Installing a New Central Air Conditioning System – Part 3
2:15pm – It has to be about 120 degrees in here! I’ve re-connected the fans to get a little circulation going, but that’s having as much effect as a fart in a wind storm. The guys get back from lunch and I give them the lowdown on the draining situation. Not a problem for the pros, just a minor setback. We’re going to pull off the silver tape and undo the metal screws so that we can re-level the air conditioner so that the condensation will flow out properly. We take a little of the old insulation and built up the base under the drip pan until we hear a steady flow of water out of the drain pipe. OK, now we fire it back up so that we can test it with a steady flow of condensation to make sure it’s not collecting anywhere in the unit. Ohhhhh, that feels so good! After about 15 minutes, a spot check indicates that things are flowing as they should so we fasten and tape things back in place.
3:00pm – We just barely made it! Any longer without the air running and we would have started cooking up here. The water and Gatorade supplies are about gone. Now we’re all looking forward to some cold beer after the job is done. What’s left is conecting all of the ductwork and this can be done while the air is blowing cold into the attic. The first part of this stage is fitting the junction box. This is a pre-fabricated cube constructed of insulation with one face connected to the output of the air conditioner, and up to five branches coming off of it (in our case we only have three. The first thing we’re going to do it measure and cut holes for the three duct branches. We do this first beause it’s easier to do before the junction box is mounted to the air conditioner, and it will allow the air to flow freely after it is mounted. Now we measure and cut a square out of the face of the junction box that will fit to the air conditioner. We fit it in place and use a liberal amount of silver tape (the installers best friend). Now we connect the duct branches to the holes we cut in the other three sides in pretty much the same fashion.
5:00pm – The cold air is now running throughout the house and the thermostat is slowly starting to inch downward. We still have a few things left to do, like connecting the exhaust pipes for the heater and clean up inside and out, but overall we’re saying ‘mission accomplished’ and we’re sitting down for a few well deserved cold beers…ringht under the air conditioning vent (-;
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