DTC 100/2
Contents
1. EMV800 F2A 250VAC DTC 100 2 Example of coupling with a pump In this case it is necessary to connect behind the pump a non return valve to avoid unwanted circulation of water DTC Differential thermostat DTC 100 2 T1 T2 Sensors T1 sensor located in the collector T2 sensor located in the DHWS P P circulation pump i Non return valve Electrical connection 3 220 240V L P EWV 50 Hz OFF N ON L N 1 2 31 4 5 6 78 9 10 11 12 13 14 15 16 T ls fgl P ii i s L eli N e nee a ee Perea DTC 100 2 Basic coupling with a pump controlled by the electri Il motor ball valve EMV 110 seri It is used in cases which require temperature regulation of sanitary water in the classical oil or solid fuel powered boiler When the conditions which require heating of the DHWS Domestic Hot Water Storage have been met the valve EMV 110 series 800 opens but the pump is put into operation only when the valve is open DTC Differential thermostat DTC 100 2 T1 T2 Sensors T1 sensor located in the collector T2 sensor located in the DHWS P P circulation pump w EMV Electric motor actuated ball valve EMV 110 series 800 EMV 110 series 801 MV 110 compact Electri2. disa i T item 1 2 VDR resistor thermo shrinkable OTA irection o tub the current Lo a 1 2 P N a immersion lengthening cable of the L J tube 1 2 cable S sensor figure A figure B Sensor T2 must be fixed to the provided location in the DHWS Domestic 4 Hot Water Storage or to the DHWS wall below the insulation as a surface 3 4 mounted sensor in the upper half of the exchanger If the sensor is installed a in the surface mounted way it is advisable to lubricate it beforehand with a T2 heat conducting grease or liquid metal io 2 2 12 L T2 T2 12 Installation of T2 into a specially Installation of T2 upon the boiler by Installation into a specially provided vertical or horizontal tube means of a clamp and a spring ribbon designed lateral tube protect the sensor against unwanted use glease for better conductivity of protect from unwanted extraction heat extraction DTC 100 2 ELECTRICAL CONNECTION The grounding cables P EMV 220 240 p areto be connected to N L L N iz the specially designed 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 terminals to the right of Lal Le ko ol L the coupling terminals T1 T2 P WR IE wu i L o i N eae Seen ne ae ae EEEE ETE EEEE ORAE sensor T1 sensor of the
3. DTC 100 2 Differential thermostat for solar system and combined multi source heating DTC 100 2 User manual Instructions for installation and maintenance CE K FIR T ROTOTEHNIKA s p CENTRALNI SERVIS Radegunda 54 3330 MOZIRJE Koro ka cesta 56a 3320 VELENJE PE VELENJE tel 03 898 35 30 Koro ka cesta 56a 3320 VELENJE 031 608 393 041 608 393 tel 03 898 35 00 fax 03 898 35 35 e mail servis first si e mail info first si http www first si ID 4870 04 DTC100 2 ang indd DTC 100 2 We congratulate you on your choice By purchasing the differential thermostat DTC you have selected a product that complies with all the most recent quality and safety standards It includes state of the art knowledge of how to harness solar energy and other alternative sources for water heating purposes in homes and offices We are convinced that you will find using our product highly cost efficient Thanks for your trust FIRST Rototehnika THE KIT INCLUDES 777777 1 Differential thermostat DTC 100 2 2 Sensor T1 with a silicon conductor for the collectors 3 Sensor T2 with a PVC conductor for the DHWS 4 Aclamp with two fastening springs to fasten the sensor 5 Instructions for use 6 Warranty card In case any of these are missing or damaged demand your seller to supply you with a replacement Read these instructions carefully as this will allow you to benefit from all the pos
4. cal connection z 220 240V P EMV nate 5 6 7 8 9 10 11 12 13 14 15 Hk fa H 1 2 3 4 Ll le 10 DTC 100 2 An outline of borehole positions to facilitate the installation f the differential therm n the wall gt o p i 70 DTC 100 2 Most frequently occuring failures No matter what the there is no mains voltage temperature is the the switch is in 0 position pump never operates short circuited DHWS sensor short circuited collector sensor No matter what the the switch in position 1 temperature is the disconnected collector sensor pump keeps operating short circuited DHWS sensor Temperature limits do the motor actuated ball valve not work remains open the closing flap stays open termal circulation of water is possible Despite the warmness the setting of T2 is too low of the collectors the the difference is set too high sanitary water is cool or not warm enough 12 check the mains voltage put the switch into AUTO position check the sensors put the switch into position AUTO check the sensors check the machine installation check the settings
