How To Seal An Roof Top A C Unit

Removing the main unit from the roof.

How to seal an roof top a c unit.

When a new unit has been installed it must be properly sealed to prevent leaks. These are basically sheets of metal which rotate together. Remove the air conditioning unit placing it on its side and take out the sponge rubber gasket. Place the new gasket and reassemble the rooftop unit wiring and plastic housing.

You may also need to reseal an air conditioning unit if it has started to leak. Reconnect the wiring harness or use wire nuts to join the wires together. After you get the air conditioner free from the roof it is time to lower it down off the roof. Addison il august 24 2009 pres on the hvac industry s leader in adhesive gaskets and tapes has introduced a line of contractor grade curb tapes specifically designed to seal roof curbs to a c units preventing rain moisture and dust from damaging their increasingly sensitive electronics.

Once you see that it does attach the coolant container to the suction tubing and open it up. They open fully to allow air to enter the unit or they close to seal the unit and prevent air entering or leaving. Use a wonder bar or putty knife to pry loose the caulk and or butyl tape that was used to make a watertight seal on the air conditioner. The proper way to seal an rv air conditioner is to use a rubber compression gasket placed between the roof of the rv and the air conditioner.

Turn the air conditioner on by putting it on the lowest setting possible. Next position the air conditioner over the gasket and reattach it in reverse order to the rooftop. Read the gauge to make sure you need to top up or recharge. Once the old gasket is removed and the site is clean place a new gasket over the opening in the roof.

Verify that your work sealed your air conditioner by testing it out. Attach the manifold gauge to the suction side of the unit this is the large copper tubing.