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Fig. D — Main Fan Replacement
(Frame Sizes R1-R4)
INTERNAL ENCLOSURE FAN REPLACEMENT
The VFD IP 54 / UL Type 12 enclosures have an additional in
-
ternal fan to circulate air inside the enclosure.
To replace the internal enclosure fan for frame sizes R1 to R4,
perform the following (see Fig. F):
1. Remove power from drive.
2. Remove the front cover.
3. The housing that holds the fan in place has barbed retain
-
ing clips at each corner. Press all 4 clips toward the center
to release the barbs.
4. When the clips/barbs are free, pull the housing up to
remove from the drive.
5. Disconnect the fan cable.
6. Install the fan in reverse order, noting the following: the fan
airflow is up (refer to arrow on fan); the fan wire harness is
toward the front; the notched housing barb is located in the
right-rear corner; and the fan cable connects just forward of
the fan at the top of the drive.
To replace the internal enclosure fan for frame sizes R5 or R6,
perform the following:
1. Remove power from drive.
2. Remove the front cover.
3. Lift the fan out and disconnect the cable.
4. Install the fan in reverse order.
5. Restore power.
CONTROL PANEL CLEANING
Use a soft damp cloth to clean the control panel. Avoid harsh
cleaners, which could scratch the display window.
Fig. E — Main Fan Replacement
(Frame Sizes R5 and R6)
Fig. F — Internal Enclosure Fan Replacement
BATTERY REPLACEMENT
A battery is only used in assistant control panels that have the
clock function available and enabled. The battery keeps the
clock operating in memory during power interruptions. The ex
-
pected life for the battery is greater than 10 years. To remove
the battery, use a coin to rotate the battery holder on the back of
the control panel. Replace the battery with type CR2032.
APPENDIX D
—
VFD INFORMATION (CONT)
Table I — Maintenance Intervals
MAINTENANCE
INTERVAL
Heat Sink Temperature Check and Cleaning
Every 6 to 12 months (depending on the dustiness of the environment)
Main Cooling Fan Replacement
Every 5 years
Internal Enclosure Cooling Fan Replacement
Every 3 years
Capacitor Change (Frame Size R5 and R6)
Every 10 years
HVAC Control Panel Battery Change
Every 10 years
2
3
3
4
3
2
Bottom View (R5)
2
3
Bottom View (R6)
Summary of Contents for WeatherExpert 48N2
Page 135: ...135 Fig 18 48 50N Typical Power Schematic Nominal 075 Ton Unit Shown ...
Page 136: ...136 Fig 19 48 50N Typical Power Schematic Nominal Ton 90 150 Units Shown ...
Page 137: ...137 Fig 20 48 50N Main Base Board Input Output Connections ...
Page 138: ...138 Fig 21 48 50N RXB EXB CEM Input Output Connections a48 9307 ...
Page 139: ...139 Fig 22 48 50N EXV SCB Input Output Connections a48 9308 ...
Page 140: ...140 Fig 23 48N Typical Modulating Gas Heat Unit Control Wiring ...
Page 141: ...141 Fig 24 50N Typical Electric Heat Unit Control Wiring ...
Page 144: ...144 Fig 27 48N Typical Gas Heat Section Wiring Nominal Ton 120 to 150 Units ...
Page 145: ...145 Fig 28 48 50N Typical Power Component Control Wiring 460 v ...
Page 146: ...146 Fig 29 48 50N Component Control Wiring 575 v Nominal Ton 075 to 150 Units ...
Page 147: ...147 Fig 30 48 50N Component Arrangement Power Box ...
Page 148: ...148 Fig 31 48 50N Component Arrangement Control Box ...
Page 240: ...240 APPENDIX D VFD INFORMATION CONT Fig G VFD Bypass Wiring Diagram WHEN USED ...