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Trane rtac200 2006 alarm issues
I'm having issues with a rtac200 closing the alarm relays #1 and #2 for a "low chilled water temp: unit off" in the colder nights. The temp will typically be around 36 and 38* ENT/leaving when I arrive in the am and will show the alarm which is auto reset. I have changed the alarm options to latching alarms only which has taken care of the problem but there is no way to have a circuit specific latching alarm relay. So I have no way on the front end to know if either circuit is in alarm or both. I do have glycol in the system and pump control set above my freeze point for protection. The configuration in the chiller for evap is "with freeze protection". Also i will get alarm for evap water flow overdue as the chiller wants to control the pump but the bms is and sometimes a low evap temp unit off.
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What are you trying to do have it not generate the low water temp alarm?
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What is your question?
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Life's tough, it's even tougher if your stupid
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Let the chiller control the pump. Problem solved!
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Originally Posted by
cperk
Let the chiller control the pump. Problem solved!
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Im sure it says that somewhere in the IOM .........
OH yeah what was I thinking ......thats the thing that no one ever reads
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Yes. I don't want it to generate alarms anymore. I looked and couldn't find a setting for this.
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Originally Posted by
michael26
Yes. I don't want it to generate alarms anymore. I looked and couldn't find a setting for this.
There is no setting for this.
It is generating the alarm because you are at risk for damaging the barrel. The IOM requires that the chiller control the evap pump for freeze protection. If the pump were running, I doubt you would be getting this alarm.
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Originally Posted by
michael26
Also i will get alarm for evap water flow overdue as the chiller wants to control the pump but the bms is and sometimes a low evap temp unit off.
And right here is the problem. The IOM specifically states that the chiller must control the pumps. There is also a sticker on the front of the chiller that stated this.
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Ok. Thanks guys. That's what I was afraid of.
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I don't think there's anything that say you can't control the pump from both. Have 2 RIB relays, one labeled chiller and the other, BMS. That way, if the chiller needs to run the pump, it can. If they want to cycle it through the BMS, it can. If the BMS crashes, you can still run the chiller in local and it'll control the pump.
Just a thought.
-----Stop, step back, relax and have another go at it.-----
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Originally Posted by
BennyD
I don't think there's anything that say you can't control the pump from both. Have 2 RIB relays, one labeled chiller and the other, BMS. That way, if the chiller needs to run the pump, it can. If they want to cycle it through the BMS, it can. If the BMS crashes, you can still run the chiller in local and it'll control the pump.
Just a thought.
That is allowed and done all the time.
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Don't forget to include automatic isolation valves in the pump control, if there are any.
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Originally Posted by
Nuclrchiller
Don't forget to include automatic isolation valves in the pump control, if there are any.
Good call. That would be bad!
-----Stop, step back, relax and have another go at it.-----
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When you have glycol in the system you you should also change the "leaving water temp cutout" and "low refrigerant temp cutout". You change the cutout temps based on the percentage of glycol in the system. You can find the chart in the IOM. Factory default setpoints are 36 for water cutout and 28 for refrigerant cutout. Making these changes per the glycol will stop the alarm from coming up so often being that you have protection below 32 degrees.
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Originally Posted by
Dan0721
When you have glycol in the system you you should also change the "leaving water temp cutout" and "low refrigerant temp cutout". You change the cutout temps based on the percentage of glycol in the system. You can find the chart in the IOM. Factory default setpoints are 36 for water cutout and 28 for refrigerant cutout. Making these changes per the glycol will stop the alarm from coming up so often being that you have protection below 32 degrees.
THIS^^^^
If the chilled liquid loop has the sufficient glycol concentration for the lowest expected OA temps, the need to start the pump for freeze protection purposes becomes moot.
As per the manual, adjust the "low chilled water temp cutout" 5* ABOVE solution freeze point and "Low ref temp cutout" 4* BELOW the freeze point.
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There's a setting in the CH530 that only Trane can change for your Freeze protection setpoint. You need to contact them. Was it originaly purchased for Glycol? If so, the factory start-up tech should have set it according to your % of Glycol in your system.
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Originally Posted by
MusgroveM
There's a setting in the CH530 that only Trane can change for your Freeze protection setpoint. You need to contact them. Was it originaly purchased for Glycol? If so, the factory start-up tech should have set it according to your % of Glycol in your system.
There are no settings in the RTAC CH530 controller that only Trane techs can set.
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It's kestrelView. It has a higher authority than TechView to change the units configuration. Go ahead and try to change your freeze protection setpoint.... It won't work without KestrelView.
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Originally Posted by
MusgroveM
It's kestrelView. It has a higher authority than TechView to change the units configuration. Go ahead and try to change your freeze protection setpoint.... It won't work without KestrelView.
You are absolutely 100% wrong. TechView has the same set points as KestrelView. The only thing KestrelView has that TechView doesn’t have is better reports, trending, and different binding view. And you can trend with TechView using Microsoft Excel.
I see you’re new here. You are going to start another huge fight posting that inaccurate information about KestrelView and saying the OP has to call Trane to change the freeze set points.