Johnson Controls LX series User manual

1LX Series Unit Ventilator Controller User’s Guide

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Sensor Configuration Wizard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Control Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

LONMARK Functional Profile. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Units in LONWORKS Networks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Language Selection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Selecting a Measurement System or Selecting a Language . . . . . . . . . . . . . . . . . . . . . 16

Unit Ventilator Controller Installation Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

10k Ohm or Digital Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Analog Inputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

4 to 20 mA Analog Input, Externally Supplied . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Sensors and Switches. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Auxiliary Alarm Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Bypass Contact Input. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

CO

2

Level Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Discharge Temperature Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Economizer Enable Input. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Emergency Contact Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Fan Speed Selector Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Fan State Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Mixed Air Temperature Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Mode Selector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Occupancy Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Outdoor Enthalpy Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

LX Series Unit Ventilator Controller

User’s Guide

Code No. LIT-12011486

Issued June 22, 2009

LX Series Unit Ventilator Controller User’s Guide2

Outdoor Humidity Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Outdoor Temperature Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Return Air Temperature Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Setpoint Offset Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Space Enthalpy Input. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Space Humidity Input. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Space Temperature Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Water Temperature Input. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Window Contact Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Outputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Analog Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Analog Output Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Digital Outputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Staged Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Output Selections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Fan Speed 1–3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Heating Outputs 1–4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Cooling Outputs 1–4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Reversing Valve. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Humidifier and Dehumidifier Outputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Minimum Fresh Air Enable (MIN_FRESH_AIR_ENABLE) . . . . . . . . . . . . . . . . . . . . . . . . . 30

Economizer Enable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Heat Valve ON-OFF. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Cool Valve ON-OFF. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Heat Cool Valve ON-OFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Heat Valve Open or Close. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Cooling Valve Open or Close. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Heat Cool Valve Open or Close. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Fan Speed Modulate (FAN_SPEED_MOD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Heating Modulate (HEATING_MOD). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

LX Series Unit Ventilator Controller User’s Guide 3

Heating or Cooling Valve Modulate (HEATING_VALVE_MOD) (COOLING_VALVE_MOD)31

Fresh Air Damper Modulate (FRESH_AIR_DAMPER_MOD) . . . . . . . . . . . . . . . . . . . . . . . 31

Fresh Air Damper Open or Close . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Mode Selection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Network Variables Used for Mode Selection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Occupied Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Starting Occupied Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Ending Occupied Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Unoccupied Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Starting Unoccupied Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Ending Unoccupied Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Bypass Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Starting Bypass Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Ending Bypass Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Standby Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Starting Standby Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Ending Standby Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Slave Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

State Selection and Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Supervisory Control and Scheduling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Calculating the Space Temperature Setpoint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

The Effect of nviSetPoint on the Active Setpoints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

The Effect of a Setpoint Offset on the Active Setpoints. . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Ventilation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

Ventilation Separate from Free Cooling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Control of the Fresh Air Intake. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Outputs That Control the Fresh Air Damper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Humidity Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Cooling State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Free Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

LX Series Unit Ventilator Controller User’s Guide4

When Free Cooling is Used. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Mechanical Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Cooling Demand . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Cooling Output Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Ending the Cooling State. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Heating States . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Heating Demand . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Heating Output Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Cooling Outputs Used to Heat. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Ending the Heating State. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Night Purge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Morning Warm-up State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Using Night Purge and Morning Warm-up with DCV . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Fan Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Terminal Load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Heating Terminal Load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Cooling Terminal Load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Networking Operations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Slave Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Load Shedding. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Setting-up Network Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Network Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Optimum Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Requirements for Optimum Start. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Emergency Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Emergency Initiation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Normal Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

The PID Loop. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Proportional . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Integral . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

LX Series Unit Ventilator Controller User’s Guide 5

Gain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

How It Is Used . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Derivative . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Gain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Deadband . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Alarm Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Alarm Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Alarm Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

Alarm Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

Heartbeat Alarms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

Disconnect Alarms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Emergency Mode Alarms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

User-Set Alarms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Setting up the Unit Ventilator Controller. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

Persistent Network Variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

Setting Units. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Input Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Output Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Output Signal Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

Configuring an Output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

Configuring an Output Represented as a Functional Block. . . . . . . . . . . . . . . . . . . . . . . . . 71

Heating-Cooling Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Optimum Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

Fan-Valve Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

PID Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Alarm Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Space and Return Temperatures and Humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

CO

2

Levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

LX Series Unit Ventilator Controller User’s Guide6

Discharge Temperature and Auxiliary Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

