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All wiring must be done in accordance with Na‐
�onal, State and local codes. Adhere to the Na‐
�onal Electric Code ‐ ANSI/NFPA 70‐1990 in the
absence of any other codes.
Power must be shut off before installing or servic‐
ing the heater. A separate shut off switch should
be installed to support future servicing or an
emergency shutdown. The en�re hea�ng system
should have its own designated electrical circuit.
The Techtanium heater operates in much the
same way as an addi�onal hea�ng zone, either
u�lizing the same circulator as household hea�ng
or its own circulator. The heater temperature is
maintained by the use of an immersion type aq‐
uastat. The aquastat is installed into the im‐
mersion well on the heater.
The aquastat operates in much the same way as a
thermostat. When the temperature falls inside
V Wiring
the tank the set of contacts make (close) and
when the temperature rises the contacts break
(open).
The aquastat should be �ed into the boiler sys‐
tem and controls. When the tank calls for heat the
aquastat contacts close and signal the boiler con‐
trols, allowing the boiler to maintain temperature
and proper opera�on of the tank circulator.
DHT recommends the use of a priority control to
help the boiler maintain desired temperature and
sa�sfy the tank's BTU requirements.
The Techtanium heater recovery ra�ngs are based
on the boiler's ability to maintain 180 degrees
Fahrenheit. It is important that the installer,
plumber or hea�ng technician responsible for
installing the heater, make certain that the
boiler capacity (BTU) is adequate to sa�sfy the
heater's BTU requirements.
Water temperature over 125ºF
can cause severe burns instantly or
death from scalds.
Children, disabled and elderly are at
highest risk of being scalded.
See instruc�on manual before se�ng
temperature at water heater.
bathing or showering.
Temperature limi�ng valves are
available, see manual.
11
Feel water before
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