Improper Combustion; Gas; When Servicing The Water Heater; Water Quality - Westinghouse WGRTNG199 Nstallation & Maintenance Manual

Residential tankless water heater
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NOTE: When inquiring about service or troubleshooting, reference the model and serial numbers from the water heater rating label.
DO NOT USE THIS APPLIANCE IF ANY PART HAS BEEN SUBMERGED IN WATER. Immediately call a qualified service technician.
The appliance MUST BE replaced if it has been submerged. Attempting to operate an appliance that has been submerged could create
numerous harmful conditions, such as a potential gas leakage causing a fire and/or explosion, or the release of mold, bacteria, or other
harmful particulates into the air. Operating a previously submerged appliance could result in property damage, severe personal injury,
or death.
NOTE: Appliance damage due to flood or submersion is considered an Act of God, and IS NOT covered under product warranty.
Be sure to disconnect electrical power before opening water heater cabinet or performing service. Label all wires while performing
service to ensure proper re-wiring of the water heater. Wiring errors can cause improper or dangerous operation. Failure to do so could
result in an electrical shock, improper water heater operation, property damage, serious personal injury, or death.
C. IMPROPER COMBUSTION
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 personal injury, or death.
D. 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.
E. 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.
F. 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 contaminants 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
use of the water heater and contact an authorized technician or licensed professional.
Contaminant
Total Hardness
Total Dissolved Solids (TDS)
Table 2 – Water Quality Specifications
G. FREEZE PROTECTION
Consider water heater piping and installation when determining water heater location.
NOTE: Damages resulting from incorrect installation or from use of products not approved by Westinghouse ARE NOT covered by
warranty.
Aluminum
Chloride
Copper
Iron
Manganese
pH
Sulfate
Zinc
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
0.05 mg/l
6.5-8.5
205 mg/l
500 mg/l
205 mg/l
WHL-004 REV. 12.17.14
8

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