ENA. Flamco. Installation, maintenance and operating instructions. This manual must be passed to the end-user, and stored with the ENA.

Transcription

1 VENT/TOP-UP APPLIANCE ENA This manual must be passed to the end-user, and stored with the ENA. VEN2302

2 Dear customer, In purchasing the ENA, you have chosen a quality product. This patented vent/top-up appliance offers you reliability in operation and ease of installation, and ease of programming in commissioning. On the following pages, you will find instructions for configuration, installation, commissioning, operation and programming the ENA. If you read the instructions carefully, you will be able to achieve optimum output from your heating installation. These instructions must be passed to the end-user, and stored in the immediate surroundings of the ENA. All parameters required can be set quickly and easily. Operating status and/or error messages will be shown on the display and appear on the control panel in the guise of either green or red LEDs. We have paid a great deal of attention to these installation instructions. Nonetheless, should your questions on the ENA remain unanswered, we will, of course, be pleased to answer them for you. Liability waiver All information contained in this manual pertaining to installation state of the art on going to press. The information covers all our experience and know-how amassed to date. We reserve all rights to make alterations at technical level as a consequence of future developments in the products described in this manual. For this reason, no rights may be derived from the technical details, descriptions and figures herein. Technical illustrations/drawings and graphs do not necessarily match the actual articles supplied, i.e. modules, components or spare parts. The drawings are not reproduced to scale, though they do show symbols for simplification. UK Limited Unit 4, St. Michael s Road Lea Green Industrial Estate St. Helens, Merseyside WA9 4WZ United Kingdom Tel.: Fax: info@flamco.co.uk b.v. P.O. Box AC Gouda Netherlands Tel.: Fax: support@flamco.nl 2

3 Contents Section Page 1. General Overview of the basic components Technical data 6 2. Function Installation diagram for the ENA in an installation with external control of topping-up plus expansion tank ENA installation diagram for a heating installation comprising diaphragm-expansion tank(s) Description of the vent/top-up function Venting Topping-up 8 3. Set-up area 9 4. Installation Water-side connections Electrical wiring 9 5. Commissioning Programming Setting the display language Programming the venting cycles Programming the topping-up Topping up installations with a diaphragm-expansion tank Topping up installations with pressure stabilization by expansion tanks Programming the top-up time Malfunctions Troubleshooting list General Resetting after an error message Other dangers Maintenance and recurring inspection 16 Appendices 1: Short manual for programming the ENA control panel in installations with a diaphragm-expansion tank 17 2: Short user guide for programming the ENA control panel in installations with an expansion tank 18 3: Connections in the ENA control panel 19 4: Clamp connections in the ENA 1 - ENA 3 control panels 20 3

4 1. General The ENA vent/top-up appliance can be used in both closed central-heating installations with a maximum permitted feed temperature of 120 C and in closed refrigeration/air-conditioning installations. The maximum inward temperature to the ENA is 70 C. The ENA is available in three pressure categories: ENA 1 : bar. ENA 2 : bar. ENA 3 : bar. The user has the option of two venting methods: Turbo venting : quick and effective venting immediately after installation of the ENA without pausing between the vent cycles. Normal venting : energy-saving method in which pauses can be programmed in between the vent cycles. This method only vents as much air as is necessary. In the case of both the above methods, it is possible to program nine different cycles each time using code numbers. The same numbers are shown on the display. The ENA 1, ENA 2 and ENA 3 can be deployed in installations, which means that the expansion is absorbed by means of: - diaphragm expansion tanks or - expansion appliances. All the appliance parameters can be transferred to a building-management system (BMS) via the RS 485 interface. The ENA is self-monitoring due to its plausibility control which scrutinizes the sensor values. The malfunction log can be accessed via a potential-free make-and-break contact. There is a diagram on the control panel showing the switch elements of the ENA. RED and GREEN LEDs show the current status of operation. It is easy for the user to program the control panel to the desired language. 4

