ThermoDual Domestic hot water charging system

Transcription

1 ThermoDual Domestic hot water charging system Description/Application ThermoDual is the compact and effective domestic hot water (DHW) charging system. Due to the consistent use of carefully selected components and highest quality materials, the compact the ThermoDual system meet all of the requirements for the prevention of legionella growth. The highly efficient heat transfer of the heat exchangers enable The ThermoDual system to attain low heating water return temperatures across the entire cycle of a tank charge, thus reducing the required media flows. This translates into greater operational efficiency and predestines this system for utilization in district heating networks and in combination with condensing boilers. The optimum adaptation to the applicable specific needs in terms of storage capacity and output ensures a maximum of efficiency, comfort and hygiene. Main system data Primary Secondary Type S H Max. operating temp. ( C) 100 (150) Max. operating pressure (bar) 16 (25) Working medium Circulation water/dhw 1 on request Approvals and Standards: W 553 of the DVGW 2 working temperature / circulation, W 551 of the DVGW 2 prevention of legionella growth, DIN4753 DHW storage tank. 2 German Technical and Scientific Association for Gas and Water ThermoDual S Compact DHW charging system with stainless steel domestic hot water storage tank and brazed plate heat exchanger as well as preinstalled piping assembly with all required fittings for installation. ThermoDual H Compact DHW charging system with stainless steel domestic hot water storage tank and gasketed plate heat exchanger as well as preinstalled piping assembly with all required fittings for installation. DHSMT/PL VD.KR.C2.02 Danfoss 12/2006 1

2 Ordering Explanation, ThermoDual types ThermoDual S 1506 Performance index NL 3 (no. of normal flats) 4 Volume storage tank (liter) Type S with brazed plate heat exchanger H with gasketed plate heat exchanger DHW charging system with preinstalled pipes assembly with all required fittings for installation 3 According to DIN 4708 only for German market 4 The normal flat for 35 persons (4 rooms) ThermoDual S (brazed plate heat exchanger) Type Code No VA 004B EM 5 004B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B Att. storage tank in enamelled steel ThermoDual H (gasketed plate heat exchanger) Type Code No B B B B B B B B B B B B B B B B B B B B B B B VD.KR.C2.02 Danfoss 12/2006 DHSMT/PL

3 Main components Main components in standard system: DHWapproved charging pumps, Storage tank, Heat exchanger, Shutoff valve 6, Balancing valve, Safety valve, Thermometer. 6 The selfacting control valve must be dimensioned according to local DH conditions and thus ordered separately without thermometer, 1 valve thermometers, 2 valves Special versions The ThermoDual system can be combined with a second or multiple DHW storage tanks for optimum tailoring to onsite conditions, available with readytomount piping, as an option. Variably configurable hot water charging system for special applications, on request: Stainless steel domestic hot water storage tank, series SE, capacity liters, Enamelled domestic hot water storage tank, series SEM, capacity liters, Brazed plate heat exchanger, Gasketed plate heat exchanger, Tube and shell heat exchanger, copper, series SHRCU, Tube and shell heat exchanger, stainless steel, series SHRVA, DHWadequate bronze or stainless steel charging pump, Balancing valve, Sensor pocket. Accessories 7 Red bronze or stainless steel sensor pockets, Selfacting control valves as twoway valve, 3way mixing valve, or 3way diverting valve, with thread or flange, Control and safety thermostats, storage tank thermometer, Additional storage tank with double piping. 7 Code no. for ordering on request Spare parts 8 Charging pumps UP 2030 N UPS 2560 B Z 25/6 UPS 2580 B Flow setting valves SD l/min DN 15 Rp ½ SD l/min DN 20 Rp ¾ SD l/min DN 20 Rp ¾ SD l/min DN 25 Rp 1 SD l/min DN 25 Rp 1 SD l/min DN 32 Rp 1¼ SD l/min DN 40 Rp 1½ SD l/min DN 50 Rp 2 Thermometer Tank thermometer, 0100 C, D 100 x 200 mm, inc. stainless steel pocket Miscellaneous accessories Thermostat TT C Sensor pocket for TT200 (in stainless steel) Thermostat AT 3090 C (surface type) 8 Other spare parts and accessories on request. Code No. 004B B B B B B B B B B B B B B B B6640 DHSMT/PL VD.KR.C2.02 Danfoss 12/2006 3

