iWorx® MPU2
505-009, Effective: April 28, 2014
33
© 2014 Taco Electronic Solutions, Inc.
Automatic Configuration
The MPU2 and iWorx® Local Control Interface (LCI) use a self-configuring network management scheme requiring no
external tools, binding, or L
ON
W
ORKS
knowledge. The LCI recognizes and configures the MPU2 when the controller’s
service pin is pressed. The controller’s status light flashes green until the controller is configured, and is solid green
after the controller is configured. Once the service pin has been pressed, no further action is required by the user; the
controller is fully accessible to the LCI. Users may bind to SNVTs on the MPU2 with LNS or other L
ON
W
ORKS
tools if
they wish.
The LCI also provides network supervision of the MPU2. The LCI periodically sends a "ping" message to the MPU2,
which elicits a response. If the response fails, an alarm is displayed on the LCI. The LCI also uses the "ping" message
to refresh the occupancy mode and other system wide data.
CONTROLLER IDENTIFICATION
Once the MPU2 is properly installed and recognized by the Local Control Interface (LCI), the LCI can be used to con-
figure the settings of the controller. This section describes the commands available on the LCI for configuration of the
MPU2, and the meanings and default values for controller parameters. For more information on using the LCI, see the
iWorX LCI Application Guide
.
Inputs
The Inputs screen displays the current values of the MPU2’s inputs. These values cannot be changed.
Input
Range
Description
Outside Temp
-29 to 230
°F (-33.9 to 110
°C)
The outside air temperature communi-
cated through the LCI from the ASM con-
troller.
Inside Enthalpy
0.0 to 60.0
BTU/lb. (0.0 to 139.6
kjoule/kg)
Calculated inside air enthalpy.
Outside Enthalpy
0.0 to 60.0
BTU/lb. (0.0 to 139.6
kjoule/kg)
Calculated outside air enthalpy.
Smoke Detector
Normal, Smoke
Status of the smoke detector (SMK).
Fan Status
Off, On
Status of the fan proof switch (FNP)
Low Limit
Normal, Low Limit
Status of the mixed air low limit indication
switch (MLL).
Filter Status
Normal, Dirty
Status of the filter switch (FIL).
Indoor Air Quality
Normal, Alarm
Status of the IAQ alarm sensor.
Occupancy Mode
Occupied, Unoccupied, Bypass
Occupancy mode of controller
Supply Air Temp
-29 to 230
°F (-33.9 to 110
°C
Temperature of the supply air duct.
Mixed Air Temp
-29 to 230
°F (-33.9 to 110
°C)
Temperature of the mixed air plenum.
Return Air Temp
-29 to 230
°F (-33.9 to 110
°C)
Temperature of the return air duct.
Return Air Humidity
0.00 to 100.00%
Humidity reported by the RAH sensor.
Static Pressure
0.00 to 5.00”
W.C. (0 to 1246
Pa)
Static pressure in the supply air duct.
IAQ
0-4000ppm
Reading of the indoor air quality sensor
when defined as Analog.
