HELP QUICKLY!!! HARMAN ACCENTRA FS, WHAT TERMINALS ON THE 2 SPEED CONV. BLOWER GO TO RED, BLUE, WHIT

  • Active since 1995, Hearth.com is THE place on the internet for free information and advice about wood stoves, pellet stoves and other energy saving equipment.

    We strive to provide opinions, articles, discussions and history related to Hearth Products and in a more general sense, energy issues.

    We promote the EFFICIENT, RESPONSIBLE, CLEAN and SAFE use of all fuels, whether renewable or fossil.
Status
Not open for further replies.
whit - #1
blue-#2
Red-#3
 
bottom rt should be #1
bottom lft should be #2
top lft should be #3


at any rate, the side with 2 spades are #2 & #3....#1 is across from #2.
hope that makes sense.
 
blowing fuses in test mode?
 
Hi Scott

Motors will not draw the same current all the time, usually they draw more at startup. Running the blower on high draws more amps than on lower settings. If the motor needs lubrication it will also draw more current.

Bad starter windings might turn the motor just fine when the motor is warm but not work at all when the motor is cold because the cold adds more resistance. Sometimes you can kick start the blower by pushing the blades with your fingers to get it going like the old prop planes.

When current flows through the windings around the motor, it creates a magnetic field that turns the shaft. As these windings age or become shorted, the magnetic field strength weakens and more current is drawn. This is why fuses are needed so when there is excessive current draw and smoke there is no fire if there is a short circuit.

Remember, Heat, noise and vibration eventually cause motor failure. This is why lubrication and cleaning help prolong the life!

Anyway, the blower should always draw less than the fuse rating, if not the motor windings are on the way out and the motor or blower really should be replaced.

P = I*V
So let's use this Fasco blower for example:
http://www.grainger.com/Grainger/DA...cm_sp=IO-_-IDP-_-RR_VTV70300505&cm_vc=IDPRRZ1
115 Volts, 1500 RPM, 0.74 Full Amps load into Free Air, 134 CFM, 60 Hz

Astoria Convection Blower Fan voltage for different speeds
Speed   Volts AC   CFM
6       110       165
5       105       157.5
4       100       150
3       90         135
2       85         127.5
1       70         105

So using the electrical formula for Power
and say medium speed of 90 volts at a current draw of approx .40 amps
P= 90 * 0.40 = 36 watts

Since pellet stove motors fall between light duty and standard duty since they are only used in the colder season, a life expectancy of 4 - 7 years if properly cleaned and maintained


Click to enlarge the Motor Failure Chart Below:
http://www.maintenanceworld.com/Art...ubleshooting-electric-motors.htm#heatnoisevib
 

Attachments

  • MotorFailureChart.jpg
    MotorFailureChart.jpg
    81.4 KB · Views: 206
Delta-T said:
blowing fuses in test mode?
yes, as soon as it powers up butthe only onwant low speed. If I swap the leads off the switch for 2 and 3a it blows on the opposite pole of the switch...switch good, low speed on motor bad....looks like they are using high or buying a new motor. Thanks for the help folks.
 
smwilliamson said:
Delta-T said:
blowing fuses in test mode?
yes, as soon as it powers up butthe only onwant low speed. If I swap the leads off the switch for 2 and 3a it blows on the opposite pole of the switch...switch good, low speed on motor bad....looks like they are using high or buying a new motor. Thanks for the help folks.

How old is the blower Scott?
 
Don2222 said:
smwilliamson said:
Delta-T said:
blowing fuses in test mode?
yes, as soon as it powers up butthe only onwant low speed. If I swap the leads off the switch for 2 and 3a it blows on the opposite pole of the switch...switch good, low speed on motor bad....looks like they are using high or buying a new motor. Thanks for the help folks.

How old is the blower Scott?

embplast 2006
 
smwilliamson said:
Don2222 said:
smwilliamson said:
Delta-T said:
blowing fuses in test mode?
yes, as soon as it powers up butthe only onwant low speed. If I swap the leads off the switch for 2 and 3a it blows on the opposite pole of the switch...switch good, low speed on motor bad....looks like they are using high or buying a new motor. Thanks for the help folks.

How old is the blower Scott?

embplast 2006

Well over 4 years so that can take it's toll especially with the noise, heat and vibration from a pellet stove.

What is your experience in how long blowers last, except ones that fail early from manufacturer defects?
 
Status
Not open for further replies.