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Viessmann 5443202

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SCU124

Please note:
The design and the specifications can be changed without prior notice.
The illustrations may differ from the original product.

Reprinting / copying
This mounting- and operation manual including all parts is
copyrighted.  Another  use  outside  the  copyright  requires
the  approval  of Viessmann  Manufacturing  Company  Inc..
This  especially  applies  for  copies,  translations,  microfilms
and the storage into electronic systems.
Editor: Viessmann Manufacturing Company Inc.

Important notice:
The texts and drawings in this manual are correct to the
best of our knowledge. As faults can never be excluded,
please note: Your own calculations and plans, under con sider-
ation of the current standards should only be basis for your
projects. We do not offer a guarantee for the completeness of
the drawings and texts of this manual - they only represent
some examples. They can only be used at your own risk.
No liability is assumed for incorrect, incomplete or false
information and / or any resulting damages.

Viessmann Manufacturing Company (U.S.) Inc.
45 Access Rd.
Warwick, RI 02886
Telephone: (401) 732-0667
Fax: (401) 732-0590
Internet: www.viessmann-us.com
E-Mail: [email protected]

Viessmann Manufacturing Company Inc.
750 McMurray Rd.
Waterloo, Ontario N2V 2G5
Telephone: (519) 885-6300
Fax: (519) 885-0887
Internet: www.viessmann.ca
E-Mail: [email protected]

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Содержание SCU124

Страница 1: ...ing Connection Application examples Operation Troubleshooting Thank you for buying this product Read this manual carefully to get the best perfomance from this unit Please keep this manual carefully 5443202 v1 0 02 2010 49011090 49011090 ...

Страница 2: ... danger described Note Notes are indicated with an information symbol Subject to technical change Errors excepted Please pay attention to the following safety advice in order to avoid danger and damage to people and property Instructions Attention should be paid to valid national and local standards and regulations respective valid standards and directives Equipment to be installed and used in acc...

Страница 3: ...ng plastic PC ABS and PMMA Protection type IP 20 EN 60529 Ambient temp 32 104 F 0 40 C Size 6 8 4 3 1 9 172 110 47 mm Mounting wall mounting mounting into patch panels is possible Display System screen for system visualization 16 segment display 7 seg ment display 8 symbols for system status and operating control lamp Operation by 3 push buttons at the front of the housing Functions Differential t...

Страница 4: ... and insert the lower wall plug Î Î Fasten the housing to the wall with lower fastening screw and tighten Î Î Complete wiring connections in accordance with termi nal allocations see chap 1 2 Electrical connection Î Î Place the cover back onto the housing Î Î Fasten the cover by means of the cross head screw 1 Installation 104 mm 4 1 130 mm 5 1 upper fastening lower fastening VBus 1 2 Electrical c...

Страница 5: ...ttached to the housing with the enclosed strain relief and the corresponding screws The controller is equipped with 2 semiconductor relays to which loads such as pumps valves etc can be con nected Relay 1 18 conductor R1 17 neutral conductor N 13 ground conductor Relay 2 16 conductor R2 15 neutral conductor N 14 ground conductor The power supply is to be carried out at the terminals 19 neutral con...

Страница 6: ...tion Terminal Page INIT x ODB initialization active 18 FLL x ODB filling time active 18 STAB x ODB stabilization in progress 18 COL x Temperature collector S1 18 TST x Temperature tank S2 18 S3 x Temperature sensor 3 S3 18 S4 x Temperature sensor 4 S4 18 TR x Temperature return sensor S4 18 n x Pump speed R1 R1 19 hP x Operating hours R1 R1 19 hP1 x Operating hours R1 if OBST is activated R1 19 hP...

Страница 7: ... Ra 20 0 K 22 DTCF x Cooling switch off temperature difference 30 0 Ra 15 0 K 22 OSTC x Option tank cooling OFF 23 OHOL x Option holiday cooling OFF 23 THOL x Holiday cooling temperature 110 F 40 C 23 OCN x Option minimum limitation OFF 23 CMN x Minimum collector temperature 50 F 10 C 23 OCF x Option antifreeze OFF 23 CFR x Antifreeze temperature 40 0 F 4 0 C 23 O TC x Option tube collector OFF 24...

Страница 8: ...perature tank 1 bottom S2 18 TSTT x Temperature tank 1 at the top S3 18 TDIS s Thermal disinfection temperature S3 18 S4 x Temperature sensor 4 S4 18 TR x Temperature return sensor S4 18 n1 x Pump speed R1 R1 19 h P1 x Operating hours R1 R1 19 h P2 x Operating hours R2 R2 19 kWh x Heat quantity kWh 19 MWh x Heat quantity MWh 19 CDIS s Countdown of monitoring period 19 SDIS s Starting time display ...

