EcoFlow Electronic Expansion System Type EES

Transcription

1 MAKING MODERN LIVING POSSIBLE Technical brochure EcoFlow Electronic Expansion System Type EES

2 Contents Page Introduction Features Approvals Variant configuration / ordering Spare parts Technical data Maximum Δp in reverse flow Function Application Mechanical installation Electrical installation Alarms Trouble shooting Modbus readout Control state and alarms are read-out in the parameter "Ctrl Status" EcoFlow Modbus Communication Parameters EcoFlow Modbus parameter list Dimensions and weights Appendix Instructions

3 Introduction EES are electrically operated expansion systems with integrated controller, designed for residential air conditioning and heat pump units. The EES system consists of a hermetically closed non serviceable valve and replaceable SHS sensor and controller. The EES system covers a range from 1 to 7 TR (24.5 kw) and 4, 6, or 8 outlets feeder tubes. Features The EcoFlow sytem EES consists of: Electronic Expansion Valve Distributor Feeder pipes Superheat Sensor SHS Driver Cables 4 functions in one - Expansion valve - Distributor - Controls - Solenoid valve function Continuous monitoring and optimization of the evaporation and superheat level Control of the evaporator circuits by one superheat sensor Eliminates maldistribution in the evaporator circuits Increased efficiency of evaporators Silent defrosting in heat pumps without reversing into a.c. mode Insensitive to variations in air flow over the evaporator Optimal superheat peformance Enables higher SEER/EER rating of existing systems One EcoFlow expansion system for a wide evaporator range Low energy consumption (0.6 W) Capacity up to 7 TR (24.5 kw) (R410A) Modbus communication For R410A and other HFC refrigerants Controls with failure diagnostic function Approvals Danfoss A/S (AC-SMC / bpv)

4 Variant configuration 0 1 G Controls Airconditioning (in-door) Standard 24 V a.c. Airconditioning (in-door) Modbus 24 V a.c. Heat pump (out-door) Standard 24 V a.c. Heat pump (out-door) Modbus 24 V a.c. Number of outlets [pc] 4 (max. 3 TR) 6 (max. 5 TR) 8 (max. 7 TR) A B C D Outlet connection type Solder, ODM 1 Outlet connection size [in] 1/4 in. G Outlet connection length [in] 12 in. 1 2 Inlet connection type Solder, ODF 2 Inlet connection size [in] 3/8 in. 5/8 in. Superheat sensor SHS, connection type Solder, ODF 2 Superheat sensor SHS connection size [in] 5/8 in. 3/4 in. 7/8 in. 1 1/8 in. Superheat sensor cable length 30 in. 3 0 Packing format Label Multi pack (8 pcs.) Industrial pack (16 pcs) Standard Customer specific (more information) 1 3 N P Q R M I S C Spare parts Electronic controller units Code no. Controls Air conditioning, standard 4 outlets 034F1500 Controls Air conditioning, standard 6 outlets 034F1501 Controls Air conditioning, standard 8 outlets 034F1502 Controls Air conditioning, Modbus 4 outlets 034F1503 Controls Air conditioning, Modbus 6 outlets 034F1504 Controls Air conditioning, Modbus 8 outlets 034F1505 Controls Heat Pump, standard 4 outlets 034F1506 Controls Heat Pump, standard 6 outlets 034F1507 Controls Heat Pump, standard 8 outlets 034F1508 Controls Heat Pump, Modbus 4 outlets 034F1509 Controls Heat Pump, Modbus 6 outlets 034F1510 Controls Heat Pump, Modbus 8 outlets 034F1511 Motor cable 034F1520 Super heat sensors Size Code no. 5/8 in. 034F1512 Super Heat Sensor, type SHS (single pack) 3/4 in. 034F1515 7/8 in. 034F /8 in. 034F1514 4

