Search:

Type: Posts; User: pbcd

Page 1 of 3 1 2 3

Search: Search took 0.01 seconds.

  1. Replies
    8
    Views
    1,137

    Thanks for your responses. Looking in the Config...

    Thanks for your responses. Looking in the Config and Service screens there is only one deadband setting for water/brine. It is set to 1 degree. My oil pressure is approx. 80 psid, which is the...
  2. Replies
    8
    Views
    1,137

    Freonrick, I'll check the dead bands. If the...

    Freonrick,
    I'll check the dead bands. If the slide valve is leaking, could it still make the 45 degrees when I drop the set point? I never worked with the slide valve, how would I go about...
  3. Replies
    8
    Views
    1,137

    Unfortunately no....

    Unfortunately no....
  4. Replies
    8
    Views
    1,137

    Carrier 23XL Problem

    I have a Carrier 23XL4343ED40 screw chiller. The chill water supply set point is 45 degrees. Recently the chiller has been supplying 48 to 49 degrees. The evap. press./temp is also higher. If the...
  5. Thread: Fan speed signal

    by pbcd
    Replies
    2
    Views
    464

    I'm inquiring as to what type of electrical...

    I'm inquiring as to what type of electrical signal is being used for "fan speed changes and cooling"?
  6. Thread: Fan speed signal

    by pbcd
    Replies
    2
    Views
    464

    Fan speed signal

    I have a Carrier 33MC-URC Room Controller with a 40KMC fan coil unit. The controller has the Power (P), Ground (G) and Signal (C) connections. Question: What type of electrical signal is being...
  7. Replies
    19
    Views
    1,414

    Thanks for the response. The caps are for the...

    Thanks for the response.

    The caps are for the run windings.
  8. Replies
    19
    Views
    1,414

    370 volt capacitor

    Why does some motor manufacturers specify (on their nameplate data) using a 370 volt capacitor on their 460 volt single phase motors?
  9. Thread: Oil heaters

    by pbcd
    Replies
    10
    Views
    1,066

    I don't have the model numbers on hand, but it's...

    I don't have the model numbers on hand, but it's really not relevant.
  10. Thread: Oil heaters

    by pbcd
    Replies
    10
    Views
    1,066

    Oil heaters

    Why are the Carrier (don't know about other manufacturers) screw chillers not designed with oil heaters? Just curious.
  11. Would the VFD output voltage reading taken across...

    Would the VFD output voltage reading taken across the phases be accurate with a VOM?
  12. Thank you for your response .................. ...

    Thank you for your response .................. very interesting.
  13. Puzzling electrical readings taken at VFD bypass contactors

    I have a question concerning an electrical test reading taken at the VFD bypass contactors. This VFD provides power to a 15 HP motor for an air handler unit. To check resistance across my contacts...
  14. Thread: tattle tales

    by pbcd
    Replies
    11
    Views
    5,639

    The lock out relay senses the fault and opens the...

    The lock out relay senses the fault and opens the circuit faster than the reaction time of the tattle tale. Once the circuit is open the tester is useless. You may want to temporarily bypass the...
  15. Replies
    7
    Views
    3,275

    Yes, it is a pull thru design. Thanks for...

    Yes, it is a pull thru design.

    Thanks for all your comments.
  16. Replies
    7
    Views
    3,275

    Thanks guys! I'll try to get back to that job...

    Thanks guys!

    I'll try to get back to that job soon and check it out.
  17. Replies
    7
    Views
    3,275

    Air handler vibration / pulsation

    I have a large McQuay air handler (LSL141DH) that vibrates / pulsates when the VFD ramps up (>50 Hz). If I open the door at the blower side (downstream of the coil) the vibration / pulsation stops. ...
  18. Replies
    0
    Views
    507

    Motor frame number

    After researching the Internet and looking at our spare motors on hand, it looks like the motor frame sizes does not always reflect if the motor has a rigid mounting base. I read that the "H" suffix...
  19. Replies
    4
    Views
    664

    Thanks absrbrtek. I'll check out the online...

