[CHIP]

either he knows how to work on R22 units, or he doesnt. . if he is knowledgeable about R22 units – then he’ll be able to do it. If he is a hack – then good luck. It isnt as easy as giving target pressures. there is ambient air temperature, inside termperature, etc . . . but you should try and get a 14-18 degree drop in air temperature.

[Bill]

Dana at AAP has several ways of knowing the system is working as efficiently as possible and he checks all three.

The obvious one is a check of system pressures. Those vary based on ambient temperatures so your guy should not be shooting from the hip, but should be using the charts. If he is highly experienced he doesn’t have to have a chart in front of his face, but he will know pressures vary because of ambient temps and he will know what pressure he needs to see.

The suction line at the condenser is at its coldest when the pressures are correct. Too much or too little R22 charge and the suction line is not at its optimum temperature. One old timer calls that “beer cold” and while it sounds like something a shade tree mechanic might say it is a second indicator of the system’s health.

When all is done a final check is made and that is a measurement in the coach of the supplie and return air. Anthem is correct in the values and 14 is considered the minimum. Any spread in temps greater than that is even better. He has indicated differences between units through the coach can be expected so if one is a 14 degree spread and another is 20 it doesn’t mean the one with 14 degrees is bad because there are factors relating to the evaporator installations that influence the spreads.

[Ronald]

One of my Cruisair does not have any condensation coming out of the drain tube under the coach. I poured water in the tray and the water came out under the coach so the drain tube is clear. The unit gets pretty cool but I am sure it could be colder. What could be causing no condensation?

[Frank]

Are you in Las Vegas or some other extremely low humidity area? Ours usually pour water but here in Vegas……nothing!

[David]

I live in Apple Valley Ca (High Desert).

Yesterday was 89 with 10% humidity.

Frank

[Archived]

After the Cruise-Airs “dry out” the already dry interior of the coach, there isn’t much condensation if any that’s coming out. I’ve noticed that if the condensation drain point is in the sun or on blacktop, on a hot, sunny day the condensation doesn’t last very long.

I’d guess with 10% humidity it might evaporate before it hits whatever is under the coach.

Are the C/As keeping the coach cool inside? What’s the humidity in the coach?