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  1. Replies
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    Your exactly right, the return is under-sized....

    Your exactly right, the return is under-sized. The whole job was done incorrectly when the house was built just 5 years ago! Example: 4 ton system with 4 zones, on the supply side 1-14" flex duct for...
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    Air Flow Question

    If your total static pressure is .75 at 1600 CFM. would there be any improvement if you lowered the blower to 1400 CFM.? I know the duct work is not adequate for the home and the expense to correct...
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    572

    Well "I" didn't solve the problem but had it done...

    Well "I" didn't solve the problem but had it done by a qualified technician. The return air was too restrictive so another filtered grill was added at the air handler to allow more air in. Then the...
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    Ruud 11 Seer Heat Pump Working!

    After learning more than I could ever imagine here on this forum I can say I am at peace with my inefficient 11 seer heat pump. The air flow problems have been fixed, the coil has been properly...
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    1,571

    My house lights used to dim every time the unit...

    My house lights used to dim every time the unit would come on. All the wiring was checked and a hard start kit was installed, the problem got a little bit better. Had the electric company come out...
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    A question about zones

    In a zoned system which would be more efficient 2 zones combined where your static pressure is lowered and the heat pump is satisfying 1 thermostat or 2 separate zones with a little higher static...
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    1,729

    Yes there is. Right now I'm putting my wife...

    Yes there is. Right now I'm putting my wife through nursing school and also raising 2 children. I will have to wait a little longer before I can enroll. I plan to though because I think there is a...
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    Thanks Beenthere. I've been told that it doesn't...

    Thanks Beenthere. I've been told that it doesn't matter what brand you have a heat pump is a heat pump. I guess with Ruud it does matter.
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    Does this happen because it is fixed orifice and...

    Does this happen because it is fixed orifice and not TXV on the outside condenser? Would it be in my best interest to have the orifice replaced with a TXV?
    If someone could answer these few...
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    I don't want to beat a dead horse here, I...

    I don't want to beat a dead horse here, I appreciate all of your expertise in helping me understand the operation of my heat pump. Just a few last questions. Do all heat pumps with accumulators act...
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    1,729

    Would it help to put heat tape on the...

    Would it help to put heat tape on the accumulator? When this pressure drops the supply temperature drops about 7 degrees at the same time, somewhat inefficient. Do I just live with it or is there...
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    Low Pressure = 20 Suction Temp = -2.5 High...

    Low Pressure = 20 Suction Temp = -2.5 High Pressure = 185.



    This is the lowest it gets before rebounding. If this is normal could someone explain why it does this, what actually is happening....
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    The readings didn't format well for some reason...

    The readings didn't format well for some reason but those pressures and suction temps at start up are normal for Ruud heat pumps ?
  14. Replies
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    1,729

    Would this piston cause the suction line from the...

    Would this piston cause the suction line from the accumulator to frost up? I have been told that it is usually an airflow issue but this has been ruled out by tech when he was here last weekend. He...
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    Could this give a false appearance of low air...

    Could this give a false appearance of low air flow ??
  16. Replies
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    In heating mode I am told that the TXV would be...

    In heating mode I am told that the TXV would be "wide open" so in heating mode I guess it would affect it. The outside condenser only has a flowcheck and that is what I was told metered the...
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    I Have a Question about a Ruud Coil.

    Ruud's evaporator model RCBA has a Flowcheck piston. To convert to a TVX you are supposed to replace the piston with the piston included with the TXV. The TXV was packaged with a .157 piston size...
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    Look what my heat pump has done to me !

    I'm sorry Beenthere. I didn't mean to push the limits on DIY diagnostics. I would never try to replace a TXV. I was only looking for a second opinion before replacing one.
  19. Thread: Testing TXV

    by carlb7
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    821

    Testing TXV

    So the TXV bulb is taken off the line and the cabnet is closed back up with the bulb on the outside dangling. Of course it is another 70 degree mild day. Here are the readings.
    High Pressure=165...
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    Question About TXV

    If you have a condenser that has a Fixed Orifice for metering refrigerant and a TXV at the indoor evaporator coil what type of system do you have? Would a service tech determine that it is a TXV...
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    Fixed Orifice or TXV When Charging.

    Which is the proper way to charge a Heat Pump when the condenser is a fixed orifice but there is a TXV at the evaporator. There is a chart for charging that looks like this.

    46322

    So is the...
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    It was a dirty air filter at the air handler. I...

    It was a dirty air filter at the air handler. I do need a better service company. Seriously thinking of going to school and taking the HVAC course.
  23. Replies
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    Do you mean low air flow at the evaporator coil ?...

    Do you mean low air flow at the evaporator coil ? There are presently two return ducts, 1-17x17 and the other 15x15 feeding into a 20x25 opening at the bottom of the air handler. Pressures were taken...
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    Ruud Achiever Series

    I would appreciate it if you could tell me if all looks normal.

    Outdoor Temp= 73 degrees
    Indoor Wet Bulb= 65 degrees
    High Pressure= 155 psig
    Low Pressure= 55 psig
    Suction Line Temp= 37 degrees...
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    If 20"x25" is the proper size for 1600 cfm. would...

    If 20"x25" is the proper size for 1600 cfm. would the return be short by 210 sq" or in other words would it require an additional 14.5"x14.5" access? If this is not how it would be calculated??
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    I know beenthere would know the answer being the...

