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  1. Please tell. :-)

    Please tell. :-)
  2. I bumped into the installer for my building. ...

    I bumped into the installer for my building. There is no Glycol in our loop. :-(

    Also, he said they are sending us a new low pressure switch. We believe it is going to be lower cut off. ...
  3. Anti-freeze is my wording. :-) I thought that...

    Anti-freeze is my wording. :-) I thought that was the purpose of Glycol. After a Google search maybe that's not the case. ha

    Anyway, he just said it was a water loop. I know he said something...
  4. Thanks Beenthere. Nice to have confirmation they...

    Thanks Beenthere. Nice to have confirmation they are on the right track to get this thing fixed. I am a little concerned that he has to open up the system and re charge but I guess there is no...
  5. Found something else. I am confused now. I...

    Found something else. I am confused now.

    I am reading the schematic for the heat pump and it clearly slows the low pressure switch and it says 90 PSI cut in, and 100 PSI cut out. I interpret...
  6. Ok Here is what I have. Thanks for looking at...

    Ok Here is what I have. Thanks for looking at this. These are hand written on the Check-out Sheet which is part of the manual. I type fast so I'll just type them in.

    Mammoth D036HH0...
  7. Well. Out of 74 total units (building built in...

    Well. Out of 74 total units (building built in 1997) about 1/3 of them have been changed. I have no idea what the original ones were. Over the last couple years they were using Mammoth as...
  8. Beenthere. Isn't 27 bad since that is below...

    Beenthere. Isn't 27 bad since that is below freezing?? I REALLY wish I could measure it. Nobody has measured it other than to say it's 70 in winter time. :-( Apparently they keep it 70 winter...
  9. More info. Apparently Mammoth has gotten back...

    More info.

    Apparently Mammoth has gotten back to my installer. The engineers are saying the wrong low pressure switch is installed in the unit. I think you guys might be able to give me your...
  10. I just went up to the heat pump and felt the...

    I just went up to the heat pump and felt the lines going to, and coming from the heat pump. They felt cool. Not cold, not hot. I wish I had a way to measure the temp.

    I took some pics of the...
  11. Yes, I own my condo. I got a contact person at...

    Yes, I own my condo. I got a contact person at Mammoth but I can't get through to him. His voicemail is full and the operator also goes to voicemail. These guys are under contract for the...
  12. The saga continues. Looks like now Mammoth wants...

    The saga continues. Looks like now Mammoth wants to pay to have the HVAC guys remove the heat pump (take down drop ceiling, disconnect) and change "a part in the refrigeration loop". I am guessing...
  13. I just shut off the heater because it got too...

    I just shut off the heater because it got too warm in here Thermostat says 72 at the moment and 29 degrees outside. I did have the oven on a few hours ago though. Also, I am sure my 600 watt 42"...
  14. Well the 1500 watt heater is now lacking a little...

    Well the 1500 watt heater is now lacking a little bit. It was in the low 20's last night with wind. It now has a hard time getting things up to 70 degrees after a few hours of running.

    I...
  15. Well, assuming it does get down to negative...

    Well, assuming it does get down to negative temps... -20 F and wind. Perhaps a bit more than 1/2 ton ;-)

    I did a quick on-line load calc and got 1 ton with my estimates and design temps for my...
  16. Haven't used the heat pump at all. I find...

    Haven't used the heat pump at all. I find running the 1500 watt electric heater for about an hour can keep the apartment at 72... or warmer depending how long I leave it on.

    I turn the fan only...
  17. It's not just this company. My last building was...

    It's not just this company. My last building was straight AC and water loop boiler. Each apartment had an AC compressor on the roof (25 units). That contractor was no better. I was on the condo...
  18. It's a cooling tower and a boiler system. It...

    It's a cooling tower and a boiler system. It automatically switches over to mantain the loop temperature. I figured that was a normal way to do it. I have no clue.

    I do know that a few...
  19. Absolutely. The apartment really does stay warm ...

    Absolutely. The apartment really does stay warm The oven will raise the temp a few degrees and the 1500 watt electric heater has been able to keep the entire apartment at 72 with out issues. I do...
  20. Well I promptly heard from the rep in Albany. He...

    Well I promptly heard from the rep in Albany. He told me he has been working with my installer and Mammoth to get a factory guy to fly out to work on my heat pump. So it looks like they are working...
  21. I have decided to leave the heat pump off by the...

    I have decided to leave the heat pump off by the way. I will buy an large electric heater for this weekends cold snap. I am sure I can put up with the cold since it's an apartment and stays fairly...
  22. Hi Guys, Just noticed all this feedback!! ...

    Hi Guys,

    Just noticed all this feedback!! Thanks! I have been making calls this morning but not getting anywhere. My closest rep according to the Mammoth webpage is 3 hours away in Albany. I...
  23. Thanks. I have the property management involved...

    Thanks. I have the property management involved now to help out.

    Since this is the second heat pump that had very similar issues (low heat mode pressure) I asked the tech a few times about the...
  24. Running water sourced heat pump with low pressure switch disabled. OK or bad??

    I live in an apartment with a water sourced heat pump. After a lot of debug time the first heat pump was a year old when it was replaced under warranty (I paid labor to instal).

    This heat pump...
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    Hate to have to bring this thread up again!!! ...

    Hate to have to bring this thread up again!!!

