tekmar 161 Setpoint Control Installation - Manual (Page 20)

© 2007 D 161 - 08/07 20 of 36
Mode of Operation
The hot tub mode of operation can be set to either Heat or Off. While set to Off,
Relay 1 remains off. The Off setting should only be used when the hot tub is drained
or when there is no possibility of freezing. Power should never be removed from the
setpoint control as this will result in an error message on the tN4 system.
Occupied Time
The setpoint control can temporarily override the scheduled temperature and operate
at the occupied temperature on a timer.
Press the Up or Down buttons while in the View menu to set the amount of time
that the occupied temperature should remain in effect.
To use this feature, a programmable schedule must be set or the schedule be set to
normally operate at the unoccupied setting. When the schedule is set to unoccupied,
the setpoint control operates at the unoccupied setting until activated.
Application Mode 3 is designed specifically
to operate a domestic hot water (DHW)
tank using an on/off differential. A sensor
must be located in a temperature well
inside the DHW tank. The DHW tank can
have an occupied temperature setting.
The DHW tank is not heated during the
unoccupied and away periods.
Pressing the UP button while in the VIEW
menu starts operation of the Hot Tub for
the time set.
To Stop operation press the DOWN button
until the time shows OFF.
Application Mode 3 - DHW Tank SECTION C
The length of time the setpoint remains
at the occupied temperature is preset by
the Run Time Occupied item located in
the Scene menu.
To cancel the temporary occupied
time, press and hold the Down button
until the display shows OFF, at which
point, the setpoint control returns to the
schedule.
Relay 1 Operation
Relay 1 operates using an on/off differential to maintain the load at the Occupied
temperature. Relay 1 does not operate during the Unoccupied or Away periods.