Installation, Operation & Maintenance Instructions

Transcription

1 Installation, Operation & Maintenance Instructions PressVal Micron Pressurisation Units Ltd Northgate Newark Notts NG24 1JN Tel: (01636) Fax: (01636) PressVal Micron Rev 1

2 Contents 1. Introduction 3 2. Description 4 3. Delivery & Nameplates 5 4. Technical Details Installation Details Pressure Settings Commissioning Operation and Fault Codes Maintenance Wiring diagrams Notes

3 1. Introduction These instructions have been written to give a brief description of the PressVal Micron pressurisation units their installation, commissioning, operation and subsequent maintenance. The installation of pressurisation units and their ancillary equipment is normally carried out by the Heating Engineer, and for the purpose of this manual he is regarded as the installer, and, as such, it is his responsibility to ensure that he has read and understood the contents of this manual before installing the boiler. It is essential that each unit has all services connected to it before commissioning. The installation should be in accordance with current I.E.E. Regulations, relevant British Standard and Codes of Practice, Building Regulations and Local Authority Bylaws. Engineers will normally commission the pressurisation unit and if the heating engineer is present at the time, he will be instructed on the day-to-day operation of the unit. If this is not possible, or additional training is required, this can be arranged through. The units pressure settings are recorded on the commissioning report and a copy of this will be issued for retention with this manual (see example). A note should be entered below by the person responsible for the plant, giving the pressurisation unit model, reference K number, WO number, Serial No. These numbers are indicated on the nameplate which is located on the front of the break tank, inside the cabinet. For completion by Plantroom Attendant Unit Model: Serial No: K No: WO No: Commissioning Date For technical, servicing or parts enquiries, telephone, fax or to quoting the model(s) & K number, as above

4 2. Description. Description Application PressVal pressurisation equipment is designed to provide automatic make-up and pressure for sealed heating, chiller, and condensor systems. General Details The PressVal Micron pressurisation unit is a microprocessor controlled unit. Single and twin pump options are available to work up to the following pressures: Pump Pump Maximum Model Type Pressure 125 Single Twin Single Twin Single Twin 3.0 Expansion vessels Standard expansion vessels with fixed diaphragm are available as follows: Vessel Vessel Maximum Volume Configuration Pressure litres Vertical 6 bar litres Vertical 10 bar Non standard expansion vessels with interchangeable diaphram, inspection cover and pressure gauge are available as follows: Vessel Vessel Maximum Volume Configuration Pressure litres Vertical 6 bar litres Vertical 10 bar litres Horizontal 6 bar litres Horizontal 10 bar Details of the expansion vessels are shown on pages 9 and 10 Equipment Configurations PressVal Micron equipment is supplied in the following configurations: FS Micron Pressurisation unit with free standing expansion vessels. 4 PressVal Micron SM Micron Pressurisation unit and expansion vessels all skid mounted PressVal Micron CH Micron Pressurisation unit and expansion vessels all fitted within a cabinet. PressVal Micron PressVal Micron Mini Micron Wall mounted pressurisation unit with separate expansion vessels for small systems. PressVal Micron Controller PressVal Micron Features All enclosed type unit with polyester powder coated finish in colours. No side access required to cabinet. Quick release removeable door and electrical access panel. WRC listed controls and fittings. Break tank filter. Type A air gap. Illuminated on/off switch. Combined lockshield / drain valves. Centrifugal pump on 125 & 225 units, Turbine pump on 180 & 280 units 1/50/ v supply Power supply 12v ac for all controls. Safe low voltage Relay switching 230v ac 8 amp Dual or single pump control Pump monitoring for no current or too much current draw. 4 Digit display with scrolling, to display status and alarm modes. Internal alarm with mute function. Hi/Lo water detection with alarm and auto reset. No volt free out Hi pressure alarm with volt free Lo pressure alarm with volt free Pump trip volt free x 2 Sensor fail volt free Logging for no of times each pumps has run, number of alarms and number of times power fail. Main setpoint with adjustable diff Hi and Lo alarm setpoints with manual reset. Max time run for pumps Alternates pumps each time its activated. Password entry Visual pressure reading. All volt free outputs can also be powered with a rating upto 8 amps for warning lamps or alarms. If 1 pumps fails the other will cut in displaying P1 fail P2 go activating the P1 trip relay. If P2 fails the unit locks out and goes into full alarm mode.

