0906-E
11
CHANGE OVER – REVERSIBLE UNITS
Function
For reversible units only. this allows the reversible units to change automatically from winter to summer
operation.
Description
This function will change the unit from production of hot water to production of chilled water automatically and
can be set up with following set points:
3311 ! Change over mode according to following values
Cool. Only ! cooling only
Heat. Only ! heating only
Auto. ! Automatic change over - pumps are running in dead zone
Auto. Stop ! Automatic change over – pumps are stopped in dead zone
3312 ! Change over winter setting
The set point 3312 is the outside air temperature under which the unit will operate as a heat pump.
3313 ! Change over summer setting
The set point 3313 is the outside air temperature over which the unit will operate as a chiller.
Example:
3312 = 12°C
3313 = 23°C
Outside air tem