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  1. Thread: Thermistors

    by narkom
    Replies
    12
    Views
    591

    Excellent post! Would you please to clear one...

    Excellent post!
    Would you please to clear one more thing. Why the different types of probe are in use. I mean NTC10k, Pt1000, NTC3k, Pt100 etc.
    Which are advantage and disadvantage of each type?
  2. The readings are indoor units inlet temperature,...

    The readings are indoor units inlet temperature, so it may differ.
  3. Replies
    7
    Views
    363

    Look here...

    Look here
    http://old.mylinkdrive.com/MrSlim/mea/webindex.htm
  4. Replies
    14
    Views
    892

    Yes, the fan spinning in the correct direction as...

    Yes, the fan spinning in the correct direction as the arrow on the fan shows.
    Not sure if the fan and evap. coil are clean. It is a 24hrs restaurant with the kitchen and smoking area. Gonna check...
  5. Replies
    14
    Views
    892

    Yes, there could be a lot of restriction besides...

    Yes, there could be a lot of restriction besides the curb adapter. Because the air flows via the flexible ducts system.
    The hot water coil was surely removed from the unit as it was damaged with...
  6. Replies
    14
    Views
    892

    The tripping is manual reset, but anyway it takes...

    The tripping is manual reset, but anyway it takes time to cool down. In accordance with technical data I should have 2200 CFM and even more. Im going to check the belt tension.
    The heater is custom...
  7. Replies
    14
    Views
    892

    Only common words on the page 42 instead. Thanks...

    Only common words on the page 42 instead. Thanks anyway.



    Yes, it is a downflow discharge unit mounted on a roof curb adapter.
    The heating element was instaled instead of the hot water coil a...
  8. Replies
    14
    Views
    892

    Rooftop heating elements

    Hi!
    Would like to seek some help about Trane WSD90 heating element p/n 21-3513-04.
    The problem is that the protective thermostats trip very often and the customer is not happy at all.
    I suppose...
  9. Replies
    8
    Views
    521

    http://www.hvacrinfo.com/cope_ae_bulletins/cope_gr...

    http://www.hvacrinfo.com/cope_ae_bulletins/cope_grnslm.pdf
  10. Thread: Tool bags

    by narkom
    Replies
    96
    Views
    15,743

    Does anybody use hard suitcases like these?...

    Does anybody use hard suitcases like these?
    http://www.gtline.com/toolcases.php?linea=2
  11. Thread: glycol pump

    by narkom
    Replies
    12
    Views
    2,060

    I always use a distiiled water to avoid any...

    I always use a distiiled water to avoid any impurities like a chlorine. But on that site I have ready-to-use mixture.
    Yes I have holding tank.
  12. Thread: glycol pump

    by narkom
    Replies
    12
    Views
    2,060

    Thanks for advice! Very helpful.

    Thanks for advice! Very helpful.
  13. Thread: glycol pump

    by narkom
    Replies
    12
    Views
    2,060

    It is a new system and I am filling the system...

    It is a new system and I am filling the system with the 40% water-glycol mixture. Sorry for not being clear enough.
    The points are:
    -the pump must be able to suck from the drum
    -the water-glycol...
  14. Thread: glycol pump

    by narkom
    Replies
    12
    Views
    2,060

    glycol pump

    Hello!
    I need to fill an HVAC system (air handlers and fancoil units) with the propylene glycol. The system total volume is about 9000 Litres (2377.55 Gallons).
    The glycol package is a 55 Gallon...
  15. Replies
    6
    Views
    879

    Look http://www.dallashermetic.com/techinfo.html

    Look
    http://www.dallashermetic.com/techinfo.html
  16. Replies
    3
    Views
    1,053

    Is this what you need

    Is this what you need
  17. Thread: PU24EK3 LED7

    by narkom
    Replies
    2
    Views
    990

    LED7 should not be on for cooling only models. I...

    LED7 should not be on for cooling only models. I gues you mean puh24ek3. It is normal. It is mean that the bypass valve is on during 3 minutes after the compressor stops....
  18. Replies
    17
    Views
    3,200

    It is a variation. To be exact, the filter drier...

    It is a variation. To be exact, the filter drier is right upstream the TXV. It is like this
  19. Replies
    17
    Views
    3,200

    Sorry for not being clear enough. I attache the...

    Sorry for not being clear enough. I attache the refrigeration diagram as I could understand it.
    So in cooling mode there is a temperature drop across the check valve in about 3K. May it be the...
  20. Replies
    6
    Views
    1,118

    You should just punch in the number.

    You should just punch in the number.
  21. Replies
    17
    Views
    3,200

    And there is a TXV for heating mode with a check...

    And there is a TXV for heating mode with a check valve in bypass line for cooling mode.
    Now there is an evaporator freezing in cooling mode. Suction pressure is 2.3 bar (R407C), air filters are...
  22. Replies
    6
    Views
    1,118

    Press "program-7396-enter" and correct settings.

    Press "program-7396-enter" and correct settings.
  23. Replies
    17
    Views
    3,200

    There is a wiring diagram on the door. The unit...

    There is a wiring diagram on the door. The unit has no TXV or capillary tube so I cant understand how it works.
  24. Replies
    17
    Views
    3,200

    Trane rooftop unit

    Hello!
    I badly need a refrigeration diagram of the Trane Voyager I rooftop unit. The model is TSD90. Can anybody help me?
    Thanks!
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