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Refrigeration Maintenance
176
2. If the ball is not floating in the sight glass, the unit may be low on R-404A charge. Adjust the
controller setpoint to operate the unit on cool. Operate the unit on cool for 5 minutes. If the ball floats
in the receiver tank sight glass, the R-404A charge level is correct.
3. If the ball in the receiver tank sight glass does not float after operating the unit on cool for 5 minutes,
the unit is low on R-404A charge. With the unit operating on cool, add liquid R-404A charge. With
the unit operating in cool, add liquid R-404A until the ball in the receiver tank sight glass floats in the
sight glass.
NOTE: Inspect the unit for refrigerant leaks with a reliable leak detector if the unit is low on
R-404A charge.
Receiver Tank Sight Glass
The receiver tank contains a sight glass which has three small balls that indicate the level of refrigerant in
the tank for checking the refrigerant charge. A moisture indicator in the sight glass changes color to
indicate the level of moisture in the system. Check the color of the indicator against the color decal in the
sight glass. The dry eye in the sight glass is light green when the system is dry and yellow when the
system is wet (contains excessive moisture).
CAUTION: When adjusting the controller
setpoint to check refrigerant charge, be
sure to return controller to the setpoint
indicated on the shipping manifest.
1.
Moisture Indicator:
Light Green = Dry
Yellow = Wet
2.
Outer ring is color coded. Compare to
indicator.
Figure 156: Receiver Tank Sight Glass
AXA0371
Summary of Contents for 098203
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Page 3: ...MAGNUM TK 60275 4 MM Rev 3 08 15 Copyright 2012 Ingersoll Rand EMEIA Printed in Ireland...
Page 193: ...Refrigeration Maintenance 191 Figure 163 Filter Drier...
Page 200: ...Refrigeration Maintenance 198 Figure 169 Receiver Tank Figure 170 Water Cooled Condenser Tank...
Page 257: ...255 Schematic Diagram RELEASED 19 Sep 2013...
Page 258: ...256 Wiring Diagram Page 1 of 2 RELEASED 19 Sep 2013...
Page 259: ...257 Wiring Diagram Page 2 of 2 RELEASED 19 Sep 2013...
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