lp-673 Rev. 000 Rel. 001 Date 8.30.18
6
C. Gas
Should overheating or gas supply fail to shut off, turn off 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 affect efficiency 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 affect 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 defined as drinkable water
supplied from 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. See Table 1.
If you suspect that your water is contaminated in any way, discontinue
use of the appliance and contact an authorized technician or licensed
professional.
Contaminant
Maximum Allowable Level
Total Hardness
(Commercial 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 Specifications
F. Freeze Protection
The water heater control is equipped with freeze protection that
activates based on internal water temperature. See the table below
for details on freeze protection operation.
NOTE:
Freeze protection will not be active if the water heater loses
power.
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.
This water heater is designed to automatically prevent freezing to
temperatures of 5
o
F (-15
o
C). This freeze protection is not effective if
the power fails. In order for freeze protection to operate, the water
heater must be powered at 120 VAC. Additional freeze protection
must be used if the water heater is installed where temperatures
can reach freezing conditions of 5
o
F (-15
o
C) or below.
In addition, the water heater’s freeze prevention devices will not
prevent the external plumbing from freezing. Protect external
plumbing with insulation, heat tape, heaters, solenoids, or pipe
covers. Failure to follow these instructions could result in water
heater failure and substantial property damage.