View Full Version : Carrier 30XA 200
08-21-2009, 04:47 AM
Could anyone help? Have a Carrier 30XA going out on Water flow switch, try to increase flow pressure.it is ok. Is there a way I could lower flow pressure set point?.Thanks.
08-21-2009, 08:58 AM
Off the top of my head I am pretty sure to the chiller its just a closed set of contacts...The switch it self has an adjustment if its external...Been a while since I worked on a XA mostly RA/RB's on my accounts...
Do you have a flow issue? Clean suction diffusers? you could close off the outlet valve slightly to keep the barrel full and help the switch close...:eek:
08-21-2009, 06:28 PM
Should be something like Leaving water temperature: 44 F (6.7 C)
Flow rate: 2.4 gpm/ton ( 0.043 l/s/kW)
Flow Sensor — The factory-installed flow sensor/switch
should not require adjustment.
Proper operation of this sensor/switch is necessary to allow
the unit to operate and provide running freeze protection for the
unit. When power is supplied to the switch, the amber LED in
the center of the display will be illuminated.
When there is chilled water flow, but the flow is inadequate
to close the switch and allow unit operation, one red LED will
illuminate. A red LED can also indicate inoperative pump(s),
closed valve, clogged strainer or air in the system.
When the first green LED is illuminated, the switch is
closed and the unit will start and run. Various conditions can
cause variations in flow and allow the switch to open and cause
a “nuisance trip”. Greater constant flow will help reduce nuisance
Measure the pressure drop across the cooler and use
Appendix E to determine the cooler flow rate then determine if
the flow rate is adequate for the application. A green LED does
not mean minimum flow requirements have been met.
08-21-2009, 07:26 PM
Thanks very much to both, it is been of great help
Powered by vBulletin® Version 4.2.0 Copyright © 2013 vBulletin Solutions, Inc. All rights reserved.