Filter
Top Products
7
cool to room temperature, or if tank is drained
without opening a hot water faucet. A Watts
®
Model No. N36 is an appropriate vacuum relief
valve.
4. Thermal Expansion Tank If water heater is
installed in a closed water supply system, such as
one having a back-flow preventer in the cold water
line, provide thermal expansion control. Contact
the water supplier or local plumbing inspector for
additional information. An Amtrol Model ST-12 is
an appropriate diaphragm style thermal expansion
tank for most installations.
F. Removal of Existing Domestic Water
Heating System
1. External Tankless Heater - Disconnect from
boiler piping and domestic water system.
2. Tankless and Storage Heaters - Disconnect from
domestic water system. Heater does not need to be
removed from boiler. If left in place, do not plug
inlet and outlet tappings.
G. Water Quality Improper water quality will reduce
the expected life of the Alliance™ water heater. Hard
water, sediment, high or low water Ph, and high levels
of chlorides in the domestic water should be avoided.
Sediment and hard water will coat the water heater coil
surfaces and reduce the rating of the water heater and
may, eventually, cause a failure. High or low Ph and/
or high chloride concentrations will cause the stainless
steel water heater components to corrode and
eventually fail. A filter is strongly recommended
where sediment is present in the water. A water
softening system is recommended for areas with hard
water.
In areas where water quality is unknown, a water
quality test should be performed.
WARNING
Do not operate ALLIANCE™ water heater in areas where water Ph is above 8.0 or below 6.0,
and/or with chloride concentrations greater than 80 parts per million (ppm). Burnham's Standard
Warranty does not cover problems caused by improper water Ph or excessive levels of chlorides.