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On-board Controller Dials
On the right-hand side of the controller board, you will find a series of dials which must be set correctly during
the initial set-up. The dial settings are designed to make the buffer tank, and, in turn, the entire HVAC system
operate as efficiently as possible. The graphic below will help you identify each dial and understand each dial's
function. The dial operations are explained more thoroughly in elsewhere in this manual.
02/22/2012
Mode Dial - Selects the operational mode of the
system. This is dictated by the type of HVAC
components present and active in the system.
Switchover Temp Dial – During the heating
season, this dial determines the outdoor
temperature at which the heat pump is disabled
and the backup heat source takes over. (p. )
Warm Air Dial – When the "Tank Temperature
Dial" on the front of the cabinet is in the "Set Point"
position, this dial determines the set point
temperature. (see below )
Stat Override Timer – This dial starts a timer,
which, at the timer expiration, initiates various
actions based on Mode and outdoor temperature.
Forced Air Priority Jumper – Removal of this
jumper gives priority to the forced air coil over the
heating zones if the stat is not satisfied at the
conclusion of the pre-set time period. (p.)
9
HI114
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