5. een 10 and 90 C The system is supported either by a circulation pump or by an electrically actuated motor ball valve Manual control is provided to allow for operation checks if required or to be used in the case of a sensor breakdown The thermostat can be completely turned off DTC 100 2 INSTALLATION OF THE THERMOSTAT The thermostat is fastened upon the coat of the DHWS Domestic Hot Water Storage or to its immediate neighbourhood By simply using the outline of the boreholes drawn on page 11 of this booklet the thermostat can easily be fastened to the wall in the heating room Do not fasten the thermostat below tube joints or valves to avoid water dropping on its housing INSTALLATION OF THE SENSOR INTO THE COLLECTOR Sensor T1 is inserted as an immersion sensor into the immersion tube provided on the upper side of the collectors figure A The sensor is connected to clips 1 and 2 To lengthen the cable up to 50m you can use the 2x0 75 mm2 standard cable It is recommendable to allocate a VDR resistor Figure B to the point where the cable of the sensor and the lengthening cable join to prevent sudden jumps of voltage due to lightening strokes for example For greater lengths or in the areas where lightening strikes are more likely to happen it is advisable to use an armoured cable where the armoured coating is connected to the grounding terminals
6. f With the appliances using hot water additional protection against overheating is required which is to close the supply of water in case of thermostat failure ing the temperature differen he switching differen The temperature difference between the source of heating and the consumer the DHWS is set to the value required by the mechanical part of the installation by means of a screw drive and the potentiometer 3 on the cover of the thermostat When using collector heating this difference is between 5 and 10 K depending on the length of the tubes and the quality of their insulation If the tubes connecting the collectors with the boiler are insulated and their total length does not exceed 15 meters the difference can be 5 K whereas it needs to be increased in proportion to their length and poorer insulation DTC 100 2 Basic coupling with a pump controlled by an electric motor Il valve EMV 11 ri When the conditions required for the boiler to star heating are met the EMV 110 series 800 opens The pump however is put into operation only when the valve is open DTC Differential thermostat DTC 100 2 E T1 T2 Sensors T1 sensor located in the collector T2 sensor located in the DHWS P P circulation pump w EMV Electric motor actuated ball valve EMV 110 series 800 EMV 110 series 801 MV 110 compact Electrical connection uk fuk DH
7. he amount of temperature losses on the system These losses mainly depend on the length and the quality of the insulation of the tubes leading from the source to the DHWS OPERATION Single differential thermostat DTC 100 2 measures the temperature in the source collectors the stove and in the consumer DHWS In order to achieve heating effects the temperature of the heating body the heater in the boiler needs to exceed the temperature of the water in the consumer the boiler by at least 3 to 5 K This is why the minimum adjustable difference is 5 K factory setting When the temperature in the source exceeds the temperature of the water around the exchanger in the consumer the thermostat opens the valve EMV or actuates the pump and closes the valve or switches off the pump when the difference in temperature is lower than 3 to 4 K The thermostat de activates the pump also in the case when the achieved temperature of the water in the boiler equals the pre set temperature adjustable between 10 and 90 C The kit includes two sensors T1 and T2 of which one is installed into the heating source and the other into the upper half of the exchangers in individual boilers ADVANTAGES The adjustable temperature difference between the source and the consumer is within 5 and 15 K Potential output with a reversing contact SPDT 230V 50Hz The setting of the required temperature in the consumer DHWS is betw
