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  1. Discharge vapor pressure vs. outlet condenser pressure

    If you measure the discharge vapor pressure on the compressor and then measure the outlet liquid pressure on the condenser the pressure should be the same but the temp should drop right
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    I want to thank YORK 56 for the info about the...

    I want to thank YORK 56 for the info about the motorized feed/drain valves that had a recall on them. They are going to replace them for free, I got Johnson Control to come out to take a look at the...
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    1,948

    The unit about 5 years old never had a...

    The unit about 5 years old never had a refrigerant leak I was concerned about the flash tank level it was low 20% and I know they should be running about 35% the drain valve to the evap was open to...
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    1,948

    Noboby has added or changed the oil in 8 months...

    Noboby has added or changed the oil in 8 months so I don't think this could be the problem but thank for the response
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    Air cooled unit with 8 fans they were running...

    Air cooled unit with 8 fans they were running about 75% loaded with both compressors where running. The sensors seem to be acuate I put my gauges on reading the same pressure as the display and temp....
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    1,948

    York Chiller YCAV0247

    I need some help I have a York chiller 200 ton that cools glycol Refrigerant R134a Two screw compressors Here's my problem I get call out at 3:34 am the curcuit 1 had shut down and the operator...
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    669

    Stand up Victory Freezer

    I have a problem with a Victory Stand up freezer. Unit usually Runs about 10 F when I showed up it was running about 34F This was converted to a R-134a Compressor about 8 years ago Owner has not had...
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    794

    Heat Pump Package unit

    Carrier Heat Pump Package unit The condenser coil on the unit is freezing up the condenser fan is not running the indoor fan running. I jumped out the R to Y to get it into cooling and the condenser...
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    1,688

    This unit is about 8 years old The blower has...

    This unit is about 8 years old The blower has never been replaced. it factory I did check each phase to ground and got 258 V, 263 v AND 262 V I need to check phase to phase Voltage Thanks...
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    1,688

    Its a Package unit the filters are inside a door...

    Its a Package unit the filters are inside a door right at the evap so I removed the filters and left the door open so that I made sure there was no restriction on the return side I don't think...
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    1,688

    Yes its a 3-Phase motor Fla 2.6 460 Volts I let...

    Yes its a 3-Phase motor Fla 2.6 460 Volts I let the evap melt out all night so it was clear
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    1,688

    Three Phase Blower motor

    Trouble shooting a A/C unit the Evap Coil is iced up I checked the evap motor to make sure it running it is but it looks like its running at half speed, The RPM rated at 1725 it looks like its...
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    15
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    1,952

    Slipper seal is leaking by

    Sounds like your slipper seal is leaking by, Manual load compressor to 100% and then put in hold if the percentage of load drops you slipper seal leaks and you need to replace pain in the ass to do...
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    1,135

    Recips

    These are recips 12 cylinders with loaders. System has a 10500 # receiver what could happen if the discharge pressure is to low? as long as you got liquid level in the evap it should be ok right...
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    1,135

    Lowering the discharge pressure

    Is there advantage to lowering the discharge pressure, I work on a 250 ton Twin York compressor, water cooled condenser Discharge runs 175 psig, I have the cooling capacity to get the discharge...
  16. Thread: suction valve

    by 242447
    Replies
    2
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    583

    suction valve

    I'm working on a stand up commercial freezer that has a adjustable manual valve on the suction line that you need a allen wrench to adjust. is this a capacity control valve? This is a R-12 system
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    Traulsen Stand up frezzer problem

    UP front I service tech.residental HVAC units and light commerial I have never worked on any freezers This for a friend so I'm hoping somebody can help me out. system runs with R-12 refrigerant I...
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    711

    2-Stage Temp Controller

    I got a Question about a 2-Stage Johnson controls-Penn Model# A28AA-36 2 SPDT 40/90 F. The Senser bulb is mounted in the return air duct If I set the temp at 65F on the controller. How does this...
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    Propane Heater Timer?

    A friend of my furnance which uses Propane. It looks like they added a timer to the control circuit. I know when you convert from Nature gas to Propane you have to change the orifices But what's the...
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    515

    Suction Line size

    Need help I'm going to replace a bad 5 ton condenser with a 13 SEER Condenser. The suction line size on the old condenser is 7/8 the new condenser is 1 1/8 do I need to replace the line set or can I...
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    1,464

    Traulsen freezer Question

    I usually don't work on commercial freezers but I got one question. On the evap pan there's a heat strip inside the pan to melt the ice. Does this heat strip only work on the defrost cycle or is it...
  22. Thread: Carrier VVT

    by 242447
    Replies
    2
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    1,255

    Carrier VVT

    I service a Medical Bld. that has a VVT system 30 ton Compressor for cooling and a boiler for heating. My question is the unit shut down on a SE 11 ERROR on the Monitor stat I checked the book and...
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    599

    Thanks for the help

    Thanks for the help
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    599

    It controls the cam on a sequence timer. Its a...

    It controls the cam on a sequence timer. Its a needle that floats between two contacts. If the temp is satified the needle stays in between the contact points as the temp rise the needle will move to...
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    599

    Need help Out dated temp. controller

    I service a 40 Ton Vilter R-22 process unit.My problem is the Temp. controller filled bulb went flat. This controls the unloaders from loading and unloading. Its a old out dated PENN Johnson...
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