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Operating Instructions - Paul Wärmerückgewinnung

Contents

1. 25 Post heating or cooling external coil SAT BA KW 25 Run time and maintenance alarm 22420 4200200008000nnnnonnnnnnnnnnnne nenn nenne nenne nenne nnnnnnnnn nennen 26 Operating with time tables u002220000000000000ennnn neuen nnnnnne nennen nnnm nnne nnn nnns 26 86350Hal PrOgLamming anerkennen 26 ADVANCED SETUP dien peto oe pn ve o u 27 Use of RC TACA remote control nu na 27 Connecting the RC TACA to the CB4 TACA DG 27 Open MERG TACA Casi N re RE 28 Wiring diagram to connect the RC TAC4 REC to the TAC4 DG circuit 29 Use orte RO TAGA Eee cd a BEE UA 29 RC TAC IS MaSter nin cielo a a u a a u Eu Bea ee a 29 MODBUS IS Master susanne un Ener ne Baal 29 Detailed MOBBUS Table 4 32 29 GENE a er ee CRT 30 VISUAIIZAUON As T md 30 CORTON ee ee INE 33 set 35 SETUP parate tels iter een 36 ADVANCED SETUP parame tel suis ouai dis ee 38 Time scheallersasx cer 41 Time schedule SIPUCLIUFG S eco doc ette des Ete en Eau an 41 Time scheduler IMAI DING sxc E nme al nein 4
2. ee LU ubi it ee 7 VWIFIBIG OO SITIS eei een ee T GPS Node ss ses a E E 8 Wirmg diagrams sent oa aed ast 8 OPEITOG O eee ee ee er len otic neh 8 BYPASS function LIE a Radios 8 BOOS ETUC ae ee m 9 Opening closing of dampers CT option at 9 Heat exchanger antifrost protection system eese nennen 9 Protection antifreeze via pulse flow reduction ccccccseeeecceseeecceeseeeceeeeeecsagseecsegseesseaseeeees 9 Antifrosting the heat exchanger with 1pre heating KWin option ssssss 10 KWout post heating electrical coil control 11 NVA NDC AOL eli Stak saree R 11 Post heating NV option regulation ccccccsssececceesceeceeseeecseseeceaseeessageeecseseesssseesssagees 12 VVIFING GIA QI AMS ana Lote none Bites tu Dus uo Mia 12 Regelation for external coil s SAT TAC4 BA KW 14 THIME SIOTS SCMEGUICS pem cr 14 PAVING cis see tea tou eL a 14 14
3. 99 9 C BA control enters 15min antifreeze cycle if T3 lt this threshold and OUT8 lt 3V 40554 R W E1 NV Antifreeze T threshold 0 999 In 0 1 C units Range 0 999 meaning 0 99 9 C BA control enters 15min antifreeze cycle if T4 lt this threshold and OUT4 NV lt 3V 9 7 Time scheduler 9 7 1 Time schedule structure Time schedule for 1 week 6 time segments per day Each time segment has 8 parameters 10 registers are provided per time segment Register Description Accepted alues 41xx0 Start time Starting time of this time segment 0 2359 Value 100 hh mm 800 8h00 1 not used Value 1 this time segment is not used Each time segment runs until another time segment starts Factory default 1 time segment not used 41xx1 Workingmode Working mode 0 1 20or4 O OFF 1 CA 2 LS 4 CPs 41xx2 Start Stop 0 Fans stopped 1 1 Fans run Factory default 1 Run Not used always at 1 41xx3 Setpoint 1 If 4100120 OFF mode not used 0 9999 If 41001 1 CA mode setpoint for supply airflow in m3 h units Range 0 max of unit If 41001 2 LS mode Percentage of nominal setpoint if 405051 setpoint only for supply in 9o units Range 0 100 If 4100123 CPs mode Percentage of nominal setpoint if 40443 2 setpoint only for supply in units Range 0 100 41xx4 Setpoint 2 If 4100120 OFF mode not used 0 9999 If 4100121 CA mode setpoint for exhaust airflow in m3 h units
4. 0 0 0 10 1 20r3 999 999 16383 31 40152 40155 40154 40155 40156 40157 40158 40159 40161 40162 40168 40170 40171 32 R R E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 Bit 6 INA Bit 7 IN5 Bit 8 6 Bit 9 IN7 Bit 10 8 Bit 11 IN9 Bit 12 IN10 Bit 13 IN11 K1 Analog voltage K1 is a digital input but it is shown here for completeness 0 100 0 10 0V K2 Analog voltage 0 100 0 10 0V K3 Analog voltage 0 100 0 10 0V Temperature T 1 in 0 1 C units Range 990 990 meaning 99 0 99 0 C 999 means open circuit 999 means short circuit Temperature T 2 in 0 1 C units Range 990 990 meaning 99 0 99 0 C 999 means open circuit 999 means short circuit Temperature T 3 in 0 1 C units Range 990 990 meaning 99 0 99 0 C 999 means open circuit 999 means short circuit Temperature T 4 in 0 1 C units Range 990 990 meaning 99 0 99 0 C 999 means open circuit 999 means short circuit Temperature T 5 in 0 1 C units Range 990 990 meaning 99 0 99 0 C 999 means open circuit 999 means short circuit Temperature T 7 in 0 1 C units Range 990 990 meaning 99 0 99 0 C 999 means open circuit 999 means short circuit Temperature T 8 in 0 1 C units Range 990 990 meaning 99 0 99 0
5. See Bee ol ololo olol olo B B A GND 12V A GND 12V H Cable specifications e Recommended cable category 5 shielded twisted pair FTP cable with a section of 0 26 0 50 mm Use 1 pair to connect GND and 12V and 1 pair to connect B and A e Maximum cable length 1000 m Keep this communication cable at distance from power cables e lf the unit is installed in a location with high electro mechanical interference levels we strongly advise to connect the shield of the TAC4 DG RC cable on one side of the ground only e lf the maxi unit is installed outside select a suitable cable for outdoor application UV light 8 3 Use of the RC TAC4 8 3 1 RC TAC4 is master The MODBUS Communication does not control the fans register 40200 1 2 or 3 The RC allows the configuration of the unit the control of the fans and the display of all the parameters For more information on its use refer to Operating instructions TAC4 RC documentation available on our www paul lueftung de site 8 3 2 MODBUS is master An RC TAC4 connected to a unit controlled via MODBUS register 40200 1 or 2 can display the parameters of the unit Control and configuration features are disabled on the RC TAC4 For more information refer to Operating instructions TAC4 RC visualization display documentation available on our www paul lueftung de site However it is possible to enable the RC TAC4 control features by closing th
6. 7 4 Viewing temperatures Inlet Temperature of stale air from the interior T2 40156 Water coil temperature NV option T4 40158 Hot water coil temperature BA ou BA option T7 40161 Temperature sensor alarm 40300 bit 8 to 15 40301 bit O to 7 7 5 Pressure alarm Setup Select delta P for pressure alarm on supply airflow 40432 Stop the unit if pressure alarm 40500 Select reference airflow to determine pressure alarm threshold 40434 on supply side Select reference airflow to determine pressure alarm threshold 40436 on exhaust side Start initialization procedure to measure pressure 40253 If configuration via initialisation Alarm while initializing pressure setpoint 40302 bit 12 to 15 40303 bit O to 3 Control Activate pressure alarm status 40224 Display Reference airflow for pressure alarm supply side 40064 Pressure for pressure alarm supply side 40062 Pressure for pressure alarm exhaust side 40064 Status of pressure alarm on the supply and or exhaust side s 40300 bit 6 and 7 7 6 Fire alarm Setup 405100 Select action off on in case of fire alarm supply side 40226 Select action off on in case of fire alarm exhaust side 40227 40512 Control Visualization 24 7 7 Bypass Setup Select outside temperature threshold toopenbypass 40513 1 Select inside temperature threshold to open bypass 40514
7. ALARM CA FAN 2 HIGH Bit 8 ALARM CA FAN 3 LOW Bit 9 ALARM CA FAN 3 HIGH Bit 10 ALARM CA FAN 4 LOW Bit 11 ALARM CA FAN 4 HIGH Bit 12 ALARM PA INIT F1 NOT STAB Bit 13 ALARM PA INIT F3 NOT STAB Bit 14 ALARM PA INIT TOO LOW Bit 15 ALARM PA INIT F3 TOO LOW 35 40303 R E1 ALARM PA _INIT_F1_NOT ACHIEVED 0 65535 Bit 1 ALARM PA INIT F3 NOT ACHIEVED Bit 2 ALARM PA INIT F4 TOO HIGH Bit 3 ALARM PA INIT F3 TOO HIGH Bit 4 ALARM MAINT WARN Bit 5 ALARM FATAL Bit 6 ALARM DPA Bit 7 ALARM FIRE Bit 8 ALARM END OF FIRE ALARM Bit 9 ALARM VLOWERVLOW Bit 10 ALARM VHIGERVHIGH Bit 11 ALARM PREHEAT REDUCED Bit 12 ALARM PREHEAT STOP Bit 13 ALARM REDUCED Bit 14 ALARM AF STOP Bit 15 ALARM POSTHEAT SETPOINT 40304 R E1 Bit 0 ALARM POSTCOOLING SETPOINT Supply T too high 0 65535 Bit 1 ALARM SAT BA MODULE SAT BA module is configured but does not respond 9 5 SETUP parameters values 40400 Current time seconds 0 59 Do not write the time register cyclically doing so will slow the clock counter 40401 R W E1 Current time minutes 0 59 Do not write the time register cyclically doing so will slow the clock counter 40402 R W E1 Current time hours 0 23 Do not write the time register cyclically doing so will slow the clock counter 40403 R W E1 Current date day of month 1 31 Do not write the time register cyclically doing so will slow the clock counter 40404 R W E1 Cur
8. Alam TADIG 17 Wining Alagrams TR 18 Plugin the SAT MODBUS 18 Wiring the SAT MODBUS i 19 Definition of the MODBUS RTU communication e ecce nn 19 MODBUS Protocol IO eit Lo ad St 19 MOBYUS TIME UE T 19 MODBUS Cx CODON cett Deis ape ux coh bot abut doni puto etd ante cete 20 cec ee 20 Write cycles TmItedODi adesse idu rasen 20 8 3 2 9 1 9 2 9 3 9 4 9 5 9 6 9 7 9 7 1 9 7 2 9 8 9 8 1 9 8 2 MODBUS map overview sn nee ee 21 Use of MODBUS commands oie Dai cedo uiui eu ae 21 MODBUS address i 222 een En 21 Fans WOLKING MOdes x T Gd A T pd ER Rua UD o 21 CA mode airflows are continuously being 56 5 21 TAC EE S o o m 22 E dante ee ED T T TN 22 CROI secu S ILE I due E 22 Viewing OF Tan 23 Viewing Tempetalures nee ae een ee 23 Pressure alalise bari Suet 23 DE 24 ByDdSS usc ripa Mu 25 BOOS ee ee ee ee ener 25 Post heating internal coil NV or KWout