5 Technical data Product Enclosure EES controller EES (Electronic Expansion System) incl. SHS (Super Heat Sensor) NEMA type 1 / IP20 Electrical connection EES Power supply Modbus SHS sensor Spade tab mmspade CviLux CP LF CviLux CP3504P1V00-LF Cable connection Power supply Insulated spade crimp terminal, mm Cable connection Modbus Housing: CviLux CP crimp terminal: CP , or compatible, e.g. Molex Mini-Fit Jr. series Cable connection SHS sensor Housing: CviLux CP3504S crimp terminal: CP35TN21PES, or compatible, e.g. Molex Micro-Fit series Connection EES valve (pure copper) Connection SHS sensor (pure copper) Solder (see available sizes in variant configuration table) Solder (see available sizes in variant configuration table) Power supply 24 V a.c. 50/60 Hz / 32 V d.c., Class 2 supply Max. tolerance accepted of power supply a.c. ±20% d.c. +20%/-30% Power consumption 0.6 W Leak internal Leak external Max cm3/min. air at 5 bar Δp Max mbar/ls 100% He Ref.: 1 gr R410A / year (65 C, 45.5 bar) Capacity Regulating range Refrigerant 4 circuit valve max. 0-3 Tr / 10.5 kw 6 circuit valve max. 0-6 Tr / 17.6 kw 8 circuit valve max. 0-7 Tr / 24.6 kw 0-100% of max. capacity R410A Max. working pressure Saturated P for R410A at 149 F / 65 C 660 psi / 45.5 bar abs Max. Δp internal (air-con) 479 psi / 33 bar Max. Δp internal (heat pump) 217 psi / 15 bar Max. Δp reverse flow (check valve function) See check-valve pressure drop diagram page 6 Ambient temperature valve (operational) Media temperature valve (operational) Temperature transport, stock, not powered on Max. 131 F / 55 C Min. 14 F / -10 C Max. 144 F / 62 C Min. 5 F / -15 C -40 F / +158 F -40 C / +70 C Data communication Modbus (over serial line RTU E1) Load impedance Digital input wires max. 50 ft / 15 m SHS sensor wires max. 10 ft / 3 m Diagnostic functions Service LED alarm codes (flashing) and via Modbus Not serviceable SHS sensor can be replaced Controller can be replaced Danfoss A/S (AC-SMC / bpv)

6 Maximum Δp in reverse flow * Based on water measurements ** Based on mass flow at: Tc = 41ºF; 2.7ºF; 8ºF; SC = 7.2 F Number of circuits 8 MO 80% OD Valve type Active valve type Number of circuits: Refers to amount of evaporator circuits, hence number of feeder tubes Valve type: Can be Single Orifice (HP) or Multi Orifice (AC). Main difference is that the Single Orifice HP version offers the silent defrost feature. Active valve type: Refers to the test condition. The 80% OD refers to a system with two EcoFlow valves installed, one of the valves will be in reverse mode (in example above a 8 run air-conditioning valve) and one active regulating EcoFlow valve. In the test the regulating valve has been set to an opening degree of 80% (there are only flow through the reversed valve 80% of the time). OD = Opening Degree SO = Single Orifice (HP) MO = Multi Orifice (AC) SF = Steady Flow SH = Super Heat SC = Sub Cooling SF" means "steady flow". The description refers to a system with one EcoFlow valve installed, and one regulating TXV or EXV installed (there are a static flow through the reversed valve). Regarding the 4 run valves, there is no difference in pressure drop between the Single orifice (HP) and Multi Orifice (AC) version, therefore the 4 run curves have no valve type reference. OD detailed explanation: OD simply means opening degree and describes the open / close ratio for the EcoFlow. So, 80% OD means that if a full revolution of the distributor disc is 10 sec. (also called cycle time), then 8 sec. will be spend on injecting refrigerant into the evaporator, whereas 2 sec. will be used to rotate the distributor disc and/or have the valve paused in a closed position. 6