8. perates only when the gliding switch 1 is in position AUTO 3 Potentiometer for the adjustment of the switching off temperature difference be tween the DHWS and the source of heating recommended setting is between 5 and 10K 4 LED to signal operation E OF THE MANUAL CONTROL SWITCH 0 No matter what the value of the temperature is the pump is off the valve remains closed EN AUTO 0 7 i AUTO Thermostat operates automatically normal operation 1 No matter what the value of the temperature is the valve remains open the pump keeps operating DTC 100 2 ing th mperature in the DHW By turning the right button 2 on the cover of the thermostat you can set the maximum temperature of the water in the DHWS Domestic Hot Water Storage between 10 and 90 C When the set temperature is achieved the thermostat closes the valve and turns off the pump This allows connection of appliances using hot water while operating such as the washing machine and the dish washing While using this option attention needs to be paid to the allowed input temperature of the water as prescribed by the manufacturer for each individual appliance WARNING If heating the water in a system including a heat pump it is necessary to consult the heat pump manufacturer concerning the appropriate coupling It is forbidden to switch on the thermostat where this provided that the temperature of the water is risen turns the compressor of
9. sibilities offered by this product NOTICE The examples of how to use the DTC 2 listed in this booklet are only schematic We accept no responsibility for incorrect hydraulic coupling of the mechanical part of the installations The mechanical installations must as well as the electrical ones comply with all the safety regulations prescribed by the law and the regulation books We reserve the right to modify the instructions and the technical data of the product without prior notice DTC 100 2 GENERAL INFORMATION DTC 2 is a single differential thermostat designed for heating water in homes and offices from one source solar collectors hot water boilers heat pumps etc The thermostat controls one pump or electrically actuated motor ball valve The thermostat allows setting two parameters that is 1 Setting the maximum temperature in the DHWS Domestic Hot Water Storage between 10 C and 90 C This temperature is determined by sensor T2 which is usually installed in the upper third of the exchanger 2 Setting the difference between the temperature in the boiler and the source of heating collectors It can be set between 5 and 15 K By means of this setting we define by how many degrees the temperature of the source of heating needs to exceed the temperature of the water around the exchanger in the DHWS in order to start the operation of the valve and put the pump into operation The setting of the difference depends on t
10. source collector KF silicon 2x0 25 mm 2 m long with two spring ribbons and one angle clamp orange phase L for closing the electrically actuated motor valve EMV 110 neutral connector N phase L of the pump i e opening of the electrically actuated motor valve EMV 110 find in our production line NOTICE The thermostat is designed to be fastened permanently While putting in the electrical installation it is necessary to insert an safety element to allow the thermostat at least a 3mm distance from the mains a switch or a power cord For any repairs inside the thermostat it must be fully disconnected from the mains TECHNICAL DATA Supply voltag nosmar neesi 230V 50Hz 10 Power consumption eseeeseeseeeeeseeeee eeens 4 VA Pump relay rating eeeeeseeeeeeeeeeeeeeees 3A 230VAC cos 0 6 Type of thermostat scoici P Max temp of water ccccceeeeseeseeeeeeee 100 C Interval of Operation ceeeeeeeeeeeeee 10 90 C Setting the difference eeeeeeeeee 5 15K Hysteresis of the thermostat 0 0 1 2K Ni OF SCNSOMS wiisceccs ficcies ociera 2 Nf OROUtPULS nen arsa e 1 230 VAC reversing SPDT lt _ DTC 100 2 DESCRIPTION OF THE FRONT PANEL ELEMENT DTC 100 2 LEGEND 1 The switch for manual control selection of a mode of operation 2 Button for adjustment of the temperature of the water in the DHWS o
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