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Furnace Replacement Rosemount MN | How to Install Central Air to Existing Furnace?

Furnace Replacement Rosemount MNThe air conditioning system in your home consists of a furnace and an evaporative cooler. In most cases, the two systems are separated because of their different functions and needs for electricity. A gas furnace requires more power than an evaporative cooler does, which is why it is usually located farther from your living room where there is more space to install more wiring and equipment. However, there are certain situations where you may want to have a contractor combine these two types of units—such as if you live in an old house that has ductwork running through every room or if you have limited finances that prevent you from installing separate systems entirely (or even just one). Furnace Replacement Rosemount MN

Preparing for Installation

To begin, turn off the power to your furnace at the breaker panel. This is an important safety precaution because you don’t want to be electrocuted while working on your furnace. You should also:

  • Turn off the gas supply to your furnace.
  • If you can’t turn off the gas supply at the meter, shut off your furnace and disconnect it from power.
  • Shut down both valves on either side of your furnace’s air handler (the area between where cold air comes in, and hot air goes out).
  • Close both pressure switches if there are two of them on either side of your furnace inlet ductwork.
  • Remove any pilot light wires, then unscrew or unplug the main power source that controls whether or not your system is working.

Mount a Low-Voltage Thermostat in the Living Area.

Next, you’ll need to mount the low-voltage thermostat in your living area. Most central air systems come with a wired remote control that has its own display. If you want to use this type of system, locate the device and install it according to the manufacturer’s instructions. In most cases, the wiring kit comes with everything you need—junction boxes and wire nuts for connecting wires together and mounting hardware for attaching components to walls or ceilings—but if there’s anything missing from yours and you don’t have any spares lying around, go ahead and pick up some extra supplies before continuing on with this step. You can usually find them at hardware stores like Home Depot or Lowe’s for under $20 per pack; just make sure they’re compatible with your thermostat model before heading out into the wild!

Note: You may also see some other types available; these are generally meant for small businesses where people spend more time indoors (like offices) than at home—although they can still be used by homeowners who don’t mind paying more upfront than they would otherwise need to do so during installation due simply because installing one requires a professional HVAC technician since they contain complex circuitry which must be wired correctly so as not cause damage when operating properly over time.

Install S-Brackets and T-Sections

Install S-brackets on the underside of duct work. Connect T-sections together to complete your ducting system.

Drill a hole through the ceiling directly above where you desire the thermostat to be placed. To ensure that you drill in exactly the right spot, use a pencil to mark where you want to place your thermostat. It’s also important that your wire is long enough to reach from one side of your house to another (or close enough). Use a drill bit that is slightly smaller than the diameter of your wires, and make sure it has a pilot bit attached at its tip so it can help guide itself into place as it makes its way through thick insulation or drywall.

Place Wire Nuts on All Electrical Connections

Connect wires together. Connect the black wire to the black and white wires at the furnace. Attach red, blue, and bare copper wires together with wire nuts at the furnace.

Connect the grounding wire to the grounding terminal on the new thermostat (see above).

Connect fan power supply wires to a circuit breaker or fuse panel in your electrical service panel box (see above). To avoid overheating, do not overload circuits that are already being used by other appliances or lights in your home:

Tie the red and blue lines together within the fan unit with a wire nut. Do not tie them together at the furnace, thermostat or PVC pipe!

Open up Small Holes in the Ductwork

Install a 2 in. hole through each sheet metal duct. Drill holes to 1 in. deep and use a punch tool to enlarge them enough for you to fit your wire through, being careful not to damage the ductwork. If you’re using a punch tool, be sure to wear safety glasses because of the potential for flying debris when cutting through metal with such equipment. Once all of your holes are made, secure them with wire nuts and then pull your wiring through from inside the wall until it reaches where you want them (in most cases this will be near where the furnace is located).

Connecting Electrical Wires

Connect the new furnace’s electrical wires to your existing system as follows: white to white, black to black, green to copper, and yellow to yellow. Yellow is for controlling an outdoor AC unit if you have one installed. You may need one or two more wires depending on which types of controls you have installed in your furnace. A typical gas furnace requires 18 AWG (American Wire Gauge) wire, although 14 AWG may be needed depending on your system’s total amperage draw.

Once all of the wires are connected correctly and securely tighten them with a screwdriver or pliers so they do not come loose during operation.

Furnace Replacement Rosemount MN

We hope this information has been helpful and if you have any questions or comments please feel free to contact us. We are Rumpca Services in Rosemount, Minnesota, and would be happy to assist you with your next HVAC project!

Furnace Replacement Rosemount MN

Furnace Replacement Rosemount MN

Furnace Replacement Rosemount MN

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“I really enjoyed working with Rumpca. They were efficient, courteous and the work product was superb! I will gladly work with them in the future.” – Nick Swedberg

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“The replacement of the furnace and A.C. unit went smoothly. A small problem with the clearance of the furnace front access door to the closet door in front of it was remedied by moving the furnace back a half inch or so.” – Rod Heuer

“We have had the privilege of working with Rumpca Services for several years, as they frequently service our rental properties as needed. Their customer service, efficiency, knowledge, and quality of work are unbeatable.” – Crystal Wink

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