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3. Dip the pH test strip from the test kit in the water
sample. Shake excess water off the test strip.
Compare the color of the test strip to the chart
provided to determine pH level. The pH of the water
should now be between 8.0 and 9.5.
4. Rinse and fill the sample tube to the 25 mL mark
with treated water from the outdoor furnace.
5. Add 25 drops of Sulfuric Acid (p/n 404) to the water
sample and swirl to mix.
WARNING
Sulfuric Acid is a corrosive acid. Handle carefully.
Carefully read and follow precautions on test
chemical labels. Keep test chemicals away from
children. Safely dispose of tested samples.
6. Using the dropper, add Permanganate Reagent
(p/n 403) one drop at a time, swirling the water and
counting each drop, until the color changes from
colorless to pink, and stays pink for at least one
minute.
NOTE: Always hold the dropper in a vertical
position to ensure proper droplet size.
7. If the nitrite level is not at least 20 drops by nitrite
test, add 1/2 unit of Corrosion Inhibitor Plus™ (p/n
1650); then circulate water for 24 hours and repeat
procedure, as needed, to achieve a nitrite level of at
least 20 drops by nitrite test.
8. Do not exceed treatment of higher than 30 drops by
the nitrite test. If the test requires more than 30 drops,
dilute the water by draining water from the system
until the water level just reaches the bottom of the
sight gauge. Then perform steps 2-3 from Corrosion
Inhibitor Plus™ and Initial Treatment and steps 1-9
from Testing Treated Water in the Outdoor Furnace.
CAUTION
Completely clean out the firebox before draining
water from the outdoor furnace.
9. After the proper nitrite level has been obtained,
check pH to make sure it is between 8 and 9.5.
After initial treatment, the maintenance nitrite level
target is 15 drops by nitrite test, but 15 to 30 drops is
acceptable. One drop of permanganate reagent equals
approximately 100 ppm.
System Maintenance
The pH and nitrite levels of the water, once treated,
should remain stable as long as water is not added to
the outdoor furnace. If water is added to the outdoor
furnace and/or system, the system water should be
tested and Corrosion Inhibitor Plus™ should be added
(if necessary) to maintain the recommended level of
protection.
40
NOTE: If there is a leak in the system or if the
outdoor furnace loses water from boiling
frequently, the problem should be identified and
repaired immediately. Under normal operation,
little or no water needs to be added. Adding
water to the furnace may cause corrosion if not
immediately treated with Corrosion Inhibitor
Plus™ to the proper pH and nitrite levels. In
addition, the amount of dissolved solids in the
system (due to adding additional water) can
cause problems.
After the initial three months of operation and every
six months thereafter, the pH and nitrite levels of the
system water should be tested. These levels should be
maintained as previously stated.
POST HEATING SEASON MAINTENANCE
The water should be left in the outdoor furnace if the
outdoor furnace is not being used for an extended period
of time. Check pH and nitrite levels as described in the
Water Quality and Maintenance section.
1. At the end of the heating season, clean all the ashes
out of the outdoor furnace. Scrape the walls and
floor of the firebox taking special care to clean at the
ash line and below, especially in the corners.
2. Check behind the baffle and in the chimney flue.
Clean out any excessive buildup. Any large or dry
crusty deposits on the walls, baffle or heat exchanger
area should be removed. A thin, tar-like coating
of creosote above the ash line does not need to be
scraped clean as it works like a protective coating
on the metal. When cleaning the firebox, be sure to
wear the appropriate personal protective gear.
3. When the furnace is clean, carefully inspect the
firebox for any signs of excessive corrosion or
deterioration. If any corrosion or deterioration is
found, call your dealer. It is always better to do
maintenance during the non-heating season.
4. After the inspection is completed, apply a thin coat
of new motor oil to the firebox being sure to work oil
into all corners.
5. Place a cover over the chimney to keep rain from
entering the outdoor furnace. Clean and oil the
chimney flue to the firebox.
Flushing the System
If the system water is brown or orange, it is an indication
the Corrosion Inhibitor Plus™ level has not been
maintained and corrosion is present in the water jacket.
The water jacket should be thoroughly flushed and the
system refilled with the proper amount of Corrosion
Inhibitor Plus added. Be sure to test the system water to
verifiy the proper amount of Corrosion Inhibitor Plus.
Section 3 - Maintenance Instructions
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