PART-SVN121A-EN 5
Removing the Existing VFD and Components
The section that follows will give the procedure to remove a TR1 VFD from its panel assembly and
remove the remote keypad in the IntelliPak I, IntelliPak II, and Voyager III main control panels.
Programming parameters are supplied with the VFD and a minimum of five must be set based on
unit specifications, see Table 4, p. 17.
VFD Removal from Back Panel Assembly
Locate the existing TR1 VFD unit enclosure near the return and exhaust section as shown in
Figure 1 and Figure 2, p. 5 for IntelliPak I units, adjacent to the supply/exhaust sections of IntelliPak
II Figure 3, p. 6 and opposite supply fans on the Voyager III units as shown in Figure 4, p. 6.
Identify the correct VFD for replacement. The IntelliPak I and II rooftops can have both supply and
exhaust/return VFDs. The IntelliPak I supply VFD is located on the back panel of the unit enclosure
and the exhaust/return VFD is located on the inner door of the unit enclosure which must be turned
to the open position for the VFD to be removed. The IntelliPak II supply VFD is adjacent to the supply
fan section, and the exhaust/return VFD is adjacent to the exhaust/return fan section. Voyager III
units only have supply VFDs and are located by the supply fan on the opposite side of the unit from
the control panel.
Figure 1. Typical IntelliPak I 20 to 75 ton configuration
SUPPLY FAN VFDSUPPLY FAN VFD
VARIABLE FREQUENCY DRIVEVARIABLE FREQUENCY DRIVE
ENCLOSUREENCLOSURE
EXHAUSTEXHAUST
FANFAN
VFDVFD
RETURN & EXHAUST SECTIONRETURN & EXHAUST SECTION
FILTER
SECTION
EVAP COIL
SUPPLY FAN SECTIONSUPPLY FAN SECTION
CONDENSER FANSCONDENSER FANS
COMPRESSOR SECTIONCOMPRESSOR SECTION
HEAT SECTIONHEAT SECTION
Figure 2. Typical IntelliPak I 90 to 130 ton configuration
HTG ACCESS
PANEL
HEAT SECTION
ELEC CONTROL
ELEC CONTROL
PANELPANEL
SUPPLY FAN SECTION
EVAP COIL
EVAP COIL
FILTER
SECTION
O/A DAMPERSR/A DAMPERS
RETURN & EXHAUST
EXHAUSTEXHAUST
FAN
FAN
VFDVFD
VARIABLE FREQUENCY DRIVEVARIABLE FREQUENCY DRIVE
ENCLOSUREENCLOSURE
SUPPLY FAN VFDSUPPLY FAN VFD
CONDENSER FANS
COMPRESSOR SECTION