51
Water Quality Guidelines
Carrier does not accept responsibility when the water used
in the system is not within the recommended parameters,
in which case the equipment warranty will be void. Water
outside the parameters can cause leaks and consequent
water freezing of evaporator water.
ATTENTION
CONDITIONS
ACCEPTABLE LEVEL
pH
Within a range of 7 to 9 for copper. In a range from 5 to
9, nickel-copper pipes can be used.
Total
hardness
Calcium and magnesium carbonate should not exceed
20 grains per gallon (350 ppm).
Iron oxide
Less than 1 ppm.
Iron bacteries
None admissible
Corrosion*
Maximum
level
Coaxial
metal
Ammonia
Ammonia Hydroxide
0.5 ppm
Cu
Ammonium Chloride,
Ammonium Nitrate
0.5 ppm
Cu
Ammonia Sulphate
0.5 ppm
Cu
Chlorine / Chlorides
0.5 ppm
CuNi
Hydrogen Sulfi de **
None
admissible
—
Brackish and
salty
Use a nickel-copper heat exchanger when the
concentrations of calcium (or sodium chloride)
greater than 125 ppm are present.
(Sea water is approximately 25,000 ppm.)
* If the concentration of these corrosive substances exceeds the
maximum level allowed, then there is potential for serious
corrosion problems.
** Sulfides in water oxidize rapidly when exposed to air, requiring
no agitation while the sample is collected. Unless tested
immediately at the site, the sample will require stabilization
with a few drops of a Molar zinc acetate solution, allowing
accurate determination of sulfide within 24 hours of collection.
A low pH and high alkalinity causes problems in the system
even when both values are within the recommended limits.
The term pH refers to the acidity, basicity or neutrality of the
water supply. Lower than 7.0 water is considered acid. Above
7.0 water is considered basic. Neutral Water has a pH of 7.0.
NOTE: To convert ppm to grains per gallon, divide by 17.
Hardness in mg/l is equivalent to ppm.
The water should be within design fl ow limits, clean and
treated to ensure correct machine performance and
reduce potential damage to pipes due to corrosion,
crusts, erosion, and seaweed. Carrier does not accept any
liability for damages to the evaporator resulting from
untreated or otherwise treated water.
CAUTION
6.5 - Routine Cleaning of Coil Surfaces
It is essential that the monthly cleaning with Totaline® eco-
friendly cleaners is carried out to prolong coil life. This cleaner
is available in the Carrier service division with code P902-0301
for a one gallon container, and code P902-0305 for fi ve gallon
containers. It is recommended that all coils be cleaned with
the Totaline eco-friendly cleaner as described below. Cleaning
of the coil should be part of the unit’s regular scheduled
maintenance procedures to ensure long life to the coil.
Failure to comply with cleaning recommendations will result
in reduction of durability in the environment. Avoid using:
• Coil
polishers
•
Acid cleaning before painting
• High-pressure
washers
•
Low quality water for cleaning
Totaline eco-friendly coil cleaner is non-fl ammable,
hypoallergenic, anti-bactericidal and considered a
biodegradable agent, and will not harm the coil or
components around it, such as electrical wiring, painted
metal surfaces, or insulation. The use of non-recommended
coil cleaners is strongly discouraged as they may aff ect the life
of the coil and the unit.
Aggressive chemicals, household bleach, acids or basic
cleaners of any kind should not be used to clean internal
and external coils of any kind. It can be very diffi
cult to
remove by rinsing these products from the coil and they
can accelerate corrosion at the fi n / pipe interface where
varied materials are in contact. If there is dirt below the
coil surface, use the Totaline eco-friendly coil cleaner as
described above.
CAUTION
Never use high speed water from a high-pressure
washer, garden hose or compressed air to clean a coil.
The force of the air or water jet will bend the ends of the
fins and increase the pressure drop on the side of the
air. Unit performance reduction or inconvenient unit
shutdown may occur.
CAUTION
Instructions for Application of Totaline Green Serpentine
Cleaner:
1. It is recommended to wear appropriate eye protection
with safety goggles during mixing and application.
2. Remove any dirt and grime from the surface with a vacuum
cleaner as described above.
3. Thoroughly wet the fi nned surfaces with clean water and a
low speed garden hose, being careful not to bend the fi ns.
4.
Mix Totaline eco-friendly coil cleaner in a 2.1/2-gallon
garden sprinkler according to the instructions included
with the cleaner. The ideal solution temperature is 100°F.