    My heat pump was changed in June last year. I paid labor unit was warranty. It ran in cooling all summer no issues whatsoever. I recently...
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    If it doesn't get replaced, I'll give them one...

    If it doesn't get replaced, I'll give them one more try. They have been very good to me so far. Have only charged me for one service visit even though they have been to my place a bunch of times. ...
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    I am afraid I am back again. The companies are...

    I am afraid I am back again. The companies are arguing about replacing the heatpump. Not sure what will happen. I am not sure the HVAC guys can do diagnostic work. They simply check pressures,...
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    Thanks. It will be good to have this behind me!!...

    Thanks. It will be good to have this behind me!!

    One more question. It seems the heatpump has 3 fan settings. My current one was left on high... I think they just leave them on high upon...
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    Update. Guy was here this morning. He said...

    Update.

    Guy was here this morning. He said super heat was high, pressures were high. Cooling temp diff was low (12 degrees). He tried adjusting TXV but couldn't get it to change. TXV worked...
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    Beenthere, thanks for helping!! I just got home....

    Beenthere, thanks for helping!! I just got home. Temp in apartment was 73, 70 degrees outside not much sun coming in. I lowered the Tstat to 70.

    I measured a supply vent in my bedroom. The heat...
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    At the registers. The supply register I used was...

    At the registers. The supply register I used was furthest from the unit. I wasn't thinking there was much temperature delta in the ducts since they basically run just above my ceiling below the...
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    Sorry revive this thread..... more problems it...

    Sorry revive this thread..... more problems it seems. I am looking for some help in deciding to call the guy back or not.

    So the original problem with my heat pump was a low pressure cut out the...
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    Hate to bring this thread up again but it is...

    Hate to bring this thread up again but it is still not fixed. The HVAC guy was here all day Thursday last week. The manufacturer is now paying for all this work. They told him to drain the water...
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    Thanks. After the heat was off for a few...

    Thanks.

    After the heat was off for a few hours, I came home and turned on cool mode. It didn't trip. So it looks like the issue is only with heat. I would guess it's probably a slow TXV, or...
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    I have two TXV's? I don't know. I thought the...

    I have two TXV's? I don't know. I thought the reverse valve only stays in one position mostly.. until you change modes heat to cool.

    I haven't used cooling mode much but from what I have seen it...
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    True. I think Beenthere might be onto something...

    True. I think Beenthere might be onto something with the slow TXV. This unit was installed 2 years ago (before I owned it) and I think they have been adding and removing refrigerant to get it to...
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    I think they said they keep the loop at 70...

    I think they said they keep the loop at 70 degrees. My heat pump doesn't run anywhere near that amount of time. It can't. I have someone above me, below me and on 2 sides. Even when it's -15F I...
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    Hi Beenthere, thanks for the response. It...

    Hi Beenthere, thanks for the response.

    It started fine this morning after being off all night Condo was 70 last night and this morning before raising to 72. Since it's a condo it never really...
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    Well heat worked fine last night and first thing...

    Well heat worked fine last night and first thing this morning (after being off all night). Came on this morning no tripping during two heat cycles then I went to work. Lowered heat again (heat...
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    Well... over a year ago he added some. Then a...

    Well... over a year ago he added some. Then a year ago he took some out because cooling mode wasn't working. Then I bought the apartment and heat wasn't working, so he added some back in, then...
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    Think he got this solved today. I figured I...

    Think he got this solved today. I figured I would update this in case it helps others.

    First thing he did was to put on his gauges and temp probe. Mammoth asked him to check Superheat and...
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    Still dealing with this problem. HVAC guys...

    Still dealing with this problem. HVAC guys coming back Monday. Turns out the manufacturer (Mammoth) says that there should be no low pressure delay needed for this model heatpump. They said the...
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    This looks like the board I need. A pressure...

    This looks like the board I need. A pressure delay is easily set through DIP switches.

    http://www.mammoth-inc.com/Portals/13/Literature/MAMM%20WHSP%20IOM%20HP5A%201011.pdf
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    UPDATE. After waiting for a month for this...

    UPDATE.

    After waiting for a month for this back ordered control board I just called and they are now telling me there is no board for my heatpump!!

    So I have a heatpump that is cutting out on...
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    Does this heat pump come pre charged from the...

    Does this heat pump come pre charged from the factory? I thought they had to charge it when they originally installed it anyway so they are just playing around with what they did in 2011?

    I...
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    Really? I just thought you change the board to...

    Really? I just thought you change the board to allow more delay and that's it. I am no expert. I doubt they were thinning of doing all that but I can ask about it.

    Can I ask why all that...
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    I don't shut it off at night but I do lower the...

    I don't shut it off at night but I do lower the temp to 65. I like it cold when I sleep. Even if I lower it to 65 before bed and outside temps are below -10 F the condo will still be 68 in the...
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    Turns out Mammoth shipped my heat pump with the...

    Turns out Mammoth shipped my heat pump with the wrong control board. The one installed doesn't have a setting for a delay which is not correct. They are covering the cost of a new board and I just...
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    I timed how it long it takes to cutoff when first...

    I timed how it long it takes to cutoff when first started. It's 2 seconds before it starts (once thermostat signals heat) then 13 seconds later it cuts off.

    The service tech ordered a new...
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    Thanks for the help. System was installed in Feb...

    Thanks for the help. System was installed in Feb 2011. Seems like there couldn't be scale build up in that short amount of time. Also, if the TXV were bad wouldn't I have problems other than just...
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