Data sheet ECC 12 and 22

Transcription

1 Application ECC is an electronic room temperature controller for water-based systems. ECC can control - fan-coil units - inductions units - air conditioning systems - small ventilating systems - 2-pipe systems with central heating or cooling change-over - 4-pipe systems for sequential heating or cooling The electronic PI-controller with double loop can control supply air temperature providing required room temperature. The double loop function will eliminate tolerances in terminal units. ECC must be connected to ECC-S supply air temperature sensor and ABNC thermohydraulic motor. Then room control panel ECC-R is connected. However, ECC controller can be used without ECC-R room control panel, please consult Danfoss. ABNC thermohydraulic motor can be combined with KOVM 3-way valves and with RAV, VMT and RA-N 2-way valves. Direct acting valves can be used for both heating and cooling applications. ECC has potentiometer for required room temperature setting. Use room control panel ECC-R for further room temperature (set point) displacement from 0 to ±5K or from 0 to ±2.5K. ECC heating controller can also be used for temperature reduction at night and weekends. BC-HSC VD.79.A2.02 Danfoss 12/93 1

2 Application (ECC 12) ECC 12 can be used as heating or cooling controller. The controller has two outputs with one supply air temperature sensor each to ensure equal room supply air temperature from all units. ECC 12 has a red indicator lamp for heating or cooling demand indication. Application (ECC 22) ECC 22 is a sequential controller with adjustable neutral zone. Factory setting 2K. ECC 22 is used for 4-pipe systems with sequential heating and cooling. ECC 22 has a green indicator lamp for cooling indication and a red lamp for heating indication. The controller has two sets of sequential heating and cooling outputs. Each set has one supply air sensor to ensure equal room supply air temperature from all units. 2 VD.79.A2.02 Danfoss 12/93 BC-HSC

3 Ordering Controller Type Description Temperature range Neutralzone Code no. ECC 12 Heating or cooling controller for 2-pipe systems C No 087B0061 ECC 22 Sequential controller for 4-pipe systems Adjustable C with sequential heating and cooling K 087B0062 Room control panel Type Description Temperature Set point range displacement Code no. ECC-R Room control panel for continous set point displacement C ± 5 K 087N0050 ECC-R Room control panel for continous set point displacement C ± 2.5 K 087N0051 Room temperature sensor ECC-R Tamper proof version without 087N0052 room temperature displacement Accessories for ECC-R Description Adapter plate for CEV, CEK and CED replacement Code no. 087N0099 Thermohydraulic motor Type Valve Function Code no. KOVM, RAV and VMT normally 082F1046 ABNC RA 2000 closed 082F1045 ABNC motor and RA 2000 valve combination requires adapters and extension pieces supplied in boxes of 10 each. A cap for motor protection against theft or damage is available. The cap is fixed with an internal hexagon screw. ABNC accessories Code no. Valve Adapter Protection and extension cap RA F F1211 RAV/VMT - 082F1211 Sensor Type Description Code no. ECC-S Supply air temperature sensor, NTC W at 25 C, cable 1500 mm 087N0055 Three-way mixing valves type KOVM Type Connection Max. pressure Max. ISO 7/1 with without 1) Test supply k vs static Dp bypass bypass c pressure temp. inlet outlet m 3 /h bar bar bar bar bar C Code no U3014 KOVM R p 1/2 R p 1/ U U3020 1) Dp c represents pressure fall across valvecontrolled heat exchanger. Accesories for KOVM valve Cu-pipe-fittings Type Æ 12 compression fittings Code no. 013L0288 Æ 15 compression fittings 013L0289 Code no. for 1-off. Supplied in boxes of 10. BC-HSC VD.79.A2.02 Danfoss 12/93 3