Mixed Air Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

Fan Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

General Settings Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

Radiation Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

Options Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

Optimum Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

Frost Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

Humidity Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

Network Input Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

Heartbeat Alarms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

Network Output Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

Object Manage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

Object Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

Communication Failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

Electrical Fault . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

Out of Limits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

Disabled. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

In Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

In Override. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

Out of Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

Network Variables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

nviApplicMode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

nviCO2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

nviDischargeTemp. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

nviEconoEnable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

nviEmergCmd. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

nviExtCmdOutputx . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

nviFanSpeedCmd. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

nviFanState. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

LX Series Unit Ventilator Controller User’s Guide 7

nviHotWater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

nviMixedAirTemp. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

nviOccCmd and nviOccManCmd . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

nviOutdoorEnth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

nviOutdoorRH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

nviOutdoorTemp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

nviReturnTemp. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

nviSetPoint. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

nviSetPointOffset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

nviShedding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

nviSlave . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

nviSpaceEnth. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

nviSpaceRH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

nviSpaceTemp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

nviWaterTemp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

nvoCtrlOutputx. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

nvoDischargeSetPt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

nvoEconoEnable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

nvoEffectSetPt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

nvoFanSpeed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

nvoHwInputx . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

nvoOccState. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

nvoUValarm. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

nvoUVstate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

nvoSpaceTemp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

nvoTerminalLoad. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

nvoUnitStatus. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

Standard Network Variable Types (SNVTs). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

SNVT_hvac_emerg (103). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

SNVT_hvac_mode (108) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

LX Series Unit Ventilator Controller User’s Guide8

SNVT_hvac_status (112). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

Alarm State. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

SNVT_lev_percent (81) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

SNVT_occupancy (109) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

SNVT_ppm (29) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104

SNVT_switch (95). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104

Switch Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104

SNVT_temp_p (105) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

SNVT_tod_event (128) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

LX Series Unit Ventilator Controller User's Guide 9

LX Series Unit Ventilator Controller

User's Guide

Introduction

The LX Series Unit Ventilator Controller (UVC) seamlessly integrates into a

LONWORKS® network for the control of almost any Unit Ventilator Controller due

to its wide range of output types and LONMARK® certification.

The LX Series Unit Ventilator Controller controls the following equipment:

• up to four stages of mechanical heating or cooling

• modulating heating or cooling valves

• reversing valves for application requiring a heat pump

• floating valves for heating or cooling

• unit ventilator with or without an economizer

• up to three fan speeds or variable speed fans

• humidifier and dehumidifier

• an economizer that requires analog, digital, or Pulse Width Modulation (PWM)

control signals

The UVC has five digital outputs supplying 1.0 ampere at 24 VAC. These outputs

produce digital or PWM signals.

There are also two tri-mode analog outputs on the circuit board. These outputs

provide the following signals:

• linear signals over a 0 to 10 VDC range

• 10 VDC digital or PWM signals

• digital signals of 60 mA at 12 VDC

The controller has six inputs, each capable of one of 21 possible input types. Inputs

have 12-bit resolution and are configured completely by software.

For easy maintenance and installation, the controller is equipped with plug-in

connectors that accept flat cable or wires. The controller uses a TP/FT-10 78 kbps

network configuration.

The information in this guide helps you to set up the UVC, understand the

operation of the UVC, and troubleshoot problems of the device. Information is

organized to follow the UVC configuration wizard menu.

LX Series Unit Ventilator Controller User's Guide10

Sensor Configuration Wizard

The UVC incorporates the sensor configuration wizard. The wizard provides

powerful and simple configuration tools for the hardware inputs. You can select

the digital or analog inputs through the software, which means there are no circuit

board jumpers to move.

Analog input signal types - resistive, voltage, current - are selected in software

without hardware jumpers. Built-in conversion tables are provided for a large

number of thermistors or other sensor types. You can easily create custom

conversion tables by setting the offset, minimum, and maximum values in one

dialog box for the input.

The sensor configuration wizard also provides direct access to network properties

of the analog or digital input including the Standard Network Variable Type

(SNVT), Heartbeat, Send on Delta, Override, Default Value, and Throttle settings.

All input features are conveniently located on one screen, which avoids the hassle

of switching back and forth between screens to fully configure an input. In

addition, the wizard provides warnings of configuration errors as they occur,

enabling you to correct mistakes quickly.

Shown by the LX-UVL wizard view in FX Workbench, the sensor configuration

wizard exists as a separate object. A separate functional block represents each

hardware input. To configure an input, select the hardware input on the left side of

the LX-UVL wizard view of the device and click the Launch button. The sensor

configuration wizard allows you to control network inputs not directly controlled

by the Unit Ventilator Controller.