Страница 9: ...4 TCRU x OTC runtime 30 s 24 TCIN x OTC standstill interval 30 min 24 OHQM x Option energy metering OFF 24 FMAX x Maximum flow 6 0 l 24 MEDT x Antifreeze type 1 24 MED x Antifreeze concentration 45 24 AH O s Switch on temp for thermostat 1 110 F 40 C 10 AH F s Switch off temp for thermostat 1 120 F 45 C 10 t1 O s Switch on time 1 thermostat 00 00 10 t1 F s Switch off time 1 thermostat 00 00 10 t2 ...

Страница 10: ...C in steps of 1 0 Ra 0 5 K Factory setting 120 0 F 45 0 C t1 O t2 O t3 O Thermostat switch on time Adjustment range 00 00 23 45 Factory setting 00 00 t1 F t2 F t3 F Thermostat switch off time Adjustment range 00 00 23 45 Factory setting 00 00 In order to block the thermostat function for a certain period there are three time frames t1 t3 If the function should be active between 6 00 and 9 00 set t...

Страница 11: ... TDIS is continuously exceeded for the entire heating period DDIS S3 is used as the reference sensor and displayed as TSTT PDIS Monitoring period Adjustment range 0 30 0 24 h dd hh Factory setting 01 00 This function is used for protecting the upper tank zone against Legionella by activating the backup heating Reference sensor for the thermal disinfection is S3 Î Î To activate the function select ...

Страница 12: ... TR R1 S3 R2 Display Channels Channel Description Terminal Page COL x Temperature collector S1 18 TST x Temperature tank S2 18 S3 x Temperature sensor 3 S3 18 S4 x Temperature sensor 4 S4 18 TR x Temperature return sensor S4 18 n x Pump speed relay R1 18 h P1 x Operating hours R1 R1 19 h P2 x Operating hours R2 R2 19 kWh x Heat quantity kWh 19 MWh x Heat quantity MWh 19 TIME x Time 16 will be oper...

Страница 13: ...cy temperature collector 270 F 130 C 21 CMX s Maximum collector temperature 230 F 110 C 22 OCN x Option minimum limitation OFF 23 CMN x Minimum collector temperature 50 F 10 C 23 OCF x Option antifreeze OFF 23 CFR x Antifreeze temperature 40 0 F 4 0 C 23 O TC x Option tube collector OFF 24 TCST x OTC starting time 07 00 24 TCEN x OTC ending time 19 00 24 TCRU x OTC runtime 30 s 24 TCIN x OTC stand...

Страница 14: ...through the display channels by pressing buttons 1 and 2 Accessing the adjustment channels Î Î Scroll down in the display menu and press the forward button 1 for approx 2 seconds after you have reached the last display item When an adjustment value is shown on the display SET is indicated to the right of the channel name Î Î Press the Set button 3 in order to access the ad justment mode SET starts...

Страница 15: ...ensor fault sensor symbol is flashing quickly 2 3 Flashing codes LED flashing codes System screen flashing codes Pumps are flashing during initialization phase Sensor symbols are flashing if the corresponding sensor display channel is selected Sensors are flashing in the case of a sensor fault Burner symbol is flashing if the backup heating is active collector sensor collector solar pump backup he...

Страница 16: ...Î Save the adjustment by pressing button 3 again The symbol stops flashing Î Î Press button 1 or 2 to switch to the next or previous channel 1 2 3 SET The three pushbuttons of the BS 4 controller The commissioning menu consists of the following 6 channels 1 Language Î Î Adjust the desired menu language in this channel dE German En English LANG Language selection Selection dE En Factory setting En ...

Страница 17: ...s to suit the selected system layout The settings made in the commissioning menu can be changed later on in the corresponding adjustment channels Additional functions and options can of course be individu ally adjusted as well see chap 4 2 5 Maximum tank temperature Î Î Adjust the desired maximum tank temperature S MX Maximum tank temp Adjustment range 40 200 F 4 95 C Arr 3 40 190 F 4 90 C in step...

Страница 18: ... temperature sensor 4 S3 S4 Sensor temperatures Display range 40 500 F 40 260 C Indication of return temperature If energy metering is active the temperature at the sensor 4 is indicated as TR TR Return tempe rature Display range 40 500 F 40 260 C Note S3 and S4 will only be indicated if the temperature sensors are connected Initialization Indicates the time adjusted in tDTO running backwards INIT...

