DIYAPASON-L Digest #118 - Sunday, June 25, 2000
 
Re: [Residence Organs]  Re: [Residence Organs] relay for blower
  by "Bernard C. Nordmann" <bcnordmann@cdmnet.com>

 

(back) Subject: Re: [Residence Organs] Re: [Residence Organs] relay for blower From: "Bernard C. Nordmann" <bcnordmann@cdmnet.com> Date: Sun, 25 Jun 2000 12:52:10 -0500   At 10:27 PM 6/24/00 -0500, you wrote: >Hi fellow listers, > >I just bought a 15 amp single pole single throw wall light swith and >mounted it on the console. I took one lead from the power line that >supplied the blower and hooked it with 1pair 14 gauge insulated wire to >the switch. It turns the blower on and off just fine by supplying or >cutting off the power. I also have another light switch for the = rectifier >and a third one for the power supply that runs the Z-tronics relay. > >Bart Kleineweber     Hi Bart and all,   You didn't say what the size of your blower is. Generally speaking, a = motor starter for any motor over 1 HP is worth the investment. The main = advantage of a starter is its overload detector, which is closely matched to the motor current draw.   A plain switch on a line protected with a circuit breaker could easily = keep going while your motor cheerfully sets itself on fire or does something else equally repugnant.   A second reason may not be as obvious. Consider what can happen during a power interruption. Much of the time the power simply disappears for a while then comes back on. If you had the blower running during the power outage and in the mean time you decide to leave the house without turning the organ off, you'll fine it running again when you get home. A motor starter is controlled with "start" and "stop" push buttons; when the power =   fails, the starter's relay opens and won't close again after power is reapplied until you push the start button again. A less probable but certainly risky situation if you use a straight switch is if the power decides not to come up to full voltage or proceeds to rapidly turn on and off a few times. Either of these can damage the motor.   For one horsepower or smaller blowers, it's still a good idea to have a starter.   Regards,