Control Features

The Unit Ventilator Controller provides Proportional plus Integral plus Derivative

(PID) loops for advanced control of humidity, discharge temperature, and space

temperature. Each PID loop has an individual, configurable deadpan. In addition,

each PID loop provides gain and time adjustment for the integral and derivative

terms, and gain adjustment for the proportional term.

Whereas space temperature control is done with a PI loop only, the presence of the

derivative term adds the ability to precisely adjust space temperature control to

provide better comfort and increased savings.

The PID loop is especially useful in controlling the CO

2

concentration, since this

can vary quickly and greatly as individuals enter and exit meeting rooms, and work

areas. The quick response of the PID loop also maintains duct pressure within

acceptable limits.

Humidification and dehumidification sequences provide the UVC with the ability

to maintain the space humidity at the desired level. The Unit Ventilator Controller

also provides advanced control features often associated with air handlers. These

features include Optimum Start and load shedding.

LX Series Unit Ventilator Controller User's Guide 11

The Optimum Start function maintains statistics that enable the Unit Ventilator

Controller to predict the warm-up or cool-down time period needed to make the

building ready for occupancy. The precise Optimum Start period is calculated

every day using the current outdoor air temperature.

LONMARK Functional Profile

The LX Series Unit Ventilator Controller uses LONWORKS network protocol and is

LONMARK certified for interoperability on any LONWORKS network. The Unit

Ventilator Controller is set up through its own configuration wizard and the Sensor

configuration wizard. You can use FX Workbench or any other network

management tool to install the device onto the network and bind variable

connections.

Figure 1 shows that the Unit Ventilator Controller meets the LONMARK standard

by providing the network variable inputs, network variable outputs, and

configuration properties specified by the profile. In addition, the Unit Ventilator

Controller provides many extra network variable inputs and outputs. These extra

network variables provide a greater flexibility and number of functions than

required in the LONMARK profile.

For example, you can use network input nviSlave, to slave the UVC to another

unit, whereas network output nvoUnitStatus, enables the UVC to act as the master

node. The Unit Ventilator Controller has network inputs that permit the use of

outside enthalpy sensors and space enthalpy sensors. These inputs provide better

calculation of the cooling or heating effect of the outside air upon the conditioned

space.

The input object has conversion tables and hardware properties present as

configuration properties in the area marked Manufacturer Configuration

Properties. By choosing from a list of standard thermistors, you can select different

conversion properties. The conversion tables configuration property allows you to

create your own custom tables. Hardware properties, located in the same area,

allow you to modify your input from the software object.

LX Series Unit Ventilator Controller User's Guide12

Figure 1: LX Series Unit Ventilator Controller:

L

ONMARK Functional Profile

LX-UVL-1 Unit Ventilator

Object Type #8080

nvoSpaceTemp

SNVT_temp_p

Configuration Properties

Occ. Temperature Set Points (mandatory)

Maximum Send Time (mandatory)

Minimum Send Time (optional)

Maximum Receive Time (optional)

CO2 limit (optional)

Local Bypass Time (optional)

nviSpaceTemp

SNVT_temp_p

Mandatory

Network

Variables

Optional

Network

Variables

Manufacturer

Network

Variables

nviEmergCmd

SNVT_hvac_emerg

nvoEffectSetpt

SNVT_temp_p

nvoTerminalLoad

SNVT_lev_ percent

nviApplicMode

SNVT_hvac_mode

nviSetPtOffset

SNVT_temp_p

nvoOccState

SNVT_ occupancy

nviOutdoorRH

SNVT_lev_ percent

nvoUnitStatus

SNVT_hvac_status

nviSpaceRH

SNVT_lev_ percent

nvoCtrlOutput1

SNVT_switch

nviCO2

SNVT_ppm

nviSpaceEnth

SNVT_ enthalpy

nviOutdoorEnth

SNVT_ enthalpy

nviSlave

SNVT_hvac_status

nviOutdoorTemp

SNVT_temp_p

nvoCtrlOutput7

SNVT_switch

.

Manufacturer Configuration Properties

Please see the manual for details.