7 Function The EcoFlow contains 3 primary functions 1. Superheat sensor calibration 2. Minimum stable superheat adjustment 3. Distribution adaption 1. Superheat sensor calibration When the EcoFlow system is put into operation for the first time, a calibration sequence of the superheat sensor will start up. The procedure is to measure the saturated temperature-pressure for the refrigerant used in the system at the current operating conditions and thereby calibrating the SHS (Super Heat Sensor) for the refrigerant at the current condition in the system. The required time for the calibration process is up to 15 minutes. If the calibration is not successful, the process will continue up to 45 minutes after which an alarm will be initiated. (see chapters for alarms and trouble shooting). A lower cooling capacity can be expected during this process. Recalibration during operation A re-calibration will be initiated when the pressure has a certain deviation from the initial calibration point. The new calibration data will be added and stored together with the initial calibration calculation. After a number of calibrations have been done, the entire operational pressure range of the unit will be covered with calibration factors. Fig. 1 shows the collection and storing of the measured data. The final result of the calibration is an Approximated Saturation Curve for the refrigerant used in the unit. Replacing the SHS The calibration is only valid for the specific SHS with which the calibration was done. If the SHS superheat sensor is replaced in the system, or the SHS sensor is unplugged from the EcoFlow controller, a new calibration sequence is automatically started. Replacement of the superheat sensor must be done while the EcoFlow controlleris powered on otherwise the calibration process will not be started, with a high risk for refrigerant entering the compressor. Necessary conditions during the superheat sensor calibration The refrigeration unit should run constantly during the superheat calibration period. If the unit is shut off during the calibration, the calibration routine will restart at next start up. It is not allowed to increase or decrease cooling capacity during the calibration process. Multi and variable speed compressors should be kept at constant capacity during the calibration process and other changes in conditions must also be avoided. 2. Minimum stable superheat adjustment and control After superheat sensor calibration has been performed, the EcoFlow controller will start up the process to find the minimum stable superheat level for the unit at the running condition. The superheat reference is initially set to 10.8 F/6 K. From this superheat level, the controller will continue to adapt the superheat to the lowest possible stable superheat in the heat exchanger at the running conditions. A too low SH will immediately be detected via fluctuations in the superheat signal from the superheat sensor. (See fig. 2 below) The initial superheat adjustment will take approximately 30 minutes. When the lowest possible stable superheat level has been reached, the distribution adaptation system will start up in order to adjust superheat in each single evaporator circuit. The superheat is continuously controlled and kept at minimum at all operating conditions. Fig. 1 Fig. 2 Danfoss A/S (AC-SMC / bpv)

8 Function (continued) 3. Distribution adaptation The EcoFlow valve controls the injection into each evaporator circuit individually. This makes it possible to optimize the distribution for the evaporator. An optimized distribution will result in optimal efficiency and capacity for a given system. If the optimal distribution does not vary too much among individual systems of a certain model, the average optimal distribution for these systems can be preloaded in the valve. During normal operation at the end-customer, the distribution can be optimized either automatically by the valve itself or manually by the system master controller, if this is able to determine the optimal distribution. Automatic Distribution Adaptation The EcoFlow distribution controller will automatically adapt the injection in each circuit to get an optimal distribution in the heat exchanger. Method The adaptive distribution method takes advantage of the non-linear behaviour of the superheat of the refrigerant along the length of an evaporator circuit. The temperature at the beginning of the dry zone increases rapidly, and then increases more slowly, converging towards the air inlet temperature (counter flow). The EcoFlow controller tests how full a certain circuit is by adding slightly more refrigerant to this circuit, while reducing the amount to others, keeping the total mass flow constant. If the superheat measured by the superheat sensor drops, the circuit under test is sensitive to small changes in refrigerant flow and must have a quite small dry zone. Less refrigerant will be injected into the circuit from then on. If, on the contrary, the superheat is virtually unchanged, the dry zone must be rather large. In this case more refrigerant will be injected into the circuit from then on. The procedure is done in turn for all circuits. Figure 3. shows that the superheat temperature is increasing or decreasing rapidly when the liquid zone is close to the circuit outlet and the mass flow is adjusted. The distribution control is using this change in superheat to adjust the amount of refrigerant injected in each circuit. The distribution adaptation is an iterative procedure. The initial distribution adaptation of several iterations will take approximately 3-4 hours depending on the number of circuits in the heat exchanger design and the stability of the system. The cooling capacity during this process is not affected. If a significant change in conditions happens during an iteration, e.g. compressor or fan speed change, the iteration will be cut short. If the unit is shut off during the distribution adaptation, the process will continue at next start up. During normal operating conditions the distribution adaption system will optimise the distribution to remove changes in the mal distribution, by occasionally running a distribution adaptation iteration. Manual Distribution The master controller of the system has full control of the distribution, if it chooses so. In this case, the automatic distribution function will not be run, and any distribution found by it will be inactive. The manual distribution can be enabled and changed at any time via modbus communication with the EcoFlow. Distribution adaption hypothesis test Fig. 3 Blue Red 8

