DTC 100/3
Contents
1. Install T2 and T4 sensor to provided place in hot water tank or on hot F WE o Ea q water tank wall under isolation as contact sensor in upper part of ex t4 2 changer When sensor is mounted as contact one we recommend to 7 coat it with heat conducting paste or liquid metal 1 2s5l6 CS l m xU m T2 T2 T2 T2 T4 T4 T4 T4 In special purpose vertical or On hot water tank with clip wire and In special purpose side horizontal tube sensor should be spring strip use paste for better heat tube protect against protected against accidental transmission extraction extraction CONTROL PANEL amp DTC 100 3 1 Operation switch for operating mode selector 2 Regulation of maximum required temperature in water storage tanks 3 Settings the difference NP 4 LED indicator of working circulation pump DTC 100 3 USE OF SELECTOR SWITCH FOR MANUAL CONTROL With selector switch 2 you select one of the following models of operation ON Continuously heating of primary water tank secondary is ON ONSE ATO OFF out of function There is no limit of water tank temperature ON2 Continuously heating of secondary water tank primary is WN out of function There is no limit of water tank temperature OFF Irrespective of temperature values the pump is off AUTO Automatic operation of thermostat normal op2. V2 EMV800 V RM24 EMV 2 3 4 7 12 Ls O j amp 9 v Zh uw Oh SP S T4 T2 T bc ca P Ist S 1 2 3 4 5 6 7 8 9 10 1112 13 14 15 16 ro L I B N i oO DTC 100 3 Connection with two pumps To prevent the termosyphonic circulation is built in nonreturn valve in each circuit Instead of use the nonreturn valves is recommended use 2 way electric motor ball valves In the connection with two pumps the factory installed bridge on the right side of termi nals must be moved in lover position as it is shown on the picture TI Electrical connection S 14 72 T P2 PI S B A v m amp e PL AE SF jo 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 rs l me L N I G UG WARNING The bridge is under supply voltage so thermostat must be disconnected from supply voltage when you move it 10 DTC 100 3 Water tank with two exchangers connection with one circulation pump controlled by 2 way electric motor ball valve and 3 way electric motor ball valve The connection enables fast warming of upper part of water tank When is warm enough than thermostat heats a whole water tank This connection is very efficient in heating systems with solar collectors Even by weak intensity of sun at mornings cloudy weather enough heats the smaller quantity of
3. the pool with solar collectors Priority has the domestic hot water tank When the temperature in DHWT is reached the surplus of energy of solar collectors in the summer is directed for heating the swimming pool Electrical connection EMV800 T4 T2 Ti i I 2 al4ls e 7 e 9 hohihehahalishe L Instead of ball valve can be connected only the pump and nonreturn valve Pump is connected directly on terminals 12 and 13 13 DTC 100 3 Heating the domestic hot water tank DHWT and water in the pool with solar collectors two pumps connection Priority has the domestic hot water tank When the temperature in DHWT is reached the surplus of energy of solar collectors in the summer is directed for heating the swimming pool In the connection with two pumps the factory installed bridge on the right side of terminals must be moved in lover position as it is shown on the picture TI S 14 72 T P2 PI S B Z v m amp e PL ILL LIE B fo 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 ris L 1 N I G niu o ed E WARNING The bridge is under supply voltage so thermostat must be disconn
4. to position for heating secondary storage tank N neutral L phase changeover 3 way electric motor ball valve to position for heating primary domestic hot water storage tank L phase circulation pump or phase for opening 2 way electric motor ball valve N neutral L phase for closing 2 way electric motor ball valve L phase connection for mains 280VAC 50Hz N neutral connection for mains 230VAC 50Hz WARNING The thermostat is designed for fixed instalation When performing electric instalation an element should be inserted which enables at least 3 mm separation of thermostat from the mains switch or Socket Prir to each intervention in the thermostat first disconnect it from the mains DTC 100 3 SENSOR INSTALLATION IN COLLECTOR Install T1 as immersion sensor in collecting pipe at the top of the collectors in provided Sleeve Connect the sensor on terminals 7 and 8 For extension the sensor s cable to 50m use cable 2x0 75mm for longer cables use cable 2x1 5mm7 On the spot where is connection with sensor s cable and extension cable is recommended to use VDR resistor T piece 1 2 VDR resistor thermo shrinkable Lc flow tubes i direction ww A ue 4 Pipe 1 2 extension sensor conductor _ __ J conductor c SENSORS INSTALLATION IN HOT WATER TANK
