Installation
I/O Wiring & Sequence
MSV127 – RT 4STG
• Fan needs to be on
• Call For Cooling or Heating at
le
ast 180 seconds
• There is a 60 seconds between
each
stages
Minimum value
HTG_Dem (AV.6)
1 stage ON
OFF
2 heat stages
2 stage ON
10
25
30
45
BO.2 ON
4 cooling stages
BO.3 ON
BO.4 ON
BO.5 ON
50
100
10
25
30
45
65
70
85
Minimum value
CLG_Dem (AV.7)
Sequence of operation
Occupied Mode: Setpoints will revert to those defined by occupied cooling
and heating setpoints
Occupied Override Mode: The system will revert to occupied mode for the
duration determined by the “OvrTime_Set AV27” parameter
On a call for cooling / System mode is Cooling or Auto: Cooling stages will
be energized according to cooling demand AV7 as per % threshold values to
maintain room temperature. Heating outputs are not energized
On a call for heating / System mode is Heating or Auto : Heating stages will
be energized according to heating demand AV6 as per % threshold values to
maintain room temperature. Cooling outputs are not energized
Fan operation: Occupied mode the fan will follow the fan mode setting
(MSV4 Fan Mode). Fan On will make the fan run continuously during
occupied hours. Fan Auto will only energize the fan on a call for a heating or
cooling stage to be energized
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