9. Range 0 max of unit If 4100122 LS mode if 4050520 Exhaust Supply flow ratio Range 5 999 if 40505721 Percentage of nominal setpoint for extraction Range 1 10096 in 9o units If 4100123 CPs mode if 40443 0 or 1 Exhaust Supply flow ratio Range 5 999 if 40443 2 Percentage of nominal setpoint for extraction Range 1 100 in units 0 999 41 41xx5 41xx6 41xx7 T Setpoint heating T Setpoint cooling Bypass mode Postheat setpoint For NV KWout BA and KWext options In 0 1 C units Range 0 999 meaning 0 99 9 C 0 is OFF Cooling setpoint For BA and BA options In 0 1 C units Range 0 999 meaning O 99 9 C 0 is OFF Selection of the bypass status O Bypass auto based on measured T 1 and T 2 1 Bypass forced to close 2 Bypass forced to open 9 7 2 Time scheduler mapping Register Read Type Description Accepted values 41000 41010 41020 41050 41040 41050 41060 41070 41080 41090 41100 41110 41120 41130 41140 41150 41160 41170 41180 41190 41200 41210 41220 41230 41240 41250 41260 41270 41280 41290 41300 41310 41320 41330 41340 41350 41360 42 41007 41017 41027 41037 41047 41057 41067 41077 41087 41097 41107 41117 41127 41137 41147 41157 41167 41177 41187 41197 41207 41217 41227 41237 41247 41257 41267 41277 4128
10. 12V closed force start the supply fan s at pre programmed airflow e 12V open force stop the supply fan s INS 12V closed force start the exhaust fan s at pre programmed airflow e IN8 12V open force stop the exhaust fan s Registers 40222 40226 and 40227 can be used instead of IN3 IN7 et INS Type 7 Alarm indicating maintenance is expected for configuration see advanced setup MAINTENANCE ALARM indicates the fan operating time in hours has exceeded a certain limit set during the configuration STOP FAN indicates the fan operating time in hours has exceeded a certain limit set during the configuration This alarm stops the fans See 7 in table below 40303 register bit 4 5 Type 8 Alarm indicating a communication breakdown between the TAC4 DG circuit and the RC TAC4 This alarm indicates a communication problem between the 2 modules of the TAC4 DG regulation It is only displayed on the RC TAC4 not via the MODBUS communication See 8 in table below Type 9 Alarm indicating a T sensor T1 T2 T3 failure One or more of the T sensors T1 T2 T3 connected to the TAC4 DG circuit and mounted on heat exchanger is defect or not connected These sensors are crucial for the by pass control and the antifrost procedure After correction of the failure it is necessary to perform a RESET via the 40250 register or via the RESET button on the TAC4 DG circuit See 9 in table below 40300 register bi
11. 7 41297 41307 41317 41327 41337 41347 41357 41367 m RAW RAN R W R W R W R W R W R W R W R W R W R W R W R W R W R W R W R W R W R W R W R W R W R W R W R W R W R W R W R W R W R W R W R W R W X E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 Parameters for Monday Time segment 1 Parameters for Monday Time segment 2 Parameters for Monday Time segment 3 Parameters for Monday Time segment 4 Parameters for Monday Time segment 5 Parameters for Monday Time segment 6 Parameters for Tuesday Time segment 1 Parameters for Tuesday Time segment 2 Parameters for Tuesday Time segment 3 Parameters for Tuesday Time segment 4 Parameters for Tuesday Time segment 5 Parameters for Tuesday Time segment 6 Parameters for Wednesday Time segment 1 Parameters for Wednesday Time segment 2 Parameters for Wednesday Time segment 3 Parameters for Wednesday Time segment 4 Parameters for Wednesday Tim esegment 5 Parameters for Wednesday Time segment 6 Parameters for Thursday Time segment 1 Parameters for Thursday Time segment 2 Parameters for Thursday Time segment 3 Parameters for Thursday Time segment 4 Parameters for Thursday Time segment 5 Parameters for Thursday Time segment 6 Parameters for Friday Time segment 1 Parameters for Friday Time segment 2 Parameters for Friday Time segment 3 Parameters for F
12. C 999 means open circuit 999 means short circuit Status of digital outputs on the TAC4 DG circuit block 0 Bitmap with 1 bit per input 1 ON Bit 0 1 alarm 1 alarm Bit 1 BYPASS 1 O closed 1 open Bit 2 BYPASS 2 not used always on Bit 3 CT O closed 1 open Bit 4 KWin O inactive 1 active Bit 5 KWout O inactive 1 active Bit 6 OR1 SAT pressure alarm O inactive 1 active Bit 7 OR2 SAT fan on O inactive 1 active Bit 8 OR3 SAT water pump NV O inactive 1 active Bit 9 ORA SAT bypass status O inactive 1 active Bit 10 SAT BA WP O inactive 1 active Analog output OUT1 Image of the flow or pressure of one fan to be configured in advanced setup In 0 1V units range 0 100 meaning 0 0V 10 0V 0 10V 0 Max airflow or pressure of the fan Analog output OUT2 Image of the flow or pressure of one fan to be configured in advanced setup In 0 1V units range 0 100 meaning 0 0V 10 0V 0 10V 0 Max airflow or pressure of the fan 0 100 0 100 0 100 999 999 999 999 999 999 999 999 999 999 999 999 999 999 0 2047 0 100 0 100 40172 R E1 Analog output OUT4 NV 0 100 Postheat NV option opening of the 3 ways valve In 0 1V units range 0 100 meaning 0 0V 10 0V 40174 R E1 Analog output OUT7 0 100 Postheat cool BA or BA option opening of the 3 ways valve In 0 1V units r
13. KWout regulation option prewired AL1 DEFAULT ALARM B A GND 12V connection to the RC TAC4 K1 CA MODE mh K1 LS CPs MODE START STOP K2 CA MODE m h K2 LS CPs MODE 0 10V INPUT K3 CA MODE m n K3 LS CPs MODE ON K3 IN1 Master selection IN2 dPa external pressostat digital input IN3 Fire alarm IN4 Bypass INS Real time clock auto manu ING ON OFF post heating NV KWout IN ON OFF SUPPLY if fire alarm IN8 ON OFF EXHAUST if fire alarm INS BOOST OUT1 0 10V OUTPUT airflow pressure OUT2 0 10V OUTPUT airflow pressure O R 1 output relay 1 SAT3 PRESSURE ALARM O R 2 output relay 2 SAT3 FAN ON O R 3 output relay 3 SAT3 WATER PUMP for NV option O R 4 output relay 4 SAT3 BYPASS STATUS SAT MODBUS option see installation manual SAT BA KW option see installation manual 4 Regulation 4 1 Fans working mode The various working modes give the user the choice on how the airflow must be modulated according to your application In all the working modes the supply fan will operate according to the assigned mode and parameters The airflow of the exhaust fan will then equal to a percentage of the actual airflow of the supply fan noted EXT PUL for ratio between exhaust and supply airflows The RC TAC4 allows configuration of one of the following 4 modes 4 1 1 CA mode 3 constant airflow assignments for the supply fan are dete
14. PID Td In sec units 40526 R W E1 NV option 1 10 Postheat NV speed Range 10 1 10 fastest 1 slowest 40527 R W E1 KWout option 1 100 Postheat KWout PID PB Gain 100 PB In units 40528 R W E1 KWout option 0 9999 Postheat KWout PID Ti In sec units 40529 R W E1 KWout option 0 9999 Postheat KWout PID Td In sec units 39 40590 40531 40532 40533 40534 40535 40536 40537 40538 40539 40540 40541 40542 40543 40546 40547 40548 40549 40550 40551 40 R W R W R W R W R W R W R W R W R W R W R W R W R W R W R W R W R W R W E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 Analog output OUT 1 Selection of the parameter to be sent on OUT1 02m3 h F1 1 Pa F1 2 m3 h F2 3 Pa 4 m3 h F3 5 Pa F3 6 m3 h F4 7 Pa F4 Analog output OUT2 Selection of the parameter to be sent on OUT2 0 m3 h F1 1 Pa F1 2 m3 h F2 3 Pa F2 4 m3 h F3 5 Pa F3 6 m3 h F4 7 Pa F4 Post ventilation Activation of the post ventilation O NO 1 YES Post ventilation Selection of the post ventilation time In sec units Fan run time Activation of the telling of the working hours of the unit O NO 1 YES Fan run time To display the working hours on the RC or GRC TAC4 0 NO 1 YES Fan run time To activate a SERVICE alarm after a predetermined time O NO 1 YES Fan run tim
15. cannot be fulfilled because the upper or lower limit of the fan s working zone has been reached See 4 in table below 40301 register bit 8 to 15 and 40302 register bit 0 to 11 Type 5 Alarm indicating a data failure in the control circuit Crucial data from the circuit board has been lost Try a TOTAL RESET of the data using the 40251 register If still not solved send the defect TAC4 DG circuit for reprogramming See 5 in table below 40301 register bit 0 1 Type 6 Fire Alarm See 6 in table below 40303 register bit 7 8 The TAC4 DG control can be connected to an extern fire detection system to stop start the supply exhaust fans according to fire regulations set the airflows in case of fire alarms according to fire regulations allow firemen to overrule the existing setup and start stop the fans as needed After a fire alarm it is necessary to perform a RESET via the 40250 register or via the RESET button on the TAC4 DG circuit to return to normal operation The fire alarm and of start stopping of the fans supply exhaust can be activated by external contacts see wiring diagram below or through MODBUS communication registers 40222 40226 and 40227 15 Wiring diagram 12V IN1 IN2 IN3 IN4 INS IN6 INT INY 12V IN3 12V fire alarm contact The contact can be normally open factory set or normally closed change setting via register 40510 If alarm activated via IN3 e N7
