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  1. i watched it once and it pumped down to 25 psi...

    i watched it once and it pumped down to 25 psi and shut off. what should i be looking for?
  2. I talked to tech support and they said that was...

    I talked to tech support and they said that was normal.
  3. The suction pressure during a pumpdown dropped...

    The suction pressure during a pumpdown dropped down to 25 psi then shutdown
  4. The crankcase heaters are all working. I did...

    The crankcase heaters are all working. I did notice foaming in the sightglass when the A2 compressor started.
  5. I did not check the suction pressure while...

    I did not check the suction pressure while pumping down. How low should it pump down?
  6. wouldnt it be tripping on flow if this was the...

    wouldnt it be tripping on flow if this was the issue? How would you check it?
  7. EXV. I did not notice ant foaming in the...

    EXV. I did not notice ant foaming in the sightglass. I will check the crankcase heater.
  8. Carrier air cooled chiller help mode l30GT-110---610KA

    Been having trouble with intermittent trips of alarm #61 which is low oil pressure circuit A. Checked refrigerant charge- subcooling 10-15 degrees superheat 4. The oil level is good, net oil...
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    york yk centrifugal question

    Im working on a york yk centrifugal water cooled machine 500 tons. I have read that 20 to 25 degrees discharge superheat is a good rule of thumb. After fixing a few leaks on the chiller and...
  10. So i can pump it in at the shrader on top of the...

    So i can pump it in at the shrader on top of the oil pump? Compressor on or off??
  11. I talked to another tech at the shop and he also...

    I talked to another tech at the shop and he also said to add it though the suction service port. If i pump it in slow is there any real harm that can be caused?
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    about 75000btu 2000 sq ft house

    about 75000btu 2000 sq ft house
  13. Replies
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    533

    infloor radiant heat

    Im looking for information on sizing the pex tubing and the spacing of the tubing when installing. If anyone has info or charts i would appriciate it. thank you.
  14. I do not know of any recent leaks. There are 4...

    I do not know of any recent leaks. There are 4 compressor, 2 on each chiller and all read low. The chiller is about 20 years old and every year has had oil samples taken. Im guessing this is where...
  15. where do i add oil to a copeland recip on a mcquay chiller

    The model number of the chiller is WHR090D-W. The serial number is55B8189300. The model number of the compressor is 8DP1-5000-FSD-242. In the manual it says that the compressor should show an oil...
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    would you suggest reverse return piping?

    would you suggest reverse return piping?
  17. Replies
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    960

    I'm open to suggestions. 99% of the time i do...

    I'm open to suggestions. 99% of the time i do service calls and do very little install.
  18. Replies
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    960

    so do you suggest reverse return piping?

    so do you suggest reverse return piping?
  19. Replies
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    960

    I was planning on having 2 zones. 1st zone for...

    I was planning on having 2 zones. 1st zone for the 2 bedrooms and master bath, second for the rest of the house that has a mostly open floor plan. The house is a single story ranch . I was going...
  20. Replies
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    960

    I wont have any problem piping the system,...

    I wont have any problem piping the system, choosing a boiler, controls ect. Sizing the element for each room i could use a little help. Do you know of any free software i could use? thanks
  21. Replies
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    960

    hydronic baseboard sizing

    I'm looking for information on sizing hydronic baseboard heat for a house. The house is in new york and is well insulated.

    How many btu per square foot should i be shooting for?

    For 3/4...
  22. Replies
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    720

    the delta across the heat exchanger was 12 from...

    the delta across the heat exchanger was 12 from inlet to outlet.. so you think its just low water flow? the 30 subcooling seemed like a red flag to me
  23. Replies
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    there is no strainer, the balancing valves are...

    there is no strainer, the balancing valves are wide open, and the heat exchanger has been flushed and i ran rydlime through it for an hour. i was taught to take the temp of the water and add 30 and...
  24. Replies
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    2 ton trane heat pump

    2 ton trane heat pump thats not getting a good delta t across the evaporator(13-15 degrees). Checked the superheat (12) and subcooling (30). Im thinking a possible restriction due to the high...
  25. Replies
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    i did drop them into the bin to clean them. i...

