Welcome to the Hatteras Owners Forum & Gallery. Sign Up or Login

Enter partial or full part description to search the Hatteras/Cabo parts catalog (for example: breaker or gauge)
+ Reply to Thread
Results 1 to 10 of 20

Thread: Cruisair help

Hybrid View

  1. #1

    Cruisair help

    Working on the master stateroom A/C - 12,000 btu. The unit hasn't been cooling as well lately, so I set about to do the annual adding of a small amount of R-22. At this time, it's only cooling the air 17 deg. According to the charging curves in the installation & operation guide, I should be seeing around 62 psi on the suction and 175 psi on the discharge with the air & water temps we have. Seeing 58-59 on the suction and 230 on the discharge, superheat is between 11 and 12 deg, and the subcool 10-11 deg. Temps are cooling down here, 74 deg inside air temp and 67 deg water temp so I can understand the lower superheat numbers, but why am I running such a high head pressure? Restriction in the line? The air handler is clean. When put into heat mode, it blows some warm air for a short time until the compressor kicks off. The high side line, which should now be the suction when reversing is way too hot to touch. After running 20 -30 minutes cooling, the compressor starts to ice up. The air handler is not icing up. I haven't measured pressures when heating yet.

    Does anyone have any ideas what I should look for?

    Randy

  2. #2

    Re: Cruisair help

    Not getting rid of the heat. Clean the condenser.....Pat

  3. #3

    Re: Cruisair help

    And in heat mode not picking up heat from the water

  4. #4

    Re: Cruisair help

    Sorry about multiple posts but can’t edit from iPhone , so water flow could be issue also or dirty condenser / heat exchanger.Check water flow and strainer first.

  5. #5

    Re: Cruisair help

    Thanks Pat. I have not cleaned the condenser since we've had the boat. It's one of 5 units all fed by the same pump, the rest are working fine & good water flow so I didn't think about that. There could be a restriction in that condenser, especially since we went from saltwater to freshwater. I'll rig up the plumbing to backflush the system. Is everyone still recommending phosphoric acid diluted or do I go with barnacle buster?

    Randy

  6. #6

    Re: Cruisair help

    I used ospho last time but do not remember the dilution . Although I think it was 1 acid to three water.....Pat

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts