High And Low Balance Points; Setting Up The Heat & Cool Off Functions - Smart temp SMT?770 Installer Manual

High and Low balance points
The SMT‐770 is fitted with both High and Low Balance Point control capability.
For these functions to operate the Installer setting must be TT=OA (outside air
temperature sensor fitted), the outside air sensor must be installed and SW1 must be
OFF (Single fan speed mode).
High Balance point.
Set the installer menu value "HB=XX".
When the outside air temperature is above this value, second or third stages of heating
are held off regardless of the room and set temperature.
Set this function is designed to prevent the excessive consumption of energy for
heating when the outside air temperature is warm.
Low Balance point
SW2=on, H3 =EH (Emergency Heat Mode) Set the installer menu value "LB=XX".
When the outside air temperature is below this value the SMT‐770 will automatically
switch to emergency heat mode when heating is required. If the outside temperature is
above this LB=XX value the emergency heat mode can be selected manually at anytime
with the "MODE" button.
Setting up the Heat & Cool Off functions
To conserve energy, the SMT‐770 can suspend the heating or cooling functions if the
outside air temperature is within a prescribed installer set range.
41 | P a g e