5 3. Delivery & Nameplates Delivery The pressurisation unit and its associated equipment are normally delivered by our own transport on a mutually agreed date. The unit can be offloaded by a crane lorry if specifically booked at the time of ordering, (this is normally an extra). The equipment is normally supplied on a pallet for offloading via a fork lift truck. It can be craned off using slings. On delivery, the installer should check all items against the delivery note and should then store them in a safe and dry place. The model type and size is detailed on the units nameplate. A copy of this is stuck to the packaging for easy reference. A typical nameplate is detailed right. From the model reference you can work out the specification of the unit: Nameplates Ltd. Northgate, Newark, Notts. NG24 1JN Tel: (01636) Fax: (01636) Model: PressVal FS Micron 425/ Serial No. HFS Contract No. K64000 Supply: 1ph / 50Hz / 230V WO No. WO Made in UK Model: PressVal FS Micron 425/ Product Range Configuration Type of Control Expansion vessel volume (litres) Expansion vessel gas charge (bar) Number of pumps Maximum Cold fill pressure (metres wg) Each expansion vessel will have its own data plate. An example of which is shown on the right. Ltd. Northgate, Newark, Notts. NG24 1JN Tel: (01636) Fax: (01636) Type: PressVal 425/1.0 Volume: 425 litres Gas charge: 1.0 bar Max working pressure: 6 bar Max temperature: 70 o C Standard: BS4814 Serial number: K64000 Date of supply: 02/04 Made in UK

6 4. Technical Details PressVal FS Micron Models PressVal FS Micron 35 PressVal FS Micron 50 PressVal FS Micron 80 PressVal FS Micron 110 PressVal FS Micron 140 PressVal Micron D PressVal FS Micron 200 C PressVal FS Micron 300 PressVal FS Micron 425 PressVal FS Micron 600 PressVal FS Micron 800 PressVal FS Micron 1000 A Front View B E F Side View Models PressVal FS Micron 2x425 PressVal FS Micron 2x600 PressVal Micron D PressVal FS Micron 2x800 C PressVal FS Micron 2x1000 A Front View B E F Side View PressVal FS Micron Type x425 2x600 2x800 2x1000 Dimensions: A B C D E F Dry Weight: (125 single pump unit) (225 twin pump unit) (180 single pump unit) (280 twin pump unit) (Expansion vessel - 6 bar) Service connections (rear view) Connections (All units) 1. System connection 1/2 bsp M 2. Expansion vessel connection 1/2 bsp F 3. Cold mains connection 1/2 bsp M 4. Overflow 22mm 5. Cable entry Clearance / Access (All units) Rear clearance: 100mm is required at the back of the pressurisation unit to pipe up. Front clearance: 600mm is required in front of the pressurisation unit for access to the unit. Side clearance: No side clearance required Top clearance: 400mm is required above the pressurisation unit for access to the electrical panel.

