VYPER
™
VARIABLE SPEED DRIVE
INSTALLATION
100.200-IOM (SEP 13)
Page 24
PACKAGE-MOUNTED VYPER
™
The package-mounted version of the Frick Vyper
™
performs
identically to the remote-mounted versions. One advantage
of the package mounted version is that all electrical connec-
tions have been prewired and tested at the factory which
ensures proper installation of control and power lines. In
addition, the package-mounted Vyper
™
does not require
an additional dV/dt filter between the
FVS cabinet and the
motor. Package mounting is available for both 305 / 254 HP
and 437 / 362 HP versions. Both water or glycol connections
are possible and the optional IEEE 519 harmonic filter is also
available. The illustration below shows a 437 HP Vyper
™
cabinet mounted on a Frick RWF II 134 refrigeration pack-
age. Individual systems configurations will vary according to
model and horsepower sizes selected.
The Vyper
™
cabinet is mounted on a rectangular welded
steel channel, which provides both an attachment point for
the cabinet’s side brackets, and also helps to maintain the
rigidity of the cabinet during service. The channel assembly
/ VSD cabinet is mounted on two extension brackets welded
to pads on the system’s oil separator. All package-mounted
units are assembled with vibration isolators located between
the Vyper
™
channel frame and the extension mounting brack-
ets. The isolators help to minimize the exposure of internal
components and connections to cyclic vibrations during
shipping and operation.
Power supply to the motor is made via a conduit exit from
a rear panel in the Vyper
™
Cabinet. Control wiring in/out is
located at the lower left side of the cabinet.
Drive Disconnect Height –
covered under Exception 2, sec-
tion 8 of article 404 of the NEC, which states, Switches and
Circuit Breakers installed adjacent to motors, appliances, or
other equipment that they supply shall be permitted to be
located higher than 2.0 M (6 ft 7in) and to be accessible by
portable means.
BLOWER MOTOR ROTATION
The Blower Motor rotation is marked on the blower assembly
and is to be such that the blower draws into the assemly
through the screen and pushes down and through the motor.
Figure 13 - Blower Assembly
Figure 13a - Blower Motor Rotation
Figure 14 - Blower Motor Nameplate