9 Function (continued) Silent Defrost in Heat Pump Applications In conventional heat pump systems, defrost is done by system reversal or electrical heaters, both of which impose a large penalty on capacity and efficiency. Taking advantage of EcoFlow controlling the refrigerant injection into each evaporator circuit independently, it is possible to avoid conventional defrost at ambient temperatures above freezing. Instead, a control scheme called Silent Defrost is employed. During Silent Defrost, one or two circuits at a time get no refrigerant injected. The ambient air with a temperature above freezing will remove the frost that has built up on the circuits that get no injection. By keeping the cycle time between silent defrost of each circuit much shorter than the traditional defrost cycle, only a small amount of frost will have accumulated during one cycle. This small amount can quickly be removed. In this way, the system can run without traditional defrost Fig. 4 =Frost Product type File name Date Figure 4 shows a snap shot of the defrost cycle with frost is shown as ice crystals. In this example with four circuits, the circuits are Silent defrost defrosted one at a time in the sequence 1, 2, 3, 4, 1, 34F40 2. Currently circuit 3 is defrosting. The refrigerant at the beginning of circuit 3 will soon have boiled I.S away, after which the last frost on the circuit will be removed. Circuit 2 which was defrosted just before circuit 3 has only accumulated a little frost, circuit 1 has accumulated some more and circuit 4 has accumulated most in this snap shot. Circuit 4 will be defrosted next. Capacity and energy efficiency advantage In Figure 5, the capacity of a system with conventional defrost is compared to the same system equipped with an EcoFlow valve running silent defrost. The conventional system gradually loses capacity as the coil accumulates frost. At some point, defrost by system reversal is necessary. The EcoFlow system, on the other hand, keeps a constant capacity as long as the ambient temperature is above freezing. If the system using conventional defrost has a very good distribution, it can have a slightly larger peak capacity when the circuits are still frost free. This is because the conventional system simultaneously injects refrigerant in all circuits when the system is not defrosting, while one or two circuits are out of play at any time in the EcoFlow system in silent defrost mode. 9

10 Function (continued) However, as shown in figure 5, the blue area which is the integrated capacity advantage of the EcoFlow system, is many times larger than the red area where the conventional system has a slightly higher capacity. The energy efficiency of both systems will have a variation (development) over time similar to the variation (development) in capacity. Fig. 5 Initiating a Silent Defrost and how it is done The silent defrost system is initiated and controlled and operated by the unit master controller via Modbus communication (see Modbus parameter list PNU, page 14). The master controller must switch the EcoFlow valve to manual distribution, when silent defrost is initiated. Subsequently the manual distribution factor of the circuit(s) to be silently defrosted must be set to 0. After completing silent defrost of the circuit, the distribution factor of the circuit(s) must be set back to its original value. The optimal defrost time for each circuit as well as the optimal defrost sequence ofthe circuits are found during the manufacturer s testing of the unit. When the defrost process of all the circuits has been done the same circuit sequence will be followed again for the next defrost. (Normally yes, but it is entirely up to the master controller). The defrost process can either stop for a selected time or can operate continuously depending upon application and experience. Distribution Adaption during Silent Defrost The distribution adaption system will not run during a Silent Defrost. However, it is recommended for the master controller to use the automatically found optimal distribution factors for the circuits in operation (i.e. those not under silent defrost). 10

11 Application Air conditioning summer SGN+ Danfoss 34F12.10 Heat pump - Winter Product type Diagram No.1AC File name 34F12 Date I.S SGN+ Danfoss 34F15.10 Product type File name Diagram No.2 Heat pump 34F15 Danfoss Date A/S (AC-SMC / bpv) 04 I.S

12 Application (continued) Reversible Split System Summer operation Danfoss 34F18.10 SGN+ B Reversible Split System Winter operation Danfoss 34F16.10 SGN+ B Product type File name Diagram No.3 Winter 34F16 12 Date I.S

