme caution must again be exercised so that the polarity of the batteries is preserved as it is
presented to the breaker. The "+" and "-" lugs on the breaker are indicated with "+" on the left and "-"
on the right. The "+" wire will be marked with white tape. If this code is not carefully followed,
maintenance personnel may be exposed to an electrical shock hazard that could result in death or
injury, or damage to the UPS or its electrical loads may occur.
Computer Terminal Connections:
It is also suggested, but not required, that you connect a terminal
or computer to the RS232 interface (see paragraph 2.2). Through this communications interface you
can obtain the same useful data available from the front panel LCD screen, along with some additional
diagnostic information.
Remote Status Panel Connections:
If the UPS is to be located in a remote area away from
personnel, an optional Remote Status Panel may be purchased that can be placed in a location that is
observable by personnel. Through its wiring interface to the “RELAY CONTACTS” connector on the
back of the UPS, this panel can alert personnel of any problems encountered by the UPS. Wiring
instructions are included with the remote status panel.
Preparation for Turn-On:
Having wired your UPS to the AC utility, to the load and to external batteries
(if so equipped), check the wiring with a continuity meter or other means. You may now begin the Turn-
On procedure. See the System Turn-on section of this manual.
2.1 ADDING AUXILIARY BATTERY CABINETS TO YOUR UPS SYSTEM
WARNING
Only qualified technicians or supervised personnel should attempt to connect/disconnect external
battery cabinets to/from the UPS models covered by this manual.
ALL
of the following
WARNINGS
and
INSTRUCTIONS
should be read and fully understood prior to undertaking this task. Otherwise,
maintenance personnel may be exposed to an electrical shock hazard that could result in death or
injury, or damage to the UPS or its electrical loads may occur.
If your system is configured with internal batteries, additional battery cabinets may be added to your
UPS to extend the backup time of your UPS. If the UPS cabinet does not have internal batteries, than
at least one battery cabinet must be incorporated into the UPS system to provide backup energy. It is
recommended that only battery cabinets supplied by Mesta Electronics be added so that complete
compatibility with your UPS can be guaranteed. Different manufacturers' battery cabinets may possibly
be used, but their use should be cleared with Mesta before doing so.
CAUTION
- not checking other
battery cabinets with Mesta Electronics may result in serious damage to the UPS and will nullify
warranty and UL compliance.
WARNING
Risk of
Electric Shock
. Do not attempt to connect/disconnect external battery cabinets to/from the
UPS unless the UPS external battery breaker and all external battery cabinet breakers are OFF.
Otherwise, maintenance personnel may be exposed to an electrical shock hazard that could result in
death or injury, or damage to the UPS or its electrical loads may occur.
