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  1. if you email me i will send it

    if you email me i will send it
  2. Replies
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    From what I understand the components down to...

    From what I understand the components down to the tiles are selected specially to retain heat
  3. Hi Jay do you have the sequence of operation for...

    Hi Jay do you have the sequence of operation for the staging and control logic of the valves and outputs etc? With actual values of temperatures and pressures? That would be super good resource to...
  4. YVAA is the new RTAA?? haha hope youre well...

    YVAA is the new RTAA?? haha hope youre well :cheers:
  5. lots of posts about this on forum if you do...

    lots of posts about this on forum if you do search , will be clearer. yes It is on a subcooling value I an 90% sure.
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    https://en.wikipedia.org/wiki/Passive_house

    https://en.wikipedia.org/wiki/Passive_house
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    is anyone here familiar with an architecture in...

    is anyone here familiar with an architecture in Europe referred to as Passvhaus where the primary Heating source is referred to as the construction material , then geothermal heatpump and...
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    funny guy :)

    funny guy :)
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    possibly a register offset?

    possibly a register offset?
  10. Neptronic fcu controls integrate bacnet to...

    Neptronic fcu controls integrate bacnet to intesis box web app gateway
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    think these are only Europe based I could be wrong

    think these are only Europe based I could be wrong
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    very simple step controller, put VFD on the fans

    very simple step controller, put VFD on the fans
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    fancoil valve

    Hello I have a question Im wondering someone has seen. a 2 port fan coil valoce with a 4 port body ie looks just like a normal 4 port diverting valve but isnt , just 2 port. stan
  14. are these options substantially more economical??...

    are these options substantially more economical?? better results??
  15. the italians make many self contained solutions...

    the italians make many self contained solutions for w/i cooler that basically hang on the side , downside is compressor noise and ncondesnser air go in this space , perfect for outdoor.
  16. significantly lower cost?

    significantly lower cost?
  17. Replies
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    HOWDENs also noisy beasts, the York YS I can...

    HOWDENs also noisy beasts, the York YS I can bare, you are right probably tons to do with oil separator and pulsations. the DB vertical screws not spent alot around just a couple jobs , seemed ok...
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    hartford screws are noisy beasts :)

    hartford screws are noisy beasts :)
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    I like the idea of static reset on OSA but more...

    I like the idea of static reset on OSA but more in favour of space temps ie all spaces satisfied, such as partly occupied floor etc. i had this discussion with orion also , and he was of opinion...
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    neptronic do a very good budget air pressure...

    neptronic do a very good budget air pressure sensor for about half of above
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    I agree with above but not for simple static...

    I agree with above but not for simple static reset This whole concept of "trim& respond" sounds great on paper , but with all the intensie commissioning and programming required to make it work...
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    WHY DIDNT YOU SCAN THEM?? :) how is dunham bush...

    WHY DIDNT YOU SCAN THEM?? :) how is dunham bush support?
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    I`d recommend old fashioned DP switch that will...

    I`d recommend old fashioned DP switch that will close on lowest speed (cheapest solution) OR an air pressure sensor,(these can be bought in the $100 range nowadays) CT for pump and air status a...
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    Thats great thanks

    Thats great thanks
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    Id appreciate the manual as well , please if you...

    Id appreciate the manual as well , please if you can , thanks
  26. theyre pretty simple , no passwords usually just...

    theyre pretty simple , no passwords usually just need to navigate , had loads in M&S sites call siemens on monday good luck
  27. haah confusing . im doing 10 things , prob...

    haah confusing . im doing 10 things , prob shouldnt be tyoping on here but you said only 1 you trust and 2 the best and cheapest way
  28. I didnt see earlier this was chiller flow related...

    I didnt see earlier this was chiller flow related , Wayne you dont trust better quality differential prssure sensors across chillers to calculate flow?
  29. these systems are primarly intended for two port...

    these systems are primarly intended for two port valves not conventional 3 port. and even further efficiencies gained from pressure independent smart valves. I do projects often where pumps ramp...
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    Hi I was referring to this chinese manuf, just...

    Hi I was referring to this chinese manuf, just as a test tool. Babel Buster seems pretty competitive. I`m partial to Intesisbox because I have amazing support resources with them., but not cheap.
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    They dont do a Low cost Bacnet to modbus gateway?

    They dont do a Low cost Bacnet to modbus gateway?
  32. This idea to me isnt great, what about say worn...

    This idea to me isnt great, what about say worn bearing friction over time, closed fire damper, closed gate valve. Same reason using current switches for status on critical plant is silly. Use and...
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    there certainly is temperature difference there...

    there certainly is temperature difference there in both the condenser as it approaches subcooling (none on this graph) and as the evaporator absorbs superheat as it approaches the compressor, the...
  34. only seen with this with water and dont like it ,...

    only seen with this with water and dont like it , keep it simple i say
  35. .

    .
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    VAV Trim & Respond in GFX/Distech

    I wonder if anyone has this that I could look at and simulate please? My programing is a good level but struggling with this one. thanks!
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    YES I thought this such as some watercooled , ...

    YES I thought this such as some watercooled , I think theres a miscommunication somewhere :)
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    of course theres delta T from inlet condenser to...

    of course theres delta T from inlet condenser to inlet txv ( unless fans are off or pumps haha), its possible theres a failure to communicate what hes trying to say I think
  39. how bigs a piece of string? so many variables ...

    how bigs a piece of string? so many variables starting with Climate location
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    I think I follow you but would you need that with...

    I think I follow you but would you need that with a 100% accurate on the moment weather station?
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    Vaisalla is the best , Innotech offer n open...

    Vaisalla is the best , Innotech offer n open Bacnet interface for their kit, spoken with many different systems happy with the solution
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    Innotech America have a done a few big projects...

    Innotech America have a done a few big projects in this sector :cool:
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    https://www.hvacrschool.com/resources/nitrogen-pre...

    https://www.hvacrschool.com/resources/nitrogen-pressure-calculator/
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    I found a great app for nitrogen pressure rise...

    I found a great app for nitrogen pressure rise calculator in an app HVAC school .com
  45. its from the 60s man :)

    its from the 60s man :)
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    for a simple chiller Carel is the way to go

    for a simple chiller Carel is the way to go
  47. wise words

    wise words
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    thats old stuff , maybe failed processor by now ,...

    thats old stuff , maybe failed processor by now , rip it out and redo controls :)
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    yes their system is primarily designed around...

    yes their system is primarily designed around retrofitting larger watercooled (but not only) for failed non available oem contrls back to an almost perfect factory running condition , very custom...
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    depends how far apart really, for medium temp I...

    depends how far apart really, for medium temp I dont see an issure , for low temp you would need to stage the defrosts I think
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