13 Application (continued) Mechanical installation Indoor units Danfoss recommends installing the EcoFlow valve on the side of a indoor evaporator coil as shown on fig. 6. This allows smooth bending and length adjustment of the feeder tubes and also a good fastening via a bracket bolted to the mounting holes on the EcoFlow valve body. Danfoss also recommends to mount a cover for additional protection of the electronic board as protection against water drops. Fig. 6 Outdoor units In outdoor units Danfoss recommends to install the EcoFlow in, or in connection with the compartment for the sensitive electronic components as seen in fig. 7. This secures that no snow or rain will penetrate into the electronic board in the EcoFlow valve. Having the EcoFlow board in the electronic compartment allows easy access for the cables and virtual access to the alarm LED on the EcoFlow board. Fig. 7 In outdoor units Danfoss recommends to install the EcoFlow electronic board in compartment for the sensitive electronic components as seen in fig. 8. This secures that no snow or rain will penetrate into the electronic board in the EcoFlow valve. Having the EcoFlow electronic board in the electronic compartment allows easy access for the cables and virtual access to the alarm LED. Fig. 8 13

14 Application (continued) Mechanical installation (continued) Correctly Dimension of the Liquid Line To obtain a correct supply of liquid to the EcoFlow valve: The liquid line to the EcoFlow valve must be correctly dimensioned The liquid refrigerant flow rate should not exceed 1 m/sec Dimensioning of the liquid line must be based on the capacity of the EcoFlow valve Dimensioning of the liquid line must not be based on the capacity of the evaporator This must be observed on account of the pressure drop in the liquid line (lack of subcooling) and pulsations in the liquid line Electrical installation Stand alone (no Modbus) Fig. 9 Modbus version Fig

15 EcoFlow Modbus Connection SHS Modbus 24 V a.c. ±20% 32 V d.c. + 20/-30% Supply Danfoss A/S (AC-SMC / bpv)

16 Requirement to Installation Modbus over serial line (RTU E81) Related standards: Application: modbus protocol ver1.1b. (0 03/0 04, 0 06, 0 10 and 0 2b commands are supported) Datalink layer: MODBUS over serial line specification and implementation guide only baud is supported no inter-character checking implemented (not relevant for devices with UART function) Physical layer: RS485 according ANSI/TIA/EIA-485-A-1998 common is not implemented to avoid ground loops, instead EcoFlow offer shield connection Cable length A cable length must not exceed 1200 m Important! Our experience indicates that problems can occur with communication due to the following weaknesses: Long wire ends Do not strip more of the cable insulation than strictly necessary. Max. 3-4 cm. Continue the twisting of the cables right up to the terminals. Stubs Avoid stubs on the cable. Feed the cable right to the end and then back again. Cable type Cables twisted in pairs must be used, and they may be provided with a screen. Some types of communication require a cable with a screen to be used. The conductor s cross section must be at least 0.60 mm. Examples of cable types: Belden 7701NH, single-thread mm, without screen Belden 7702NH, single-thread mm, without screen Belden 7703NH, single-thread mm, with screen Belden 7704NH, single-thread mm, with screen LAPP UNITRONIC Li2YCY (TP), multi-thread mm, with screen Dätwyler Uninet P, single-thread mm, with screen Conductors The wires in the cable that is connected to the controller must be correct. Although there are four wires in the cable inside the screen, you cannot simply choose colours freely. The wires are twisted in pairs, i.e. 2 and 2, and you must use a pair that is twisted around each other. If there are several vacant wires in the cable, they must be used for nothing else than data communication. Noise sources Keep the cable away from electrical noise sources and power cables (relays, contactors and especially electronic ballast for strip lights are strong noise sources). A distance of at least cm will be sufficient. Cable length extremities Each section of data communication must be terminated correctly. See the relevant communication form on the following pages. Screen See the respective communication forms. Danfoss A/S (AC-SMC / bpv)

