13
Water Quality:
The quality of water must be taken into consideration when installing and
maintaining the water heater. Water conditions that do not comply with the recommended levels
can damage the water heater. Atmor reserves the right to deny any warranty claim for damage
resulting from water conditions that deviate from the levels specified in the table below.
To prevent damage to the heat exchanger and heating elements, the water must be treated, and
the heater must be flushed regularly when this unit is installed in a location known to have hard
water that causes scale build-up. Atmor recommends the installation of a water treatment device
or water softener to maintain optimal performance of the water heater in hard water areas.
Recommended Water Quality levels
pH
Total
Dissolved
Solid (TDS)
Free
CO2
Total
Hardness
Aluminum Chloride Copper
Iron
Manganese Zinc
6.5
-
8.5
Up to
500
mg/L
Up to
500
mg/L
Up to
200
mg/L
Up to
0.2
mg/L
Up to
250
mg/L
Up to
1.0
mg/L
Up to
0.3
mg/L
Up to
0.05
mg/L
Up
to 5
mg/L
11. Care and Maintenance
To ensure maximum performance of your water heater and to reduce the risk of a water leak, the
following maintenance is recommended:
• The water heater has minimal maintenance requirements. Periodically inspect and test the
heater for signs of damage or failure. Any damage, cracks, leakage or weakness should be
addressed and fixed immediately. Do not over tighten any of the connections. Over tightening
the connection points could cause severe internal damage to the unit.
• Remember that water heated at higher temperatures produces scale buildup much faster
than at lower temperatures. Plumbing connections on the water heater should be inspected
at least once a year for any signs of damage or failure. If the water supply has a high level
of mineralization (hard water), the water heater should be inspected and descaled more
frequently. Installing a manual shut-off on the inlet and outlet of the water heater will allow
access for flushing the unit with a descaling solution.
• Clean the filter on the water inlet pipe once every six months. Wash lightly to remove any
debris..
When any form of maintenance is carried out on the water heater or the home’s plumbing system
that may introduce air into the plumbing, it is crucial to power off the water heater and purge the
air from all pipes before allowing the unit to power up.
FAILURE TO DO SO COULD RESULT IN PERMANENT DAMAGE TO THE HEATING ELEMENT
AND VOID YOUR WARRANTY.
Summary of Contents for AT-910-18TP
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