16. conditions LED AF is blinking All these temperature SET values can be modified using ADVANCED SETUP Antifreeze diagram LED AF ON gt LED AF blinking 4 5 2 Antifrosting the heat exchanger with 1pre heating KWin option If a KWin pre heating coil is option is installed in the maxi unit the heat exchanger is protected from frosting by a modulating electrical coil assigned to maintain a pre set temperature at the outlet of the heat exchanger in the exhaust airflow The KWin is delivered ready to use from the factory The default assignment T after heat exchange is 1 C If necessary this value can be changed using the ADVANCED SETUP feature TAC4 DG regulation antifrost functions e A solid state relay controlled by the TAC4 DG regulation controls the coil s capacity in function of the assigned T and of resulting exhaust T e The control only allows the heating coil to be operated if the supply fans are in working This wiring is factory made Post ventilation feature see advanced setup If the fans are requested to stop the R3 relay is opened and therefore the power supply to the coils is also shut down The fans continue running for 90 seconds to insure post ventilation of the electrical coils e f conditions make that the pre heating coil KWin does not deliver enough capacity to reach the floor T assignment and therefore not insuring the anti frost duty the control will modulate the in and out airflo
17. supplying electric coil This is factory pre wired A post ventilation of the coil function is available see advanced configuration When fans are requested to stop first the electrical coils are shut down then the fan operate for 90 seconds minimum value before stopping This feature cools the coils before actually stopping the fans tis possible to stop the post heating with an external contact IN6 see detail in the S 4 6 1 or via the 40225 register e Setpoint alarm see details in section 4 9 1 and 4 9 2 e Sensor alarms see details in section 4 9 1 and 4 9 2 4 6 1 Wiring diagrams e Wiring the supply T sensor to the TAC DG board 3 ESEJESESESEA3ESIESESESIES Bes Bee o o o o o oiojoljolo o olo o o o9 o0 j o o o K1 K2 K3 12V 12V IN1 IN2 IN3 IN4 5 IN6 INT 8 IN9 12V GND T 5 GNDOUT1 OUT2 Sonde T T Sonde T sensor 11 e Possibility to stop the post heating with an external contact 12V INT IN2 IN3 IN4 INS IN6 INT 8 12V Contact closed post heating OFF Contact open post heating ON 4 7 Post heating NV option regulation The post heating coil is delivered pre wired The 3way valve is delivered unmounted The NV option on the TAC4 DG regulation allows to maintain a pre set supply T constant The assignment T is set using the 40425 register Control features of the TAC4 DG Monitoring the 3 way valve to keep assignment T co
18. unit For CA mode only Airflow 1 K1 5 Range 0 9999 40429 RAW E1 Airflow selection 0 max of unit For CA mode only Airflow 2 K2 Pos Il Range 0 9999 40430 RAW E1 Airflow selection 0 max of unit For CA mode only Airflow 3 K3 Pos Ill Range 0 9999 40431 R W E1 Pressure alarm selection 0 or 1 For CA and LS mode only Pressure alarm selection O No pressure alarm 1 Pressure alarm selected 40432 R W E1 Pressure alarm data 25 999 For CA and LS mode only Pressure offset on supply increase of pressure In Pa units 40433 R W E1 Pressure alarm data 25 999 For CA and LS mode only Pressure offset on exhaust increase of pressure In Pa units 40434 R W E1 Pressure alarm data min max of For CA and LS mode only unit Reference flow on supply for pressure alarm In m3 h units 40435 R W E1 Pressure alarm data 0 max of unit For CA and LS mode only Pressure at reference flow on supply In Pa units 40436 R W E1 Pressure alarm data min max of For CA and LS mode only unit Reference flow on exhaust for pressure alarm In m3 h units 40437 R W E1 Pressure alarm data 0 max of unit For CA and LS mode only Pressure at reference flow on exhaust In Pa units 40438 R W E1 Signal link data 0 100 For LS mode only Minimum signal value Vmin In 0 1V units 0 100 meaning 0 10 0V 40439 R W E1 Signal link data 0 100 For LS mode only Maximum signal value Vmax In 0 1V units 0 100 meaning 0 10 0V 40440 R W E1 Si
19. 0 Select Airflow 1 40428 Select Airflow 3 40430 Control 40200 Selection of airflow selection position OFF I ou III 40201 7 2 3 LS mode Setup 0 Select minimum signal Vmin 40438 Select airflow corresponding to Vmin 40440 Select unbalance ratio exhaust supply 40427 Value of the voltage lower threshold 40501 Value of the voltage upper threshold 40503 Possibility to separately control exhaust signal on K3 and 40505 supply signal on K2 airflows Control 40200 Select ventilation position OFF or Ill 40201 7 2 4 CPs mode Setup 40426 Choice of the flow of regulation impulse and or extraction 40443 IF CPs applied to one airflow side supply or exhaust Select reduced airflow for position Ill 40442 Select assignment value to be kept constant 40446 Select initialization airflow 40254 If manual configuration Enter setpoint value to be kept constant in the exhaust airflow 40449 22 Enter nominal supply airflow for initialization procedure 40254 Alarm while initialization procedure of setpoint pressure value 40302 bit12 to 15 40303 bit 0 to 3 Control 40200 Select ventilation position OFF ou III 40201 7 3 Viewing of fan data Ventilation Position OFF Il HI 40053 Exhaust airflow assignement 40057 Actual pressure on supply fan 1 40066 Actual pressure on supply fan 2 40070 Actual pressure on exhaust fan 1 40074 Actual pressure on exhaust fan 2 40078
20. 2 Season Managements are een 43 Season management structure uuessusseonennnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnennnnnnnnnnnnnennnnnnennn 43 SEASON segment MAPPING cccccsesccccseseecceeececcesecccsuseeecseseecseaueeecsageeessaaseesseueesssegeeessaaes 43 0 Preamble PLEASE READ THIS MANUAL CAREFULLY BEFORE INASTALLATION AND COMMISSONING THIS MANUAL HAS BEEN MADE WITH GREATEST CARE HOWEVER NO RIGHTS CAN BE DERIVED THEREFROM WE RESERVE THE RIGHT AT ANY TIME TO PARTIALLY OR ENTIRELY CHANGE THE CONTENT OF THIS MANUAL WITHOUT PRIOR NOTICE This manual contains all the best for an assembly plant and a heat recovery unit HRU necessary information The manual also serves as a handbook for installation maintenance and customer service work We recommend that any intervention in the appliance installation company should be consulted Subject of this operating manual is the control unit TAC4 when connected to an external monitoring system communicating in MODBUS via the SAT MODBUS Possible accessories are only described insofar as it is necessary for the appropriate operation Please see the particular manuals for further information on accessories If you have any questions that have not been answered or have not been sufficiently answered in this documentation please contact the company Paul Warmeruckgewinnung GmbH We will be glad to help yOu 1 Introduction 1 1 Safety Please always observe the safety inst
21. 2 gt T1 1 C requirement In 0 1 C units Range 50 270 meaning 5 0 27 0 C 40514 R W E1 Bypass data 60 280 T 2 value T2 must be gt T1 1 C In 0 1 C units Range 60 280 meaning 6 0 28 0 C 40515 R W E1 Bypass data 0 or 1 To force airflows when bypass is open O NO 1 YES 40516 R W E1 Bypass data min max of If 40515 1 Supply airflow when bypass is open unit 0 In m3 h units 40517 R W E1 Bypass data min max of If 40515 1 Exhaust airflow when bypass is open unit O In m3 h units 40518 R W E1 KWin option 99 99 Preheat setpoint of the air air exchanger antifreeze protection In 0 1 C units Range 99 99 meaning 9 9 9 9 C 40519 R W E1 Antifreeze air air exchanger 0 or 1 Activation of the antifreeze protection O NO 1 YES 40520 R W E1 Antifreeze air air exchanger 10 30 T LOW Antifreeze T HIGH is raised if required to meet the T HIGH gt T LOW 1 C requirement In 0 1 C units Range 10 30 meaning 1 3 C 40521 R W E1 Antifreeze air air exchanger 10 50 T HIGH T HIGH must be gt T LOW 1 C In 0 1 C units Range 10 50 meaning 1 0 5 0 C 40522 R W E1 Antifreeze air air exchanger 0 or 1 Allow supply airflow to be stopped if T 3 lt T7LOW O NO 1 YES 40523 R W E1 KWin option 1 100 Preheat KWin PID PB Gain 100 PB In units 40524 R W E1 KWin option 0 9999 Preheat KWin PID Ti In sec units 40525 R W E1 KWin option 0 9999 Preheat KWin
22. AC4 DG regulation The actual fan startup is delayed to allow prior opening of dampers When fans are stopped the dampers are closed 4 5 Heat exchanger antifrost protection system There is a risk of frosting the heat exchanger in the exhaust airflow Two antifrost protection systems are available e Supply air volume reduction less cooling capacity e Modulation of capacity of an electrical coil located before the inlet air enters the heat exchanger KWin option 4 5 1 Protection antifreeze via pulse flow reduction This functionality is built in the standard TAC4 DG and must not be configured by the installer It is automatically de activated if an optional KWin pre heater see 3 5 2 is installed in the unit Description In order to avoid the risk of frosting the heat exchanger the supply airflow is linked to the temperature value of the exhaust airflow measured after the heat exchanger sensor T3 T3 gt 3 C the assigned airflow is as defined by SETUP e 0 C lt T T3 lt 3 C the airflow assigned by SETUP is automatically modified as follows IF CA or LS working mode the supply airflow will progressively drop down to 33 AF iow of the assigned airflow AF If CPs mode the assigned pressure will drop to 50 of the assigned pressure AF In these conditions LED AF is ON e T3 lt 0 C the supply airflow is stopped for as long as T T3 lt 1 C during 5 minutes In these