5 1.1 Overview of the basic components Vacuum tank made of stainless steel. 2. Control via control panel. 3. Pump(s). 4. Connection from the system 3/4. 5. Connection to the system 3/4. 6. Top-up connection 3/4. 7. Float vent with aeration stop. 8. Appliance foundation plate. 5

6 1.2 Technical data Operating parameters ENA 1 ENA 2 ENA 3 For installation volume to Pressure range of the ENA (bar) Inward pressure, top-up connection (bar) Design pressure Max. pressure in the installation Medium temperature ( C) Top-up temperature ( C) Ambient temperature ( C) Noise level Electrical connection rating of the pump(s) 80 m m m 3 1,3-3,5 2,0-4,5 3,0-8,0 2-8 inc. 2-8 inc. 2-8 inc. 8.0 bar at 120 C 8.0 bar at 120 C 10.0 bar at 120 C 8.0 bar 8.0 bar 10.0 bar approx. 55 db(a) approx. 55 db(a) approx. 55 db(a) 230 V 230 V 230 V 1 x 1.1 kw 1 x 1.51 kw 2 x 1.1 kw Connections, dimensions, weights Connection from system Connection to system Top-up connection Length x width x height Weight Rp 3/4 (internal) Rp 3/4 (internal) Rp 3/4 (internal) Rp 3/4 (internal) Rp 3/4 (internal) Rp 3/4 (internal) Rp 3/4 (internal) Rp 3/4 (internal) Rp 3/4 (internal) 728 x 325 x x 325 x x 525 x 1250 approx. 40 kg approx. 45 kg approx. 60 kg Electrical wiring data Power Voltage Recorded output Fuses Safety rating (pump and control panel) Interface Potential-free contacts 1 x 230 V / 50 Hz 1 x 230 V / 50 Hz 1 x 230 V / 50 Hz 5.3 A 7.2 A 10.6 A 1 x 1.1 kw 1 x 1.51 kw 2 x 1.1 kw 16 A 16 A 16 A IP 54 IP 54 IP 54 RS 485 RS 485 RS 485 Malfunction log and top-up contact ENA 1 ENA 2 ENA 3 6

7 2. Function 2.1 Installation diagram for the ENA in an installation with external control of topping-up plus expansion tank. Malfunction log, RS European plug (CEE 250 V) ENA control panel External connection from top up Pump Float switch Vacuüm pressure switch 9 16 P Closed under normal circumstances Open under normal circumstances Rp 3 /4" Separate accessories/ NFE filler unit Rp 3 /4" m 3 Topping up 5 P E.g. compressor unit Pressure stabilization Expansion tank SK1562/02 SK1562.wmf Rp 3 /4" B Installation return pipe Seal (lockable) which can be fitted by the engineer as an option A Rp 3 /4" 2.2 ENA installation diagram for a heating installation comprising diaphragmexpansion tank(s) Contact malfunction log RS 485 European plug (CEE 250 V) ENA control panel Pressure sensor (top up) Pump Float switch Vacuüm pressure switch Closed under normal circumstances Open under normal circumstances Topping up Separate accessories/ NFE filler unit Rp 3 /4" Rp 3 /4" Pressure stabilization Diaphragm pressure expansion vessel Rp 3 /4" Rp 3 /4" B Installation return pipe Seal (lockable) which can be fitted by the engineer as an option A 1. Vaccum tank. 2. Pump(s). 3. Control unit. 4. Volume current limiter. 5. Pressure sensor. 6. Float switch. 7. Float vent. 8. Air admission block. 9. Pressure gauge. 10. Non-return valve. 11. Solenoid valve. 12. Filter. 13. Ball cock. 14. Non-return valve. 15. Solenoid valve. 16. Vacuum pressure switch. 7

