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MMD > Archives > May 2007 > 2007.05.02 > 08Prev  Next

Pipe Organ Blower Motor Problem Solved
By Bruce Newman

Dear MMD,  My sincerest gratitude goes out to all of you who have
helped me puzzle through the wiring of my pipe organ blower.  Robbie
helped me understand the differences between power mains in England,
which only use one hot line at 220V and a neutral, as opposed to our
dual 110V system.  That explained why the wiring diagram showed one
of the leads connecting to "N" for neutral rather than to the second
110V hot line.

I went ahead and connected the wires as the diagram indicated
substituting a hot lead for neutral and using the starter control as
a three-pole relay.  I clamped a plastic ice cream bucket on the outlet
of the blower, crossed my fingers and threw the switch.  She purred to
life coming right up to speed giving 7-1/2" of wind.

I gave the motor the sniff test (no smoke), I felt the heaters on the
starter control (cool to the touch), and felt the motor (warm but not
hot).  I ran it for 20 minutes with no problems.  When I turned off the
switch and the motor slowed, I could hear the familiar click and whir
of the centrifugal switch reconnecting the starter winding.

Of course, nothing is easy in this business, right?  I went inside the
house to eat supper and came back out to the shop to bask once again
in the glory of my great accomplishment.  I turned on the blower and it
only gave me 6 inches of wind and then the starter control switched off
with one of the heaters very hot.  The whole time the motor was running
I could hear the clicking of the contacts on the centrifugal switch so
my new problem is that old grease and gunk has probably built up inside
causing the centrifugal switch to stick 'on' and heating up the starter
winding and tripping the control.  Well, that's going to have to be a
project for another day...

Thanks again to everyone for all your help -- the Digest is such an
incredible resource!

Warmest regards,
Bruce Newman

(Message sent Wed 2 May 2007, 03:25:04 GMT, from time zone GMT-0400.)

Key Words in Subject:  Blower, Motor, Organ, Pipe, Problem, Solved

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