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Thread: Trane CVHE LON Info
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11-26-2012, 10:14 PM #1
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Trane CVHE LON Info
Anyone have a file that says what all the points are? I have nvi#'s and nvo#'s but cannot find a description to verify each.
It's a CVHE-320 according to the prints.
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11-27-2012, 06:15 AM #2
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11-27-2012, 07:27 AM #3
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Here's all the info I can pull:
nvi
1 (switch), Chiller Ena
2 (AI temp), Cool Setpt
5 (%), Capacity Limit
6 (HVAC Mode), Mode
7 (AI invalid), Heat Stpt
21 (AI invalid),BaseLdgSetpt
22 (switch) BaseLdgReg
nvo
3 (switch), OnOff
4 (temp), ActiveSetpt
8-9 (%), ActualCap, CapLim
10-13 (AI temp), LvgChW, EntChW, EntCndW, LvgCndW
14 (string output), AlarmDescr
15 (chlr status), ChillerStat
23-24 (state), StatusOutputs, CprsrsRunning
25-28 (switch) EvapWtrPum, EvapWtrFlow, CondWtrPump, CondWtrFlow
29-30, 32-33, 37, 41, 49, 51 (AI invalid) Flow rates, SecTemps, Refrig Temps, Oil Temps
31 (%) ActiveBLSetpt
34-35, 38-39, 44-47 (AI in water) Refrig Press
36, 40, 48, 50 (AI temp) EvapRfgtTempC1, CondRfgtTempC1, OilTempA, DischTempA
58 (AI btu/hr) Unit Power
Granted some of the values I could likely guess correctly, but I'd rather just know for sure.
*Never mind, I just found it in NL220. Weird the front end doesn't pull the point details in...Last edited by crab master; 11-27-2012 at 07:44 AM. Reason: * and added descriptions found in NL220
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11-27-2012, 02:37 PM #4
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On the Chiller I interfaced with, the chiller enable needed to be commanded to 0% to stop and 100% to start. Setting up as a binary did not work. This chiller had a UC800 display.
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12-01-2012, 02:43 PM #5
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All the Trane binarys are a 2 part SNVT. they require a true/false and also a %. You could write the % to 100 all the time and switch the binary on/off and it would accomplish the task.
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