8 2.3 Description of the vent/top-up function Venting (see figs. 2.1 and 2.2) Venting is the ENA s primary function. The ENA acts as a bypass connected to the installation s return pipe in the flow direction. The pump (or pumps) works in cycles; this therefore also applies to the venting. What this implies is that part of the flow is fed from the installation s return pipe via the ball cock (13), filter (12), solenoid valve (11), non-return valve (10) and the flow-volume limiter (4) to the vacuum tank (1). The vacuum tank is where venting takes place, under low-pressure conditions. This entails that the pump (2) creates conditions conducive to low-pressure in cycles. The low pressure is created with the help of two specially-fitted flow-volume limiters (4). The steep drop in pressure in the ENA causes a similar drop in the solubility of the air in the medium. The gases, having been dissolved, are released. This process is enhanced by introducing water through a grille fitted with PALL rings. This creates a significantly larger surface on which air bubbles can collect, enlarge and rise into the tank. We call this streamlined venting. The de-aerated water thus created can be fed back into the installation at point B via the pump (2), flow-volume limiter (4), non-return valve (10) and the ball cock (13). The duration of the venting cycles depends on the pressure at which the installation is operating. The gases separated from the water are discharged from the vacuum tank automatically via the float vent (7) when the pump is switched off (once per cycle), that being when the pump is filled with water at a pressure lower than that at which the installation is currently operating. During the filling process, the ENA tank will remain below installation operating pressure until shortly before the installation pressure begins to build. This is because most of the filling time is earmarked for venting. During the venting, solenoid valve 11 is permanently open and the solenoid valve 15 is permanently closed Topping-up Drops in volume are caused by venting and leakage in the system. They can be compensated by automatic topping up. While venting an active appliance is continuous (subject to the pre-set cycles), topping up is relatively sporadic. Topping up can be effected in a number of different ways: 1. With the pressure sensor (5) in installations which work with a diaphragm pressure expansion tank. The diaphragm pressure expansion tank monitors the pre-programmed top-up pressure (P in), activating the top-up procedure when the installation operating pressure falls below that pressure. 2. With signals provided by the expansion tank control panel, when the control panel display shows the minimum level. If this is the case, solenoid valve 11 will be closed while, at the same time, solenoid valve 15 will be opened (the opposite of the situation during venting). The top-up amounts will then function as safety margins depending on the hysteresis setting/top-up time limit. The water-side configuration ensures that even the topped-up water is vented before reaching the installation. During topping up, solenoid valve 15 is permanently open and solenoid valve 11 is permanently closed. 8

9 3. Set-up area The area must be dry, clean and free from frost. The area must be closable and not accessible for unauthorized personnel. The ENA must be positioned vertically on a clean, flat surface which has access to the water supply. There must also be mains power available at 230 V - 50 Hz; the fuse box must be fitted with a 16 A fuse and have an earth-leakage switch set to 0.03 A. The ambient temperature must be between 0 and 45 C, with relative humidity of max. 90%. 4. Installation 4.1 Water-side connections The ENA must at all times be fitted in the return pipe of the installation. The connection method is reproduced in the installation diagram under points 2.1 and 2.2 on page 7. There must be a minimum distance of 1 m between connection point A (water intake from the system) and point B (water discharge to the system). All nominal pipe diameters on the ENA comply with DN20 (Rp 3/4 ). The pipes between the return pipe and the ENA must be as short as possible. During installation, please be aware that no pollutants such as hemp, PTFE residue, burrs, shavings or other alien objects get into the ENA. If a non-return valve (NFE 1 or NFE 2) is required by law, it must be fitted by the local engineer. Note: non-return valves must always be fitted horizontally. If there is no non-return valve with dirt trap fitted to the top-up device, a dirt trap with mesh of max mm must be fitted as a bare minimum. In addition, local ordinances/guidelines issued by the water company must be observed. The ENA must be connected to the return pipe in such a way that the return pipe is not biased to influence the pressure reading adversely. Please also be aware that the temperature in the return pipe must not exceed 70 C. The engineer may fit a valve between connection points A (intake from the system) and B (water discharge to the system) in the return pipe, so that even when the heating system is switched off, venting and topping-up can continue. 4.2 Electrical wiring The ENA is ready to use and is supplied with two metres of cable and a European plug (CEE 250 V). This means that the sole requirement is a mains socket compliant with point 3, i.e. one for a CEE 250 V European plug with a valid KEMA approval mark. Design features of the control panel: - Voltage : 230 V, Europe 240 V (BS 1363 i.e V) - frequency : 50 and 60 Hz - electricity : 16 A. The electric safety category is IP 54. The national and/or local electrical installation regulations must be observed at all costs. Note: No electrical cables may be attached to the tank (due to heat radiation). 9