7 4. Technical Details PressVal SM Micron Models PressVal Micron PressVal SM Micron 80 PressVal SM Micron 110 C PressVal SM Micron 140 PressVal SM Micron 200 PressVal SM Micron 300 PressVal Micron D B E A F Models PressVal SM Micron 25 PressVal SM Micron 50 PressVal SM Micron 425 PressVal SM Micron 600 PressVal SM Micron 800 PressVal SM Micron 1000 A B E F C Models PressVal SM Micron 2x425 D PressVal SM Micron 2x600 PressVal SM Micron 2x800 PressVal Micron C PressVal SM Micron 2x1000 B E A F PressVal SM Micron Type x425 2x600 2x800 2x1000 Dimensions: A B C D E F Dry Weight: (125 single pump unit) (225 twin pump unit) (180 single pump unit) (280 twin pump unit) Service connections (rear view) Connections (All units) 1. System connection 1/2 bsp M 2. Expansion vessel connection 1/2 bsp F 3. Cold mains connection 1/2 bsp M 4. Overflow 22mm 5. Cable entry Clearance / Access (All units) Rear clearance: 100mm is required at the back of the pressurisation unit to pipe up. Front clearance: 600mm is required in front of the pressurisation unit for access to the unit. Side clearance: No side clearance required Top clearance: 400mm is required above the pressurisation unit for access to the electrical panel.

8 4. Technical Details PressVal CH Micron PressVal Micron PressVal Micron Connections (All units) 1. System connection 1/2 bsp M 2. Cold mains connection 1/2 bsp M 3. Overflow 22mm A B C 1 4. Electrical terminal box Clearance / Access (All units) Front clearance: 600mm is required in front of the pressurisation unit for access to the unit. Rear clearance: No rear clearance required** Side clearance: No side clearance required** Top clearance: No top clearance required** ** Note clearance for pipe work and electrical cables will have to allowed for. Entry into the unit is left for the contractor to decide. PressVal CH Micron Type Dimensions: A B C Dry Weight: (125 single pump unit) (225 twin pump unit) (180 single pump unit) (280 twin pump unit) PressVal Mini Micron 4 Connections (All units) 1. System connection 1/4 bsp M 2. Cold mains connection 1/2 bsp M Overflow 22mm 4. Cable entry Clearance / Access (All units) Front clearance: 600mm is required in front of the pressurisation unit for access to the unit. Rear clearance: No rear clearance required Side clearance: 100mm left side clearance required to pipe up Top clearance: 300mm top clearance required for electrics Only suitable for use with expansion vessels up to 300 litres Electrical details: 1ph / 50Hz / 230V 48 W motor, Fuse 3A Dry Weight: 6kg 8

9 4. Technical Details PressVal standard expansion ves- D C D H D C H C H PressVal 2 to 25 Standard Range PressVal 35 to 80 PressVal 110 to 1000 PressVal Model Volume (litres) Max pressure (bar) Max temperature ( o C) 70* 70* 70* 70* 70* 70* 70* 70* 70* 70* 70* 70* 70* 70* 70* 70* 70* System Conn (C) (bsp) 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/ Dimensions: Diameter (D) (mm) Height (H) (mm) Dry weight (kg) High Pressure Range PressVal Model Volume (litres) Max pressure (bar) Max temperature ( o C) 70* 70* 70* 70* 70* 70* 70* 70* System Conn (C) (bsp) Dimensions: Diameter (D) (mm) Height (H) (mm) Dry weight (kg) Specification Steel Construction: To BS 4814:1990 Sizes up to 80 litre: Deep Drawn with separate clench joint as defined in BS 4814:1990 Sizes 110 to 1000: All welded Diaphragm: Flexible rubber with stress free rolling action * Max temp: Temperature of fluid in contact with diaphragm. The use of these vessels in systems operating at higher temperatures can be achived with the use of an intermediate vessel. Sizes up to 25 litres: Mounting brackets available on request. Recommended piping for expansion vessels. AAV Drain Cock Lock Shield Valve Antigravity loop

