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SEQUENCE OF OPERATION:A-6 CIRCUIT COLD TANK STARTUP
Note:
The operation
sequence at right only
applies to the initial
cold tank start. On
successive cycles cold
water entering the tank
is forced to the bottom
by the dip tube. The
lower
element
is
usually energized first
on
successive
hot
water draws as cold
water enters the tank.
In most water heater
applications the lower
element and the lower
thermostat
do
over
90%
of
the
water
heating job.
The upper element is
only energized again
when the entire tank is
cold and the upper
thermostat
calls
for
heat.
If the upper element
burns out, the upper
thermostat call for heat
will never be satisfied
and power will not be
transferred
to
the
bottom thermostat and
element.
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Technical Training Department
Ashland City, Tennessee ©2004
RESIDENTIAL ELECTRIC WATER HEATER
SERVICE HANDBOOK
17 of 36
Residential Electric Svc Handbook
STC082
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