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Type: Posts; User: cinergi

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  1. Replies
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    Thanks skippedover! It doesn't bother me as long...

    Thanks skippedover! It doesn't bother me as long as it doesn't damage the accumulator (e.g. through increased weight or vibration).

    cinergi
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    Ice on accumulator - normal?

    Hello,

    I noticed this morning that there's ice built up on my heat pump's accumulator canister. The ambient temperature is -10 C. The coil is NOT frozen - there's absolutely no ice on it and...
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    1,664

    Thanks to all! Looks like the consensus is to...

    Thanks to all! Looks like the consensus is to leave it alone :-)

    kdean1 - You are correct, I'm referring to the thermostat allowing the heat pump to run for 30 minutes and only if the call is not...
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    Heat pump and heat strips on simultaneously?

    Hello,

    I have a heat pump with electric heat strip auxiliary heat. The heat strips are located downstream of the coil. My thermostat can be configured to allow the heat pump and heat strips to...
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    I have a Robertshaw 300-208. -cinergi

    I have a Robertshaw 300-208.

    -cinergi
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    1,587

    Defrost sequence

    I have another question regarding the defrost cycle (out of curiosity): what happens if the thermostat ends the call for heat during a defrost cycle? Does the heat pump stop, or continue its...
  7. Replies
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    1,587

    Thanks to all who replied. I'll go by the advice...

    Thanks to all who replied. I'll go by the advice given and leave my defrost board alone!

    By the way, regarding Trane - my parents have an XL-1200 which incorporates the compressor cycling by...
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    I see your point. Then I guess the question is,...

    I see your point. Then I guess the question is, what causes more wear and tear - cycling the compressor, or not equalizing the pressures?

    cinergi
  9. Replies
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    Carrier 38YRA defrost board upgrade

    Hello All,

    I have a Carrier 38YRA heat pump from 1997. It has the CESO110063 defrost control board. I'm interested in upgrading to the newer CESO130076 defrost board, which has a compressor...
  10. Hi Crazy4thenucks, Do you mean that it's...

    Hi Crazy4thenucks,

    Do you mean that it's possible for an attacker to connect using Wi-Fi to the thermostat (say, from a car parked on the street in front of your house), and from there access...
  11. Have a look at the Ecobee thermostat...

    Have a look at the Ecobee thermostat (www.ecobee.com), the most advanced standalone thermostat currently available (in my opinion). It has Wi-Fi access, a Web portal that can be accessed from any...
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    Final resolution

    Just wanted to post the final update. The reversing valve was replaced last week, and everything has been running fine since then. The technician found a lot of black sooty "gunk" in the lines and...
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    The tech clearly showed me it's the reversing...

    The tech clearly showed me it's the reversing valve by manually jumping 24 VAC to its coil. I could hear the coil clicking, but there was no accompanying "whoosh" sound as usually happens due to the...
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    Possible, but a dryer was installed after the TXV...

    Possible, but a dryer was installed after the TXV failed 2 years ago. It's still there.

    cinergi
  15. Replies
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    It's a TXV inside the house adjacent to the...

    It's a TXV inside the house adjacent to the indoor coil. It actually had to be replaced 2 years ago because the old one was sticking, causing the heat pump to go out on high pressure cutoff.
    ...
  16. Replies
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    The tech came over earlier today. The problem is...

    The tech came over earlier today. The problem is a sticking reversing valve. He tried to change the coil but that didn't help, so he needs to change the valve - a much bigger job as I'm sure you...
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    No, I didn't see any ice melting during the...

    No, I didn't see any ice melting during the defrost cycle, nor did I feel any warmth coming out of the top of the heat pump. After the "whoosh" sound midway through the cycle, however, I did hear...
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    Thanks to all who replied. The heat pump...

    Thanks to all who replied. The heat pump lock-out temperature is set to -8 C. I've never had a problem with frosting before, even during freezing rain.

    Heat pumps are very common in my area...
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    Montreal, Canada. It gets down as low as -20...

    Montreal, Canada. It gets down as low as -20 Celsius (currently -11).

    -cinergi
  20. Replies
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    Frost on heat pump

    Hi,

    Yesterday I noticed that my heat pump was running longer than usual and the aux heat strips kicked in at an outdoor temperature where the heat pump can usually handle the load itself. I...
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    Heat pump shutting off

    Hi,

    Today, my heat pump began behaving strangely. When the thermostat calls for heat it turns on for approximately 10 seconds, then shuts down again. This process repeats every 5 minutes as...
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    It's an R-22 system, circa 1996. The tech said...

    It's an R-22 system, circa 1996. The tech said the same thing: he rarely has problems with the R-22 systems, but often replaces various sealed-system parts on the R-410 units because of the higher...
  23. Replies
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    He cleaned the condenser coil. The evap was...

    He cleaned the condenser coil. The evap was clean (I'm careful about my filter maintenance!)

    -cinergi
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    Update

    The TXV was replaced, lines nitrogen purged, system recharged, and a new filter drier installed. System runs great now.

    -cinergi
  25. Replies
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    Update

    The tech has diagnosed my problem. I'm not sure what it's called, but it's the valve on the thinner of the two refrigerant lines inside the house at the evap coil. Apparently this valve is sticking...
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