10 4. Technical Details PressVal non standard expansion vessels OD PressVal VHH (vertical) and HHH (horizontal) expansion vessels are complete with interchangeable diaphragm, inspection cover and pressure gauge. PressVal VHH Vessel size (litres) System connection (C) 80 DN DN DN100 H H OD PressVal HHH C C L Non standard vertical expansion vessels PressVal Model VHH Volume (litres) Max pressure (bar) Max temperature ( o C) 70* 70* 70* 70* 70* 70* 70* 70* 70* 70* 70* 70* 70* Diameter (D) (mm) Height (H) (mm) Dry weight (kg) Non standard vertical expansion vessels PressVal Model VHH Volume (litres) Max pressure (bar) Max temperature ( o C) 70* 70* 70* 70* 70* 70* 70* 70* 70* 70* 70* 70* 70* Diameter (D) (mm) Height (H) (mm) Dry weight (kg) Non standard horizontal expansion vessels PressVal Model HHH Volume (litres) Max pressure (bar) Max temperature ( o C) 70* 70* 70* 70* 70* 70* 70* 70* 70* 70* 70* 70* 70* 70* Diameter (D) (mm) Height (H) (mm) Length (L) (mm) Dry weight (kg) Non standard horizontal expansion vessels PressVal Model HHH Volume (litres) Max pressure (bar) Max temperature ( o C) 70* 70* 70* 70* 70* 70* 70* 70* 70* 70* 70* 70* 70* Diameter (D) (mm) Height (H) (mm) Length (L) (mm) Dry weight (kg)

11 4. Technical Details PressVal intermediate vessels D H Please Note that intermediate vessels are only required on systems operating above 90 o C boiler flow temperature. Small systems may have sufficient volume in the pipe work to the expansion vessel, on these occasions an intermediate vessel may not be required. For confirmation please call Technical. C PressVal V Intermediate vessels PressVal Model V Volume (litres) Max pressure (bar) Max temperature ( o C) Diameter (D) (mm) Height (H) (mm) Connection (C) (bsp/pn6/16) 1.1/2 1.1/ Dry weight (kg) PressVal Model V Volume (litres) Max pressure (bar) Max temperature ( o C) Diameter (D) (mm) Height (H) (mm) Connection (C) (bsp/pn16) 1.1/2 1.1/ Dry weight (kg) Description PressVal Intermediate Vessels provide effective temperature reduction of expanded water in systems operating above 90 C. Installed between the system return and the expansion vessel(s), the PressVal Intermediate Vessel prevents high temperature expansion water coming into contact with the expansion vessel diaphragm. Please note that to aid heat dissipation, the intermediate vessel, together with the pipework to and from it, should not be insulated. For HTHW systems, use a Nitro pressurisation unit, details on request. Key Features Vessels up to 7 Bar g and 120 C are constructed to BS 853. Vessels above 7 Bar g and/or 120 C are constructed to PD5500:2000. Tall slim design encourages thermal stratification with the inlet at the top and the outlet at the bottom to prevent natural circulation. Test certificates available. System connections shown in table are general and may change to suit installation. Other vessels are also available, i.e. storage and chilled water buffer vessels. Other vessels and volumes can be made to suit specific needs. Sizing Intermediate vessel volume (litres) = % of expansion volume at highest system temperature (see table below) Flow temperature % of expansion o C volume

12 5. Installation Details Regulations and Standards covering Sealed System Equipment: HSE-PM5 Guidance Document. Water Bye-Laws. HSE Pressure Systems and Transportable Gas Container Regulations. (Expansion vessels do not currently require any routine inspection or checking under the written scheme of examination). Code of Practice: Refer to B.S Pressure equipment directive 12

