CONTROLS:
On/Off Switch- Activates both DC to DC converter and DC to AC inverter.
Alarm On/Off Switch- for low input voltage audio alert silence.
Battery Voltage Test Switch- Push to read battery float voltage.
INDICATORS:
Converter Status.
Inverter Status.
Battery Status- Expanded scale voltmeter- 27.0 to 28.0 volts.
II. INSTALLATION:
IMPORTANT:
The battery used in the Dimensions UPS system is a Sealed, Valve-Regu-
lated, Gelled Electrolyte, Lead Acid type. The manufacturer is East Penn Manu-
facturing Co., Inc., Lyon Station, PA. East Penn manufactures this battery under
license of Sonnenschein Batteries, Budingen, Germany. The specific battery is
the DEKA Dominator Type 8GU1, 12V/31Ahr. This battery was chosen primarily
because it is a proven, sealed unit with the ability to withstand abuse including
vibration.
The application of the battery is one of No-Break Standby Float Service.
The only time the battery is called on to deliver energy is when main power
fails. The primary concern for this duty is float voltage verses temperature and
maximum temperature. The published optimum float voltage at 20
0
C(68
0
F) is
2.3V/cell. When temperature changes, the float voltage must change. This
relationship is specified as -3.3mV/degree C. An example would be 2.2V/cell at
50
0
C(122
0
F). This is also the maximum steady-state temperature the battery
should experience.
Because the Dimensions UPS enclosure is sealed to prevent particulate
infiltration, there will be a significant, (20
0
to 25
0
C), internal temperature rise
over ambient at full load with little external air passing over the cabinet. This
heat load is dissipated primarily by conduction through the aluminum housing
and enhanced by an internal circulating fan.
It is important that external air
flow around the enclosure not be restricted. We are close to maximum with ideal
temperatures. Dimensions UPS systems should be installed so that
surface temperatures do not exceed 70
0
C (158
0
F).
MOUNTING:
Bolt securely to a rigid system, keeping in mind the opening of both
external and internal doors for wiring and maintenance.
WIRING:
Use normal electrical wiring practice.
Provide an external switch/fuse box for the 250VDC input-
disconnect in a convenient location. Insure this switch is kept
OFF during installation.
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