LP-605 Rev. 000 Rel. 009 Date 8.16.18
6
B. Improper Combustion
Do not obstruct the ow of combustion and ventilating air. Adequate
air is necessary for safe operation. Failure to keep the exhaust vent
and combustion air intake clear of ice, snow, or other debris could
result in property damage, serious personal injury, or death.
C. Gas
Should overheating or gas supply fail to shut o, turn o the manual
gas control valve to the water heater.
D. When Servicing the Water Heating System
• To avoid electric shock, disconnect electrical supply before
performing maintenance.
• To avoid severe burns, allow water heater and associated
equipment to cool before servicing.
• Do not use petroleum-based cleaning or sealing compounds
in a water heating system. Gaskets and seals in the system may
be damaged. This can result in substantial property damage.
• Do not use “homemade cures” or “patent medicines”. Damage
to the water heater, substantial property damage, and/or
serious personal injury may result.
• Always verify proper operation after servicing the water heater.
NOTE: When inquiring about service or troubleshooting, reference the
model and serial numbers from the water heater rating label.
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.
E. Water Chemistry Requirements
Chemical imbalance of the water supply may aect eciency and
cause severe damage to the appliance and associated equipment.
Water quality must be professionally analyzed to determine whether
it is necessary to treat the water. Various solutions are available to
adjust water quality. Adverse water quality will aect the reliability
of the system. In addition, operating temperatures above 135
o
F will
accelerate the build-up of lime scale and possibly shorten appliance
service life. Failure of an appliance due to lime scale build-up, low pH,
or other chemical imbalance IS NOT covered by the warranty.
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 dened as drinkable water supplied from
When installing the drain valve take care not to overtighten it. Doing
so could result in damage to the water heater and property damage
due to leaks. Such damages ARE NOT covered by warranty.
Contaminant Maximum Allowable Level
Total Hardness
(Residential Use - Below 140
o
F
water temperature)
200 mg/l
(12 grains/gallon)
Total Hardness
(Commercial Use - Above 140
o
F
water temperature)
120 mg/l
(7 grains/gallon)
Aluminum 0.05 to 0.2 mg/l or PPM
Chloride 100 mg/l or PPM
Copper 1 mg/l or PPM
Iron 0.3 mg/l or PPM
Manganese 0.05 mg/l or PPM
pH 6.5 - 8.5
Sulfate 205 mg/l or PPM
Total Dissolved Solids (TDS) 500 mg/l or PPM
Zinc 5 mg/l or PPM
Dissolved Carbon Dioxide (CO2) 15 mg/l or PPM
Table 1 - Water Quality Specications
F. Freeze Protection
Consider piping and installation when determining heater
location. Damages resulting from incorrect installation or from use
of products not approved by HTP ARE NOT covered by warranty.
NEVER use any toxic chemical, including automotive, standard
glycol antifreeze, or ethylene glycol made for hydronic (non-
potable) systems. These chemicals can attack gaskets and seals in
water systems, are poisonous if consumed, and can cause personal
injury or death.
NOTE: Damages resulting from incorrect installation or from use of
products not approved by HTP ARE NOT covered by warranty.
G. Water Temperature Adjustment and Scalding
This water heater can deliver scalding water. Be careful whenever
using hot water to avoid scalding injury. Certain appliances such as
dishwashers and automatic clothes washers may require increased
water temperatures. By setting the thermostat on this heater
to obtain the increased water temperature required by these
appliances you may create the potential for scald injury.
To protect against injury, install a mixing valve in the water system.
This valve will reduce point of use discharge temperatures by mixing
cold and hot water in branch supply lines. Such valves are available
from your local plumbing supplier.
Table 2 details the relationship of water temperature and time with
regard to scald injury and may be used as a guide in determining the
safest water temperature for your applications.
utility or well water in compliance with EPA secondary maximum
contaminant levels (40 CFR Part 143.3). 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.
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