Страница 19: ...flow and S4 return are used for calculating the heat quantity sup plied It is shown in kWh in the channel kWh and in MWh in the channel MWh The overall heat quantity results from the sum of both values The accumulated heat quantity can be reset As soon as one of the display channels of the heat quantity is selected the symbol is permanently shown on the display Î Î Press button SET 3 for about 2 s...

Страница 20: ...ced to the minimum pump speed value factory setting 30 If the temperature difference reaches the adjusted nominal temperature difference the pump speed increases by one step 10 If the difference increases by the adjustable rise value the pump speed increases by 10 respectively until the maximum pump speed of 100 is reached The response of the controller can be adapted via the parameter Rise Note T...

Страница 21: ... limitation Emergency shutdown of the collector If the adjusted collector emergency shutdown temperature EM is exceeded the controller switches off the solar pump R1 in order to protect the system against overheating collector emergency shutdown A hysteresis of 20 Ra 10 K is set for the collector temperature limitation While the collector is in emergency shutdown flashing is shown on the display E...

Страница 22: ...tank temperature is higher than the maximum tank temperature S MX and the switch on temperature difference DTCO is reached the solar system remains activated Solar loading is continued until either the tank temperature reaches 200 F 95 C emergency shutdown of the tank the temperature difference falls below the ad justed value DTCF or the collector emergency shutdown temperature EM is reached If th...

Страница 23: ...r to protect the tank from frost damage CFR Antifreeze temperature Adjustment range 40 0 50 0 F 40 0 10 0 C in steps of 1 Ra 0 5 K Factory setting 40 0 F 4 0 C Tank cooling function When the tank cooling function is activated the controller aims to cool down the tank during the night in order to prepare it for solar loading on the following day If the adjusted maximum tank temperature S MX is exce...

Страница 24: ...elayed temperature measurement If the runtime TCRU is set to more than ten seconds the pump will be run at 100 for the first ten seconds of the runtime For the remaining runtime the pump will be run at the adjusted minimum speed nMN If the collector sensor is defective or the collector is blocked this function is suppressed or switched off Energy metering OHQM Energy metering Adjustment range OFF ...

Страница 25: ...the drainback option ODB is activated the pump will operate at 100 speed for the adjusted filling time tFLL in order to fill the system with fluid from the holding tank After tFLL pump speed will go down to the adjusted minimum pump speed nMn The switch off conditions will then be ignored for the stabilization time tSTB in order to avoid the system from shutting down prematurely If the function is...

Страница 26: ...ration Temperatures and temperature differences in F and Ra are displayed without units If the indication is set to C the units are displayed with the values UNIT Temperature unit selection Selection F C Factory setting C Note Always adjust the operating mode back to Auto when the control and service work is completed Normal operation is not possible in manual mode Reset By using the reset functio...

Страница 27: ... be checked with an ohmmeter In the following table the resistance values with the corresponding temperatures are shown Operating control lamp off Check the power supply Is it disconnected no The fuse of the controller could be blown It can be replaced after the front cover has been removed spare fuse is enclosed in the accessory bag yes Check the supply line and reconnect it C F Ω C F Ω 10 14 961...

Страница 28: ...ocked yes no Clean it Heat exchanger too small yes Replace with correctly sized one no Plausibility control of the option tube collec tor special function Change Ton and Toff correspondingly Switch on temperature difference Ton to large no yes Non ideal position of the coll ector sensor e g flatscrew sensor instead of sensor in sensor wells no Pump is overheated but no heat transfer from the colle...

Страница 29: ...mp start up in manual operation yes There is no current check fuses replace them and check power supply The adjusted temperature difference for starting the pump is to high choose a value which makes more sense no Is the pump current enabled by the control ler yes Is the pump stuck Turn the pump shaft using a screwdriver now pas sable Pump is defective re place it Are the controller fuses o k Cont...

Страница 30: ...ing and balance values of the solar system over a long period of time The DL2 can be configured and read out with a standard internet browser via its integrated web interface For transmission of the data stored in the internal memory of the DL2 to a PC an SD card can be used The DL2 is appropriate for all controllers with VBus It can be connected directly to a PC or router for remote access and th...

Страница 31: ... Viessmann 5443202 31 SCU124 Notes ...

Страница 32: ... our knowledge As faults can never be excluded please note Your own calculations and plans under con sider ation of the current standards should only be basis for your projects We do not offer a guarantee for the completeness of the drawings and texts of this manual they only represent some examples They can only be used at your own risk No liability is assumed for incorrect incomplete or false in...

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