    Thanks absrbrtek. I'll check out the online ordering. Hope they also deal with the Federal government. I'll check it out.
  20. Replies
    4
    Views
    664

    Thanks for the reply. I previously spent a...

    Thanks for the reply. I previously spent a couple of hours browsing the Internet and making numerous phone calls. I could not find anyone that would provide York chiller parts to Hawaii. I would...
  21. Replies
    4
    Views
    664

    Looking for a York Vendor

    I am looking for a vendor that I can use to purchase York chiller replacement parts. I am very dissatisfied with the service from our local York office here in Hawaii.

    Thanks
  22. Replies
    0
    Views
    564

    Does anyone know what would be the average...

    Does anyone know what would be the average "motor" temp range when using properly sized space heaters?
  23. Replies
    6
    Views
    948

    x-wrenchturner The SST doesn't utilize a...

    x-wrenchturner
    The SST doesn't utilize a compression fitting. Thanks anyway.



    jrbenny
    The SST thermistors on several units already have slight bends on them. I guess I will try to...
  24. Replies
    6
    Views
    948

    Has any one encountered problems with the Carrier...

    Has any one encountered problems with the Carrier flotronic chiller saturation suction thermistor slowly pushing out. If so, any remedies? Thanks!
  25. Replies
    9
    Views
    815

    Thanks guys you have been very helpful.

    Thanks guys you have been very helpful.
  26. Replies
    10
    Views
    1,042

    freonrick Haven't tried out the config changes...

    freonrick

    Haven't tried out the config changes yet, but thanks for the help and the explaination.
  27. Replies
    10
    Views
    1,042

    I have other units that have a multipler of 2 and...

    I have other units that have a multipler of 2 and the ramp loading is disabled, but these units does not have this problem. I'll try changing the settings and see the effect anyway. Can you explain...
  28. Replies
    10
    Views
    1,042

    The deadband multiplier is 2.0. Ramp Load Select...

    The deadband multiplier is 2.0.
    Ramp Load Select is disable.
  29. Replies
    10
    Views
    1,042

    I have two chillers for two different buildings...

    I have two chillers for two different buildings that do not maintain the chill water set point. One chiller is 40 ton and the other is 80 ton. They both have the comfortlink controls. Prior to...
  30. Replies
    10
    Views
    1,042

    I have two 30GTR Carrier chillers that run about...

    I have two 30GTR Carrier chillers that run about 3 to 4 degrees below the set point. With the set point at 45 degrees and the supply chill water at 41 degrees, the chiller is running at 100%. The...
  31. Replies
    9
    Views
    815

    HVAC3901 You have been very helpful. Thank you...

    HVAC3901
    You have been very helpful. Thank you for taking the time to explain things.
  32. Replies
    9
    Views
    815

    HVAC3901, thanks for your reply. I probably got...

    HVAC3901, thanks for your reply. I probably got this wrong, so please correct my train of thought.

    My chillers are being controlled by a DDC command. When the chiller is configured to BEST, the...
  33. Replies
    9
    Views
    815

    I have a 19XR Carrier centrifugal chiller. Can...

    I have a 19XR Carrier centrifugal chiller. Can someone explain the SUPVSR/BEST command override for the Start/Stop? Also, why when I "Release" SUPVSR nothing initially appears next to the command...
  34. Replies
    1
    Views
    558

    I have a 19XR Carrier centrifugal chiller. Can...

    I have a 19XR Carrier centrifugal chiller. Can someone explain the SUPVSR/BEST command override for the Start/Stop? Also, why when I "Release" SUPVSR nothing initially appears next to the command...
  35. Replies
    16
    Views
    2,153

    Thanks guys, it all make sense. From what I...

    Thanks guys, it all make sense.
    From what I recall it is a 339 HP, 480/240V motor.
  36. Replies
    16
    Views
    2,153

    I do know that the motors on both chillers are...