4 Two-way valves, straight version, types RAV and VMT Connection Max. pressure Max. Test supply Type inlet outlet k vs operating Dp Code no. pressure temp. m 3 /h bar bar ISO 7/1 bar C RAV 10/8 R p 3/8 R 3/ U0012 RAV 15/8 R p 1/2 R 1/ U RAV 20/8 R p 3/4 R 3/ U0022 RAV 25/8 R p 1 R U0027 ISO 228/1 VMT 15/8 G 3/4 A G 3/4 A F0115 VMT 20/8 G 1 A G 1 A F0120 VMT 25/8 G 1 1/4A G 1 1/4A F0125 Accessories Type Cu-pipe fittings Code no. 1) Æ 15 x 1 013U0130 VMT 15 Æ 16 x 1 013U0131 Æ 18 x 1 013U0132 VMT 20 Æ 18 x 1 013U0134 Æ 22 x 1 013U0135 VMT 25 Æ 28 x 1 013U0140 Accessories Spare parts Type Code no. 1) Gland seal (for all valves except RA 2000) 013U0070 Materials in contact with water: Valve body: MS 58, nickel-plated W-no Valve cone: NBR rubber Pressure pin: CrMo steel, W no O-ring: EPDM rubber Type Plastic pipe fittings Code no. 1) Æ 16 x 2 VMT 15 Æ 18 x 2 1) Supplied in boxes of G G3108 Two-way valves type RA-N and RA-FN Please see data sheet on RA valves. Transformer sizing Use an approved transformer with galvanic separation. Never use autotransformer. Transformer data: Primary voltage 230 V~ Hz Secondary voltage 24 V ~ ±15% Calculate transformer size on the basis of formula: P = 8 x n [VA] n = maximum number of ABNC motors connected. Transformer mounting is to follow regulations. ECC 12 - Calculating maximum number of ABNC motors connected (n) Add number of connected ABNC motors. ECC 22 - Calculating n when heating and cooling outputs have the same number of ABNC motors Add number of connected ABNC motors and divide the number by two (i.e. n = half the number of motors connected) ECC 22 - Calculating n when heating and cooling outputs have different number of ABNC motors Add number of connected ABNC motors in heating and in cooling output and use the highest number of motors (i.e. n = the highest number of motors connected to either heating or cooling outputs. Example Given: 4 ECC 22 connected to 14 ABNC motors (6 motors to heating and 8 motors to cooling). P = 8 x 8 = 64 [VA] 4 VD.79.A2.02 Danfoss 12/93 BC-HSC

5 Sizing System description We recommend max. flow temperature not exceeding 65 C. To ensure hydraulic balance in the heating system max. differential pressure (Dp) across valves must not exceed 0.3 bar. For optimal control we recommend heating systems with pre-set valves and weather compensation control. High differential pressure should be avoided if the risk of noise is to be eliminated. Differential pressures can be reduced using Danfoss AVDL, ASVP, AVP, AVPB, AVPQ or IVD pressure controls. BC-HSC VD.79.A2.02 Danfoss 12/93 5

6 Two pipe heating systems ECC 12 Variable volume control, heating On room temperature fall ECC 12 controller and ABNC thermohydraulic motor will open control valve modulatingly to allow increased hot water flow through the heating coil. temperature rise. Large systems will require flow and differential pressure control. Consult Danfoss for further information. Constant volume control, heating On room temperature fall ECC 12 controller and ABNC thermohydraulic motor will open KOVM valve, port (B) to allow increased hot water flow through the heating coil. Reverse function will occur at room temperature rise. As KOVM valve opens to allow increased hot water flow through the heating coil (B-AB) the built-in bypass (A-AB) closes. temperature rise. KOVM valve is fitted so that the bypass facility ensures constant circulating water flow, i.e. constant pump pressure. 6 VD.79.A2.02 Danfoss 12/93 BC-HSC