10 5. Commissioning The conditions for switching on the venting/topping-up appliance are the following: - water-side connections must comply with the regulations and the connection diagram (see points 2.1 and 2.2 on page 7); - electrical wiring must comply with the regulations and point 4.2 on page 9; - the installation s vacuum tank and piping must be filled with installation medium; - the pump(s) must be properly vented (via the bleed screw in the pump - the pump must not be running); Remember: The bleed screw must not be fully unscrewed. Keep venting until air-free water is emitted. - the expansion tank must be operative; - the ENA must be programmed to the desired operating levels; - the top-up pipe must be connected and the relevant ball cock must be open; - the jumper (ST 2) (in the control box) must be fitted appropriately (see figure). (Photo of ENA control panel, insert, top left) (for position, see also appendix 4, page 20) Printed circuit board ST 2 ST 2 free = expansion tank in position = diaphragm expansion tank ST 2 The ENA 1, ENA 2 and ENA 3 can be deployed in installations, which means that the expansion is absorbed by means of: - diaphragm expansion tanks or - expansion appliances. The action of fitting the jumper (ST 2), adds Top-up pressure to the menu; this means that Top-up ON and Top-up OFF can be programmed. If the jumper (ST 2) is not in position, the Top-up item in the menu will not be available, as the signal for topping-up will come from the expansion tank control panel in that case. The ENA is factory-fitted for use in installations with diaphragm pressure expansion vessels, i.e. the jumper (ST 2) is in place. When the appliance is switched on, the display will light up (2 x 16 characters). Line 1 Pressure: x.x bar Line 2 Venting: Turbo x (x = 1-9 inc.) or Normal x (x = 1-9 inc.) After 60 seconds, the venting process will begin, if the float switch (6) which has been activated is not switched to malfunction, or one or more of the pumps has its motor safeguard activated. If the parameters (Pressure in the system <, pressure topping-up ON or the top-up signal from the expansion tank) for topping-up are available, water will be fed in via valve 15. This action closes valve 11. Note: Do not touch the vent tank during use. It may burn you. 10

11 6. Programming The control panel and operating panel of the venting/topping-up appliance is ergonomically positioned. The ENA can be operated and programmed easily with just four keys. (see figure) Example of display Pressure: 3.5 bar Venting: Turbo 5 Menu choice Back Next Enter 6.1 Setting the display language At time of going to press, there are two languages available: - English; - German. They can be set as follows: Press the [+] and [-] keys simultaneously for 10 seconds. The display will show: SPRACHE (Language) DEUTSCH (German) If the language is to be changed, press the [+] key briefly. The display will show: LANGUAGE ENGLISH Once the desired language is shown on the display, briefly press: The standing display will reappear: PRESSURE X;X BAR PRESSURE X;X BAR VENTING TURBO x or VENTING NORMAL x s default language is German. 6.2 Programming the venting cycles The venting process is cyclical, i.e. the pump switches off after a pre-set time and switches back on again after another pre-set time. In this respect, there is a difference between: - quick venting = Turbo; - normal venting = Normal. The diagram below applies to both methods of venting. Pump ON Pump OFF 0 s = switch on 60 s t 1 t 2 t 1 t 3 t 3 Time Legend: t 1 = pump running time; t 2 = pump resting time; t 3 = duration of one cycle. 11

