HARDY MANUFACTURING CO., INC (MODEL KB165) PAGE 23
7-8
Air Volume Box
The air volume box contains the upper & lower air tube dampers. These dampers
control the amount of air and distributes the air where it is needed for a proper burn.
7-9 Low Water Float
The low water float signals a low water condition in the Temperature Logic Controller.
The heater will not operate if a low water condition exists.
7-10 Temperature Logic Controller
The Temperature Logic Controller monitors water temperature as well as water level of
the heater.
7-11 Low Water Lockout Relay
The low water lockout relay turns all combustion systems off until the heater fills with
water.
7-12 Timer (delay on break)
When the Temperature Logic Controller satisfies or the control switch is switched off it
begins timing. This prevents short cycling of the unit.
7-13 Time Delay Relay
The time delay relay is energized by the timer. It turns off the control power to draft
dampers and the blower.
Summary of Contents for KB165
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