23. Select supply airflow when bypass open 40516 Control Visualization Bypass status 40084 7 8 Boost Setup 40548 Enter BOOST exhaust airflow rate when activated 40549 Control Force activation of BOOST airflow 40228 7 9 Post heating internal coil NV or KWout option Setup Select assignment value for supply air T 43442256 Control De activate post heating function 425 Display 40059 00 If NV option age of opening of 3 way valve 40172 40187 0 Supply air temperature T 5 40159 40083 7 10 Post heating or cooling external coil SAT BA KW option Setup Enter supply airflow setpoint temperature for heating 40425 25 Control Disable post heating ss 40225 Disable post cooling 40229 Select heating or cooling method 4023800 Display If BA or BA option age opening of 3 way valve 40174 If KWext option actual age of maximum capacity of KW coil 40188 Antifrost status of external water coils 40088 7 11 Run time and maintenance alarm Setup Display run time on RC TAC4 40535 Hour count limit for maintenance alarm 40537 Hour count limit for maintenance alarm with fan stop 40540 Control RESET hour count 402520 Display Hour count of unit 40084 Status of maintenance alarm 40303 bit 4 and 5 7 12 Operating with time tables TAC4 units can operate automatically according to a timetable The timetable features a 7 days 6 timeslots per day programm
24. TAC4 DG MODBUS RTU Installation and user s manual Operating INnsvrucwons Please keep carefull Status 06 2013 Paul Warmeruckgewinnung GmbH August Horch Stra e 7 08141 Reinsdorf Germany Tel 49 0 375 303505 0 WARMER CKGEWINNUNG Fax 49 0 375 303505 55 Table of contents 1 1 1 2 N NA PPPPPPRH LI RWWNND oS feo ae O A W N A gl erebm EIE 3 INTLOQUCHON 3 ne aioe 3 Used SymMDOIS nee 3 Functionalities of the regulation uus uauu0000aa000nnnnnunnnnnnnunnnnnnnnnnnnnunnnnnnnunnnnnnnnnnnnnnnnnnnnenn 4 Generell maintenance instructions uuuuuu000ennnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnennnnnn 5 eris Eiuesdpnrziie E E LT 5 Generell schematic of the maxi series 0022200022000nennennnnnennnnnennnnnonnnnn nennen nase nennen 5 Schematic of the T sensors positioning in the maxi 6 Control panel 3 label located inside the 6 REQUIALION moe D eich 7 Falls WORKING LL T E duni UM c uM uie Da 7 ES Inode
25. airflow after the heat recovery indicating that the KWin has reached its limit the TAC4 DG control can take over to guarantee the antifrost function a Alarm type 13 If T lt assignment T 1 5 C for more than 5 minutes supply and exhaust airflow reduction of 33 if CA or LS and of 25 if CPs for 15 minutes b Alarm type 14 If T lt 5 C during 5 minutes fans are stopped It is necessary to perform a RESET via the 40250 register or press RESET on the TAC4 DG circuit to restart the unit See 13 amp 14 in table below 40303 register bit 11 12 4 10 2 Alarm table mi Actions on RC TAC4 Actions on the TAC4 DG circuit if connected Type Display 1 n LED Pa LED R2 relay LED AF ALARM ALARM aid of SAT3 O R 1 ALARM Alarm Stopped FANx status 2 PRESSURE Rouge ON Closed ALARM 2 3 ALARM Red ON Alarm Stopped INIT Pa status 4 ALARM ON CA LS or CPs 5 DATA Red ON Alarm j Stopped ERROR status 6 FIRE Red Alarm Stopped ALARM status 3 7 ALARM Red ON Alarm SERVICE status FAN STOP Red ON Alarm Stopped SERVICE status 8 CB COM Red i ERROR 9 ALARM T Red ON Alarm Stopped SENSOR status 1 2 3 10 ALARM T Red ON Alarm i SENSOR 4 status 11 ALARM T Red ON Alarm SENSOR 5 status 12 ALARM Red ON j POSTHEAT T TOO LOW 13 AF T Red ON ON Reduced ALARM airflow AIRFLOW REDUCED 17 no act
26. ange 0 100 meaning 0 0V 10 0V 40175 R E1 Analog output OUTS 0 100 Postcool BA option opening of the 3 ways valve In 0 1V units range 0 100 meaning 0 0V 10 0V 40186 R E1 output KWin 0 100 Preheat KWin option power of the electric coil In units range 0 100 meaning 0 100 40187 R E1 output KWout 0 100 Postheat KWout option power of the electric coil In units range 0 100 meaning 0 100 40188 R E1 output external KW SAT BA KW 0 100 Postheat SAT KW option power of the electric coil In units range 0 100 meaning 0 100 9 3 Control Register Read Type Description I alues 40200 Selection of the control master who will determine speed 0 1or2 0 RC TAC4 determines speed 1 MODBUS determines speed via register 40201 2 TIMETABLE determines airflows automatic working 3 MODBUS determines airflows via registers 40204 40205 40201 R W R Speed selection via Modbus only if 40200 1 0 1 20r 3 0 STOP 1 LOW pos 2 MEDIUM pos Il 3 HIGH pos Ill 40204 R W R Supply airflow selection via Modbus only if 40200 3 min max of Range 0 9999 unit O 40205 R W R Exhaust airflow selection via Modbus only if 40200 3 min max of Range 0 9999 unit O 40221 R W R External pressure alarm 0 or 1 OzNo alarm 1 Pressure alarm activated 40222 R W R Fire alarm 0 or 1 OzNo alarm 1 Fire alarm activated 40223 R W R Bypass control 0 or 1 O Bypass auto based on measured T 1 and T 2 1 Bypa
27. arm data O max of unit Supply reference flow for pressure alarm in m3 h 40062 R E1 Pressure alarm data O max of unit Supply reference pressure for pressure alarm in Pa 30 40065 40064 40065 40066 40067 40068 40069 40070 40071 40072 40073 40074 40075 40076 40077 40078 40079 40080 40081 40082 40083 40084 40085 40086 40087 40088 40089 40090 40150 A JUuuyruuuuuuuuuuuuuunururn E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 Pressure alarm data Exhaust reference flow for pressure alarm in m3 h Pressure alarm data Exhaust reference pressure for pressure alarm in Pa Fan 1 Supply 1 flow Fan 1 pressure Fan 1 torque Range 0 255 127 50 Fan 1 RPM Fan 2 Supply 2 flow Fan 2 pressure Fan 2 torque Range 0 255 127725096 Fan 2 RPM Fan 3 Exhaust 1 flow Fan 3 pressure Fan 3 torque Range 0 255 12725096 Fan 3 RPM Fan 4 Exhaust 2 flow Fan 4 pressure Fan 4 torque Range 0 255 127 5096 Fan 4 RPM working hours of the unit RUN TIME xxxxxx h 32 bit value in 2 words Antifreeze status O OFF 1 antifreeze of the air air heat exchanger is activated 2 antifreeze of the warm water heat exchanger is activated Bypass status O CLOSED 1 OPEN CTin option Damper status O CLOSED 1 OPENING 2 OPEN post ventilation status O NO 1 active Current cont
28. aust and supply airflows exhaust supply e Bypass status choose either automatic see 3 7 or either force the bypass to open or close for the TS considered e f post heating installed option set the assignment t for the supply air for the TS considered e f post cooling installed option set the assignment t for the supply air for the TS considered Seasonal management is also possible e Force bypass close between 2 dates avoid free cooling in the winter e Disable the post heating feature between 2 dates avoid post heating in the summer e Disable the post cooling feature between 2 dates avoid cooling in the winter 4 10 Alarms 4 10 1 Alarm types Type 1 Alarm indicating a fan failure This alarm indicates a failure of fan Fx This problem is usually caused by the motor If not the failure can be caused by an internal cable or by the TAC4 DG circuit See 1 in table below 40300 register bit 2 3 4 5 in MODBUS table Type 2 Alarm on the pressure variation CA and LS modes only This alarm indicates a pre established pressure level has been reached on fan Fx Pressure alarm setup in CA or LS mode see 7 4 14 See 2 in table below 40300 register bit 6 7 in MODBUS table Type 3 Alarm indicating a problem while initializing reference pressure for a pressure alarm 4 possibilities Actual airflow lt requested airflow The requested working point is too high too much
29. e Time for the SERVICE alarm In hours units 32 bit value in 2 words Fan run time To stop the fans after a predetermined time O NO 1 YES Fan run time Time to stop the fans in SERVICE alarm In hours units 32 bit value in 2 words To display only the alarms on the RC TAC4 Airflows pressures and other parameters are hidden O NO 1 YES MODBUS configuration Modbus Address of the TAC4 circuit Access code for RC TAC4 To require a code to get access to setup menus O NO 1 YES Access code for RC TAC4 Code selection Boost data Supply airflow when Boost is activated In m3 h units Boost data Exhaust airflow when Boost is activated In m3 h units SAT BA KW option external heating or cooling Selection of the external heating or cooling exchanger 0 none 1 BA 2 BA 3 BA BA 2 exchangers 4 BA 1 exchanger for heating and cooling 5 KW 6 KW BA option Cooling BA speed Range 10 1 10 fastest 1 slowest 0 7 Oor 1 0 9999 0 1 0 or 1 0 or 1 0 999999 0 or 1 05999999 0 or 1 1 247 0 or 1 029999 min max of unit O min max of unit O 0 6 40552 R W E1 BA Antifreeze T threshold 0 999 In 0 1 C units Range 0 999 meaning 0 99 9 C BA control enters 15min antifreeze cycle if T7 lt this threshold and OUT7 3V 40553 R W E1 BA Antifreeze T threshold 0 999 In 0 1 C units Range 0 999 meaning 0
30. e contact between terminals 12V and IN5 on circuit the TAC4 DG The RC TACA standard features are then enabled For more information on its use refer to the Operating instructions TAC4 RC documentation available on our www paul lueftung de site 9 Detailed MODBUS table Legend Read Write R Read only R W Read and Write Register type E1 Register in EEPROM memory with endurance of 100 000 write cycles R Register in a non volatile RAM memory 29 9 1 General info Register Read Type Description Accepted alues 40001 Magic number to detect a Lemmens product 19533 40002 Two words First word is 19533 second word is 20051 These are 20051 the ASCII values of LMNS If read as a 32 bit value the value is 1 314 081 869 40003 R E1 Product identification code number of the TAC4 regulation CID Unsigned 0 32767 40004 R E1 Modbus mapping version Unsigned Major 100 minor 0 32767 Example 100 major 1 minor 0 40005 R E1 Software version major 0 99 The software version number scheme is major minor revision Leading zeros are not used Valid versions would be v1 0 0 v1 3 18 or v2 14 6 V1 03 18 would be invalid Each part can be 0 99 at least 40006 R E1 Software version minor 0 99 40007 R E1 Software version revision 0 99 40008 R W E1 Flag indicating that controller has been reset 0 or 1 The modbus master can use this to detect that the controller has reset Flag can be wr
