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Type: Posts; User: dave sulz

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    honeywell w7753A2002 control

    Hi everyone. This control is used a lot in the 5 schools I work in. This is a 5 ton RTU. The cooling relay energizes for 5-7 min. then turns off. The space not cooling to 70 set point. Can I test ...
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    I should have taken an amp draw.opened lpc.

    I should have taken an amp draw.opened lpc.
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    compressor not pumping

    Hey now this 40ton aeon has comp. #1 hpc and contactor wire off. The unit is new a year or two old. R410 200 Psi on each gauge comp#1 on brrrr and no press.change . LL same temp.oil in sight glass...
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    614

    Thank you for this responce.

    Thank you for this responce.
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    614

    He Mr me plumber I'm posting my new experiences...

    He Mr me plumber I'm posting my new experiences for me and the newbies. I'm 45 yes old with 25 yes exp. When I see a control a finally get my meter on I learn it . What are your qualification? You...
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    The control on the boiler is a Mc don miller...

    The control on the boiler is a Mc don miller 157s. The schematic is showing a drop in water opens the pump and solenoid. It looks like it will never fill. Also each boiler has a pump. The middle pump...
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    Shipco condensate pump

    This is a shipco mn. Shem 2 steam boilers. The pump controller on each boiler turns on a pump with drop in level.middle pump of 3 backs up either side with more drop opening a solenoid on Esther side...
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    We had a soft solder joint blow out last...

    We had a soft solder joint blow out last summer.we did 2 systems in the attic. The first knight the customer called and said they heard a loud bang. The liquid line blew on a joint in the middle on...
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    I have 25 years of up to 400000btu. I took a...

    I have 25 years of up to 400000btu. I took a black seal class many years ago but unfortunately at the end the wouldn't let me take the test because I didn't work for a place with the boiler...
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    I have used the flush kit numerous times for a...

    I have used the flush kit numerous times for a few years.usually a townhouse where line set can't go outside.follow instructions cover eyes
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    There is an air switch in line with a comp oat...

    There is an air switch in line with a comp oat lockout in hood. With computer forced override small relays pulled in but comp oat and air Sw.are controlling a relay coil to turn on comp contractors. ...
  12. I'm in union cty big roof tops 40 ton 31 ton aeon...

    I'm in union cty big roof tops 40 ton 31 ton aeon metays systems univents airdell
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    Thank you .used aid tool for geothermal equip...

    Thank you .used aid tool for geothermal equip before the metayas system is new to me. I am new to computer controlled stuff. I'm going to get that this spring.
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    Sorry that is an ir scanner

    Sorry that is an ir scanner
  15. draining a large hot water system in the summer.

    It is spring time and there are repairs to be made on some large hot water systems but what if not really necessary. One set of pumps 15hp. The other two 7 HP. I'm new to over 400000 btu...
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    I spoke to fireye tech.this is an is scanner. It...

    I spoke to fireye tech.this is an is scanner. It displays on the screen 0-80. I was confused that I needed to check the s s terminals with my meter. Not with this ir scanner. It is reading 10 and the...
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    power flame burner

    The model is cr3-co-25 an 089050995 what proves the pilot flame? I read a fireye booklet in the boiler room. I saw terminals to check flame.how do I verify pilot and main flame signal.?I'm glad the...
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    aaeon 40 ton rtu

    The unit is controlled w metays system. I over rode 4 stages of compressors. Never came on. Lowered oat lock out to 45. Erv wheels on exhaust wheel on no comp. Fuses good . Raining so boards getting...
  19. I'm now in charge of 2 approx.2 million btu...

    I'm now in charge of 2 approx.2 million btu boilers in a high school . The boiler psi is 27. New feeder.25-75 psi 1 in. Set for 27 psi water 170 deg. The tops are teed together to 4 huge expansion...
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    I was on a ton of Navien installs in the past 5...

    I was on a ton of Navien installs in the past 5 years.we also used the fb38 reducing valve. I went back 5 times out of 30 or do with a 9 lb lock out
  21. Thread: Leak on HP

    by dave sulz
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    I found a leak last summer w/ dye.the ez trap was...

    I found a leak last summer w/ dye.the ez trap was green.I sprays out green if you don't have low loss fittings on hoses.it hits the house easily.I use rags.
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    I have learned a lot about these wacky units from...

    I have learned a lot about these wacky units from this site.thanks to all for sharing info.
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    unit ventilator

    This is a trane mn. vuvc15011e0fac000001210 the blower MTR has a black jumper wire. Also why is black and red both on the same terminal on the relay? What is the transformer doing to the blower...
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    Thanks for the response.my phone won't open the...

    Thanks for the response.my phone won't open the attached. I'll go on my computer tomorrow.
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    a350p johnson controls

    This control is in a steam unit ventilator in a school. What does this control do and how does it work?
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