Related Manuals for Lennox @DNOVA 2mAC ADVANCED CONTROLLER
Summary of Contents for Lennox @DNOVA 2mAC ADVANCED CONTROLLER
- Page 1 Installation, operating and maintenance @DNOVA 2µAC ADVANCED CONTROLLER Providing indoor climate comfort @DNOVA-µAC-IOM-0907-E...
-
Page 3: Table Of Contents
CONTENTS CONTENTS contents GeneRAL cHARActeRIstIcs General description ......................2 µAc UseR InteRFAce The display ........................3 Status indicators ......................4 The keypad ........................4 InstALLAtIon Initial start-up procedure ....................4 The I/O (Input/Output) board ..................4 Meaning of the inputs and the outputs .................5 oPeRAtInG MoDes Precision units for telecom ...................6 Connecting a series of units ..................6 PRoGRAMMInG PARAMeteRs AnD tHeIR MoDIFIcAtIon... -
Page 4: General Characteristics
GENERAL CHARACTERISTICS GeneRAL cHARActeRIstIcs General description controlled devices: • 1 or 2 compressors or valve for cooling battery The µAC is an electronic control for the complete management • 1 or 2 heating elements or valve for heating battery of precision air-conditioners, for “Shelters” with management •... -
Page 5: Μac User Interface
µAC USER INTERFACE µAC USER INTERFACE The µAC is made up of a display and a power board, installed the display together in the same case, see Fig. 1. The display shows the main measurements monitored and the status of the machine and the actuators. Following is a description of the symbols and the messages shown on the display, and the corresponding meaning. -
Page 6: Status Indicators
µAC USER INTERFACE status indicators The main states of the regulator (power supply present, alarm active and remote ON/OFF input status) are displayed to the user through 3 LEDs on the front panel. Meaning of the LeD Line LeD (yellow): control powered Alarm LeD (red): machine alarm (the siren symbol on the display is on only when the buzzer is active) on LeD (green): machine ON from keypad or supervisor... -
Page 7: Installation
INSTALLATION InstALLAtIon Initial start-up procedure the I/o (Input/output) board To install the control, proceed as indicated below, with Fig. 3 shows the I/O board. reference to the connection diagrams provided. With reference to this figure, we can see: 1. connect the probes and power supply: the probes can be - in the lower part the Molex connectors (1 - 2 - 3), for the located up to a maximum distance of 50 metres from the main connections;... -
Page 8: Operating Modes
OPERATING MODES oPeRAtInG MoDes Following are descriptions of some examples of the main machine configurations. Precision units for telecom Recirculation Heating element line line line line Air outlet alarm condensator alarm 1 Power Air flow supply damper 24Vac diverter main air flow alarm heaters alarm outdoor temp. -
Page 9: Programming Parameters And Their Modification
PROGRAMMING PARAMETERS AND THEIR MODIFICATION The diagram shows how all the electrical panels can be the 1. one (and only one) machine must be set as master; same, and only during installation does connection have to 2. it is recommended to terminate the line with a resistor (Rt), be made, as in Fig. - Page 10 PROGRAMMING PARAMETERS AND THEIR MODIFICATION Accessing Factory parameters (F) The number 0 is displayed and, on the left the lock symbol , confirming access via password to the procedure. - The buttons are used to enter the password 177, which is confirmed by pressing the enter button.
- Page 11 PROGRAMMING PARAMETERS AND THEIR MODIFICATION setting the default parameters Pressing the button alarm on start up saves the default parameters in the EEPROM. During this operation the message dF is displayed. copying data from the key to the machine’s eePRoM With the power disconnected from the µAC, insert the key in the relative connector.
-
Page 12: Description And Configuration Of The Parameters
DESCRIPTION AND CONFIGURATION OF THE PARAMETERS DescRIPtIon AnD conFIGURAtIon oF tHe PARAMeteRs Probes type Def. Pres. U.o. M. Var. Presence external air probe B2 flag 0= absent 1= NTC Carel Type of humidity press./temp. probe B3 flags 0= absent 1= 0-1Vdc or 0-20mA 2= 4-20mA Presence supply air B4 0= absent flag... - Page 13 DESCRIPTION AND CONFIGURATION OF THE PARAMETERS compressor U.o. M. Var. Def. Pres. Minimum ON time 300 s Minimum OFF time Time between 2 start-ups ON delay between the 2 compressors OFF delay between the 2 compressors Compressor rotation 0= disabled 1= enabled Delay comp.
- Page 14 DESCRIPTION AND CONFIGURATION OF THE PARAMETERS Alarm type Def. Pres. U.o.M. Var. Flow alarm delay from fan start-up Flow alarm delay during operation Low pressure alarm delay from compressor Buzzer activation 0= OFF, 1-14= min. 15= continuous Reset alarms (various configurations) flag Delta from effective set point for low temperature 50 90...
- Page 15 DESCRIPTION AND CONFIGURATION OF THE PARAMETERS General type U.o.M. Var. Def. Pres. 3P valve or damper excursion time flag Presence of humidifier flags Type of dehumidification 0= comp. 1 ON 1= comp. 2 ON 2= two comp. ON 3= capacity-controlled cooling ramp 4= fan speed reduction 5= action 4+0 6= action 4+1...
-
Page 16: Probe Parameters
DESCRIPTION AND CONFIGURATION OF THE PARAMETERS = probe parameters 1 Presence external air probe B2. 4 Minimum value measured by input B3 at 0mA, 4mA Sets the presence of probe NTC B2, the corresponding function or 0Vdc must be selected using parameter HC. This parameter allows the configuring of the minimum value 0= probe absent for probe B3. -
Page 17: R = Regulation Parameters
DESCRIPTION AND CONFIGURATION OF THE PARAMETERS r = regulation parameters r5 Humidity set point r1 temperature set point (cooling) Sets the humidity set point (see diagrams at the end of the Sets the temperature set point (diag. at the end of the paragraph). - Page 18 DESCRIPTION AND CONFIGURATION OF THE PARAMETERS The trigger is excluded with a fixed relative differential of ro Reading probe B2 1.5°C (P. 22). The trigger is also excluded if probe B2 is External air temperature. only appears when the probe is malfunctioning.