31. f the instructions are not carried out properly 2 Functionalities of the regulation The TAC4 DG controller is mounted in the units of maxi series This handbook describes the functionalities of the regulation when connected to an external monitoring system communicating in MODBUS via the SAT MODBUS option The TAC4 DG controller provides the following features Monitoring of the fans exhaust and supply in chosen working mode constant airflow CA constant pressure CPs or constant airflow linked to 0 10V signal LS Management of 6 timeslots Alarms on defects setpoints overpressure Fire alarm airflow management BOOST function allowing to force a pre set airflow supply exhaust overriding the assigned airflow Automatic management of the 100 bypass to allow free cooling Automatic management of inlet dampers CT Heat exchanger antifreeze protection system by modulation of airflow or with an intelligent pre heat electrical coil KWin Postheating management of water coil NV or electrical coil KWout battery to keep a set temperature constant Display of the settings and working fans Analogical output signals of airflow and pressure Advanced setup The following option can be combined with TAC4 DG controller RC TAC4 Option remote control and visualization of the parameters please refer to TAC4 DG RC TAC4 installation and user s manual for detailed information SAT TAC4 BA KW Option reg
32. gnal link data min max of For LS mode only unit Airflow at Vmin In m3 h units 40441 R W E1 Signal link data min max of For LS mode only unit Airflow at Vmax In m3 h units 40442 R W E1 Sleep mode reduction on K3 1 100 For LS CPf and CPs mode only reduction in of the nominal set point In unit 37 40443 R W E1 Control on supply or exhaust selection 0 1 or2 For CPs mode only Control pressure on the supply and or exhaust flow 0 supply 1 on exhaust 2 on supply and on exhaust 40444 R W E1 Constant pressure data min max of For CPs mode only unit Reference flow 1 used for measuring pressure supply fan flow if CPs on SUP or CPs on SUP EXH exhaust fan flow if CPs on EXH In m3 h units 40446 R W E1 Constant pressure data 0 100 For CPs mode only Reference voltage to keep constant in CPs mode If CPs on SUP EXH reference voltage for Supply flow In 0 1V units range 0 100 is 0 10 0V 40447 R W E1 Cooling setpoint 0 999 For BA and BA options In 0 1 C units Range 0 999 meaning 0 99 9 C 0 is OFF 40448 R W E1 Constant pressure data min max of For CPs mode only unit Reference flow 2 used for measuring pressure exhaust fan flow if CPs on SUP EXH In m3 h units 40449 R W E1 Constant pressure data 0 100 For CPs on SUP EXH only Reference voltage for exhaust flow to keep constant In 0 1V units range 0 100 is 0 10 0V 9 6 ADVANCED SETUP m values 40500 Stop the fa
33. in CPs mode only CPs on SUP run supply with reference flow set in 40254 run exhaust with ratio measure K2 voltage store reference voltage CPs on EXH run exhaust with reference flow set in 40254 run supply with 1 ratio measure K2 voltage store reference voltage CPs on SUP EXH run supply with reference flow set in 40254 run exhaust with reference flow set in 40257 measure K2 voltage for supply measure K3 voltage for exhaust store reference voltage Working mode is set to 9 during the initialization Read Ozidle 1 start Write 1 to start 34 9 4 Alarms See our Alarm document for more details Register Read Type Alarm bits Accepted Write Alarm flags are bits in holding registers 1 bit per alarm 16 values alarms per register Bit is 1 if alarm is active Read only 40300 R E1 ALARM PROGRAM ERROR 0 65535 Bit 1 ALARM DATA ERROR Bit 2 ALARM Bit 3 ALARM FAN2 Bit 4 ALARM FAN3 Bit 5 ALARM 4 Bit 6 ALARM PRESSURE Bit 7 ALARM PRESSURE F3 Bit 8 ALARM T1 OPEN Bit 9 ALARM T1 SHORT Bit 10 ALARM T2 OPEN Bit 11 ALARM T2 SHORT Bit 12 ALARM T3 OPEN Bit 13 ALARM T3 SHORT Bit 14 ALARM T4 OPEN Bit 15 ALARM T4 SHORT 40302 R E1 ALARM LS 3 LOW 0 65535 Bit 1 ALARM LS FAN 3 HIGH Bit 2 ALARM LS FAN 4 LOW Bit 3 ALARM LS FAN 4 HIGH Bit 4 ALARM CA FAN 1 LOW Bit 5 ALARM CA 1 HIGH Bit 6 ALARM CA FAN 2 LOW Bit 7
34. ing For each time slot it is possible to configure the working mode and its different parameters the supply air T setpoint heating and cooling and the status of the bypass Setup See MODBUS 10 7 table below 41000 41417 Control Enable automatic operation 4020 7 13 Seasonal programming 3 features can be en disabled during certain periods of the year The bypass the post heating and the post cooling Configure a time period between 2 dates and enter feature status i e closed position for the Bypass and OFF for the heating or cooling regardless of the configuration and actual temperature values 26 Setup Enter time periods for BYPASS see MODBUS table 810 3 below 41800 41803 Enter time periods for post heating see MODBUS table 10 8 below 41804 41807 Enter time periods for post cooling see MODBUS table 10 8 below 41808 41811 7 14 ADVANCED SETUP Other parameters and advanced functionalities are accessible via MODBUS They require a thorough knowledge of the regulation You can find the details concerning these parameters in the detailed MODBUS table or in document Operating instructions maxi series available on our www paul lueftung de site Fans start torque Prevent stop of the fans Configuration of AF anti frost of coils Reaction speed of modifications on post heating cooling OUT1 and OUT2 definition In mode CPs positive or negative logic reaction speed of the CPs algorithm Post ventilatio
35. ing to inside and outside temperatures the TAC4 DG control will monitor the opening closing of the 100 by pass damper The by pass is delivered completely wired and motorized from factory No wiring or installation is required by the installer The O R 4 relay SAT3 option of the TAC4 DG circuit indicates the opening closing of the bypass Operating description e Opening of 100 by pass if all following conditions are met Outside T sensor lt inside T sensor T2 1 C Outside T sensor T1 gt 15 C Inside T sensor T2 gt 22 C Closing of 100 by pass if one of the following conditions is met Outside T sensor T1 gt inside T sensor T2 Outside T sensor T1 14 C Inside T sensor T2 20 C these temperature SET values can be modified using ADVANCED SETUP When the bypass is open the pressure alarm is deactivated For the maxi 4002 and maxi 6002 models the maximum airflow when the bypass is open is reduced respectively at 3500 m h and 5300 m h For the other models there is no reduction of the maximum airflow when the bypass is open Bypass status BYPASS BYPASS OPENED CLOSED 4 3 BOOST function The BOOST function allows forcing a preset airflow overruling all other configurations 4 4 Opening closing of dampers CT option at inlet The opening and closing of a damper s mounted at both supply and exhaust air inlets are automatically managed by the T
36. ion 1 detailed text is displayed in successive screens 2 Unless setup configuration stipulated fans must be stopped in the event of pressure alarm 3 Stopping of the fans in function of entries IN7 IN8 and or the 40226 and 40227 registers 4 10 3 Wiring diagrams Option Optie SAT3 230Vac 4A Sp cifications voir manuel d installation SAT3 Specificaties zie SAT3 handleidingsmanued Specifications see SAT3 installation manual AL1 OFF AL APa or POWER OFF 4 11 Plugin the SAT MODBUS satellite The MODBUS RTU communication with the TAC4 DG requires the addition of a satellite circuit option SAT MODBUS CID 025006 being used as interface of communication A The assembly must be carried out with the power OFF A bad positioning of SAT MODBUS on circuit TAC4 DG can fatally damage both circuits LI wet KA 3 ND HN 18 4 12 Wiring the SAT MODBUS a Wiring one unit SAT MODBUS A B GND A B GND LLL MODBUS MASTER GND b Network wiring SAT MODBUS 1 SAT MODBUS 2 A B GND A B GND u MASTER GND 5 Definition of the MODBUS RTU communication 5 1 MODBUS protocol The TAC4 DG controller uses the communication protocol MODBUS RTU This protocol is based on a master slave architecture Each message has the same structure the frame is made of the slave address the function code writing or reading the data and a
37. is possible to control one or two external from the unit heat exchanger s One heating coil e One water cooling coil e One heating cooling coil reversible coil One heating coil one cooling coil separate e One electrical coil e One electrical coil one cooling coil SAT TACA BA KW Controls the coils capacity by keeping a supply air temperature constant equals to the assignment This assignment can be defined for each coil when configuring the setup Controls the water coils antifrost protection e Triggers command for circulator s Cooling Heating mode control by digital entry An extra external system determining in which mode heat cool the coil must operate and delivering the information free of potential contact to the SAT TACA BA KW is necessary e Allows shutting down the coils via digital input te For connections configuration and user instructions see installation manual SAT TAC4 BA KW 4 9 Time slots schedules The TAC4 DG regulation allows to configure up to 6 time slots per day For each time slot select e The exhaust and the supply airflows Working mode CA LS CPs or OFF CA mode select the actual exhaust and supply airflow LS mode select a value of the link configured as well as a age value of the unbalance between exhaust and supply airflows exhaust supply CPs mode select a age value of the reference pressure as well as 8 age value of the unbalance between exh
