wil-burt timer

wil-burt timer

PostBy: rfeld On: Tue Dec 18, 2007 4:35 pm

Does anyone know how to test a wil-burt timer on df520. The whole rig is new but I have no way of knowing if the timer is actually working.
rfeld
 
Stove/Furnace Make: efm
Stove/Furnace Model: df520

Re: wil-burt timer

PostBy: stoker-man On: Tue Dec 18, 2007 5:34 pm

If the timer is wired properly, your stoker motor should start up for 3 minutes every half hour. In the Winter you don't need the timer, but in the Summer, you will. In every cycle, 120 Volts will travel from the timer's #4 terminal to ZR on the triple aquastat.
stoker-man
 
Hand Fed Coal Boiler: 1981 efm wcb-24 in use 365 days a year
Coal Size/Type: Anthracite/Chestnut
Other Heating: Hearthstone wood stove

Re: wil-burt timer

PostBy: rfeld On: Tue Dec 18, 2007 6:43 pm

Thanks for you input stoker-man. I always have 120v across #2 and #4 no matter what. When should there not be power going #4?
rfeld
 
Stove/Furnace Make: efm
Stove/Furnace Model: df520

Re: wil-burt timer

PostBy: stoker-man On: Tue Dec 18, 2007 8:04 pm

Check your wiring. 120V source voltage to #1, source neutral to #2, #3 is a jumper from #1 and has the same voltage as #1, and #4 goes to ZR of the aquastat.
stoker-man
 
Hand Fed Coal Boiler: 1981 efm wcb-24 in use 365 days a year
Coal Size/Type: Anthracite/Chestnut
Other Heating: Hearthstone wood stove

Re: wil-burt timer

PostBy: rfeld On: Tue Dec 18, 2007 8:41 pm

That's the way it's in there. I think the switch is permenently closed for some reason since there is always power to #4
rfeld
 
Stove/Furnace Make: efm
Stove/Furnace Model: df520

Re: wil-burt timer

PostBy: stoker-man On: Tue Dec 18, 2007 9:07 pm

There is a microswitch in there with a 1 inch spring steel arm that rides on the round wheel. When it hits the notch it makes or breaks. See if the arm is broken off or the contacts are frozen together. It is a replaceable part.
stoker-man
 
Hand Fed Coal Boiler: 1981 efm wcb-24 in use 365 days a year
Coal Size/Type: Anthracite/Chestnut
Other Heating: Hearthstone wood stove