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OM 750
NOTICE
NOTICE
If it is intended that the LUI will be used by room occupants to adjust
the Setpoint Offset, then you must not use the optional remote wall-
mounted sensor with 55
O
F to 85
O
F adjustment. When using the
optional remote wall-mounted sensor with 55
O
F to 85
O
F adjustment,
the UVC will ignore any Setpoint Offset changes made at the LUI.
NOTICE
Given
OccupancyMode = Occupied or Bypass
Heat/CoolMode = Heat
SpaceTempSetpoint = (not used)
SetpointOffset = (not used) = 0.0
O
F
SetpointShift = (not used) = 0.0
O
F
OHS = 69.8
°
F
Effective Setpoint Calculations
EffectiveSetpoint = OHS + Setpoint SetpointShift
= 69.8 + 0.0 + 0.0 = 69.8
O
F
Given
OccupancyMode = Occupied or Bypass
Heat/CoolMode = Heat
SpaceTempSetpoint = 71.0
O
F
SetpointOffset = -1.0
O
F (occupant adjustment on remote wall
sensor, or LUI)
SetpointShift = (not used) = 0.0
O
F
OCS = 73.4
°
F, OHS = 69.8
°
F
Effective Setpoint Calculations
AbsoluteOffset = (OCS – OHS) / 2 =(73.4
O
F – 69.8
O
F) / 2 = 1.8
O
F
EffectiveSetpoint = SpaceTempSetpoint – AbsoluteOffset
+ Setpoint SetpointShift = 71.0 - 1.0 - 1.0 + 0.0 = 68.2
O
F
Given
OccupancyMode = Occupied or Bypass
Heat/CoolMode = Cool
SpaceTempSetpoint = 71.0
O
F
SetpointOffset = (not used) = 0.0
O
F
SetpointShift = (not used) = 0.0
O
F
OCS = 73.4
°
F, OHS = 69.8
°
F
Effective Setpoint Calculations
AbsoluteOffset = (OCS – OHS) / 2 = (73.4 – 69.8) / 2 = 1.8
O
F
EffectiveSetpoint = SpaceTempSe Absolute
Setpoint SetpointShift = 71.0 + 1.8 + 0.0 + 0.0 = 72.8
O
F
Given
OccupancyMode = Unoccupied
Heat/CoolMode = Heat
SpaceTempSetpoint = 71.0
O
F
SetpointOffset = -1.0
O
F (occupant adjustment on remote wall
sensor, or LUI)
SetpointShift = (not used) = 0.0
O
F
UHS = 60.8
°
F
Effective Setpoint Calculations
EffectiveSetpoint = UHS + SetpointShift = 60.8 + 0.0 = 60.8
O
F
See table 13 for default values.
Note OHS, OCS can be different than default values.
Table 14. Effective Temp Setpoint Calculation Examples
NOTICE
NOTICE
LUI SETPOINT OFFSET ADJUSTMENT
The LUI can be used to make adjustments to the value of the Setpoint
Offset Input variable. See “Using the LUI to adjust Setpoint Offset”.
The LUI and the network can both effect the Setpoint Offset Input
variable, keep in mind that changes to this variable will be last-one-
wins.
REMOTE WALL-MOUNTED SENSOR WITH +/- 3
O
F
ADJUSTMENT (OPTIONAL)
When the optional remote wall-mounted sensor with +/- 3
O
F adjustment
dial is used, the UVC will effectively write the value of the setpoint
adjustment dial to the Setpoint Offset Input variable.
If it is intended that a network connection will be used to adjust the
Setpoint Offset Input variable, then you must not use the optional
remote wall-mounted sensor with +/- 3
O
F adjustment.
If it is intended that the LUI will be used by room occupants to adjust
the Setpoint Offset, then you must not use the optional remote wall-
mounted sensor with +/- 3
O
F adjustment. If you have the optional
remote wall-mounted sensor with +/- 3
O
F adjustment and an occupant
uses the LUI to make Setpoint Offset adjustments, this will override
any +/- 3
O
F adjustment on the optional remote wall-mounted sensor
as the LUI has higher priority. If you find that changes to the +/- 3
O
F
adjustment on the remote wall-mounted sensor have no effect, it is
likely the LUI has been used by an occupant to make a Setpoint
Offset change, cycle unit power to clear this situation and restore
the ability to change the Setpoint Offset from the +/- 3
O
F adjustment
on the remote wall-mounted sensor.
REMOTE WALL-MOUNTED SENSOR WITH 55
O
F TO 85
O
F
ADJUSTMENT (OPTIONAL)
When the optional remote wall-mounted sensor with 55
O
F to 85
O
F
adjustment dial is used, the UVC will effectively write the value of the
setpoint dial to the Space Temp Setpoint Input variable.
If it is intended that a network connection will be using the Space
Temp Setpoint Input variable, then you must not use the optional
remote wall-mounted sensor with 55
O
F to 85
O
F adjustment.
EFFECTIVE SETPOINT CALCULATION EXAMPLES
The UVC calculates the effective setpoint (Effective Setpoint Output)
based upon the six occupancy setpoints for heating and cooling,
occupancy mode, and the value of the network variables Space Temp
Setpoint Input, Setpoint Offset Input and Setpoint Shift Input. The
UVC will determine if heating or cooling is required based upon the
current unit mode (Heat/Cool Mode Output) and then calculate the
required setpoint for heating or cooling. After this calculation, the
UVC sets the Effective Setpoint Output network variable equal to the
calculated setpoint. The Effective Setpoint Output is the temperature
setpoint that the UVC will maintain and which is normally displayed
on the LUI. The following table provides some examples of how the
UVC temperature setpoints are calculated.
Example D
Example C
Example B
Example A
NOTICE
When using the optional remote wall-mounted sensor with 55
O
F to
85
O
F adjustment, the adjustment dial sets the value of the Space
Temp Setpoint Input variable. The LUI will display the Effective
Setpoint Output as shown in the Effective Setpoint Calculation
Examples.