38. itten to zero by the master 9 2 Visualization Register Read Type Description Accepted alues 40020 Factory configuration REC TYPE 32 bit value in 40021 32 bit value in 2 words 2 words 40022 R E1 Factory configuration PREHEAT OPTION 0 or 1 O OFF 1 ON KWin 40023 R E1 Factory configuration POSTHEAT OPTION 0 1or2 O OFF 1 ON KWout 2 ON NV 40024 R E1 Factory configuration CT IN damper OPTION 0 or 1 O NO 1 YES 40052 R E1 Current Working Mode 0 1 20r4 O OFF 1 CA 2 LS 4 CPs 9 INIT temporary mode during init of pressure alarm or init of CPs mode 40053 R E1 Current speed as stop low medium high 0 1 20r3 0 STOP 1 LOW I 2 MEDIUM II 3 HIGH III 40054 R E1 Current setpoint 0 9999 Range 0 9999 40055 R E1 Current Setpoint SET VAL unit 0 10r2 02m3 h 1 Pa 2 0 1V 40056 R E1 Current setpoint for pulsion fans F1 F2 0 max of unit Can be m3 h Pa or 0 1V unit 40057 R E1 Current setpoint for extraction fans F3 F4 0 max of unit Can be m3 h Pa or 0 1V unit 40058 R E1 Preheat option KWin 99 99 Temperature setpoint in 0 1 C units Range 99 99 meaning 9 9 9 9 C 40059 R E1 Heating or cooling option KWout NV and SAT BA KW 0 999 Temperature setpoint in 0 1 C units Range 0 999 meaning O 99 9 C 0 means supply heating and cooling are OFF 40060 R E1 Current Exhaust Supply ratio unbalance between exhaust and 5 999 supply flows in 90 Range 5 999 40061 R E1 Pressure al
39. lic redundancy check checksum as an error detection mechanism to ensure the reliability of data In the Modbus org standard documents holding register addresses are given a prefix of 4 to distinguish them from other register types For example in their documentation a holding register at address 1001 is referred to by 41001 However the leading 4 is not really part of the address Also the Modbus org standard documents refer to register addresses using one based numbering However the addresses that are actually sent in a Modbus command message are zero based For example to read register 1001 the address that is actually sent in the command message is 1000 5 3 MODBUS exception The TAC4 modbus protocol may respond with an exception code if the read or write command was invalid Possible exceptions are e 01 ILLEGAL FUNCTION The function code received in the query is not an allowable action for the slave e 02 ILLEGAL DATA ADDRESS The data address received in the query is not an allowable address for the slave Or the combination of data address and transfer length is not allowable e 03 ILLEGAL DATA VALUE The master attempted to write a non allowed value into a register Which values are allowed may depend on configuration settings of other registers When a write of multiple registers is executed the execution stops at the first invalid data address or invalid value 5 4 MODBUS values All values are signed values As
40. n configuration e Access code configuration e Factory reset 8 Use of RC TAC4 remote control It is possible to connect an RC TAC4 remote control while communicating via MODBUS The RC could be used in two manners e RC is master the RC ensures the configuration the control of the flows and visualization MODBUS is master the RC only ensures displays the parameters It will be used mainly for display of information It is however possible to take control of the system with the RC TAC4 configuration and control via entry IN5 8 1 Connecting the RC TAC4 to the CB4 TAC4 DG circuit The connection between the various circuits is made by a communication bus Follow these steps to connect the RC TAC4 to the CB4 TAC4 DG 27 8 2 Open the RC TAC4 casing Using a small screwdriver unlock the 4 pins 2 pins on each side AMES caver Points for fixation of the casing spacing 88mm RC dimensions 122 x 66mm RC TAC4 wiring terminals The RC box is class IP20 and cannot be installed outdoors as such If you wish to install it outdoors for instance on the maxi unit you need to fasten inside a proper watertight box The configuration data is stored in the TAC4 DG circuit Therefore unlike the previous generation the RC does not have to be permanently connected for the regulation to operate properly 28 8 2 1 Wiring diagram to connect the RC TAC4 REC to the TAC4 DG circuit TAC4 DG RC TAC4 ojo jo jo
41. ns in pressure alarm 0 or 1 For CA and LS mode only O NO 1 YES 40501 R W E1 Stop the fans if signal on K2 is lower than Vlow 0 or 1 For LS mode only O NO 1 YES 40502 R W E1 If 40501 is 1 value of Vlow 0 100 For LS mode only In 0 1V units range 0 100 meaning 0 10 0V 40503 R W E1 Stop the fans if signal on K2 is higher than Vhigh Oor 1 For LS mode only O NO 1 YES 40504 R W E1 If 40503 is 1 value of Vhigh 0 100 For LS mode only In 0 1V units range 0 100 meaning 0 10 0V 40505 R W E1 Signal to control exhaust airflow on K3 0 or 1 For LS mode only 0 1 YES 40506 R W E1 Reaction speed in CPs mode 0 10 For CPs mode only Range 10 0 10 fastest default value O slowest 40507 R W E1 Reaction logic in CPs mode 0 or 1 For CPs mode only O POSITIVE airflow increase if Vk2 gt set point 1 NEGATIVE airflow increase if Vk2 lt set point 40508 RAW E1 Start torque 2 98 In 9o unit 40509 R W E1 FANS OFF allowed 0 or 1 If O the ventilation cannot be stopped above in alarm O NO 1 YES 38 40510 R W E1 Fire alarm normally open or closed contact selection 0 or 1 0 normally open N O 1 normally closed N C 40511 RAN E1 Fire alarm airflow selection min max of airflow for supply unit O In m3 h units 40512 R W E1 Fire alarm airflow selection min max of airflow for exhaust unit O In m3 h units 40513 R W E1 Bypass data 50 270 T 1 value 40514 is raised if required to meet the T
42. nstant using supplied sensor T value e Engaging a relay to start a water circulator output SAT 3 O R 3 on i o module see 4 7 1 e Antifrost protection of the water coil based on the value of T4 T sensor provided and pre wired If value T4 lt 4 C then the 3 way valve is opened and contact for circulator is closed during 15 minutes e tis possible to stop the post heating with an external contact IN6 see detail in the 4 7 1 or via the 40225 register e Setpoint alarm see details in section 4 9 1 and 4 9 2 e Sensor alarms see details in section 4 9 1 and 4 9 2 4 7 1 Wiring diagrams e 3ways valve wiring to TAC DG circuit ID I DO GND OUT4 OUTS NV VO Vanne 3 voies GND blue wire 3 wegkraan NV red wire 3 way valve VO brown wire e Wiring of supply air T sensor to TAC DG circuit ASS Sq um mm mm mm SSeS ie o o o o o olojoljolo ololo o o K2 K3 12V 12V IN2 IN3 IN4 INS IN6 7 INS INS 12V e Switching of a relay to control the circulator SAT3 O R 3 relay BB BB BB BB Circulateur J OFF e Possibility to stop the post heating with an external contact 12V IN1 IN2 IN3 IN4 INS IN6 INT 8 12V Ss Ar ooloj olol o GND T 5 GNDOUT1 OUT2 Sonde T T Sonde T sensor Contact closed post heating OFF Contact open post heating ON 13 4 8 Regelation for external coil s SAT TAC4 BA KW option Via option SAT TAC4 BA KW it
43. numeric test value to test for communication errors CRC16 Main specifications e MODBUS RTU protocol binary e Physical layer RS 485 asynchronous a 3 wire connection with GND is required e Factory default baudrate is 9600 1200 4800 9600 or 19200 are possible 5 2 MOBUS frame The MODBUS frame is presented in the following way 14247 03 06 16 16 bits Controller uses the Modbus RTU time based framing The receiver monitors the elapsed time between receipt of characters If three and one half character times elapse without a new character this is considered to be the end of frame The actual end of frame detection time is rounded to milliseconds because the system timing is millisecond based Address Possible slave address is 1 to 247 Factory default is 1 19 Function code e Supports function code 3 decimal for reading multiple holding registers e Supports function code 6 decimal for writing a single holding registers e Supports function code 16 decimal for writing multiple holding registers Data Number of databits is fixed to 8 Number of stopbits is fixed to 1 All TAC4 data is in 16 bit modbus holding registers Modbus coils discrete inputs or input registers are not used The modbus communication buffers have a size of 129 bytes This is sufficient for reading or writing 60 registers at once Parity Factory default parity is None CRC 16 The RTU format follows the commands data with a cyc
44. pressure for the maximal available pressure at the requested airflow for this fan 40302 register bit 14 15 in MODBUS table Actual airflow gt requested airflow the nominal airflow requested to initialize the pressure alarm cannot be reached because the lower limit of the fan s operating zone has been reached 40303 register bit 2 3 in MODBUS table Very unstable pressure 40302 register bit 12 13 in MODBUS table Assigned airflow not reached after 3 minutes 40303 register bit 0 1 in MODBUS table See 3 in table below Par cannot be identified and the fans are stopped Press RESET using the 40250 register or with the RESET key on the TAC4 DG circuit If it occurs during initializing an alarm pressure 2 options 1 No action is taken the control will operate without pressure alarm 2 Corrective action is taken change the working point to one well located in the working zone of the fan by reducing the pressure system modifying the nominal airflow and restart the setup operation f it occurs during initializing of the assignment pressure in CPs mode A corrective action must be taken change the working point to one well located in the working zone of the fan by reducing the pressure system modifying the nominal airflow and restart the setup operation Type 4 Alarm indicating the system cannot fulfill the assignment The assignment keeping a certain airflow or a certain pressure constant