12 The pump running time (t 1) depends on the pressure in the installation and is constant, as the following table shows: Type Pressure t 1 (bar) (s) ENA ,0-3,3 27 3,3-3,5 32 ENA ,2-4, ENA ,5-7,5 26 7,5-8,0 35 This pressure-dependent pump running time (t 1) applies to both Turbo and Normal venting. Turbo venting Turbo mode is intended for quick and effective venting immediately after installation of the ENA. (However, this mode may be used at any time). During turbo venting, the pump rest time (t 2) is always 40 seconds. This time (t2) is constant and cannot be altered. So that the ENA can switch from Turbo to Normal after a certain time has elapsed, the running time must be programmed. The running time of Turbo mode is programmed via code number x. The code numbers can be programmed from 1-9 inclusive; the higher the code number, the longer the running time. For example: Code number 1 5 hour Turbo venting; Code number 9 75 hour Turbo venting. Below are the running times for turbo venting as a function of the code numbers. Code number x Running time of turbo venting in hours sets the default value of x at 4. (= 20 hours) Instructions for programming the code numbers can be found in the short instructions contained in appendices 1 and 2. Normal venting In contrast to turbo venting, normal venting, t 2 (pump rest time) is variable and the cycles (t 3) run continuously. Programming is once again by means of code number x. The code number can be programmed from 1-9 inclusive; the higher the code number, the shorter the pump interval. For example: Code number 1 pump off for 40 minutes; Code number 9 pump off for 4 minutes. As a general rule: The larger the code number, the larger the venting output. Below are the interval times in Normal mode as a function of the code numbers. Code number x Normal venting t 2 in minutes 12

13 sets the default value of x at 5. (= 15 minutes) Instructions for programming the code numbers can be found in the short instructions contained in appendices 1 and Programming the topping-up Because the water that is topped up must be de-aerated when it reaches the air-conditioning/heating installation, topping up is carried out in the same way as the de-aeration process, in each case as turbo venting. This means that the turbo mode values apply to both t 1 and t 2. Moreover: - the sum of all times (t 1) is the established top-up time. (Can be called up on the display as described in appendices 1 and 2); - the top-up process has priority over the venting process; - the minimum value p OFF p ON >= 0.1 bar Topping up installations with a diaphragm-expansion tank Programming the topping-up pressure In installations with diaphragm-pressure expansion tanks, the top-up command (p ON)/top-up command (p OFF) will be set in motion by the pressure sensor (5) (see page 7). The pre-set values for topping up depend on the pressure range within which the installation works. Type System working pressure range (bar) from to ENA 1 1,3 3,5 ENA 2 2,0 4,5 ENA 3 3,0 8,0 The pressures to be programmed for p ON/p OFF topping up must be within the boundaries outlined in the table above. The operating parameters may be changed within these pre-set boundaries only and must meet the conditions of reasonableness. Values which do not comply with the above will not be accepted by the appliance. Type Top-up pressure (bar) p ON p OFF ENA 1 1,5 2,0 ENA 2 3,0 4,0 ENA 3 5,0 6,0 The default values are: The programming of the pressures for p ON and p OFF topping up can be found in the short instructions in appendix 1. The topping up process continues until: - the pressure (p OFF) is reached or - the top-up time limit has been reached. The pre-programmed vent mode will then start up again. 13