13 6. Pressure Settings Before you can commission the Press- Val Micron pressurisation unit you will need to know the following pressure settings: Cold fill pressure. High cut out pressure. Low cut out pressure. Cold fill pressure. The cold fill pressure is the initial pressure that the pump needs to generate to pressurize a system at its highest point. On LTHW systems this should be set at 0.3 bar above the static height pressure, this extra pressure will allow any air to be expelled from the highest point of the system. For example a system with a static height of 10 metres has an approximate static pressure of 1.0 bar. So the cold fill pressure should be set at 1.30 bar. On MTHW systems operating above 100 o C it is necessary to ensure that the water at the highest point in the system does not flash off to steam. Therefore it is necessary to add an anti-flash margin pressure on to the static height pressure. The table right shows the antiflash pressure at differing flow temperatures. For example on a system with a static height of 10 metres and operating at 120 o C flow, the cold fill pressure would be 3.30 bar High pressure cut out. The high pressure cut out setting is the maximum pressure that the system will run at before it locks out. This is a safety feature to prevent over pressurizing a system. The high pressure cut out should be set 0.3 bar below the safety valve setting. Low pressure cut out. The low pressure cut out setting is the minimum pressure that the system will run at before it locks out. This is a safety feature to prevent the system from running without sufficient water in it. The low pressure cut out should be set 0.3 bar below the cold fill pressure. Operating pressure. On a pressurized system the pressure will vary between the high and low pressure settings. This is dependent on the mean system temperature. Maximum operating pressure. The maximum operating pressure of a system is the lowest maximum operating pressure that any component in the system is suitable for. This may be the boiler or a vessel or an indirect calorifier etc. Final (hot) operating pressure. The final (hot) operating pressure depends on how the expansion vessel(s) have been sized. The smaller the expansion vessel volume is the greater the final working pressure will be. On systems where the cold fill pressure is close to the maximum operating pressure you can expect to see a large expansion vessel volume in relation to the system volume. To check the size of the expansion vessels you can use the following calculation: Expansion coefficient Vessel Size VE Expansion vessel size System water content x Coefficient of expansion = Expansion vessel efficiency Expansion vessel efficiency Final pressure - Cold fill pressure = (bar abs) Final pressure Coefficient of expansion Please note that for systems containing antifreeze the coefficient of expansion will increase. Details of the different expansion coefficients can be found in BS7074. Ant-flash Margin at flow Temp o C Bar

14 7. Commissioning Technical details Power Supply: AC 12v +/-10% 50/60 Hz Pressure Sensor: simulated with a Trimmer/ DC12V supply Range of Measurements: Bar Alarm Outputs: All normally open, AC 250v 8A Boiler Interlock: Normally Closed, AC 250v 8A Audible Alarm: Internal Buzzer Suitable for plantroom temps: 0-50 o C Suitable for plantroom humidity: 30-85% without condensation Control Unit Power to the unit is controlled via a on/off switch located next to the controller. This is not an integral part. The unit becomes live once power is supplied. The unit will not register until the system is full of water and pressure is sensed at the transducer. It will give the reading below and sound an audible alarm. This prevents the unit being used to fill the system. Once the system is filled the unit can be programmed Key Key Function 1 Displays pressure value/ Parameter memorization 2 Buzzer mute / Instrument reset / Pump 1 override 3 Parameter value increase by 0.1 bar 4 Parameter valve decrease by 0.1 bar Gaining access to the programme and stored information. To enter the programme mode and to set the unit up a password needs to be entered. The password is common on all units Press + & - keys. Simultaneously and hold for 2 seconds. Then release. Then enter the code shown on right using the + & - and set keys again. The first reading is the number of times pump 1 has run. This scrolls on the screen. It can register up to 999 starts 14

15 7. Commissioning By pressing the Set Key you will move to the next reading. This is Pump 2. As the unit autocycles this will be different to pump 1. It will be within 1 digit unless pump 1 has been operated manually. The unit will always start on pump 1 after power failure as well. Pump 2 cannot be operated manually By pressing the Set Key you will move to the next reading. This is the number of alarms registered. This can register up to 9999 alarms By pressing the Set Key you will move to the next reading. This is the number of power interruptions registered. This can register up to 9999 interruptions.

