Westinghouse 220VWH Manual page 13

The water must be potable, free of corrosive chemicals, sand,
dirt, and other contaminates. It is up to the installer to ensure the
water does not contain corrosive chemicals or elements that can
damage the heat exchanger. Potable water is defined as drinkable
water supplied from utility or well water in compliance with EPA
secondary maximum contaminant levels (40 CFR Part 143.3) as
shown in the table below. If the water contains contaminants higher
than outlined by the EPA, water treatment is recommended and
additional, more frequent maintenance may be required.
If you suspect that your water is contaminated in any way,
discontinue use of the appliance and contact an authorized
technician or licensed professional.
Maximum
Contaminant Allowable
Level
Total Hardness
(Commercial
120 mg/l
o
Use - 140 F and
(7 grains/gallon)
above water
temperature)
Aluminum 0.05 to 0.2 mg/l
Chloride 100 mg/l
Copper 1 mg/l
Iron 0.3 mg/l
Manganese 0.05 mg/l
Table 4 - Water Quality Specifications
*NOTE: It is recommended to clean heat exchanger at least once
a year to prevent lime scale buildup. Follow the maintenance
procedure in the Maintenance Section of this manual to clean the
heat exchanger.
Maximum
Contami-
Allowable
nant
Level
pH 6.5-8.5
Sulfate 205 mg/l
Total
Dissolved 500 mg/l
Solids (TDS)
Zinc 5 mg/l
Dissolved
15 mg/l or
Carbon
PPM
Dioxide (CO2)
WHL-053 Rev. 00 Rel. 003 Date 7.21.17
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