14 6.3.2 Topping up installations with pressure stabilization by expansion tanks In this case, the top-up commands (p ON, p OFF) are sent to the control panel of the expansion tank (e.g. Flexcon MK/E or S). (ST 2) is not fitted. There must be something to control the expansion tank (standard with all Flexcon appliances!) at a point in the circuit before the control panel. The programming menu for topping-up pressure is not shown in the menu. (See appendix 2) The topping up process continues until: - the pressure-stabilization unit control panel issues the OFF command, or - the top-up time limit has been reached. The pre-programmed vent mode will then start up again Programming the top-up time The top-up time must be limited. This limitation is necessary to protect against water leakage from the installation in the event of damage to any part of the installation. The time limit can be set between 20 minutes and 240 minutes in steps of 10 minutes. Instructions for programming the top-up times can be found in the short instructions contained in appendices 1 and 2. s default setting is topping-up time of 20 minutes. 14

15 7. Malfunctions 7.1Troubleshooting list The following malfunctions may appear on the display: Error code Malfunction 1 - Pump malfunction. 2 - Solenoid valve (11) malfunction. 3 - Solenoid valve (15) malfunction. 4 - Float vent malfunction. 5 - Vacuum switch malfunction. 6 - Pressure reading malfunction. (Pressure is outside the permissible boundaries listed in point 6.3.1) Pressure reading/topping-up malfunction (during topping up, the pressure has dropped at least 0.4 bar). 7 - Topping-up time exceeded. 7.2 General - The green LEDs on the diagram of the front plate show correct operation; the red LEDs show malfunctions. - Operating malfunctions are shown in the Malfunctions display menu (see appendices 1 and 2) and are represented by flashing red LEDs on the diagram of the front plate on the diagram. Display: MALFUNCTION x, y, z, u, v - Malfunctions will remain in the system until manually reset. - Only those malfunctions of which the cause has been remedied can be manually reset. All other malfunctions will still be shown as such. - All malfunctions are also buffered as a signal to the malfunction port. - While remedying malfunctions (program status), the ENA will not carry out any operations. 7.3 Resetting after an error message Display: MALFUNCTION x, y, z, u, v hold down for 10 seconds. The display will show: ALL MALFUNCTIONS REMEDIED or MALFUNCTIONS REMAINING (All reports deleted) x, y... The display will continue to show Reststoring (malfunctions remaining) until the cause of each malfunction has been ascertained. They can then be remedied. Hold down the arrow key briefly to deactivate the malfunction. The display will now show the usual text: PRESSURE X;X BAR or PRESSURE X;X BAR VENTING TURBO x VENTING NORMAL x Instructions for remedying malfunctions can be found in the short instructions contained in appendices 1 and 2. 15

16 8. Other dangers The following pose a constant threat to the ENA venting/topping up appliance: - improper installation; - non-adherance to the parameters for use; - the use of the ENA for purposes other than those for which it was designed; - non-observance of the safety regulations for heat-generation installations. Installation of and maintenance on the ENA must be carried out when the ENA is completely disconnected from the mains, i.e. when the plug is out. It is not sufficient to flick the switch on the ENA control panel, if fitted, as such a switch merely cuts off the internal electronics from the mains. The vacuum tank must be pressure-free and be at ambient temperature. Note: The water in the vacuum tank may, under normal conditions, be at a temperature of 70 C. Therefore, when the installation is operative, the tank and the supply pipes (for the medium) may not be touched without proper protection. 9. Maintenance and recurring inspection The engineer who installs a HVAC installation must compile a use and maintenance log for the installation containing all data needed for safe and reliable operation of the installation. Maintenance must be carried out by qualified personnel only. Depending on the degree of pollutants in the medium, the filter in the supply pipe must be cleaned at regular intervals. This must happen at least once per year, for example prior to the start of the heating season. We also recommend you have an outward inspection of the ENA carried out at least once per year. This is primarily to check the integrity of pump seals, threaded connections, linkage and sensors. Seals or threaded connections may have to be re-fitted or tightened respectively. The control panel and pumps both bear the CE mark. 16

