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B. IMPROPER COMBUSTION
WARNING
C. GAS
Should overheating or gas supply fail to shut off, do not turn off or disconnect electrical supply to the
circulator. Instead, shut off the gas supply at a location external to the appliance.
D. WHEN SERVICING THE WATER HEATER
•
To avoid electric shock, disconnect electrical supply before performing maintenance.
•
To avoid severe burns, allow water heater to cool.
•
Do not use petroleum-based cleaning or sealing compounds in a water heater system. Gaskets and seals in
the system may be damaged, possibly resulting in substantial property damage.
•
Do not use "homemade cures" or "patent medicines". Substantial property damage, damage to water-
heater, and/or serious personal injury may result.
•
Always verify proper operation after servicing the water heater.
E. WATER QUALITY
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 Table 2. If your water contains con-
taminants higher than outlined by EPA, then water treatment is recommended and additional maintenance may
be required. If you suspect that your water is contaminated in any way, discontinue the use of the water heater
and contact an authorized technician or licensed professional.
Contaminant
Total Hardness
Aluminum
Chloride
Copper
Iron
Table 2 – Water Quality Specifications
F. FREEZE PROTECTION
CAUTION
NOTE: Damages resulting from incorrect installation or from use of products not approved
by American Standard Water Heaters ARE NOT covered by warranty.
Do not obstruct the flow of combustion and ventilating air. Adequate air must
be provided for safe operation. Failure to keep the exhaust vent and intake pipe
clear of ice, snow, or other debris could result in property damage, serious per-
sonal injury, or death.
Maximum Allowable Level
200 mg/l (12 grains/gallon)
0.05 to 0.2 mg/l
250 mg/l
1 mg/l
0.3 mg/l
Consider water heater piping and installation when determining
water heater location.
Contaminant
Manganese
pH
Sulfate
Total Dissolved Solids (TDS)
Zinc
Maximum Allowable Level
0.05 mg/l
6.5-8.5
205 mg/l
500 mg/l
205 mg/l
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