Wizard for configuration provided.

nviFanState

SNVT_switch

nviEconoEnable

SNVT_switch

nviMixedAirTemp

SNVT_temp_p

nviReturnTemp

SNVT_temp_p

nviShedding

SNVT_switch

nviOccManCmd

SNVT_ occupancy

nviOccCmd

SNVT_tod_event

nviSupplyTemp

SNVT_temp_p

nvoEconoEnable

SNVT_switch

nvoFanSpeed

SNVT_switch

nviSetpoint

SNVT_temp_p

nviWaterTemp

SNVT_temp_p

nviHotWater

SNVT_switch

nvoSupplySetPt

SNVT_temp_p

nviFanSpeedCmd

SNVT_switch

LX Series Unit Ventilator Controller User's Guide 13

Figure 2 shows the Unit Ventilator Controller input object and the output object.

Figure 2: LX Series Unit Ventilator Controller Inputs and Outputs

6 x LX-UVL-1 Hardware Input

Object Type #1

nvoHwInput1

SNVT_xxx

Configuration Properties

Offset (optional)

Maximum Range (optional)

Minimum Range (optional)

Minimum Send Delta (optional)

Maximum Send Time (optional)

Minimum Send Time (optional)

Override Value (optional)

Mandatory

Network

Variables

Manufacturer Configuration Properties

Object Major Version

Object Minor Version

Input Signal Conditioning

Hardware Properties

Translation Table

Default Value

7 x LX-UVL-1 Hardware Output

Object Type #3

nviExtCmdOutput1

SNVT_switch

Configuration Properties

Maximum Receive Time (optional)

Override Value (optional)

Mandatory

Network

Variables

Manufacturer Configuration Properties

Object Major Version

Object Minor Version

Output Signal Conditioning

PWM Period

Hardware Properties

Default Value

LX Series Unit Ventilator Controller User's Guide14

The node object displays the nvoUVstate and nvoUValarm variables as

manufacturer’s variables. These variables provide information about the alarm

conditions in the Unit Ventilator Controller and about the operating state of the

device (Figure 3).

Units in LONWORKS Networks

Note: Use this section if you are using the Imperial System of measure.

The Imperial System and the International System (SI) are the two main

measurement systems used today. Table 1 compares Imperial units and SI units.

Echelon® SNVTs are based upon SI units. Thus, the most basic structure of the

L

ONWORKS network is SI based. This basis can lead to some unavoidable

problems in data conversion if you are using Imperial units.

Table 1: Comparing Imperial and SI Units

Imperial Units SI

inch centimeter

yard meter

mile kilometer

degrees Fahrenheit degrees Centigrade

Figure 3: LX Series Unit Ventilator Controller

Node Object Type

LX- UVL- 1 Node

Object Type #0

nvoStatus

SNVT_obj_ status

Configuration Properties

Location (optional)

Device Major Version (optional)

Device Minor Version (optional)

nviRequest

SNVT_obj_ request

Mandatory

Net work

Variables

Optional

Net work

Variables

Manufacturer

Net work

Variables

nvoFileDirectory

SNVT_ address

nvoUVstate

SNVT_ st ate_64

nvoUValarm

SNVT_ st ate_64

Manufacturer Configuration Properties

Maximum Send Time

LX Series Unit Ventilator Controller User's Guide 15

The LX-UVL wizard in FX Workbench provides some automatic conversion

between SI and Imperial units. However, these are not ideal conversions because a

whole number in one system becomes a long decimal fraction in the other. For

example, 72°F is approximately equal to 22.22222°C.

The values created by converting Imperial to SI or SI to Imperial are subject to

rounding errors. If you enter an Imperial value into a LONWORKS SNVT by using

the LX-UVL Controller configuration wizard, the value is converted after it is

entered, then rounded and written to the SNVT. When you want to monitor the

SNVT, the value must be read from the SNVT, converted, and rounded again

before it is displayed. Due to the two conversions and two rounding operations, the

value may differ slightly from what you originally entered (Figure 4).

The same process and resulting rounding error applies to Standard Configuration

Property Types (SCPTs).

Instructions for changing or modifying the units of measure used on your computer

are provided in the Selecting a Measurement System or Selecting a Language

section.

Language Selection

The following may require you to change your language settings:

• You changed your regional settings by selecting a different region in the

Regional and Language Options dialog box.

• You are working on a site that is in a linguistic region other than your own.

• You are dissatisfied with the language displayed on program menus and dialog

boxes.

Figure 4: Writing and Reading Data in Imperial Units in the

L

ONWORKS Network

Value is written in

Imperial Units.

Value is translated

to SI units.

Value is rounded.

Value is read

from SNVT.

Value is translated

to SI units.

