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Type: Posts; User: dnr

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  1. Replies
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    The motor is an Ebm papst. Found a manual for...

    The motor is an Ebm papst. Found a manual for the motor itself on their sight pretty easily.
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    Thanks for the tip about Giga ohms I used a...

    Thanks for the tip about Giga ohms I used a different meter that has a 2million ohm range, came up about 1.8 between phases. I guess that makes sense since it's not really the windings. The NO to...
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    Sorry for not being clear enough. These are 3...

    Sorry for not being clear enough. These are 3 phase motors with integrated speed controllers. The motor has three high voltage wires plus a ground. And four low voltage control wires.

    A red wire...
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    RTAE Condenser fans

    I am newishly employed at a brewery and we have a dozen Trane chillers. Two are 3phase 180 ton RTAEs. I got the job to change out three fans they decided were dead. Went ahead and swapped one out...
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    Camp175 thanks for the guess. It seems to have...

    Camp175 thanks for the guess. It seems to have been the board. Initial call came in at night. Installed an oem board the next afternoon. Fired right up and no issues. For a week.

    I don't use...
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    Gas valve stuck open.

    I have an old Bryant (394had048100). Someone has installed a icm2804 aftermarket control board, some time ago. About a year per owner. It is giving a fault code of "gas valve stuck open"1 led...
  7. Thread: Old recovery tanjs

    by dnr
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    1,239

    Old recovery tanjs

    I got three old recovery tanks from a school that was going to toss them in the dumpster. One is tagged r 11 and has hardly anything in it. One has most likely about half a tanks worth of R22 and...
  8. Depends how good your gloves are😃

    Depends how good your gloves are😃
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    Also after I had it out. I cut the cap tube on...

    Also after I had it out. I cut the cap tube on the txv bulb. No refrigerant hissed out.
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    I appreciate the responses everyone. To be clear...

    I appreciate the responses everyone. To be clear yes I ran the unit after installing the fan and cleaning the coils and replacing the start cap which was reading a few mfd below spec.

    It ran...
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    The head was warm, but not hot. The bottom of...

    The head was warm, but not hot. The bottom of the comp was near ambient temperature. Amperage was low.

    I am Happy to answer any questions, but, I am no longer there so any new info that needs...
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    Also, it ran for twenty minutes before the ...

    Also, it ran for twenty minutes before the overload tripped.
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    I didn't get them. I hadn't put any gauges on...

    I didn't get them. I hadn't put any gauges on because I knew the fan motor was dead. I don't put gauges on unless I suspect a charge issue. This seemed so clear cut with the dead condenser fan...
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    I know. Like I said I was getting pretty...

    I know. Like I said I was getting pretty panicky. This is an r 22 system, walk in refrigerator, heat craft model ptno99h2b.
    When I kicked it on high pressure remained unchanged at 123. Low...
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    Getting a little panicky

    I got called to a warm walk in last night. Found a locked condenser fan motor, can't turn it by hand, voltage is present.and a compressor not functioning. Got a new fan motor installed this...
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    What I was really asking is how the relationship...

    What I was really asking is how the relationship between total and high heat time is determined. I used the dipswitch to speed up the second stage coming on so I could measure Delta t on high. And...
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    Nerdy 2 stage question

    Does anyone know the basics of the two stage algorithm in furnaces where the thermostat uses single stage and the furnace control board brings on the second. I am asking as a general because I have...
  18. Thread: Williams 3E291

    by dnr
    Replies
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    593

    Williams 3E291

    Looking at an old Williams wall furnace. Direct vent, and "through the wall" as in placed on an interior wall and serves both rooms. On the gas valve side the pilot and thermocouple sit together...
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    At the mating surfaces nothing. I have cleaned...

    At the mating surfaces nothing. I have cleaned the face of a brass union with solvent to before assembly, but that was about scale on a steam system. Anti sieze on threads if you really feeling...
  20. What is the reason for insulation on the liquid...

    What is the reason for insulation on the liquid line below ground. If the copper is buried under 12 inches of dirt what are you still insulating it from. Honest question. I would never bury a line...
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    Boiler/refrigeration bibles

    I have several books about comfort cooling both resi and commercial. But all my Boiler info is based on large commercial boilers which is where I worked for about a decade. I have turned down two...
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    Is the little "u" of pipe just after city water...

    Is the little "u" of pipe just after city water valve for movement, like a Hartford loop, or is it just because the existing valve was lower than you needed by a half inch or something?

    Looks...
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    Thanks everyone. I made a repair to the walk in...

    Thanks everyone. I made a repair to the walk in cooler at end of the day Friday. And chatting with the owner it became clear the G.C. had done nothing to the hvac system during build out. But...
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    Wood fired pizza restaurant

    Any body got any numbers for load calc of a wood burning pizza oven.
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    With all due respect to fire code, nothing I did...

    With all due respect to fire code, nothing I did or didn't do would have changed the number of people they were going to bring in. It was well past that stage by the time I was asked to help.
    ...
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    I enabled them to violate fire code in comfort. ...

    I enabled them to violate fire code in comfort. As opposed to previous years where they were sweaty while violating fire code!
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    Cheap save or hack nonsense

    I got called to a high school that asked me to get the a plan for cooling off the g for graduation. They have three older voyager rooftops in decent condition for that space. The big problem is two...
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