    i did drop them into the bin to clean them. i used a clean rag with a allen key to wipe them off.
  26. Replies
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    scottsman ice machine problem

    scottsman ice machine
    model # cme656ae-32a
    S# 121666-12b

    The controller reads full bin when there isn't a full bin. I cleaned the sensors and the unit would run for a few hours then reads full...
  27. Using A/C easy seal by nucalgon on a cap tube system

    I have a small prep table that has a leak that i cannot find. I have heard mixed feelings on using the a/c easy seal by nucalgon. Has anyone used this much? Had any problems afterwards? The system...
  28. pilot problems with and older gordon piatt burner

    we have been having problems with flame failure on an older gordon piatt burner for a boiler. there was a guy from my company there the other day that had adjusted the pilot pressure and air. i got...
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    hey appreciate the info. lol

    hey appreciate the info. lol
  30. Replies
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    963

    reznor direct fire make up air unit

    reznor
    m#RDF1-65

    I got this old make up air unit from 1986 that is having problems staying lit. I only had a few minutes to check it out today and have to return in the morning. no wiring...
  31. Replies
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    315

    dayton wall unit question

    I got a troubleshooting problem im a bit unsure about. The unit will call for heat. The pilot will light and when it goes to light the main burner the gas valve starts clicking and making noise...
  32. Replies
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    figured it would be cheaper. how much does the...

    figured it would be cheaper. how much does the bosch run? i did find out that if you use a pump with the instant hot water heaters it voids the warranty... so thats out of the question
  33. Replies
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    595

    infloor radiant heat questions

    Can a instant hot water tank be used for infloor radiant heat?

    If so what brands and models do you suggest

    I havent done much infloor radiant heat so any suggestions would be appreciated.
  34. Replies
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    done. thank you

    done. thank you
  35. Replies
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    do you have a link for this design software?

    do you have a link for this design software?
  36. Replies
    7
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    473

    infloor radiant heat question

    Im looking for some information on installing infloor radiant heat into floors joist spaces. Sizing of the lines, maximum lengths of runs... info like that. I havent ever installed just work on it...
  37. Replies
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    hydronic heating question

    Im going to be installing an outdoor wood boiler in a friends house for heat but he doesnt want to have baseboard heat. So i suggested infloor radiant heat. For backup he still wants a forced air...
  38. Replies
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    i have also ohmed out the windings of the...

    i have also ohmed out the windings of the compressor. I got 1.3 between each.
  39. Replies
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    sorry should of given you guys some more info....

    sorry should of given you guys some more info. This is a data aire heat pump unit ( water cooled). Voltages and amp draws after replacing the fuses look good. Then after a day or so of running the...
  40. Replies
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    problem with blowing fuses

    I have a problem with this unit blowing fuses. The fuses are in the compressor curcuit. The only two loads in the curcuit are the compressor and the crank case heater. The cch is wired off the...
  41. anyone have a troubleshooting manual for honeywell economizers??

    could use it for tomorrow if anyone does thanks
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    i guess im not sure how to message him lol

    i guess im not sure how to message him lol
  43. Replies
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    it was wired the same as the other one and none...

    it was wired the same as the other one and none of the wiring was damaged.
  44. Replies
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    the module in separate from the motor

    the module in separate from the motor
  45. Replies
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    they seemed to work fine on the other rtu. then...

    they seemed to work fine on the other rtu. then when i put them in the rtu that was running in free cooling the unit continued to run in free cooling. Thats why i was confused... i didnt think there...
  46. Replies
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    i swapped both parts from another rtu and had no...

    i swapped both parts from another rtu and had no luck
  47. Replies
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    yes they did

    yes they did
  48. Replies
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    carrier RTU aboiut 10 years old

    When i got on site the rtu was in free cooling mode. There was another identical unit near by. So i first swapped the enthalpy sensor... still ran in free cooling. Then i swapped the honeywell...
  49. Replies
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    tripping on oil pressure

    I got a split system with a trane semi hermetic compressor. The model of the compressor is M# 2F5A58. When i got on site the compressor was tripped on oil pressure. Then I reset the switch and...
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    domestic hot water problem

    I have a domestic hot water system with a recirculation line that is spiking in temperature. There is also a mixing valve that controls the water temp to the space. The one thing i noticed is that...
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