17 Requirement to Installation (continued) Cable tray MOD bus wiring When the cable is ducted with other cables, there is a strong risk that electrical noise will be transferred. Keep away from live cables. The cable must be with screen. The cable is connected from controller to controller, and no branches are allowed on the cable. If the cable length exceeds 1200 m a repeater must be inserted. Number of controllers The total number of controllers on an MOD bus connection can be 100. Conductors When the cable is ducted in a cable tray, the cable must be fed out and right up to the controller. The fast solution where only wires are fed out will cause problems. The wires are looped from device to device. A is connected to A B is connected to B. The screen must be connected to the system device, all controllers and any repeaters. A screen must always be looped from device to device. The screen must not be connected to anything else. (The screen is earthed inside the system device and must not be earthed in any other way.) Min cm Keep a distance to relays, their cables and other things emitting electric noises. Danfoss A/S (AC-SMC / bpv)

18 Alarms LED flash Symbol Error code Read-out to Modbus via CtrlStatus Alarm Description 1 flash and pause 10 seconds N/A N/A Power on - No error 2 flashes and pause one second 1 Yes Controller fault alarm Superheat sensor reading error Eeprom write error 3 flashes and pause one second 2 Yes Superheat sensor fault Disconnected sensor Shortcut in sensor 4 flashes and pause one second 3 Yes Valve malfunction Hall sensor error Motor malfunction 5 flashes and pause one second 4 Yes Opening degree of valve on max. for more than 6 hours Lack of capacity due to out-door temperature Flash gas Loss of refrigerant charge Low condenser pressure Blocked filter drier 6 flashes and pause one second 5 Yes Calibration was not possible after 5 calibrations The parameter CtrlStatus (register number 3100 bit mapped status) is used to read-out the alarm status and the controller state via modbus interface. The wctrlstatus is also used to set the EcoFlow LED alarm flashing. SHS Modbus 24 V a.c. ±20% 32 V d.c. + 20/-30% 18

19 Trouble shooting Error Code Description Trouble shooting Controller fault alarm due to adc_error or Eeprom write error Super Heat Sensor fault due to disconnected sensor or a shortcut in the sensor Valve malfunction due to - Hall sensor detection error or defective hall sensor - Motor or motor-wiring malfunction - Obstruction of rotating valve part Opening degree of valve on maximum for more than 6 hours Automatic calibration of the SHS in the system was not possible after 5 attempts The controller must be replaced, see spare parts page Check if the SHS is connected properly to the EES controller 2. Disconnect the SHS sensor cable from controller and measure the resistance between the pins in the SHS plug. (See fig. 12 table 2) 3. If a shortage or break is measured in the SHS, the sensor must be replaced. Warning! Disconnection of the SHS sensor when the EES is powered up will initiate a SHS calibration routine in the EES controller. See page x chapter yyyy. SHS sensor service and disconnection should be done while the EES and the compressor are disconnected from the power supply. 1. Reboot the system, and check if motor is running (Valve buzz/ vibrate slightly) a. If error reoccurs - proceed to 2 b. If error does not reoccur - possibly periodic failure 2. Check wire and plug connections between PCB and valve 3. Check the motor coil resistance: unplug cable at PCB side, and check resistance. See fig. 13 and table 3 a. If inside tolerances, go to 4 b. If outside tolerances, dismount motor wire at valve side and check motor coil resistance on glass seal pins. See fig. 11 and table 1. Warning: Dismantling the plug will damage the cable for good, fig. 15. i. If outside tolerances, motor is defect. Valve should be replaced. ii. If inside tolerances, replace the motor cable. 4. Measure hall sensor signal from PCB with oscilloscope. See fig. 14. Nominal voltage 2.5 ± 0.1 V d.c.. When the power is turned on, and the motor rotates, the signal should oscillate about 2 times per second. With an amplitude of V, and a period time of about 50 ms. 1. Lack of cooling capacity due to high outdoor temperature 2. The condenser pressure is too low 3. The filter drier is blocked and needs replacement 4. Flash gas in the liquid line due to loss of refrigerant or undercharge of refrigerant 1. Check if the evaporator conditions are stable during the calibration (compressor capacity, fan speed, no flash gas) 2. Check if the evaporator is overfilled for a short time during the calibration routine (if not then the valve can not give enough injection Fig. 11 Table X 28Ω ± 10Ω Min. 100 MΩ Min 100 MΩ 2 28Ω ± 10Ω X Min. 100 MΩ Min. 100 MΩ 3 Min. 100 MΩ Min. 100 MΩ X 28Ω ± 10Ω 4 Min. 100 MΩ Min. 100 MΩ 28Ω ± 10Ω X Danfoss A/S (AC-SMC / bpv)