45. pted alues 41800 41803 Season disable of the bypass 41800 Start date day of month 1 31 41801 Start date month 1 12 41802 End date day of month 1 12 41803 End date month 1 12 Set any of these to 0 to disable seasonal management of the bypass 41804 41807 R W E1 Season disable of the postheating For NV KWout BA and KWext options 41804 Start date day of month 1 31 41805 Start date month 1 12 41806 End date day of month 1 12 41807 End date month 1 12 Set any of these to 0 to disable seasonal management of the postheating 41808 41811 R W E1 Season disable of the cooling For BA and BA options 41808 Start date day of month 1 31 41809 Start date month 1 12 41810 End date day of month 1 12 41811 End date month 1 12 Set any of these to 0 to disable seasonal management of the cooling As of June 3rd 2013 Although we put a lot of care in the making of our documentation we cannot be held responsible for any error and or omissions that could have slipped in 43
46. regulation can be entirely monitored by the MODBUS communication The MODBUS table can thus configure the SETUP advanced SETUP the display setup of all parameters and the control of the operation of the unit airflows and temperatures The MODBUS table is structured as follows Registers Group Read Write 40020 Visualization Read only 40050 Shows actual values of a number of setup 40150 parameters and u nit parameters flows pressures inputs and outputs 40300 Alarms Read only Bitmap with alarm flags 40500 Advanced Setup parameters Read and write 7 Use of MODBUS commands The MODBUS Communication gives access to all the parameters of the regulation You will find below the MODBUS registers associated with the principal functionalities of the TAC4 DG regulation For more details on these registers or for complete information on the parameters accessible via MODBUS see the complete table in 510 7 1 MODBUS address Default MODBUS Address of a TAC4 DG circuit is 1 It is possible to modify this value via an MODBUS command 40543 gt Only connect to the network TAC4 DG circuits with different addresses Setup 7 2 Fans working modes 7 2 1 CA mode airflows are continuously being sent by MODBUS Configuration Control Enter supply airflow OO Enter exhaust airflow 40205 21 7 2 2 CA mode 3 airflow rates Setup ChoseCAmode 1 1 111 11 402
47. rent time month 115 1 January 12 December Do not write the time register cyclically doing so will slow the clock counter 40405 R W E1 Current time year 2000 2099 Do not write the time register cyclically doing so will slow the clock counter 40406 R E1 Current time Day of the week 0 6 0 Monday 1 Tuesday 2 Wednesday 3 Thursday 4 Friday 5 Saturday 6 Sunday This register is read only The weekday is automatically calculated when the date changes Notes on the real time clock e The range of the clock is 1 jan 2000 31 dec 2099 e The date is validated when written e Automatic leap year correction e Automatic Daylight Saving Time DST adjustment following EU rules Adjust 01 00 at 2 00 on the last Sunday in March Adjust 1 00 at 3 00 at the last Sunday in October 40420 R W E1 LANGUAGE 0 1 20r3 language on the Remote control RC TAC4 0 GB English 1 F French 2 D German 3 NL Dutch 40425 R W E1 Postheat setpoint 0 999 For NV KWout BA and KWext options In 0 1 C units Range 0 999 meaning 0 99 9 C 0 is OFF 36 40426 R W E1 FANS WORKING MODE 0 9 O OFF unit is stopped 1 CA constant airflows 2 LS airflow linked to 0 10V input signal 4 CPs constant pressure with sensor 9 INIT 9 is a temporary mode during initialization of pressure for pressure alarm or CPs mode 40427 R W E1 Exhaust Supply ratio 5 999 To create an unbalance between flows 40428 R W E1 Airflow selection 0 max of
48. riday Time segment 4 Parameters for Friday Time segment 5 Parameters for Friday Time segment 6 Parameters for Saturday Time segment 1 Parameters for Saturday Time segment 2 Parameters for Saturday Time segment 3 Parameters for Saturday Time segment 4 Parameters for Saturday Time segment 5 Parameters for Saturday Time segment 6 Parameters for Sunday Time segment 1 0 999 0 10r2 41370 41377 R W E1 Parameters for Sunday Time segment 2 41380 41387 R W E1 Parameters for Sunday Time segment 3 41390 41397 R W E1 Parameters for Sunday Time segment 4 41400 41407 R W E1 Parameters for Sunday Time segment 5 41410 41417 R W E1 Parameters for Sunday Time segment 6 9 8 Season management 9 8 1 Season management structure 3 features can be disabled by the calendar date Each feature can be disabled for a period between 2 dates from Start date to End date 4 are provided to define those 2 dates 418xx Start day Start date for disable of the feature day of the month 418xx 1 Start month Start date for disable of the feature 212 month 418xx 2 End day End date for disable of the feature 1 31 day of the month 418xx 3 End month End date for disable of the feature 1 12 month If these 4 registers are configured the feature is disabled from the start date up to and including the end date Set any of these to 0 to disable seasonal management of this feature 9 8 2 Season ci mapping Read Description Acce
49. rmined by the user m h K1 m h K2 et m h K3 4 1 LS mode The assigned supply airflow is a function of a 0 10V linear signal The user defines the link with 4 parameters Vmin Vmax m h Vmin and m hzVmax applied to the following diagram With m h Vmin or gt m hzVmax positive or negative link Using the advanced setup it is possible to stop the fans once the input signal value has reached a certain upper and or lower limit 4 1 2 1 Wiring diagrams The pressure sensor is connected to entry K2 of the TAC4 DG circuit a Wiring to 1 circuit SSS ESESESESESESESESESESIES ololojojoljojolo jo lo o K1 K2 K3 12V 12V IN1 IN2 IN3 IN4 INS IN6 IN7 IN8 IN9 12V GND T 5 GNDOUT1 OUT2 Loo 0 10 Vdc b Wiring to several circuits in parallel M3 12V K3 12V INT IN2 INS INA INS IN6 INT INS INS 12V GND T S GNDOUT OUT2 12V INT IN2 IN3 INA INS ING INT INS INO 12V GND T S GNDOUT OUT2 K2 gt 0 10V signal maximum impedance allowed 1500 O 4 1 3 CPs mode CPs on SUPPLY air The airflow delivered by the supply fans is automatically modulated to obtain a constant pressure aS measured by the pressure sensor in the duct The exhaust airflow is equals to EXT PUL of the supply airflow CPs on EXHAUST air The airflow delivered by the exhaust fans is automatically modulated to obtain a constant pressure as measured by the pres
50. rol mode indicates what controls the airflows 1 FATAL ERROR Fans are stopped 2 FIRE ALARM registers 40511 and 40512 3 RC remote control RC TAC4 4 EXTERNAL CONTACTS K1 K2 K3 contacts 5 TIMESCHEDULER configured by the RC TAC4 6 TIMESCHEDULER configured by MODBUS or by the GRC 7 MODBUS register 40201 8 BYPASS registers 40516 and 40517 9 BOOST registers 40548 and 40549 10 MODBUS registers 40204 and 40205 Antifreeze status of the external exchangers O OFF 1 antifreeze of the water exchanger BA or BA is activated 2 antifreeze of the cold water exchanger BA is activated 3 antifreeze of the warm and cold water exchangers BA and BA are activated Current Supply T heating setpoint in 0 1 C units Range 1 999 meaning 0 1 99 9 C 0 is supply heating OFF Current Supply T cooling setpoint in 0 1 C units Range 1 999 meaning 0 1 99 9 C 0 is supply cooling OFF Status of digital inputs on the TAC4 DG circuit Bitmap with 1 bit per input O OFF 1 ON closed with 12V Bit 0 K1 Bit 1 K2 as on off Bit 2 K3 as on off Bit 3 IN1 Bit 4 IN2 Bit 5 IN3 1254 m3 h 3 0 Pa 0 max of unit max of unit 295 6000 max of unit max of unit 1299 6000 max of unit max of unit 255 6000 max of unit max of unit 299 6000 999999 1 or 2 0 or 1 0 1 or 2 Oor 1 0
51. ructions in this operating manual The non observance of the safety instructions warning notices notes and instructions can lead to injuries or damages to the maxi e Unless otherwise stated in this operating manual only an authorised installer is entitled to install connect put into operation and maintain the maxi e The installation of the maxi is to be performed according to the general local building safety and installation instructions of the corresponding local authorities of the water works and electric works and other official regulations and directives e Always follow the safety instructions warning notices notes and instructions described in this operating manual e Please keep this manual during the complete life time of the maxi in proximity to the device e The instructions for the regular replacement of the filters or the cleaning of the supply and exhaust air valves are to be strictly followed e The specifications stated in this document may not be changed e Any modification of the maxi is prohibited e In order to guarantee that the device will be regularly controlled it is recommended to conclude 8 maintenance contract Your supplier can give you the addresses of authorised installers in your area 1 2 Used symbols The following symbols are used in this manual ce Caution special note A Risk of injury of the user or the installer damages to the device impairment of the operation of the device i
