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Type: Posts; User: firstmech

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  1. Thread: Deli case

    by firstmech
    Replies
    4
    Views
    693

    should of been does he have his meat wrapped.

    should of been does he have his meat wrapped.
  2. Thread: Deli case

    by firstmech
    Replies
    4
    Views
    693

    rule of thumb, the evap should be 10 to 15 degees...

    rule of thumb, the evap should be 10 to 15 degees below the case temp. not much you can do about the humidity, the refrigeration is going to take the moisture out of the air. does he have his meat....
  3. Replies
    1
    Views
    649

    Yes this is comonplace. There is many...

    Yes this is comonplace. There is many manufactures of CO monitoring systems Armstong is one of the more popular

    http://armstrongmonitoring.com/

    Most systems use a sensor or multiple sensors...
  4. Where microprocessors are not used we typically...

    Where microprocessors are not used we typically find basic elecctromechanial circuits and relays with intergrated safety lockout circuits requring manual reset of the control or main power circuit...
  5. Replies
    19
    Views
    3,007

    Operator, Regarding how to select the proper...

    Operator,
    Regarding how to select the proper fixed sheave generally to get you in the ball park if your system is operating within spec. note the belt type (A, B, 3L, 4L, ect.) this will give you...
  6. Yes and No, It all depends on the manufacture and...

    Yes and No, It all depends on the manufacture and the model. Microprocessor are more commonplace in the last few years especially on the higher end models. As for equipment price wars you will still...
  7. Replies
    19
    Views
    3,007

    I agree with rubobornot, our policy is to replace...

    I agree with rubobornot, our policy is to replace all adjustables with fixed. If you are into prevenatative maintenance agreements the new fixed sheaves will save you $$. Not to mention trying to...
  8. Replies
    49
    Views
    3,320

    I agree with absrbrtek, stay with water cooled I...

    I agree with absrbrtek, stay with water cooled I am assuming your system has a cooling tower, therfore the most economical means of heat transfer is a water cooled condenser. we have used...
  9. Replies
    7
    Views
    1,410

    Hi welcome, simply do a search on this forum,...

    Hi welcome, simply do a search on this forum, both these topics are very popular and there has been multiple threads on both with good, accurate detail.
  10. Replies
    8
    Views
    2,206

    I would definitely use a seperate time initiated...

    I would definitely use a seperate time initiated time termanated defrost clock, especially if you are running your box below 40 deg. (It will pay for itself if it reduces the need for 1 manual...
  11. Replies
    8
    Views
    883

    I am just recovering from major back surgery...

    I am just recovering from major back surgery spinal thoracic fusion (4 vertebrae removed and titanium cylinder inserted and attached with screws to my remaining vertebrae) this was all due to blowout...
  12. Been there also, I agree with the others as most...

    Been there also, I agree with the others as most probably caused by bacteria and condensate. We have cleaned the evaps and then followed up with a biocide rinse of the coil. This seems to have...
  13. Replies
    8
    Views
    2,206

    Yes there is a anti short cycle delay option (ASD...

    Yes there is a anti short cycle delay option (ASD in the menu) the delay is adjustable from 0 to 12 minutes. The delay begins when the unit is first powered up and then after an "on" cycle ends.
    ...
  14. Replies
    19
    Views
    1,448

    As you mentioned the compressor was replaced I...

    As you mentioned the compressor was replaced I think you should begin there. An incorrect undersized compressor would provide the conditions you stated. If that checks out you are back to refrigerant...
  15. Thread: R-500

    by firstmech
    Replies
    5
    Views
    726

    Sorry, I missfired should be 401 "b" nor "a" as...

    Sorry, I missfired should be 401 "b" nor "a" as icemeister pointed out.
  16. Thread: R-500

    by firstmech
    Replies
    5
    Views
    726

    The recommended replacemet as far as internm...

    The recommended replacemet as far as internm goes, would likely be MP66 (R-401a) depending upon your application you may not have to change the oil and if you do 1 compresor oil change to alkabenzene...
  17. Replies
    3
    Views
    765

    You did not state the subbase model or if the...

    You did not state the subbase model or if the second stage heat relay of the unit is actually being energized.
    Most Honeywell T300 series stats indicate power on the switched terminals (They call...
  18. Replies
    15
    Views
    1,552

    Val, regarding rates I can't comment on central...

    Val, regarding rates I can't comment on central or western Canada but here in the Atlantic provinces HVAC charge out rates for most National contractors range from $60 to $85 per hour on average....
  19. Replies
    15
    Views
    1,552

    Just wondering how the rates compare in the US...

    Just wondering how the rates compare in the US for Refrigeration compared to Air Conditioning (don't post actual rates).Up here in Canada Refrigeration has always been around the $10.00 or less per...
  20. Thread: tutco vav

    by firstmech
    Replies
    9
    Views
    1,882

    I am not sure about Tutco elecrtic heaters but...

    I am not sure about Tutco elecrtic heaters but most others have air pressure diffential controls that are wired in series with the heater control circuit.
    Therfore disabling the heater in a low...
  21. Replies
    8
    Views
    807

    I think as the other members have mentioned most...

    I think as the other members have mentioned most suppliers have some margin of error incorporated into thier load calculations and equipment selections.
    Equipment capacities rarely exactly match...
  22. Hi ColdT, We have been using the Johnson...

    Hi ColdT,

    We have been using the Johnson Control MR series, the MR4 would fit the application you are decribing, Pretty much the same control as the Sporlan (as posted by icemeister).

    One...
  23. Replies
    10
    Views
    1,274

    One more thing you may want to check with the...

    One more thing you may want to check with the evaporator that is causing the ice build up problem is the condensate drain:
    - Makes sure it is not restricted.
    - Ensure it is trapped (outside the...
  24. Replies
    8
    Views
    744

    Not sure if this would be any help, but we had a...

    Not sure if this would be any help, but we had a similar problem estimatimg the water volume in a large building complex that sharred a common hot water heating loop.

    As the water quanity...
  25. Replies
    12
    Views
    1,928

    The bottom line is if the dehydration procedure...

    The bottom line is if the dehydration procedure is not performed completly and additional means of cleanup is not performed after the start up your customer is in for costly learning expierence.

    ...
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