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Commissioning
As with any thermostat, commissioning ensures that the thermostat and the equipment
connected to it are operating correctly and as expected. Although the SMT‐770 is a
multifunctional thermostat, commissioning is quite a simple process. Follow the steps
detailed below and use the troubleshooting guide on page 44 if you encounter a
problem.
When the thermostat is fitted to the base plate and when 24VAC power is first applied,
the LCD should briefly show all available segments (a LCD function test) then display the
software version number before showing the time and operating mode etc.
The SMT‐770 is fitted with a number of safety and energy saving time delays. If desired,
these can be disabled for commissioning purposes by entering the
installer mode and setting the CD=00 value to read CD=01. After exiting
the installer menu you will note a "Spanner" icon flashing on the LCD to remind you
that commissioning mode is Active. After commissioning has been completed it is
important to disable commissioning mode by entering the installer menu once again
and setting the CD=01 value back to CD=00.
Note‐ when in commissioning mode ALL time delays are either OFF or
reduced to a extremely low value, it is therefore normal to potentially call
rd
for 3
stage heating almost instantly 0.5deg below the heating set point.
34 | P a g e
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