Custom control schematic for older Pellet stove

Have you asked the company who sells their products in smaller quantities?

Snowy thanks for the schematic. I'll save it so when my control bd dies I'll put one together.

Thanks for all your hard work on this.

correct me if I am wrong, but did not someone else post a different timer source in this thread that was not 250.00 min order?

I am majorly impressed, Snowy! Have you ever looked at the Cublok systems? Very inexpensive and can be programmed either in Basic or Ladder Logic Diagram (which I like better). http://cubloc.com/product/01_01.php

Click to expand...

DirtyDave said:

correct me if I am wrong, but did not someone else post a different timer source in this thread that was not 250.00 min order?

I am majorly impressed, Snowy! Have you ever looked at the Cublok systems? Very inexpensive and can be programmed either in Basic or Ladder Logic Diagram (which I like better). http://cubloc.com/product/01_01.php

Click to expand...

Click to expand...

The Cublok is a totally different animal. It's a programmable controller whereas Snowy is using a much simpler yet sturdier single purpose timer controller.

Pell It: I did a search for "relay timer program recycle one shot" and some combinations of these and got several that would fit the bill I think. Tyco, Omron, Mangacraft, and others should do the job. Jamco and Newark Electronics should be sources as well as others. I like the Precision product but the price seems high compared to the alternatives, especially with the $250 minimum.

If anyone comes up with ones that are particularly attractive let me/us know!

This needs to be a sticky..........

Snowy Rivers said:

Here is a copy of a schematic that I have used to rewire a couple older Pellet stoves.

Had a member ask about it, so here it is for all to use.

Things can be tweeked a little here and there to suit the specifics of the stove being retro fitted

The timers came from Precision timer company (Find on the web)
The main burner control timer (heat control) is a series 646 and the one shot timer is a series 644

These are not expensive and will be made to suit at the time of the order.

120 volt input/output solid state and are about 2 inches square and about 3/4 inch high.

The main timer I used has a pot on the controller to set the feed motor on time (1.5 to 2 seconds) and the off time (heat range) is controlled using a remote panel mounted pot and can vary from 2 seconds off up to 10 seconds off.

Most all of the original stove components such as feed motor, fans and such including the safety snap switches (low temp and high temp) can be reused from the original parts.

The snap switches are a universal item and can be purchased in various temps to suit the need.

The speed of the convection fan can be controlled using a standard CassaBlanca fan speed controller that is available from the hardware store.

These are a basic Triac with a round Knob to control the speed.

This is a very simple control setup, and will work fine for many of the older stoves that have become a parts orphan.

Hope this helps

Snowy

Click to expand...

Snowy.
I am going to use your old stove wiring diagram and components from precision timer etc etc as posted.... Im so over my Breckwell issue Ive been trying to resolve, when I initially read your post it was like reading russian to me. But now after some learning of elec diagrams Im going to see this as a godsend.
I may be asking a question or two during the process of getting my stove running finally...
Regards
PW

Snowy Rivers, thank you for the diagram...I had been looking for a timer relay .

Can you post a picture of a control module that you built? Thanks

Snowy Rivers,

I have the old NPS-1000 that was put out by Country Flame, and I absolutely can not find parts. Is there a control board that is universal or will work even with a new harness?

Welcome to the forum Poetchaser! May not get an immediate response from Snowy as forum members are shutting down stoves and moving outside.

Snowy Rivers said:

Here is a copy of a schematic that I have used to rewire a couple older Pellet stoves.

Had a member ask about it, so here it is for all to use.

Things can be tweeked a little here and there to suit the specifics of the stove being retro fitted

The timers came from Precision timer company (Find on the web)
The main burner control timer (heat control) is a series 646 and the one shot timer is a series 644

These are not expensive and will be made to suit at the time of the order.

120 volt input/output solid state and are about 2 inches square and about 3/4 inch high.

The main timer I used has a pot on the controller to set the feed motor on time (1.5 to 2 seconds) and the off time (heat range) is controlled using a remote panel mounted pot and can vary from 2 seconds off up to 10 seconds off.

