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It is strongly recommended that you follow the procedure provided below at the end of each heating season.  Corrosion is preventable as long as you follow the manufacturer's guidelines and clean your furnace regularly.  Corrosion is not covered under the manufacturer's warranty, so here is what you can do to help take care of your investment.
1. Prior to starting your shut down procedures, collect water sample and send it to Heat Smart Plus Inc, or an approved testing location. Allow three to four weeks to receive results.

2. Use the cleanout tool provided to scrape out the reverse turn heat exchanger. The easiest way to clean the heat exchanger is to open the front heat exchanger door and use the supplied cleaning tool to pull all of the ashes on the right side of the heat exchanger down to the front and the push them up the left side of the heat exchanger and into the heat exchanger opening at the back so that the ashes fall back down into the fire chamber.

3. Coat the inside of the heat exchanger with light weight oil, it is also recommended to oil the door hinges and latches.

4. Remove all ash and unburned wood from the fire chamber. NOTE: Ash combined with moisture becomes acidic if left for an extended period of time.

5. Coat the fire chamber with oil, avoid getting oil onto refractory cement and bricks.

6. Remove all ash from the ash collection area.

7. Remove the blower fan, clean the screen, cage wheel and air box assembly. Clean and lube the flapper assembly. Inspect & clean the flex hose and replace if necessary.

8. Check all fittings for leaks once boiler water has cooled down and repair/ replace as required. After shut down procedures are completed, continue to check fittings for leaks monthly. NOTE: Some fittings will leak when cooled.

9. Check your door gaskets and float - do they need replacing? Best to order then in the spring rather than wait until you need to use the furnace again in the fall.

10. Make sure the chimney is covered. ( A clean five gallon pail over the chimney works well.)

11. It is recommended to keep your circulation pump running year round. This will assist in preventing any sediment for settling, and to keep the chemical emulsified in your boiler solution. It will also assist in keeping your pump(s) lubricated to avoid a pump seizure.

12. Add boiler treatment, if previous water test results ( as listed in point #1) indicated further boiler treatment is required. Use only Portage and Main approved Boiler Treatment, as required by your warranty. Do not mix with other brands of boiler treatment.

13. Top off the boiler with water so that there is no air space in the water jacket.

14. At the start of the next heating season, the excess boiler water should be drained off before heating the boiler. It should be kept for use as " top up" water as needed.

15. Consider next heating season's wood fuel

16. Burning dry seasoned wood, reduces acidity that in-turn can cause corrosion. Now is an excellent time to harvest or resource wood for next heating season. Wood can/should be seasoning all spring/summer. Some wood types ie; Oak, require two season to seaon thoroughly.