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  1. Jayguy, Thanks for the reply. I was able to go...

    Jayguy,
    Thanks for the reply. I was able to go through my local Trane salesman yesterday to conference in with a factory technical service rep and did get some answers. I'm not sure why they are so...
  2. Trane RAUJ 40 ton - wiring and sequence questions

    Could someone tell me the function and time delay settings of time delay relays 1DL8 and 1DL9?

    Also reset relays 1K11 and 1K12 appear that the coils would be deenergized anytime there is not an...
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    Tried enabling the zone in Commissioning Mode and...

    Tried enabling the zone in Commissioning Mode and then enabling Damper Calibration and the damper position nowreads out at 45% open and it is in Alarm. The damper Cal Ststus is also showing Alarm.
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    Excellent synopsis of Trane Summit Alcomech,...

    Excellent synopsis of Trane Summit Alcomech, thank you very much.
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    Great suggestions about actual vs computer read...

    Great suggestions about actual vs computer read out static pressures, thank you. It is a 10 year old building.
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    The problem with doing this (which has already...

    The problem with doing this (which has already been done by the way) is the minimum airflow setting of the box still allows enough air to overcool the zone. The two easiest fixes are to lower the...
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    The original customer complaint was overcooling...

    The original customer complaint was overcooling in the zone that always reads 97% on the ZNMAINT list. My observation was the fan always running and since I am trying to reduce energy usage, that has...
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    One more question - I have one zone that the VAV...

    One more question - I have one zone that the VAV box never closes, over cooling the space. On the Status Display Points list - "Damper Position" always reads 97% open. Yet when I look at the ZNMAINT...
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    The air source controller is a 33CSPREMLK...

    The air source controller is a 33CSPREMLK PremierLink controller and the terminal controllers are 33ZCVVTZC 3V Controllers.

    So in the ZNMAINT section I see the first line is "Occupied" on each...
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    You asked if I "download"ed after removing the...

    You asked if I "download"ed after removing the schedules. There is and "Apply" button on the schedule screen, is that what you are referring to?
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    Being staged by the Summit outputs directly to...

    Being staged by the Summit outputs directly to LSV's and compressor contactors (2 stages). Haven't noticed any objectionable air noise, but haven't really listened while they were calling for...
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    alcomech, Thank you for the thorough replies. As...

    alcomech,
    Thank you for the thorough replies. As I understand from your post, AREA controls MODE, so in your example as the temp drops from 73 to 71 will the system stay in the cool mode until it...
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    maxter, Yes the discharge air is reset from OA....

    maxter,
    Yes the discharge air is reset from OA. Above 80 OA it maintains 55 DA, below 75 OA it resets to 60 DA. Hasn't been too much time below 75 yet here in Florida so most of my experience on...
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    VAV's are controlling by their own wall sensors. ...

    VAV's are controlling by their own wall sensors.
    Biggest box is 1500 cfm, smallest is 90. Average box size around 500 cfm.
    I tried setting minimums to about 50% but still overcooling some of the...
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    Each VAV box/zone of course has its own sensor. ...

    Each VAV box/zone of course has its own sensor.

    I believe the reset was set up through analog outputs, there is a discharge air setpoint and if you go under setup, it looks at a property...
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    I agree that it seems like too much capacity for...

    I agree that it seems like too much capacity for the load. It is an occupied space, in operation for 10 years but not very efficiently. Just recently got involved with the account and trying to save...
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    Maxster, Presently IGV, soon to be converted to...

    Maxster,
    Presently IGV, soon to be converted to VFD. AHU's on the same level as the boxes and only 6-8 boxes per system. Not sure what minimum inlet static pressure the Trane boxes need to operate...
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    I have dropped the static from 1.5" to 1.3" and...

    I have dropped the static from 1.5" to 1.3" and it is controlling fine. Just leary of dropping the minimum airflows on the boxes too low since it is a DX system. You are right that the lower air...
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    Mike, I'm logged in at level 4 which I believe...

    Mike,
    I'm logged in at level 4 which I believe is the highest level.

    I can see/schedule occupied/unoccupied setpoints, just can't necessarily see a status for this.

    Thanks for your ideas.
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    When I look at the status page for each VAV it...

    When I look at the status page for each VAV it gives the "terminal mode"- either heat, vent or cool. I don't see anywhere that there is reference to occupied/unoccupied.

    Three of the zones say...
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    Mike, There were a bunch of schedules that I...

    Mike,
    There were a bunch of schedules that I removed, which I thought may have been keeping the fan running. When I removed them the fan didn't turn off.

    All zones are above their heating...
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    When you say override the damper, I assume you...

    When you say override the damper, I assume you mean the VAV box dampers. Since it is a DX system I can only go so low on the minimum air flows without worrying about low airflow/flood back to the...
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    All the zones are satisfied but the AHU continues...

    All the zones are satisfied but the AHU continues to cool. Really don't want to have the reheat come on when its 90 degrees outside, so it is locked out.
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    Trane Summit DX VAV setup Question

    I am involved with a Trane Summit system and three of the AC systems on the network are DX VAV systems. The VAV AHU systems are set up to control to a supply air temperature and the VAV's control to...
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    Trane Summit DX VAV setup Question

    I am involved with a Trane Summit system and three of the AC systems on the network are DX VAV systems. The VAV AHU systems are set up to control to a supply air temperature and the VAV's control to...
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