20 Trouble shooting (continued) Fig. 12 Table N/A kω N/A N/A kω N/A N/A N/A 3 N/A N/A N/A kω 4 N/A N/A kω N/A 4 (black) 3 (yellow) 2 (grey) 1 (red) Fig. 13 Table 3 1 (red) 2 (grey) 3 (yellow) 4 (black) 1 X 28Ω±10Ω Min.100 MΩ Min.100MΩ 2 28Ω±10Ω X Min.100 MΩ Min.100MΩ 3 Min.100MΩ Min.100MΩ X 28Ω±10Ω 4 Min.100MΩ Min.100MΩ 28Ω±10Ω X Signal from hall sensor (left most solder point) GND (lift the jumper and measure left pin) Fig

21 Trouble shooting (continued) Dismantling of motor plug connection: The electrical plug connection between valve and electronic cable is a snap-lock connection. Using the wrong dismantle method will destroy the plug, and could damage the valve. This is how it should be done: Rotate the cable gently round and round at least 10 times, as shown on the pictures, while pulling with maximum 1 kg force. Be sure to keep the pull constant while changing pull direction 360 around and around Only tilt about Only pull with a maximum force of 1kg. Do not use tools to dismantle. This will most likely destroy the plug. The cable will come gently of when both snap-locks are disengaged. By pulling to hard, or tilting to much, the plug will be damaged, and has to be replaced. Also female plug on the valve can be damaged, resulting in a damaged valve. Fig

22 Modbus readout The following control states are defined: Control state value read-out via CtrlStatus Comments 1 Initialize (find hall signal) 2 Test mode - flow test 3 Injection off 4 Control error state 5 Calibration of superheat sensor 6 Superheat control 7 Adaptation-algorithm Control state and alarms are read-out in the parameter "Ctrl Status" Control state and alarm information are bit mapped in the controller status word Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 (512) Bit 8 (256) Bit 7 (128) Bit 6 (64) Bit 5 (32) Bit 4 (16) Bit 3 Bit 2 Bit 1 Bit 0 For future use Alarms Not used Control state Fig. 15: Controller status word Control status word are read-out in parameter "Ctrl Status" bit 0...3: Control state (Decimal: ) 1: Initialize (find hall signal) 2: Test mode - flowtest 3:Injection Off / no control 4: Fault state 5: Calibration of superheat sensor 6: Superheat control 7: Distribution control 8-15: for future use Examples: If read-out to "Ctrl Status" = 6, then we are in superheat control (control state = 6) and no alarms active If read-out to "Ctrl Status" = 68, then we are in control state = 4 and have an active superheat sensor alarm. bit 4...9: Alarms 4: Not used 5: Controller input-or EeProm fault 6: Superheat sensor fault 7: Motor or hall sensor fault 8: System fault (fx. Flash gas) 9: Calibration fault 10-15: for future use bit : For future use Danfoss A/S (AC-SMC / bpv)

