trying to add a booster fan to a goodman a-30

ed wallace

no can do if the unit is 220volts then you cannot directly add a 110volt booster fan

john nelson_2

trying to add a booster fan to a goodman A-30

where do i hook the hot wire to have my booster fan come on with the main blower. the main unit is 220v, and the booster is 110v. the motor has 3 wires and a ground. 1 red, 1 black, 1 purple. the red is not used (for low speed blower) the purple is connected direct from the terminal block L-1 to the motor, the black comes off the blower time delay relay (btdr) switch tab 1. then there is a red wire coming off the btdr tab 3 that goes to the terminal block L-2. then a white wire off tab 2 that goes to a honeywell aquastat. then theres 2 blue and 2 green wires on the btdr 2 one of each color go to the transformer and the other 2 connect to the thermostat wires. please help the end room needs some help.

bill_51

you will need to have a neutral going to your furnace..........connect the black wire of the booster fan to the black wire that is on the blower motor( the one that is connected directly to the time delay) then you will need to connect the white wire from the booster fan to the neutral in the furnace. if you do not have a neutral in the furnace then you will either have to go with a step down transformer that is powered with the blower fan or get a 220v booster fan. if you are not sure what a neutral is then i wouldn't suggest doing any electrical work and that statement isn't meant to degrade your capabilities, just a safety tip. there are several other ways of going about wiring it but those are the simplest i can think of without seeing your furnace. booster fans in my eyes are a bandaid for the "poor duct design" scenario. they can of course be alot cheaper then redoing your ductwork

jim murtaugh

booster

use a current sensing relay and another relay and get your 120 volts from wherever you want.

Jeff Lawrence_24

Ducting?

I just saw this message, so excuse me for bringing it back up to the top.

If there is a need for a booster fan in ductwork, there may be a problem with the design of the duct system. A properly designed system will give even air flow thoughout the entire house.

What I've seen of booster fans is their life expectancy is not great.

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S Ebels

What he said

If you need a booster, you have a problem with your duct system. Fix it right, a booster is just a band-aid.

john nelson_2