7 Two-pipe cooling systems ECC 12 in cooling mode (ECC-R terminals 6 and 7 are connected) Variable volume control, cooling On room temperature rise ECC 12 controller and ABNC thermohydraulic motor will open control valve modulatingly to allow increased cooling water flow through the cooling coil. temperature fall. Large systems will require flow and differential pressure control. Consult Danfoss for further information. Constant volume control, cooling On room temperature rise ECC 12 controller and ABNC thermohydraulic motor will open KOVM valve, port (B) modulatingly to allow increased cooling water flow through the cooling coil. Reverse function will occur at room temperature fall. As KOVM valve opens to allow increased cold water flow through the cooling coil (B- AB) the built-in bypass (A-AB) closes. temperature fall. KOVM valve is fitted so that the bypass facility ensures constant circulating water flow, i.e. constant pump pressure. BC-HSC VD.79.A2.02 Danfoss 12/93 7

8 Two pipe change-over systems ECC 12 Operation principle Change-over cooling/heating system supplies hot or cold water. The terminal unit controls consists of ECC 12 controller, ECC-R room control panel, ECC-S supply air temperature sensor and ABNC thermohydraulic motor. ECC 12 controller also requires a manual or an automatic switch function to distinguish cold water from hot water supply. At cold water supply ECC-R room control panel terminals 6 and 7 are short-circuited by a SPDT-switch. At hot water supply ECC-R room control panel terminals 6 and 7 must not be connected. A surface thermostat mounted onto the supply pipes will indicate cold or hot water supply from the central system. Always mount surface thermostat onto supply pipes where circulation is constant to provide for correct control irrespective of coil load variations. Consider actual flow temperatures when selecting surface thermostat type, e.g. an adjustable surface thermostat with lock-up setting knob. The surface thermostat switch must fit safety voltage 5V/150 ma. Take care that room control panels have one change-over switch each. Variable volume control Heating On room temperature fall ECC 12 controller and ABNC thermohydraulic motor will open the valve modulatingly to allow hot water flow through the. Cooling On room temperature rise ECC 12 controller and ABNC thermohydraulic motor will open the valve modulatingly to allow cold water flow through the coil. temperature fall. Large systems will require flow and differential pressure control. Consult Danfoss for further information. Constant volume control Heating On room temperature fall ECC 12 controller and ABNC thermohydraulic motor will open the KOVM valve modulatingly to allow hot water flow through the coil passing valve ports B-AB and at the same time water flow through the built-in bypass A-AB will be reduced. temperature rise. Cooling On room temperature rise ECC 12 controller and ABNC thermohydraulic motor will open the KOVM valve modulatingly to allow cold water flow through the coil passing valve ports B-AB and at the same time water flow through the built-in bypass A-AB will be reduced. temperature fall. KOVM valve is fitted so that the bypass facility ensures constant circulating water flow, i.e. constant pump pressure. temperature rise. 8 VD.79.A2.02 Danfoss 12/93 BC-HSC

9 Four pipe two-heatexchanger systems ECC 22 Variable volume control On room temperature rise ECC 22 controller and ABNC thermohydraulic motor will close the heating valve modulatingly to reduce water flow through the heating coil. When room temperature continues to rise, the valve closes completely. The adjustable builtin neutral zone ensures that the valve remains closed until room temperature has increased by the degrees set on the controller-front potentiometer. Any increase in excess of that allows the cooling valve to open modulatingly to increase cold water flow through the cooling coil. temperature fall. Large systems will require flow and differential pressure control. Consult Danfoss for further information. Constant volume control On room temperature rise ECC 22 controller and ABNC thermohydraulic motor will close heating valve, ports B-AB, modulatingly to reduce water flow through the heating coil and at the same time increase water flow through the built-in bypass (A-AB). When room temperature continues to increase the valve closes completely. The adjustable built-in neutral zone ensures that the valve remains closed, until room temperature has increased by the degrees set on the controller-front potentiometer. Any increasse in excess of that allows the cooling valve, ports B-AB, to open modulatingly to conduct water flow through the cooling coil. At the same time water flow through the builtin bypass A-AB will be reduced. temperature fall. KOVM valve is fitted so that the bypass facility ensures constant circulating water flow, i.e. constant pump pressure. BC-HSC VD.79.A2.02 Danfoss 12/93 9