5. Differential thermostat for solar systems and combined heating sources DTC 100 3 User s manual Installation and maintenance instructions FIRST ROTOTEHNIKA s p tel 386 3 898 35 00 Radegunda 54 SI 3330 MOZIRJE fax 386 3 898 35 35 SLOVENIJA e mail info rototehnika sp si PM7 0141 01DTC100 3ang DTC 100 3 HOLES FOR EASIER INSTALLATION OF DIFFERENTIAL THERMOSTAT ON WALL 70 DTC 100 3 DEAR CUSTUMER Congratulations you have bought a DTC 100 3 differential thermostat manufactured according to the latest quality and safety standards It is made according to the state of art and efficiently utilises solar energy or alternative sources for domestic water heating We are convinced that the use of our product will satisfy your needs too and help you to save your money Thanks for your confidence FIRST Rototehnika THE SET CONSIST OF Diferential thermostat DTC 100 3 T1 collector sensor with silicone conductor T2 and T3 hot water tank sensor with PVC conductor Clip for sensor fastening with fixing springs Instruction for use Warranty certificate In case any of above specified elements are missing or are defective require your dealer to replace it Read the instructions carefuly in order to be able to make use of all advantages of the product WARNING All examples listed in the instructions are merely indicativ The ma
6. ected from supply voltage when you move it DTC 100 3 TECHNICAL DATA Supply voltage 230V 50Hz 10 Power consumption 4VA Pump relay rating 3A 230VAC cos p 0 6 Type of thermostat P Adjustable temperature range 10 C 90 C Temperature difference setting 5 C 15 C Hysteresis of difference 2 K Hysteresis of the thermostat 1 2 K Nr of Sensors siisii 3 Nr Of outputs sese hee 2 230 VAC Trouble shooting guide TROUBLE POSSIBLE FAULIRE REMEDY Plug not connected Check main power The selector switch is in Set the selector switch in Irrespective of the 0 position position AUTO temperatures all circuits are inactive Sensors T2 and T4 are interupted Check sensors Sensor T1 is short circuit Irrespective of the The selector switch is in Set the selector switch in temperature the primary position ON1 position AUTO water tank is continuously heated Sensor T2 is short circuit Check sensor Irrespective of the temperature the secondary The selector switch is in Set the selector switch in water tank is continuously position ON2 position AUTO heated The water tank In spite of enough temperature is not set high temperature in collectors enough the water is not warm enough Check se
7. eration WARNING OFF does not enable galvanic separation from mains When replacing the pump disconnect supply voltage Temperature setting of storage tank You can set maximum water temperature of both storage tanks from 10 to 90 When the temperature is reached in the primary storage tank the thermostat changeover 3 way electric motor ball valve to heating the secondary storage tank When the tempera ture is reached in the secondary storage tank deactivate the pump regardless the tem perature of heating source If the appliance with limited maximum temperature of inflow uses hot water this setting is very useful WARNING In the systems with heating pump is recommended to consult with manufacturer It s forbidden to directly control the compressor of heating pump with the thermostat It is recommended that you built in system protection for over heating the storage tank in case of error Differential thermostat DTC 100 3 can be used like a single differential thermostat one storage tank but without connection of sensor T4 If you later built in second storage tank than you built in 3 way motor ball valve and connect the sensor T4 Difference setting The difference is set with the knob depending of heat losses of the system which depend on lengths of pipelines from source to storage tank and on pipeline insulation It can be set from 5 to 10 C If the pipes of installation are good insulate and they are not
8. he system which depend on lenghts of pipelines from source to hot water tank and on pipeline insulation OPERATION Double differential thermostat DTC 100 3 measures the temperature in the heating Source solar collector heating boiler and the temperature in two storage tanks boiler swimming pool One of the storage tanks has precedence over other in practice means usually the smaller boiler in the smaller boiler is need for domestic hot water When the boiler s temperature is reached then thermostat changeover the 3 way ball valve or diverter valve for heating second larger storage tank If the temperature from heating source solar collector is not high enough according the set temperature for primary storage tank but is higher then the temperature from second storage tank then thermostat changeover the 3 way ball valve or diverter valve for heat ing second larger storage tank When the both temperatures are reached to maximum temperature the pump is switched off Heating effect is provided when heating source temperature is higher than the tempera ture of the user water in hot water tank Consequently minimum adjustable difference is 5 factory set When the difference is smaller then the set difference thermostat Switches off the pump In the set are three sensors One is installed in the heating source solar collector and another two in two storage tanks in upper part of exchanger DTC 100 3 Se
9. longer than 15m the difference should be 5 With the pipes length or weaker insulation the difference must be higher DTC 100 3 Basic connection with one circulation pump controlled by 2 way electric motor ball valve and 3 way electric motor ball valve When is fulfil a condition for heating water tank thermostat opens the 2 way ball valve and when the valve is open it switch on the pump Instead of ball valve can be connected only the pump and nonreturn valve Pump is connected directly on terminals TI EMV710 T4 Electrical connection EMV800 1 2 3 4 5 6 7 8 9 10 11 12 ee Instead of ball valve can be connected only the pump and nonreturn valve Pump is connected directly on terminals 12 and 13 DTC 100 3 Connection with circulation pump with nonreturn valve and two 2 way electric motor ball valve This connection is recommended when you use differential thermostat as single differ ential thermostat Later is easier to add second water tank Electrical connection