    I know beenthere would know the answer being the expert on zoned systems.
    Could you tell me if 17x17 is an adequate size?
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    Propping open the blower door relieves the...

    Propping open the blower door relieves the problem slightly. What should the proper size opening be if the 17"x17" is inadequate for a 4 ton system??
  28. Replies
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    775

    My blower fan is at its lowest speed as well. I...

    My blower fan is at its lowest speed as well. I have 3 returns on 1 plenum. The largest is a 30x20 and the smallest is 16x20. They all feed into the air handler through a 17"x17" hole. Do you think...
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    I think I'm going Zoneless !

    After enduring a harsh winter of bills with my improperly zoned house I feel that my only option is to go zoneless. At the risk of uneven temperatures I feel that I am at the mercy of my situation....
  30. Replies
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    Upon further research the delay can not be used...

    Upon further research the delay can not be used with the ECM blower and my upflow handler. The only adjustments that can be made is with the IFC board. The manual shows dip switches that can be...
  31. Replies
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    I understand and do not want to give you the...

    I understand and do not want to give you the impression that I would do any service work at all on my heat pump. I just had a contractor replace a mismatched coil and I wouldn't dream of harming my...
  32. Replies
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    Ruud shows an optional blower delay, part number...

    Ruud shows an optional blower delay, part number RXMD-C02 for my condenser. Would this help improve the efficiency by keeping bower off until refrigerant is "ready" to heat?
    I can't seem to find...
  33. Replies
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    Thanks Kevin. I check on peoples homes that live...

    Thanks Kevin. I check on peoples homes that live out of state. I have taken temperatures of there heat pump air flows and none of them drop 7 degrees like mine does.In fact not even 1 degree. Is it...
  34. Replies
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    I guess I'm just trying to make the heat pump as...

    I guess I'm just trying to make the heat pump as efficant as possible. The information that Yelram provides seems to explain exactly what is taking place. If i were to add a crankcase heater versus...
  35. Replies
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    Its a GE ECM 2.3 wired to a ifc board. The air...

    Its a GE ECM 2.3 wired to a ifc board. The air flow speeds are hardly if at all detectable to my ears.
  36. Replies
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    Which of these would be most effective if not all...

    Which of these would be most effective if not all 3 ?? Is any of these more cost effective than another? I know 2 out of three that you mention but am not familiar with the "heat trip".
  37. Replies
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    It is in heat mode. Let me give you a example of...

    It is in heat mode. Let me give you a example of what takes place:

    Stat calls
    heat pump starts up
    Upflow air from handler goes to 96 degrees.
    Heat pump is on for about a minute
    Temperature...
  38. Replies
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    [B]Can this explain the temperature drop??[/B]

    Heat pump starts up, vapor from compressor and line-set are fed to the evaporator giving a certain temperature. Refrigerant from accumulator is making its way to evaporator with a "cooler"...
  39. Replies
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    The coil required a txv conversion kit to make it...

    The coil required a txv conversion kit to make it the properly matched coil. When the installer opened up the package there was what I thought called a "piston" that was sized at .157 that was part...
  40. Replies
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    That brings me back to the question about the...

    That brings me back to the question about the temperature drop. Has anyone had experience working with a Ruud achiever series? The temperature drops only at start up, the tech seems to think that...
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    Rattling Piston ??

    My heat pump was overhauled today by the original installer. They replaced the evaporator coil with the correct "matched" coil to outside unit. A new TXV came w/coil and it is the required .157 in...
  42. Thread: Fixed or TXV ??

    by carlb7
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    447

    Outdoor unit calls for RCHA48A1. This is no...

    Outdoor unit calls for RCHA48A1. This is no longer made. Replacement is a RCBA48A1. The "B" stands for fixed piston instead of "H" which is TXV. They have a expansion valve conversion kit for the...
  43. Thread: Fixed or TXV ??

    by carlb7
    Replies
    4
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    447

    Fixed or TXV ??

    If my outdoor unit has a fixed metering device does it make any difference with the inside coil. Coil is about to be replaced due to mis-match. It can come with either metering device but contractor...
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    Thanks. I appreciate all the help that I have...

    Thanks. I appreciate all the help that I have gotten on this forum. It has been tough going. I know I have come across as pest but I was desperate to find the solution. Even the moderators did a...
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    8 feet. I have a question, would it be better...

    8 feet.

    I have a question, would it be better for the heat pump to run longer without heat strips coming on or shorter with heat strips coming on. The time is controlled by the zone board and not...
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    It is outside, there is a deck up above it.

    It is outside, there is a deck up above it.
  47. Replies
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    Here is the update. Tech was here took...

    Here is the update.

    Tech was here took readings and asked if I was sure I wanted him to open up the system?? He thought the pressures looked good. I said lets open it up anyway. He opened it up...
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    Air flow is now good! I have a zoneless zoned...

    Air flow is now good! I have a zoneless zoned system. All 7 - 10" ducts are wide open running on one thermostat thanks to the "ZoneAlone" feature from Honeywell. Temperature only varies 1 degree from...
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    It does have a very spectacular view.

    It does have a very spectacular view.
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    Yes I do. Anyone traveling to the mountains...

    Yes I do. Anyone traveling to the mountains soon??? I can't pay you much but I can show you great places to catch trout!!
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