Value is rounded.

Data is displayed

for monitoring in

Imperial Units.

Units

Value is stored

in SNVT.

LX Series Unit Ventilator Controller User's Guide16

You can change your language settings in the Advanced tab of the Regional and

Language Options dialog box. Instructions are provided in the following Selecting

a Measurement System or Selecting a Language section.

Selecting a Measurement System or Selecting a Language

To select units of measurement or to select a language:

1. In Microsoft® Windows XP® operating system, click Start > Control Panel.

The Control Panel appears.

2. In the Control Panel, open Date, Time, Language, and Regional Options.

3. Under the list titled Pick a Task, select and open the second item titled Change

the format of numbers, dates, and times (Figure 5).

Figure 5: Date, Time, Language, and Regional Options Screen

LX Series Unit Ventilator Controller User's Guide 17

4. Select your language region from the drop-down list provided. The number,

time, and date formats fill automatically (Figure 6).

5. In the Number box, verify the number format uses a decimal point to indicate

numerals representing values less than 1. For example, use 123,456,789.00,

not 123 456 789,00. You must use a decimal point for the correct display of

numerals.

6. In the Regional Options dialog box, click Customize.

Figure 6: Regional and Language Options Dialog Box

LX Series Unit Ventilator Controller User's Guide18

7. Click on the drop-down arrow next to the box labeled Measurement system

and select Metric (Figure 7).

8. Verify the Decimal symbol box contains a decimal symbol. If the Decimal

symbol box does not contain a decimal symbol, select the symbol in the box,

and click Apply.

9. Click OK.

10. Click the Advanced tab and choose a language region by selecting from the

drop-down list. Verify the correct language appears on program menus.

11. Click OK.

You have now set the units to appear in the LX-UVL wizard. If you have chosen to

display Imperial units, remember that the SNVTs are still using SI units. If you are

viewing the data in Imperial units, you are viewing a converted, rounded value.

Figure 7: Customize Regional Options

LX Series Unit Ventilator Controller User's Guide 19

Unit Ventilator Controller Installation Overview

Figure 8 shows one possible installation of the Unit Ventilator Controller. Inputs,

outputs, ducts, and heating or cooling units have been marked for your

convenience.

Note: Not all possible sensors are shown.

Inputs

The Unit Ventilator Controller has six universal inputs. You can configure

universal inputs by using the Unit Ventilator Controller configuration wizard.

Universal inputs are configured as either:

• analog inputs sensing either current or voltage, or

• digital inputs or 10k ohm resistance inputs

Note: Because the Unit Ventilator Controller can connect to a maximum of six

sensors, you may want to connect some sensors using the LONWORKS

network. All valid network inputs have priority over hardware inputs.

Figure 8: Possible LX-UVL Installation

Heating

Damper

Filter

Cooling

Fresh Air

(Economizer)

Damper

Humidifier

Return

Air

Intake Air

Mixed

Air

C

O

MAT DATOAT

RAT

Damper

Setpoint Offsett

Temperature

Humidity

Discharge

Air

Conditioned Space

Occupancy

LX-UVL- 1 Installation Overview

Unit Ventilator Enclosure

OAH

MAT Mixed Air Temperature

OAH Outside Air Humidity

OAT Outside Air Temperature

RAT Return Air Temperature

DAT Discharge Air Temperature

Sensor Symbols

Humidity

Temperature

Carbon Dioxide

C

O

Digital Input

3 Fan

Speeds

Unit Ventilator Enclosure

LX Series Unit Ventilator Controller User's Guide20

10k Ohm or Digital Input

The universal input, when configured as a 10k ohm or digital input, accepts a 10k

ohm resistance input or a digital input such as a switch, also known as a cold

contact.

The 10k ohm resistance range accommodates 10k ohm thermistors used in space

temperature sensors or duct temperature sensors, or a 10k ohm potentiometer used

as a setpoint offset.

Use the conversion table for resistance input of more than 10k ohm. The digital

range accommodates the occupancy contact, bypass switch, and window switch.

See Figure 9 for wiring information for both 10k ohm resistance and digital inputs.

Figure 9: 10k Ohm or Digital Input

I

1

I

2

I

3

I4 I6I5

–

+

++ + + +

––

Contact

NO -NC

Thermistor

10kOhm

Both inputs are configured as 10 k Ohm

or Digital Input Configuration could be done

with either the LX-UVL wizard in or the

Hardware Input Wizard

LX-UVL

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Johnson Controls LX series User manual

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