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  1. Afternoon, guys....Having the same issue with my...

    Afternoon, guys....Having the same issue with my new laptop, can someone forward me that patch again for the i-Vu software? (Tried to send MechMike2 a PM, but his PMs are turned off or something)
    ...
  2. Should be manifold, but the supply pressure spec...

    Should be manifold, but the supply pressure spec will also be elevated. The only other device on this gas line is a generator which required HTN pressure, so they are looking for a HTN rated tankless...
  3. HTN Natural Gas pressure boiler/water heater

    Looking to find a tankless water heater (Commercial or residential) and boiler (around 300-400k btu) that run on Natural gas pressures in the 8-14" w.c. range.

    Most I find are 3.5-8" w.c.

    ...
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    WSHP tower in the North East winter

    Just inherited a building with about a 200 ton WSHP tower - About 65 heat pumps in the building.

    There are boilers to 'reheat' the condenser water, but not sure if we need to winterize the tower...
  5. Thanks again Mike...Everything worked perfect...

    Thanks again Mike...Everything worked perfect after I updated the Field Assistant.


    My next question -

    I have three rooftop units feeding ~6 VAVs each. I can tie them all together to...
  6. Cool....Thx! I will give it a shot!

    Cool....Thx! I will give it a shot!
  7. Can't connect to Carrier BacNet decives with i-Vu

    Doing a startup on some VAVs this week, and having trouble with the i-Vu software that came with the VAVs.

    I installed everything, and am connecting through the USB dongle.

    When I try and...
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    Thanks, Kontrol!! I think you're...

    Thanks, Kontrol!!




    I think you're reffering to the Carrier 3v 'VVT', not the BacNet I-vu VAV.

    I hated that 3V with the 'linkage coordinator' nonsense. Trane's VariTrac system is sooo...
  9. Replies
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    Should be doing startup soon....Where can I get...

    Should be doing startup soon....Where can I get the 'SpongeBobs'??

    Also - McGreevy - Are you saying the daisy-chain has to go in the order of the VAV #'s?

    The longest string only has 8...
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    1,893

    I see....I will advise and see if they'll do a...

    I see....I will advise and see if they'll do a change order. Thanks! Certainly easier to run it now with everything open...
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    Ascj - I believe their thought was to have each...

    Ascj - I believe their thought was to have each trunk of VAVs communicate directly to the rooftop that is supplying air to them.

    They are not 'that' close to each other either, and there is no...
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    Thanks for all the help, Wolf, Dallas, and...

    Thanks for all the help, Wolf, Dallas, and Tleyden.

    Yeah, it's coming along, waiting on sparky to get us some power so we can program them.

    It won't really be on an open network yet. But we...
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    Carrier I-Vu BacNet VAV

    We are doing a project with the newer Carreir VAV system 'I-Vu' with BacNet.

    On the VAVs there are two dials (as pictured), just wondering if these are for setting up the address.

    ...
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    2,146

    Ok. Got it...That should be easy enough....Big...

    Ok. Got it...That should be easy enough....Big thanks!

    After looking at electrical diagrams online for the past hour I look like this --> :gah:
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    Can I average two thermistors together?

    I have a customer that is currently using a return air sensor (thermistor) to control a rooftop unit.

    They want to add a thermistor to one room, but also use the return air sensor and 'average'...
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    Suction pressures. I would imagine that we would...

    Suction pressures. I would imagine that we would see an increase in suction pressures/temperature if the valves were shot. How else would it melt that 176 deg F plug on the suction line?
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    But we'd see some indication of that by the...

    But we'd see some indication of that by the pressures, no?
  18. Thread: Mcquay RPS

    by turbo50mike
    Replies
    4
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    593

    Most of the current RPS' pump themselves down at...

    Most of the current RPS' pump themselves down at the end of the cooling cycle.

    You're on the right track. Let the unit pump down, and then close the service valve near the filter. You'll still...
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    The unit is not old at all (maybe 5 years)...And...

    The unit is not old at all (maybe 5 years)...And these reliefs were not on the compressor, but about 2 feet away on the suction piping. Carrier says the suction one melts at 176 deg F, liquid at 210...
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    Suction meltaway relief valve open

    Got a service call on a Carrier condenser that wasn't working. Found the suction meltaway relief valve open, and the entire charge gone.

    Condenser fans seem to be working, and everything else...
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    Two things...Does it have an Economizer? If...

    Two things...Does it have an Economizer?

    If so, turn off power, unplug Econo at the board, restore power; See if that changes anything.

    If that doesn't help; just hang the sensor with a new...
  22. Thread: Boom.

    by turbo50mike
    Replies
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    535

    Boom.

    This probably made some noise...


    Air cooled 06e, R22.
  23. Replies
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    It's a single compressor condensing unit for a...

    It's a single compressor condensing unit for a single air handler.

    My tech found a few other surprises...He was changing the suction filter, and found out someone had already taken it out, and...
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    One unloader or two?

    Looking at a 25 ton replacement compressor - New compressor comes with a spot for one unloader. Existing compressor (which is a replacement, also) has two unloaders (pictured).

    Carrier tech says...
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    I think I worked on a Carrier 25 ton earlier this...

    I think I worked on a Carrier 25 ton earlier this week...Does it look like this or have similar unloaders?
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