charging dash AC unit
Hello I have an 2006 W24 chassis with the 8.1 engine I would like to add some freon to my system using using a charge kit from the auto supplier. My question is how much freon to put in as the sticker...
Forum Discussion
ALL motorhomes built since 1996 will have 134a in the system.
The ONLY way to know for sure you have the correct amount of 134a in the system is to drain and then fill with the amount of oz's/lbs that is required for your specific system. If you want to add 134a because over the years a slight amount has leaked out, you really need to connect the HI and LOW side to a set of gauges. You then slowly fill while watching the gauges to make sure the HI side does not get over 275 to 300 psi. You CANNOT use the dryer sight glass to watch the bubbles. A correctly charged 134a system will still have bubbles in the sight glass. IF you have (you really need one) a digital thermometer, you can stick it in the closest cold air discharge on the dash(usually the pass side). With a fast idle (1500 rpm) charge the system. have someone watch the Thermometer and YOU watch the gauges. When the AC reaches the saturation point, the thermometer will start to raise in temp. STOP when that happens. You have reached the full level. Doug
1.5 LBS 134A WITH NO AUX CONDENSOR FANS
2.0 LBS IF YOU HAVE THE 2 AUX CONDENSOR FANS.
The ONLY way to know for sure you have the correct amount of 134a in the system is to drain and then fill with the amount of oz's/lbs that is required for your specific system. If you want to add 134a because over the years a slight amount has leaked out, you really need to connect the HI and LOW side to a set of gauges. You then slowly fill while watching the gauges to make sure the HI side does not get over 275 to 300 psi. You CANNOT use the dryer sight glass to watch the bubbles. A correctly charged 134a system will still have bubbles in the sight glass. IF you have (you really need one) a digital thermometer, you can stick it in the closest cold air discharge on the dash(usually the pass side). With a fast idle (1500 rpm) charge the system. have someone watch the Thermometer and YOU watch the gauges. When the AC reaches the saturation point, the thermometer will start to raise in temp. STOP when that happens. You have reached the full level. Doug
1.5 LBS 134A WITH NO AUX CONDENSOR FANS
2.0 LBS IF YOU HAVE THE 2 AUX CONDENSOR FANS.
