Central Boiler MaXIM M255 P, Руководство пользователя

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49
Section 9 - Routine Maintenance
3. If the pH level is between 6.5 and 8 and there are
no other known water quality problems, then the
outdoor furnace may be filled with this water.
4. If the water to be used to fill the outdoor furnace has
a pH level of less than 6.5 or greater than 8, a sample
of the water should be sent to a water quality test
lab for recommended treatment, the water should
be conditioned, or water should be supplied from a
different source.
Corrosion Inhibitor Plus™ and Initial
Treatment
Central Boiler Corrosion Inhibitor Plus™ (p/n 1650)
gives optimum protection when it is used to initially
treat the water and is then maintained at proper levels.
The initial nitrite level target is 20 drops by nitrite
test, but 20 to 30 drops is acceptable. Do not exceed
treatment of higher than 30 drops by nitrite test.
The recommended initial treatment rate for the outdoor
furnace is specified by units. One unit of the Corrosion
Inhibitor Plus™ is a 1-gallon (3.78-liter) container. The
normal rate for the initial treatment is 1/2 of a unit.
NOTE: If the system has a larger than normal
water capacity, more Corrosion Inhibitor Plus™
should be added at a recommended amount of
one unit per 180 gallons (680 liters) of water.
Refer to Section 7 - Filling System with Water and
Purging Air for the recommended initial treatment of
Corrosion Inhibitor Plus™.
Obtaining Treated Water Sample
A treated water sample from the outdoor furnace can be
obtained either from the valve on the hot water heater
(Fig. 69) or from the furnace drain valve (Fig. 70).
Fig. 69
Valve can be used
to obtain sample of
treated water from
furnace.
Fig. 70
Before collecting the sample, drain about a quart (liter)
of water; then carefully fill the sample container without
contaminating the sample. Be sure to properly close
the valve when finished.
Testing Treated Water in the Outdoor
Furnace
1. If no antifreeze is present in the water, use Test Kit
(p/n 405). If antifreeze has been added to the water,
use Test Kit (p/n 597).
2. 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.
3. Rinse and fill the sample tube to the 25 mL mark
with treated water from the outdoor furnace.
4. 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.
5. 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 that persists for at least one minute.
NOTE: Always hold the dropper in a vertical
position to ensure proper droplet size.
6. If the nitrite level is not at least 20 drops by nitrite
test, add 1/4 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.