17 Appendix 1: Short manual for programming the ENA control panel in installations with a diaphragm-expansion tank Setting the vent time Turbo or Normal Setting the code number 10 s Pressure Venting x.x bar Turbo x To be set with or Pressure x.x bar Venting.... x To be set with or Pressure x.x bar Venting.... x Pressure Venting x.x bar Normal x "N" or "T" will flash Time used up Topping up time 018 min Setting the top-up time Programme time 10 s Programme time The number will flash In steps of 10 with or to be changed Topping up time 020 min Topping up time 020 min 10 s Top-up time ON set The number will flash Top-up time OFF set The number will flash top-up time ON 2,0 b* top-up time ON 2,0 b* top-up time ON 2,0 b* top-up time OFF 3,0 b* top-up time OFF 3,0 b* top-up time OFF 3,0 b* To be set with To be set with or or If there are no malfunctions in the system x y z If there are any malfunctions in the system Malfunction 10 s If there are still any malfunctions in the system Once all the malfunctions have been remedied Any remaining malfunctions can be reset only when all malfunctions have been remedied x y Remaining malfunctions all malfunctions remedied b* = bar 17

18 Appendix 2: Short user guide for programming the ENA control panel in installations with an expansion tank Setting the vent time Turbo or Normal Setting the code number 10 s Pressure Venting x.x bar Turbo x To be set with or Pressure x.x bar Venting.... x To be set with or Pressure x.x bar Venting.... x Pressure Venting x.x bar Normal x "N" or "T" will flash Time used up Topping up time 018 min Programme time 10 s Setting the top-up time Programme time In steps of 10 with to be or changed Topping up time 020 min Topping up time 020 min The number will flash If there are no malfunctions in the system x y z If there are any malfunctions in the system Malfunction 10 s If there are still any malfunctions in the system Once all the malfunctions have been remedied Any remaining malfunctions can be reset only when they have been remedied Restfehler (Remaining malfunctions) x y all malfunctions remedied 18

19 Appendix 3: Connections in the ENA control panel ENA control panel Alarm socket point-to-point circuit 7 e Pg (to be by the engineer) Pg 11 8 e Pg Vacuüm switch Pg 11 9 e Pg Top-up solenoid valve Pg e Pg Pressure sensor Pg 11 System solenoid valve 11 e Pg (power supply) Pg 11 6 e Pg 5 e Pg 4 e Pg 3 e Pg Pump 1 with Thermistor 1 Pg 13.5 ENA power connection Pg 11 Pump 2 with Thermistor 2 (ENA 3) Pg 11 RS 485 interface (to be by the engineer) Pg 11 2 e Pg 1 e Pg External control panel topping up (to be by the engineer) Pg 11 Float switch Pg 9 19

20 Appendix 4: Clamp connections in the ENA 1 - ENA 3 control panels ST 4 ST 3 Power supply electronics To mains power switch ST 2 Clamp connections V 2. Thermistor motor V 4. Thermistor motor V 6. Float switch V 8. Vacu m switch V (external top-up request) 10. External top-up request V pressure sensor 12. Pressure sensor signal 13. Earth connection 14. RS485 "A" (optional) 15. RS 485 "B" (optional) 16. Power 230 V/50 HZ, L 17. Power 230 V/50 Hz, N 18. N (pomp 1) 19. Pomp N (pump 2) 21. Pump N (installation solenoid valve) 23. Installation solenoid valve 24. N (top-up solenoid valve) 25. Top -up solenoid valve 26. Alarm, common, 27. Alarm, normally open (valve) 28. Alarm, normally closed (opener) Jumper function: ST 2 free: ST 2 fitted:. Note: the alarm relay is an inverted ", i.e. in the event of a malfunction, will be closed. external top-up control. internal top-up control. The setting of the jumpers is displayed when, on switching on the control panel, the [-] key is pressed. More importantly, this displays the installed software version. By pressing a key at random, you can start a key, LED and LCD test ( on the display). The control panel will then return to the normal operating status. Note: Before starting wiring work, disconnect the control panel from the mains power supply by removing the plug. The switch merely disconnects the internal electronics from the mains power. The plug must therefore be removed from the wall socket. 20