5
The drain line from the relief valve must not be concealed or
blocked and must be protected from freezing.
WARNING: IF THE WATER SUPPLY IS FROM A WELL,
OR KNOWN TO HAVE HARD WATER, IT IS
RECOMMENDED TO USE A PRESSURE RELIEF VALVE
IN THE COLD WATER LINE AS WELL AS A T&P VALVE
IN THE HOT WATER LINE.
No valve of any kind should be installed between the relief
valve and tank or in the drain line.
E. WATER SUPPLY CONNECTIONS
WARNING: Some local codes mandate the use of a
backflow preventer or check valve or pressure-reducing
valve. An adequate expansion tank (or other adequate
means) must be installed to prevent pressure build up or
damage from thermal expansion when a check valve or
backflow preventer or pressure-reducing valve is used.
Failure to do so could result in tank leakage and
therefore void the warranty.
All water supply fittings on this heater are brass
– do not over
tighten or strip threads.
Provide a shut off valve in the cold water line. Mark for future
emergency use.
It is recommended to use unions as per FIGURE 1.
Do not apply heat directly to the cold-water inlet as it includes
a plastic dip tube which will melt.
Water connections are 3/4" male threaded fittings
(Exception: They are 1.5" male on the P80FD and P120FD.)
F. FILLING THE HEATER
CAUTION: Do not put electrical power to the elements
until after the heater is completely filled with water.
Check that the temperature-and-pressure relief valve has
been properly installed
(mandatory requirement).
Completely close the drain valve.
Open the highest hot water faucet to allow air to escape from
piping.
Open the valve to the cold-water inlet and allow the heater
and piping system to completely fill, as indicated by a steady
flow of water from the open faucet.
G. WIRING CONTROLS
WARNING: The heater elements will be damaged
instantly if energy is supplied before the tank is
completely filled with water, thus voiding any warranty.
A qualified electrician must provide a separate fused branch
circuit, conforming to local or National Electric Codes.
Содержание Featherweight Series
Страница 15: ...14 WIRING DIAGRAM 1 ...
Страница 16: ...15 FIGURE 1 ...
Страница 17: ...16 FIGURE 2 ...
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