Re: Dash Air Compressor Reply #25 – March 01, 2019, 01:18:18 pm I think it's actually getting good temperature drop across the condenser. 176deg in, 142deg out for a 34deg difference. Quote Selected 1 Likes
Re: Dash Air Compressor Reply #26 – March 01, 2019, 02:12:55 pm Quote from: Protech Racing – March 01, 2019, 12:59:29 pmFor that money you could probably figure out how to mount a 5000 BTU cheap window unit behind the dash and the inverter to run it .5000 BTU is way too small for a dash unit. You really need 12000 BTU or more in a dash unit. Lots of "greenhouse" heating with all of the glass areas around. Quote Selected
Re: Dash Air Compressor Reply #27 – March 01, 2019, 03:12:24 pm Quote from: bdale – March 01, 2019, 11:07:55 amWhat were the main issues and corrections for yours? I'm having chronic problems with my dash AC as well. Pressures are always too low on the low side or too high on the high side, per the charts. And cooling is only 15-20 deg below ambient. It's probably been in the shop for AC problems half a dozen times in the last year. New compressor, 2 different expansion valves (from FT), expansion valve manually adjusted to tune pressures, flushed twice, new condenser coil fan, new dryer, heat wrapped the exhaust at the condenser...nothing seems to help. The shop is willing to keep trying as soon as the weather warms up, under warranty, but they're stumped.The low pressure for my coach is below the chart, usually around 20 psi to get the cooling system to work. I haven't figured out the reason, but if it works don't mess with it. Quote Selected
Re: Dash Air Compressor Reply #28 – March 01, 2019, 05:20:08 pm 99's have a bigger dash ac unit. Squirrel cage motor fans can slip on the motors shafts Quote Selected
Re: Dash Air Compressor Reply #29 – March 01, 2019, 08:55:36 pm Quote from: Caflashbob – March 01, 2019, 05:20:08 pm99's have a bigger dash ac unit. Squirrel cage motor fans can slip on the motors shafts They can also run backwards if miss wired, airflow still comes out the vents in the normal direction, but volume is only 70-80% of design. Quote Selected 2 Likes
Re: Dash Air Compressor Reply #30 – March 01, 2019, 09:49:06 pm I have 5000BTU unit on the back part of my little house. Cools 400sq ft no problem . I would think that it would cool the front 15 ft of my bus with no problem . As it is now, I just run the overhead ac and genset if it gets warm . Since I added a one wire 100 amp alt, I should have enough alternator capacity to run an additional inverter , but have not done the math and so far it is a non issue . There seems to be room for it in the grille. Quote Selected
Re: Dash Air Compressor Reply #31 – March 01, 2019, 10:04:31 pm Quote from: Protech Racing – March 01, 2019, 09:49:06 pmI have 5000BTU unit on the back part of my little house. Cools 400sq ft no problem . I would think that it would cool the front 15 ft of my bus with no problem . As it is now, I just run the overhead ac and genset if it gets warm . Since I added a one wire 100 amp alt, I should have enough alternator capacity to run an additional inverter , but have not done the math and so far it is a non issue . There seems to be room for it in the grille. Good luck, Foretravels have big front windows, I have a 28000 btu dash unit, and it just barely keeps the first 3 ft cool, on a hot day. Quote Selected
Re: Dash Air Compressor Reply #32 – March 02, 2019, 11:03:02 am QuoteGood luck, Foretravels have big front windows, I have a 28000 btu dash unit, and it just barely keeps the first 3 ft cool, on a hot day.Jcus, have you converted your dash unit to a window unit? how is that done? Quote Selected
Re: Dash Air Compressor Reply #33 – March 02, 2019, 11:24:02 am Quote from: AncloteJoe – March 02, 2019, 11:03:02 amJcus, have you converted your dash unit to a window unit? how is that done?No, my point is that if my 28000 btu ac barely keeps me cool, would not expect a 5000 btu ac to do much for you. BTU's are the amount of heat your air conditioner can remove.You can use this calculator, but bear in mind that windows provide very little insulation and will allow the sun to heat the interior of the coach.BTU Calculator Quote Selected 2 Likes
Re: Dash Air Compressor Reply #34 – March 02, 2019, 03:34:44 pm Quote from: Protech Racing – March 01, 2019, 09:49:06 pmI have 5000BTU unit on the back part of my little house. Cools 400sq ft no problem . I would think that it would cool the front 15 ft of my bus with no problem .Consider the difference between cooling a 400 sq ft (typically insulated) room and cooling a 400 sq ft greenhouse on a sunny day. The "greenhouse effect" in a vehicle is real and significantly adds to the heat load. Quote Selected
Re: Dash Air Compressor Reply #35 – March 02, 2019, 08:06:59 pm I have a 200 ft roll if 3m clear for the windows. Blocks uv and heat. Going to do all of them. Including the windshield Quote Selected
Topic: Dash Air Compressor