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IX. Hydronic Piping (continued)
D. Water Quality
1. The water directly in contact with the appliance
must meet the requirements in Table 20. Failure to
adhere to the water treatment requirements in this
manual can cause damage not covered by warranty
to the appliance, pumps, or other components in
the system.
2. It will be necessary to gain knowledge of the
impurities dissolved in the water and consult with
a qualified industrial water treatment professional
to establish a treatment plan. In addition, a periodic
testing/sampling plan should be developed.
3. To minimize corrosion and scale effects, adhere to
the water quality requirements in Table 20.
a. If the water hardness is higher than 205 ppm (12
gpg), a water softener must be used.
b. Water with a hardness of less than 80 ppm (5 gpg)
can have a pH level that is corrosive.
4. Total Dissolved Solids (TDS) contribute to scale
buildup. If the TDS or combined water hardness
and TDS exceeds 450 ppm, the water needs to be
heated indirectly.
CAUTION
CAUTION
The AMP heat exchanger is made from stainless steel
tubular double coil having relatively narrow waterways.
Once filled with water, it will be subject to the effects
of corrosion. Failure to take the following precautions
to minimize corrosion, and overheating could result in
severe product damage.
Before connecting the appliance, insure the system is
free of impurities, grease, sediment, construction dust,
sand copper dust, and flux. Flush the system thoroughly
and repeatedly, if needed.
Scale deposit is made up of lime scale contained in most
distributed water and settles over the warmest surfaces
of the heat exchanger causing subsequent overheating
and eventual failure.
Scale can form from high water hardness and slow water
velocities. Failure to maintain the recommended water
hardness and flow rate will result in a buildup of scale
inside the heat exchanger.
Water temperatures over 140 °F (60 °C) greatly increase
the affects of corrosive chemicals.
Chlorine and Chloride have different levels of corrosion
effects on stainless steel. It is recommended for chlorine
(Cl2) levels to be below 5ppm and chloride (Cl
be below 150 ppm for 316 stainless steel.
AMP 400-1000L I&O Manual
Table 19: Absolute Water Flow Rates
AMP Model
400
500
650
800
1000L
NOTICE: This table represents the
absolute max and min flow rates allowed
and shall not be used to design the system
or size the circulator.
Table 20: Water Quality Requirements
Quality Parameter
Water Hardness (ppm)
Total Dissolved Solids (ppm)
Chlorine (ppm)
Chloride (ppm)
Notes:
The combined water hardness and TDS cannot
exceed 450 ppm.
1 grain per gallon = 17.1 ppm
a. The TDS (in ppm) is determined by measuring the
electrical conductivity (µS/cm) of the water and
multiplying by a conversion factor (typically 0.65
for drinking water).
5. Chlorine and Chloride can be very corrosive to
stainless steel. Ensure the level of chlorine is less
than 5 ppm and the level of chloride is less than
150 ppm.
The AMP is not designed for the heating of swimming
pool water.
6. Before connecting the appliance, insure the system
is free of impurities, grease, sediment, construction
dust, and any other contaminants.
a. Flush the system thoroughly and repeatedly, if
needed.
) levels to
-
Max Flow
(GPM)
300
Min.
pH (cold)
WARNING
WARNING
Min Flow
(GPM)
12
12
20
20
20
Max.
80
205
100
450
-
5
-
150
6.5
7.5
39
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