Most all of the original stove components such as feed motor, fans and such including the safety snap switches (low temp and high temp) can be reused from the original parts.

The snap switches are a universal item and can be purchased in various temps to suit the need.

The speed of the convection fan can be controlled using a standard CassaBlanca fan speed controller that is available from the hardware store.

These are a basic Triac with a round Knob to control the speed.

This is a very simple control setup, and will work fine for many of the older stoves that have become a parts orphan.

Hope this helps

Snowy

Click to expand...

Snowy,
I am trying to locate the precision timer company you mentioned in your post but am having a hard time finding the company and exact series of timers that you mention. do you have a link you could send? I have an old country flame pellet stove and the motor timer for the auger has issues. the auger just runs continuously. I have had no luck in finding any replacement parts for this unit as it was manufactured in 1992. Any help you can provide is greatly appreciated.

country flame owner said:

Snowy,

Click to expand...

Try sending her a PM....

Old thread I know. Newb here.

I have a older but nice Enviro Mini that purrs like a kitten....when it runs. In the past 5 years I've had to buy 2 new mother boards at 350 bucks a pop. No more.

I stumbled upon this forum and would like to do the modifications posted by the OP.

OP quoted :"The main burner control timer (heat control) is a series 646 and the one shot timer is a series 644"

QUESTIONS

1. Why 2 timers? I thought only one was needed to run the auger motor? I'm also unclear to what the "main control burner timer" is and the "one shot timer"

2. Can anyone post a link or pic of the proper snap switches to use?

========================================

for anyone else interested here's the link for the timers:

http://www.precisiontimer.com/refre...d=1004&catInfoId=1051&ItemDescription=644A-F6

http://www.precisiontimer.com/refre...=1136&catInfoId=1056&ItemDescription=646A-1E6

Snowyrivers doesn’t come here much anymore that i know of. You can use her schematic and modify it for your own stove hers may have had 2 augers I don’t know.

Thanks, and yes that's possible that she has 2 augers.

I can easily run my combustion (draft) blower and convection blower with simple rotary fan switches but I need a good reliable timer to dial in the auger feed rate. And of course wire in the safety snaps. I tried running the auger feed with a fan switch but it's just too finicky. It'll feed pretty steady for a while but then hiccup and go up or down on it's own.

Auger needs a timed seconds on - seconds off. And usually its fractions on lower heat settings. Search the forums for diy controls

Thanks ! Once I work this out, this will be a sweet set-up.

found it:

These folks have just the right stuff

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0CB4QFjAA&url=http://www.infitec.com/&ei=XvyvVLjFIY3ZoASkn4DAAg&usg=AFQjCNGM5cbpHO36-Gtt4MEj542aEHCWjQ

Part way down the page, click on alphabetical listing.

Go to HTRS

HTRS
120 VOLT
10 AMP
ON TIME FIRST ( .1--3 SECONDS)
Adjustment on the timer for the on time (set at optimal during startup)
This adjustment should not be accessible outside the stove)


OFF TIME SECOND (.5--15 SECONDS)
Remote adjustment with 2 terminals on timer
Accessible on the panel as heat range

The ordering code is all easy to write out

HTRS 5 B 0D 1 1A 2

The pdf sheet gives all the tech stuff

Use a multiple position rotary switch wired through a bank of resistors

The timer uses 1 megohm as the max time resistance.

I used a 3 position switch (LOW MED HIGH)
1 MEGOHM ---LOW
799 K OHM----MED
499K OHM----HIGH

1 MEG IS 10 SECONDS
799K IS 7.99 SECONDS
499K IS 4.99 SECONDS

You can pick and pick and chose your resistors for what you need.

I used off the shelf stuff

1/4 watt minimum on the resistor (per the companies specs)

Very basic stuff

A standard 5 amp Triac fan speed control will do the deed for the room fan.

Run the exhaust/draft fan line voltage (should do fine)

Some stoves vary the draft fan speed a tad, but generally not needed)


The stove companies used to use these types of controls, but went to proprietary boards to keep the $$$$$ in their pocket

keep your safety snaps, room air snaps and any other safety equipment all intact to keep the stove safe.

This system works sweet, and is robust.