52. ss forced open ON OFF Postheat to desactivate the postheating 0 or 1 O Postheating allowed 1 Postheating not allowed 40226 R W R Fire alarm supply airflow 0 or 1 O Supply fan is stopped in fire alarm 1 Supply fan is running in fire alarm 40225 RAN A 40227 R W R Fire alarm exhaust airflow 0 or 1 O Exhaust fan is stopped in fire alarm 1 Exhaust fan is running in fire alarm 40228 R W R Boost control 0 or 1 O Boost function not activated 1 Boost function activated ON OFF Postcool to desactivate the cooling 0 or 1 O cooling allowed 1 cooling not allowed 40229 RAW A 33 40230 R W R Cooling or heating selection 0 or 1 0 heating position 17 cooling position 40251 R W E1 RESET TO FACTORY DEFAULT VALUES 0 or 1 Reset setup and advanced setup parameters to their factory default values This operation takes about 3 seconds The modbus write command will be answered immediately then the operation will be executed Modbus commands will not be answered during the operation Read always 0 Write 1 to perform reset 40253 RAN E1 Pressure alarm initialization 0 or 1 Start the initialization Will be accepted in CA and LS mode only Initialization is run with reference flow set in 40254 measure pressure store reference pressure Working mode is set to 9 during the initialization Read Ozidle 1 start Write 1 to start 40256 RAN E1 CPs mode initialization 0 or 1 Start the initialization Will be accepted
53. sure sensor in the duct The supply airflow is equals to 1 EXT PUL of the exhaust airflow 4 1 3 1 Wiring diagrams The pressure sensor is connected to entry K2 of the TAC4 DG circuit In the case of CPs on supply exhaust the pressure sensor on supply side is connected to K2 and on the exhaust side is connected to K3 a Wiring to 1 circuit BIBS BSS Sse K1 K2 K3 12V 12V IN1 IN2 IN3 IN4 INS IN6 IN7 INS IN9 12V GND T 5 GNDOUT1 OUT2 0 10 Vdc 0 10 Vdc b Wiring to several circuits in parallel 3 LIC L TS K2 12V 12V INT IN2 IN3 INA INS ING INT INS INS 12V GND GNDOUT OUT2 K3 12V 12V INT IN2 INS INA INS INS INT INS INS 12V GND T S GNDOUT OUT2 BEREIN MEN K2 gt 0 10V signal maximum impedance allowed 1500 Q 4 1 4 OFF mode It allows to stop the fans To restart the fans it is required to choose one of the other 3 working modes 4 2 BYPASS function freecooling The counterflow heat exchanger is fitted with a 100 bypass When the bypass is open fans may either continue to function in the same manner and setpoint as when the bypass is closed either operate at a fixed exhaust and supply airflow rate These airflow values can be re set via the SETUP ADVANCE Accord
54. t G4 class filter extract air maxi flat right model versions 9 Pre heating electrical antifreeze coil KWin option 10 Drain pan and drain maxi flat series drain pipe out 11 Air Air heat exchanger bypass 100 12 G4 filter on extract air G4 or F7 class filter fresh air maxi flat right model versions 13 Motorized damper at extract air inlet option 14 RC TAC4 gt All electrical connections made the installer are in 1 2 3 3 1 2 Schematic of the T sensors positioning in the maxi unit To allow easier identification of the temperature sensors 4 different wire colors are used Tf black wire 2 white wire T3 blue wire T4 amp T5 green wire not at maxi flat series 3 2 Control panel 3 label located inside the cover MOTOR CONTROL CABLES N ao oct uou u ral z SAT MODBUS SAT BAKW SAT MODBUS WP WP GND 27 OF Q0 Wt SAT BAKW KI A A GNO END fam DDO OTS Ny Connexion to the RC TAC4 cid 120136 BYPASS output to bypass actuator prewired CT output to CT actuator s option prewired KWout output for KWout power requlation option prewired KWin output for KWin power regulation option prewired 1 from outdoors T sensor prewired 52 from indoors T sensor prewired 53 to outdoors T sensor prewired S4 NV anti freeze portection T sensor option prewired S5 supply T sensor for NV
55. t 8 to 13 Type 10 Alarm indicating failure on T sensor T4 only with NV option It indicates that the T sensor T4 located on the coil and connected to the TAC4 DG circuit is defect open or short circuit or not connected This sensor is used to avoid frosting of the NV coil In this case as a safety measure the 3 way valve is opened and the contact used to start the circulator is closed After fixing the failure it is necessary to perform a RESET via the 40250 register or via the RESET button on the TAC4 DG circuit See 10 in table below 40300 register bit 14 15 Type 11 Alarm indicating failure on T sensor T5 only with NV option or KWout It indicates a failure of the T sensor T5 located in the supply duct and connected to the TAC4 DG circuit opened or short circuit or that it is not connected This sensor is used to regulate the post heating function After fixing the failure it is necessary to perform a RESET via the 40250 register or via the RESET button on the TAC4 DG circuit See 11 in table below 40301 register bit 0 1 Type 12 Alarm indicating that the assigned T cannot be reached only with NV option or KWout If the actual T is lower than the assigned T for more than 15 minutes with the post heating fully opened until See 12 in table below 40303 register bit 15 Type 13 and 14 Alarm indicating antifrosting alert only with KWin option In certain air T conditions as measured on the exhaust
56. ulation of 2 external heat exchangers electrical water hot and or cold TCP IP TAC4 MODULE Option MODBUS TCP IP communication please refer to TAC4 DG MODBUS TCP IP installation and user s manual for detailed information GPRS TAC4 MODULE Option GPRS Communication please refer to TAC4 DG GPRS installation and user s manual for detailed installation The SAT3 Option is a Circuit with 2 relays 2 SAT3 can be plugged please refer to SAT3 installation and user s manual for detailed information When plugged in position OR1 OR2 status of Fan On warning and of Pressure alarm warning and or When plugged in position OR3 OR4 status of NV option circulator and of bypass The MODBUS RTU Interface has the following functionalities Configuration of SETUP and ADVANCED SETUP Visualization of all the parameters Control operation of the unit airflows supply air temperatures etc 3 Generell maintenance instructions 3 1 Generell informations 3 1 1 Generell schematic of the maxi series Maxi flat series Maxi series 1 Main switch for power supply fans and control 2 Main switch for power supply to pre Kwin and or post Kwout heating coils options 3 Centralized wiring box of the 084 TAC4 DG circuit factory pre wired 4 Supply fan s 5 Exhaust fan s 6 Post heating water or electrical coil NV or KWout option 7 Motorized damper at fresh air inlet CT option 8 F7 class filter at fresh air inle
57. usual all modbus words are in big endian byte order Some registers act as bitmaps with 16 status bits some values are 32 bit They are transferred as two 16 bit registers first low word then high word When reading the master must combine two 16 bit words into one 32 bit value With shift Val32 long HIGH lt lt 16 LOW With math Val32 HIGH 65536 LOW For example Reg1 33041 Reg2 13 Val32 885009 When writing a 32 bit parameter the controller first buffers the low word Then when the high word is written the 32 bit parameter is updated This low word buffer is shared for all 32 bit parameters 5 5 Write cycles limitation The controller stores all setup parameters and some control parameters in non volatile EEPROM memory to protect against power failure This EEPROM memory has an endurance of 100 000 write cycles Therefore these parameters should not be changed too often Writing a parameter with the same value is not a change Changing a parameter once per hour would result in 8760 writes per year or 100 000 writes in 11 years Changing a setup parameter once per minute would result in 100 000 writes in only 69 days Those parameters are marked as E1 in the MODBUS map Some parameters are stored in a nonvolatile RAM memory Those parameters have no writing limitation and their value is not lost in case of power break Those parameters are marked as R in the MODBUS map 20 6 MODBUS map overview The TAC4 DG
58. ws as follows a If T 1 C and T lt floor T 1 50 for more than 5 minutes If CA and LS mode reduction of in and outgoing airflows to 66 of the assigned airflows If CPs Mode reduction to 75 of the assigned pressure This setup is maintained during 15 minutes after which the 100 airflow pressure assignment is reestablished Actions on RC if connected Actions on TAC4 DG circuit Action on fans Display text LED LEDPa LED Relay AL1 Relay R2 LED ALARM ALARM on SAT3 O R 1 AF T RED ON ON Assignment ALARM reduction REDUCED AIRFLOW b If T lt 5 C during 5 minutes the unit is stopped Actions on RC if connected Actions on TACA DG circuit Action on fans Display text LED LED Pa LED Relay AL1 Relay R2 LED ALARM ALARM on SAT3 O R 1 AFT RED Alarm Blink Stopped ALARM status STOP FANS Restart is made by resetting by pressing the RESET knob on TAC4 DG circuit or via the 40250 register 4 6 KWout post heating electrical coil control option The post heating coil is delivered factory mounted Its purpose is to keep a constant supply air temperature using the TAC4 DG regulation The assigned T is configured according to the 40425 register Features provided by the TAC4 DG regulation e Regulation of static relay of the electric coil in function of assigned supply T and actual measured supply T To avoid overheating regulation checks if fans are operating before

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