4 Technical data DHW DHW top delivery DHW permanent Heating Pressure Performance Connected temperatures performance delivery performance water loss Type index load prim./sec. 10 > 45 C 10 > 45 C 10 > 60 C flow HEX Input C NL 9 kw l/10 min l/h l/h l/h l/h kpa W ,5 70/ S / H / Performance index NL acc. to DIN 4708 in relation to a storage tank water temperature of 60 C. 10 Charging pump; A.C. 1 ~ 230 V / 50 Hz; thermal motor overload protection or motor protection by integrated thermal switch. 4 VD.KR.C2.02 Danfoss 12/2006 DHSMT/PL

5 Design and function Connections: 1 Domestic cold water (DCW) 2 Domestic hot water (DHW) 3 Circulation 4 District heating (DH) supply 5 District heating (DH) return The domestic hot water flow pumped through the heat exchanger by the charging pump remains constant at all times and is preset via the balancing valve. Components: 6 Thermometer 7 Charging pump 8 Heat exchanger 9 Balancing valve 12 Safety valve 20 Ball valve 36 Storage tank The domestic hot water temperature is maintained at a constant level through a balancing valve via the water temperature controller. As a result, the following operation modes can be defined for the ThermoDual DHW charging system: Low Load Operation During low load operation, all of the cold water flows through the heat exchanger. If the tap output is smaller than the flow preset by the balancing valve, a portion of the hot water (tap flow) flows to the tap locations in the upper part of the tank as a bypass. The residual water is removed from the bottom of the tank, causing the tank to be continually charged. The total tap output is covered by the heat exchanger, while the storage tank is not being discharged. Peak Load Operation During peak load operation (higher demand that can be supplied by the available heating power), the preset cold water flow flows through the heat exchanger and the residual water streams from the bottom to the top of the storage tank. The tap output is covered by the heat exchanger while the domestic water storage tank is being simultaneously discharged. Once tap operation ceases, the storage tank is charged as described below. DHSMT/PL VD.KR.C2.02 Danfoss 12/2006 5

6 Charging Operation (no consumption) If there is no consumption the storage tank is being charged. The total charging flow is removed through the bottom of the tank and returned through the top of the storage tank via heat exchanger. If the storage tank is completely charged and no output consumption occurs, the control valve closes and interrupts the heating water flow. A virtual flash showing the operations is available, please contact your Danfoss local representative. 6 VD.KR.C2.02 Danfoss 12/2006 DHSMT/PL

7 Sizing Dimensioning and selection of the ThermoDual system should be carried out with the support of the Danfoss dimensioning program. Dimensioning Diagram for Dwelling Houses acc. to DIN 4708 Example: Performance index:... NL 60 Selected: Storage tank capacity: liters Evaluated: Power consumption: kw Balancing valve: Charging pump:... UPS 2560 B or Star Z256 DHSMT/PL VD.KR.C2.02 Danfoss 12/2006 7

8 Mounting ThermoDual S After the storage tank has been set up, the heat exchanger is attached. The premounted fitting set, charging pump and corrugated hose can be easily installed due to mainly flat screwtop connections. The blowoff pipe of the safety valve is to be installed by the customer, based on local conditions and requirements. ThermoDual H Connect the storage tank and the heat exchanger with the premounted piping set, fitting sets and charging pump. The blowoff pipe of the safety valve is to be installed by the customer, based on local conditions and requirements. Dimensions ThermoDual S ThermoDual H 8 VD.KR.C2.02 Danfoss 12/2006 DHSMT/PL

9 S H Type H1 H2 H3 H4 D E approx. F approx. B approx. T approx. Connections 1, 2 3 4, 5 mm mm mm mm mm mm mm mm mm Rp Rp DN kg ¾ ¾ ½ ¾ Weight ¾ ½ Tare weight without water 12 Flange PN 16 acc. to DIN Welding tails 26,5 x 2,3 mm 14 Tolerance: 10 mm DHSMT/PL VD.KR.C2.02 Danfoss 12/2006 9

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