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correctly. If stage 2 heat is being called the full stop "." on the end of the word "MODE"
will be seen to indicate 2
flashing.
Using the temp + or Temp – button set the desired temperature a few degrees above
the ambient temperature. After a few moments you will hear a click and the word
"Cool" will change to "Cooling". Verify that the cooling system is on and operating
correctly. When stage 2 cool is being called, the full stop "." on the end of word
"MODE" mode will be seen to indicate 2
Tap the mode button turn the SMT‐770 OFF. After any necessary timers have expired all
heating, cooling and fan functions should stop. Verify that the system has shut down.
Note, in HP mode (SW2=ON) it is normal for the reversing valve to remain
energised after the compressor has stopped. This is done to prevent "de‐
compression HISS" and to limit the wear on the reversing valve. 30 minutes after the
last reversing valve use it will de‐energise to conserve power.
If commissioning mode has been used it is important that the function be turned OFF
before handover to the user.
Using the User Manual as a guide set the real time clock and the preferred user
programme (if applicable). Explain equipment & thermostat operation to the user.
Commissioning is complete.
36 | P a g e
nd
stage heat. Stage 3 of heat is indicated by the full stop
nd
stage cool.
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