    I do know that the motors on both chillers are the same. There are no motor terminals. The 12 leads run directly into the motor. I have verified 6 windings using the VOM.

    T4 to T1
    T4 to T1
    T5...
  37. Replies
    16
    Views
    2,153

    Tom R I checked the motor this morning. It is...

    Tom R
    I checked the motor this morning. It is 480V. I checked the lead wire markers and from what I recall, they are as follows:
    L1 - T1,T1,T6,T6
    L2 - T2,T2,T4,T4
    L3 - T3,T3,T5,T5
    I guess I'm...
  38. Replies
    16
    Views
    2,153

    cold-n-mode: Yes, 4 leads connect to each phase...

    cold-n-mode:
    Yes, 4 leads connect to each phase of the SS starter.

    Tom R:
    The leads are disconnected from the SS starter. I need to double check the motor voltage.
    Thanks for the explanation,...
  39. Replies
    16
    Views
    2,153

    I haven't seen the motor terminals yet. I...

    I haven't seen the motor terminals yet. I believe it is a dual voltage, Y Start: Delta Run motor, with the soft start connected directly to the Delta Run connections. Therefore, I think it may have...
  40. Replies
    16
    Views
    2,153

    Actually what I have is a 12 lead (open) motor. ...

    Actually what I have is a 12 lead (open) motor.

    Thanks guys I appreciate your help. Happy New Years!
  41. Replies
    16
    Views
    2,153

    I'm megging a York centrifugal 480V motor. I...

    I'm megging a York centrifugal 480V motor. I have uploaded two pages from the O&M. Could someone explain the "A" and the "C" curves on the temp. & insul. graph? Thank you.
    ...
  42. Thread: Uploading pics

    by pbcd
    Replies
    3
    Views
    700

    Thank you. Happy New Years!

    Thank you.
    Happy New Years!
  43. Thread: Uploading pics

    by pbcd
    Replies
    3
    Views
    700

    I'm trying to upload some pics for the first...

    I'm trying to upload some pics for the first time. When I preview the post the pics are very large. I am using ImageWiz and the Boss's instructions. Thanks for any help.
  44. Thread: exp tank

    by pbcd
    Replies
    12
    Views
    1,211

    Wouldn't the feed water regulator setting be base...

    Wouldn't the feed water regulator setting be base upon the same calculation as the expansion tank?
  45. Replies
    5
    Views
    881

    Thanks guys, I decided to take readings before...

    Thanks guys, I decided to take readings before removal (out of curiosity) and following installation.
  46. Replies
    5
    Views
    881

    rscamaro: It's a open drive. hw chiller man: ...

    rscamaro: It's a open drive.

    hw chiller man: Thanks for the info.
  47. Replies
    5
    Views
    881

    I'll be replacing a motor on a York centrifugal...

    I'll be replacing a motor on a York centrifugal (model YTD3D3C3-CNF). The motor rebuiler and a York rep. both said that no alignment is perform on this unit since the motor is front mounted to the...
  48. Replies
    22
    Views
    1,849

    Thanks r718 I didnít know there was more info....

    Thanks r718
    I didnít know there was more info. under Input Service Configurations. My Instructions is a little newer. Itís interesting that the earlier instructions says if surge preventive occurs...
  49. Replies
    22
    Views
    1,849

    Double checked control panels on both units and...

    Double checked control panels on both units and found no stickers for the load points. I donít know if the current load points are from the factory or the local Carrier rep. that starter the units....
  50. Replies
    22
    Views
    1,849

    Glad to have you guys helping out. I'm learning...

    Glad to have you guys helping out. I'm learning a lot. Will be back to work tomorrow and will check out the log to see what the average delta T has been across the evap. Also will plot some...
Results 1 to 50 of 112
Page 1 of 3 1 2 3
Comfortech Show Promo Image

Related Forums

Plumbing Talks | Contractor Magazine
Forums | Electrical Construction & Maintenance (EC&M) Magazine
Comfortech365 Virtual Event