Operational Flow-Chart - Aqua-Hot 400 Series Service Manual

Chart 1
"Burner" Switch
Turned ON
Burner heat source select-
ed by Burner Switch
Burner fires into the Combus-
tion Chamber, which heats the
antifreeze and water heating
solution in the Boiler Tank.
NOTE: The Burner and/
or Electric Heating Ele-
ment (as switched ON)
will automatically begin
reheating the antifreeze
and water heating solu-
tion when the Boiler
Tank drops below 155°F
The cooled antifreeze
and water heating solu-
tion is returned to the
Boiler Tank to be reheat-
ed
Heat is transferred into
the Zone calling for heat
Antifreeze and water
heating solution moves
through the Heat Ex-
changers in the Zone
calling for heat
Heat Source is selected from
the Interior Switch Panel
Boiler Tank heats to
185°F
Interior Zone Thermo-
stat calls for heat
The circulation Pump acti-
vates for the Zone which
called for heat. The heat-
ed antifreeze and water
heating solution is trans-
ported throughout the
plumbing lines in that
zone
Heat Exchanger fans acti-
vate
NOTE: The circulation
pumps and heat exchang-
ers will not operate until
the Boiler Tank reaches a
minimum of 150°F
© Aqua-Hot® AHE-400-P01 Service Manual Rev.B June 2014
Section #: Title
Aqua-Hot Overview
"Electric Element"
Switch Turned ON
Electric Heating Element heat source
selected by Electric Element Switch
Electric Heating Element
activates, which heats the
antifreeze and water heating
solution in the Boiler Tank.
A hot water faucet (e.g., kitchen
sink, shower, etc.) calls for hot
water.
Heat is transferred to the Do-
mestic Water System
Hot Water Flows from
the water faucet
p.
13