23 EcoFlow Modbus Communication Parameters Parameter Value Bitrate bit/s Data bits 8 Stop bit 1 Parity Even Device no. Default: 5 EcoFlow Modbus parameter list The following sections define the parameters Row text Explanation PNU The Parameter Number in the EcoFlow controller Min Minimum value Default Factory default value Max. Maximum value e 2 Is the value stored in E 2 PROM? The maximum numbers of changes are 1000,000 W Is writing from the communication channel possible? 10 N Scaling of parameter. All values are read and written as integer values over modbus, but some parameters are multiplied by the scaling factor after reading over modbus to get the real value, and divided before writing over modbus Comments Short function description PNU MIN Default Max e 2 W 10 N Symbolic name Comments 117 0: Off 1: On 1 : On r12 Main switch Off: The valve stands still at a closed position. On: The valve rotates, injecting into the circuits Ctrl Status Bit mapped status Comp Speed Compressor speed [%] o03 Unit addr. Device unit address Unit 2 addr. Device unit address bynumcirc Number of Circuits 4, 6, or : auto 1: auto 2: man byshctrlmode Superheat Control Mode In manual mode, the superheat is controlled externally using register Manual Opening Degree In automatic mode, the superheat is controlled to the superheat reference, which is read from Manual Superheat reference if Superheat Reference Control is set to manual. If is set to automatic, the superheat reference is adjusted automatically fish Superheat (K) The current superheat measured with the superheat sensor flmanualod Manual opening degree in percent Used when Superheat Control mode is set to Manual. 0 opening degree corresponds to the lowest capacity, 1000 corresponds to maximum capacity Superheat Reference Control Mode When automatic, the superheat reference is controlled to the lowest value where the superheat can be controlled stably, but not lower than the : auto 1: auto 2: man byshrefctrlmode value of Automatic Superheat Reference Minimum. When Manual, Manual Manual Superheat Reference is used as a fixed superheat reference. Ignored if Superheat Control is set to Manual (3K) flmanshref Manual Superheat Reference Used as the superheat reference when Superheat Reference Control is set to Manual Ignored if Superheat Control mode is set to Manual Automatic Superheat Reference Control Minimum (2K) flautoshrefctrlmin The lowest allowed superheat reference when Superheat Reference Control is set to Automatic. Ignored if Superheat Control is set to Manual 23

24 EcoFlow Modbus parameter list (continued) PNU MIN Default Max e 2 W 10 N Symbolic name Comments : auto 1: auto 2: man bydistribmode Distribution Mode When in Automatic Mode, the distribution among the circuits will be optimized automatically. In Manual Mode, the distribution is set using registers imandistribcirc_1 Manual Distribution Factor for Circuit 1 in percent compared to an equal distribution between the circuits (100% for each circuit). Active when Distribution Mode is set to Manual. Ignored if is set to Automatic imandistribcirc_2 Manual Distribution Facotr for Circuit 2 See imandistribcirc_3 Manual Distribution Factor for Circuit 3 See imandistribcirc_4 Manual Distribution Factor for Circuit 4 See imandistribcirc_5 Manual Distribution Factor for Circuit 5 See Ignored if number of circuits is imandistribcirc_6 Manual Distribution Factor for Circuit 6 See Ignored if number of circuits is imandistribcirc_7 Manual Distribution Factor for Circuit 7 See Ignored if number of circuits is 4 or Manual Distribution Factor for Circuit imandistribcirc_8 See Ignored if number of circuits is 4 or iautodistribcirc_1 Automatic Distribution Factor for Circuit 1 in percent compared to an equal distribution between the circuits (100% for each circuit). Active when Distribution Mode is set to Automatic iautodistribcirc_2 Automatic Distribution Factor for Circuit 2 See iautodistribcirc_3 Automatic Distribution Factor for Circuit 3 See iautodistribcirc_4 Automatic Distribution Factor for Circuit 4 See iautodistribcirc_5 Automatic Distribution Factor for Circuit 5 See iautodistribcirc_6 Automatic Distribution Factor for Circuit 6 See iautodistribcirc_7 Automatic Distribution Factor for Circuit 7 See iautodistribcirc_8 Automatic Distribution Factor for Circuit 8 See Danfoss A/S (AC-SMC / bpv)

25 Dimensions and weights J K EES Type EES Connection A B C E F G J K L Weight in in mm in mm in mm in mm in mm in mm in mm in mm in mm lb kg 3/ /8 SHS Type SHS Size in L (in / mm) H (in / mm) Cable length (in / mm) Weight (oz/ gr) 4.9/ 140 5/8 5.5/ 156 3/4 6.7/ / / 65 30/ 140 7/8 6.7/ / /8 6.7/ /

26 Appendix Application Danfoss 34F30.10 Step 1 Step 2 Step 3 Mounting direction Brazing Rotation Max F (660 C) Max. 158 F (70 C) Injection sequence Connections/ Diagnostic SHS Modbus 20 V a.c. ±20% 32 V d.c. + 20/-30% Danfoss A/S (AC-SMC / bpv)

27 Electrical connection Weather protection SHS Mounting of SHS Soldering of SHS Max F (660 C) SHS Mounting direction SHS Mounting direction SHS 27

28 28