Installation
I/O Wiring & Sequence
MSV127 – RT MOD
Minimum value
CLG_Dem (AV.7)
1 stage ON
OFF
2 stages
2 stage ON
10
25
30
45
• Fan needs to be on
• Call For Cooling at least 180 seconds
• There is a 60 seconds between each stages
• Fan needs to be on
• Call For Heating at least 180 seconds
• Various settings available for voltage range and actions
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 : Modulating
heating output and On/Off stage will energize as per % threshold
according to heating demand AV6 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
HTG_Dem (AV.6)
1 stage ON
40
100%
0% / OFF
1 stage + 1 modulating heat
CFG_W1 (MSV.16) = On/Off
CFG_W2 (MSV.19) = 0
-10V D
45
35
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