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Posted by lp13-30 on September 12, 2006, 11:12 pm
The sequencer is nothing but a switch to turn the heat strips and blower
on when it gets 24 volts it. It is called a sequencer because it brings
the strips on one at a time (in sequence) rather than all at once,
mainly to keep lights from dimming etc, as itwould do if all came on at
once. Get a voltmeter and check between the white and common thermostat
wires at the air handler. Common should be blue. With the thermostat
off, there should be 0 volts. When he thermostat calls for heat, it
sends power from the red tstat wire to the white, putting 24 volts to
the sequencer, bringing the strips and blower on. If it is getting
24volts, disconnect the white at the thermostat and check again. If 0,
it is getting the voltage from the thermostat, if still 24, it is most
likely a short in the thermostat wires. Is this a heat pump, or just
electric heat? If it is, then it could also be shorted in the thermostat
wires going between the air handler and the ouside unit, or possibly a
bad defrost control board in the outside unit. Just go by the processs
of elimination til there is no 24 volts to the seq. Let me know what you
find. You in or near San Antonio? Larry
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Posted by nowforsale on September 9, 2006, 1:08 pm
the motor in this unit is 1/3 horsepower and the blower is wired for slow
speed, is there way to reduce the speed even more? maybe even have it to
where the speed could be adjusted in a variable fashion, like maybe hooking
up a light dimmer switch inline on the motor wiring?
Janitrol Model A36-15
Schemtaic here http://www.ceridium.com/schematic.html
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