Midmark Preva - Environmental Factors; Support Requirements; Electrical Requirements

Preva Installation/Service Manual, 00-02-1577, Revision E01
10
Environmental Factors
Use
The Preva Dental X-ray System is intended for indoor use for normal dental
applications at temperatures in the range +10 °C to +35 °C (+50 °F to +95 °F).
See the Specifications section on page
118 for complete temperature, pressure,
and altitude parameters for using, transporting, and storing the Preva system.
Support Requirements
The system is designed to mount on a single wood 2x4-inch drywall stud or
equivalent wall support. It can also be mounted on concrete or other similar wall
construction. Mounting to a plywood or particle board wall is not acceptable.
Verifying the wall support capability and the selection of the proper mounting
hardware is the responsibility of the installer.
Note that a two-stud wall plate assembly (30-A2042) is available to mount on two
wooden studs. A metal stud mounting kit (30-A2043) is also available.
The wall support and mounting hardware must withstand a 45.4 kg (100 lb.) shear
load and a 227 kg (500 lb.)
withdrawal force at each of the mounting bolts. The
wall fabrication and attachments to the building structure must be capable of
withstanding a load moment of 127 kg-m (920 lb-ft).
Electrical Requirements
Mains Power
Supply
The Preva Dental X-ray System requires a 3-wire single phase AC power mains
that contain line conductor, neutral conductor, and protective earth conductor. It
is recommended that the unit be installed with a dedicated electrical line
connected to a breaker with a minimum 15 amp rating. The wiring must provide
for a permanently grounded power line configuration.
Line Cord
Use
The installer must determine the suitability of installing the Preva with a line cord. If
a line cord is used, the installer must ensure that the unit is properly grounded and
has the required line rating.
Line Voltage
AC 100 V to 250 V, 50 Hz or 60 Hz (see complete specifications on page 118)
Fuse Rating
5 A, 250 V, UL Recognized (see complete specifications on page 118)
Max Line
Resistance
For normal function of the Preva Dental X-ray System the resistance of the power
line should not exceed 0.4 Ω at nominal line voltage.
Interlock
It is the owner’s responsibility to provide any visual interlock
indicators required by local ordinances.