10 Data General data on ECC 12 and ECC 22 Supply voltage 24 V, Hz Power consumption 1.4 W Voltage range 24 V, ± 15 % Ambient operation temperature -10 to 50 C Enclosure DIN-rail mounting Enclosure tightness IP 20 Sensor type NTC W at 25 C Storage temperature C Output load Max. 1 ABNC per output Control principle Double loop with P and PI ECC 12 Number of outputs ECC 22 Neutral zone Heating outputs Cooling outputs 2 heating or 2 cooling circuits K 2 heating circuits 2 cooling circuits ABNC Supply voltage 24 V~, ± 15 % Frequency Hz Start-up power consumption 270 ma Operation power consumption 70 ma Ambient temperature 0-50 C Enclosure IP 40 Cable length 1200 mm 10 VD.79.A2.02 Danfoss 12/93 BC-HSC

11 Wiring ECC 12 Note: On installation take an 8-wire cable between ECC-R room control panel and ECC controller to prepare for night-temperature - reduction and/or change-over function. For night-temperature-reduction or changeover function the used switch must fit safety voltage 5V/150 ma. Take care that room control panels have one switch each both for night temperature reduction and changeover function. ECC 22 BC-HSC VD.79.A2.02 Danfoss 12/93 11

12 Mounting and wiring ABNC Dimensions ECC Dimensions ABN - protective cap 12 VD.79.A2.02 Danfoss 12/93 BC-HSC

13 Dimensions ECC-R Dimensions Adapter for ECC-R BC-HSC VD.79.A2.02 Danfoss 12/93 13

14 Dimensions ABNC-RA2000 DN D d 2 H L Type ISO 7/1 mm mm 10 R p 3/8 R 3/ RA-N, RA-FN 15 R p 1/2 R 1/ RA-U 20 R p 3/4 R 3/ R p 1 R 1 RA-N, RA-FN R p 1/2 R 1/ R p 3/4 R 3/4 RA-G R p 1 R ABNC-RAV DN D d 2 H L RAV ISO 7/1 mm m mm 15 R p 1/2 R 1/2 15/ R p 3/4 R 3/4 20/ R p 1 R 1 25/ ABNC-VMT DN a b H L VMT ISO 228/1 mm mm 15 Æ15, Æ16, Æ18 G 3/4 A 15/ Æ18, Æ22 G 1 A 20/ Æ28 G 1 1/4 A 25/ ABNC-KOVM DN D H KOVM ISO 7/1 mm R p 1/ VD.79.A2.02 Danfoss 12/93 BC-HSC

15 Design Valve bodies Valve bodies are made of brass, pressure pin and spindle of chromium steel. Pressure pin operates in a life-time lubricated O-ring gland seal. O-ring seals are made of EPDM rubber. KOVM valve cones are made of EPDM rubber, and RA 2000, RAV and VMT valve cones are made of nitrile rubber. O-ring seals can be replaced without draining down the system. Valve bodies are designed for and tested in air conditioning systems. A Danfoss FV strainer is recommended for valve protection. Any water treatment or chemical cleaning agents should be free from mineral oil, which has a destabilising effect on EPDM rubber. RAV, hot/cold water valve KOVM, mixing valve VMT, hot/cold water valve BC-HSC VD.79.A2.02 Danfoss 12/93 15

16 Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice. This also applies to products already on order provided that such alterations can be made without subsequential changes being necessary in specifications already agreed. Danfoss Randall Ltd. Ampthill Road Bedford MK42 9ER Telephone: (0234) Fax: (0234) VD.79.A2.02 Danfoss 12/93 BC-HSC