Orion System VAV II Controller v.1 - Manual (Page 46)

MUA II CONTROLLER SETPOINTS
VAV/CAV/MUA Operator Interface SD 46
MUA II Setpoint Screens
Setpoint Screen #1 - Supply Air
Temperature Setpoint
MUA II SPTS 0001
Supply Air Temp
Setpoint...: 70ºF
The Supply Air Setpoint is the desired temperature to be delivered by
the MUA II at any time during the Occupied Mode of operation.
Description Minimum Default Maximum
Supply Air Temp
Setpoint
50ºF 70ºF 90ºF
Setpoint Screen #2 - Staging Deadbands
MUA II SPTS 0001
Staging Deadbands
Cooling.....: 5ºF
Heating.....: 5ºF
The Cooling Deadband added to the Supply Air Setpoint is the Cooling
Mode Setpoint.
When the Outside Air Temperature rises above this setpoint, the MUA
II will go into Cooling Mode. The Heating Deadband is subtracted from
the Supply Air Setpoint to get the Heating Mode Setpoint.
When the Outside Air Temperature drops below this setpoint, the MUA
II will go into Heating Mode.
Description Minimum Default Maximum
Cooling Deadband 2ºF 5ºF 20ºF
Heating Deadband 2ºF 5ºF 20ºF
Setpoint Screen #3 - Unoccupied Deadbands
MUA II SPTS 0001
Unoccupied Deadbands
Cooling.....: 0ºF
Heating.....: 0ºF
During the Unoccupied Mode, these values will be added to the Cool-
ing Setpoint and subtracted from the Heating Setpoint. These settings
are only used if the controller has been confi gured to utilize a Space
Temperature Sensor.
Description Minimum Default Maximum
Unoccupied Cooling Deadband 0ºF 0ºF 30ºF
Unoccupied Heating Deadband 0ºF 0ºF 30ºF
Setpoint Screen #4 - Systems with Reheat -
Dewpoint Control Setpoint
MUA II SPTS 0001
Systems with Re-heat
Dewpoint Control
Setpoint...: 55ºF
The systems capable of Dehumidifi cation will enter this mode of opera-
tion when the Outside Air Dewpoint rises above the Dewpoint Setpoint.
Description Minimum Default Maximum
Dewpoint Setpoint 40ºF 55ºF 80ºF
Setpoint Screen #5 - Enthalpy Staging -
Deadband and Hysteresis
MUA II SPTS 0001
Enthalpy Staging
Deadband....: 5BTU
Hysteresis..: 1.0BTU
The Enthalpy Deadband is the amount of Enthalpy in the Outside Air
needed to activate an extra stage of cooling. The Enthalpy Hysteresis
is used to avoid unnecessary cycling of the Cooling Stages when the
Outside Enthalpy is close to the setpoint.
Description Minimum Default Maximum
Enthalpy Deadband 3 BTU 5 BTU 20 BTU
Enthalpy Hysteresis 0.5 BTU 1.0 BTU 2.5 BTU
Setpoint Screen #6 - Heat Delay During
Dehumidifi cation
MUA II SPTS 0001
Heat Delay During
Dehumidification
Will Occur..: 2 Min
If Heating during Dehumidifi cation is confi gured, this is the amount
of time the Heating call will be delayed after the Dehumidifi cation is
activated.
Description Minimum Default Maximum
Heat Delay 0 Min 2 Min 10 Min