-
Page 19: C= Compressor Management Parameters
DESCRIPTION AND CONFIGURATION OF THE PARAMETERS c= compressor management parameters F= fan management parameters c1 Minimum on time F1 Fan operating mode Sets the minimum activation time for the compressor, This parameter imust be set to 0 during the setting of limits irrespective of request (see diagram at the end of the F2 and F3. -
Page 20: P= Alarm Management Parameters
DESCRIPTION AND CONFIGURATION OF THE PARAMETERS F8 Maximum output value Fc Filter hour counter Specifies a speed value below the maximum value, set Indicates the number of operating hours of the filter. This using the parameter F3. (see diagrams at the end of the hour counter is increased if the fan is working;... - Page 21 DESCRIPTION AND CONFIGURATION OF THE PARAMETERS cod. Description P5= 1 P5= 2 P5= 3 P5= 4 P5= 5 probe B1 auto auto auto auto probe B2 auto auto auto auto probe B3 auto auto auto auto probe B4 auto auto auto auto EEPROM run...
-
Page 22: H= General Configuration Parameters
DESCRIPTION AND CONFIGURATION OF THE PARAMETERS Pd Return-supply temp. difference for supply temperature Pe ID4 input selection alarm If = 1 instead of the heating element thermal overload alarm it Sets the minimum difference between the return temperature activates a smoke-fire alarm. (measured by B1) and the supply temperature (measured by Range: 0÷1 flag Def.: 0 B4) for the activation of the cooling function alarm (At). -
Page 23: Heating/Cooling Valve And Damper Management
DESCRIPTION AND CONFIGURATION OF THE PARAMETERS Heating/cooling valve and damper management H5 operating mode of the 2 “cooling” outputs out1/ out Sets for models ED and CW (H1=1 or 2) the type of cooling If the actuator for the control of heating or cooling is of a actuators connected, see table below. -
Page 24: Free-Cooling Function
DESCRIPTION AND CONFIGURATION OF THE PARAMETERS HF Logic of the alarm relay (out 6) Free-cooling function Selects the logic of the relay, normally energised or de- energised, and the category of alarms which activate this In shelter-type units, energy saving can be achieved using a relay. -
Page 25: Clock, Time Bands And Alarm Log
CLOCK, TIME BANDS AND ALARM LOG cLocK, tIMe BAnDs AnD ALARM LoG Functions enabled only with the clock board MAc2cLK000 installed. clock time display Pressing the button displays the current time and date. Pressing the button once displays the time and the day of the week (1= Monday, 2= Tuesday, ..., 7= Sunday);... -
Page 26: Alarm Log
CLOCK, TIME BANDS AND ALARM LOG The operating mode controlled by the time bands is indicated The machine is reactivated in the following conditions: a) the temperature exceeds 70% of the high/low alarm by the symbol on the display. threshold,returning to Sleep if the temperature falls within 40% of the alarm delta. - Page 27 CLOCK, TIME BANDS AND ALARM LOG The entire alarm log can be deleted from within the display of log itself, by pressing the buttons together for 5 seconds. At this point the FACTORY password (177) is required, which, confirmed by enter, leads to the deletion of the log.
-
Page 28: Alarms And Signals
ALARM AND SIGNALS ALARMs AnD sIGnALs • the switching off of the red alarm LED; In the event of an alarm, the machine performs the following • the re-activation of the actuators switched off by the alarm. actions: Pressing the buttons together for 2 seconds cancels •... -
Page 29: Alarm Signals
ALARM AND SIGNALS Alarm signals All the alarms, except for the generic external alarm (AL), L1-L2: low pressure c1-c2 configured by parameter Pb, and the clock, are detected Detected only with the compressor on, and causes its only when the machine is on. immediate switching off without waiting the corresponding delay times. -
Page 30: Machine Shut-Down Signals
ALARM AND SIGNALS ht: high temperature prealarm AL: generic external alarm This alarm can be configured using the PG=1 parameter. This alarm can be configured by setting parameters Pb and This alarm is delayed by the startup of the regulator (or by PC. -
Page 31: Optional Boards
OPTIONAL BOARDS oPtIonAL BoARDs The µAC is designed for the application of optional boards, depending on requirements. - Rs485 serial board: the µAC can be included in a supervisory or telemaintenance network; Serial Converter RS 485 - clock board: enables the clock functions, time bands and alarm log;... -
Page 32: Technical Specifications
TECHNICAL SPECIFICATIONS tecHnIcAL sPecIFIcAtIons Power supply: 24Vac ±15% 50/60Hz Maximum current consumption: 200mA with internal 800mA T fuse (slow-blow) Power transformer for µAc and digital 10VA inputs: operating range: Temperature probes -30÷70°C Humidity probe 0÷100% r.H. Accuracy of measurement (excluding ±0.5°C NTC probes / ±0.005V 0.5% f.s. - Page 34 BELGIUM, LUXEMBOURG RUSSIA Due to Lennox’s ongoing commitment to quality, www.lennoxbelgium.com www.lennoxrussia.com the Specifications, Ratings and Dimensions are subject to change without notice and without incurring liability. CZECH REPUBLIC SLOVAKIA Improper installation, adjustment, alteration, www.lennoxczech.com www.lennoxdistribution.com service or maintenance can cause property damage or personal injury.