10. nsors T1 and T2 are used for primary heating circuit which heats water in smaller storage tank domestic hot water storage tank Sensors T1 and T4 are used for secondary heating circuit which heats water in larger boiler or swimming pool etc Sensor T1 is heating source sensor usually solar collec tor sensors T2 and T4 are storage tank sensors Differential thermostat DTC 100 3 can be used like a single differential thermostat but without connection of sensor T4 INSTALATION OF THERMOSTAT Install the thermostat on hot water tank chasing or close to it Do not install it under the pipe fittings or valves due to possible water dripping on its housing ELECTRICAL CONNECTION terminals for use with two pumps connection bridge factory default bridge for use with two pumps connection BSF1 BSF1 KF T4 72 T xU n S EA Grounding wires Be S should be connected to 112 3 4 5 os N o o N wo T a o I mS special screw terminals situated on right side of DEREN acd een eR APOIO TEE terminal strips TERMINAL CONNECTION Sensor T4 secondary water storage tank grey r oe 230V 50Hz Sensor T2 primary domestic hot water tank grey Sensor T1 heating source solar collector red silicon L phase changeover 3 way electric motor ball valve
11. nufacturer accepts no responsebility for incorrect hydraulic connection of machine part of installations should comply with all safety regulations defined by law and the rules We reserve the right to modify the instructions and the technical data of the product without prior notice DTC 100 3 GENERAL DTC 100 3 is a double differential thermostat designed for domestic water heating with two storage tanks from one heating source solar collectors boilers heating pumps It is used in the systems where during the day one storage tank cannot accumulate whole energy which is disposal from solar collectors The thermostat controls circulation pump and motorised diverter valve ROTODIVERT or 3 way motorised ball valve EMV 710 830 930 With special el connection it can control two pumps or 2 way motorised ball valve The thermostat enables setting of two parameters i e 1 Regulation of maximum temperature in hot water storage tank from 10 to 90 C This temperature is defined by T2 and T4 sensor witch is generally mounted in upper third of heat exchanger in water storage tank 2 Regulation of difference for higher exchanger from 2 to 15 C With this parameter you define how much the value of the source temperature collector boiler should exceed the temperature of water around the exchanger in storage tank that the regulator activates the pump The difference is set in relation to the volume of heat losses of t
12. ttings The difference is set too high 15 DTC 100 3 Advantages of motor actuated ball valves of EMV110 series with incorporated relay module for solar heating systems In solar heating systems motor actuated ball valves can prevent various inconveniences Effectively prevent hydraulic shocks in systems as they require 30 seconds for com plete opening Due to their shape they do not impede the flow Springs are not included therefore noise does not appear When closed 10096 sealing is guaranteed They have an output for pump up to 1000 W in open position therefore they do not present a hydraulic load for pump in closed position They enable pump switching on only in completely open position Due to installed RELAY module they enable control with make contact only If during closing or opening process impurities enter in valve which could block it the valve stops and immediately afterwards continues with opening or closing process in opposite direction so that water flow can rinse the impurities up to cleaning net anti blocking system EMV 110 800 Built in relay module RM 24 48 16
13. water TI EMV710 3 Se ee EMV800 v M Electrical connection T4 T2 Ti i I 2 al4ls e 7 e 9 hohihehahalishe ooo Instead of ball valve can be connected only the pump and nonreturn valve Pump is connected directly on terminals 12 and 13 11 DTC 100 3 Water tank with two exchangers connection with two pumps The connection enables fast warming of upper part of water tank When is warm enough than thermostat heats a whole water tank This connection is very efficient in heating systems with solar collectors Even by weak intensity of sun at mornings cloudy weather enough heats the smaller quantity of water In the connection with two pumps the factory installed bridge on the right side of termi nals must be moved in lover position as it is shown on the picture TI Electrical connection G d B d tem Ce LL FILET PIE Is fo 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 rio L I a N 4 E o ie ed E WARNING The bridge is under supply voltage so thermostat must be disconnected from supply voltage when you move it 12 DTC 100 3 Heating the domestic hot water tank DHWT and water in
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