16 7. Commissioning By pressing the Set Key you will move to the first setting: Fill pressure. It is prefixed with letter P By using the +/- key the correct pressure can be entered To accept the setting and move to the next setting press the set key. At this point if the p1 Override is pressed the pump will run By pressing the Set Key you will move to the next setting: High pressure alarm It is prefixed with letter H By using the +/- key the correct pressure can be entered To accept the setting and move to the next setting press the set key. By pressing the Set Key you will move to the next setting: Low pressure alarm It is prefixed with letter L By using the +/- key the correct pressure can be entered To accept the setting and move to the next setting press the set key By pressing the Set Key you will move to the next setting: Pump on/off differential It is prefixed with letter D By using the +/- key the correct differential can be entered It can be altered any amount as long as it does not conflict with any other setting To accept the setting and move to the next setting press the set key 16

17 7. Commissioning By pressing the Set Key you will move to the next setting: Max Pump run time It is prefixed with the letters DELP By using the +/- key the correct value can be entered in 10 minute increments It can be set between mins. Setting at 0 disables the function. RECOMMEND SETTING 10 MINUTES To accept the setting press set. The unit will then scroll SYS GO and start to operate

18 8. Operation & Fault Codes Operation To display the actual working pressure press the Actual pressure button. The pressure will be shown in bar g. To override pump 1 press P.1 OVERRIDE button. Pump 1 should run. Fault Codes L.P. Fault occurs if a leak is too great for the pump to keep up the unit will go into Low pressure lock out. If wired back to the boilers / BMS system this will shut down the boiler / chiller / condenser plant. Check the pressure settings and check for leaks within the system. H.P. Fault occurs if the pressure in the system rises above the high pressure setting. Check the pressure settings and system temperature. Check expansion vessel sizing. Ensure diaphragm is not leaking. Check expasion vessel gas charge, you will need to isolate and drain the vessel down before checking the pressure. L.H.2.O. Low water in break tank. Check incoming water mains. Check ball / float valve. 18

19 8. Operation & Fault Codes Fault Codes H.H2O. High water in break tank. Check ball / float valve. P.1.Fail Fault occurs if pump number one fails. Check the pump. P.2.Fail Fault occurs if pump number one fails. Check the pump. DEL.P1 or P2. Max pump run time has elapsed for either pump 1 or 2. Check system for major leaks. ERR.1 Full fault condition. Check system pressure. Check sensors. Cjeck pumps. Check water supply. Check electrical supply. To reset switch unit of and on.

20 9. General Microprocessor Information FUNCTIONS OF THE KEYS SET KEY Allows to store data in the EEPROM during parameter programming, to pass on to next parameter for programming, and to exit from the instrument SETUP mode BUZZER MUTE / RESET / P 1. OVERRIDE KEY Press and release during an alarm condition to stop buzzer Press for about two seconds to reset instrument (not in the parameter programming mode) Press during parameter programming to activate the PUMP 1 override mode (message: P1 GO) Note: this can only be done with parameters P., H., L., and d. SETUP + KEY No function during normal controller activity Increases the parameter value by 0,1 bar during parameter programming By parameter del.p. increases the parameter value in 10 minute-steps to a max of 990 minutes SETUP KEY No function during normal controller activity Decreases the parameter value by 0,1 bar during parameter programming By parameter del.p. decreases the parameter value in 10 minute-steps to a minimum of 00 minutes (disables the parameter) SETUP + and SETUP KEYS pressed simultaneously Depress simultaneously, and then release to enter the parameter configuration menu. In this phase any alarms are deactivated and all relay contacts are open. Exiting the parameter configuration phase with the SET key also resets the instrument. PARAMETER CONFIGURATION Code Description Limits Resolution Description P. Mid Set Point 0.0 (H.-0.1) 0.1 bar This is the ideal pressure that must be reached after an intervention of pump 1 or 2. H. High pressure (P.+0.1) bar This is the maximum limit pressure value of the water in the system. L. Low pressure 0.0 (P.-0.1) 0.1 bar This is the minimum limit pressure value of the water in the system. d. Differential 0.0 L. 0.1 bar This is the value which, when subtracted from the Mid Set Point P., fixes the intervention threshold limit value of the controller. del.p. Max pump activity time min 10 minute-step increases to max 990 minutes 20

21 9. General Microprocessor Information TROUBLE SHOOTING ALARM MESSAGES (Note: the alarm messages listed below are the single alarms that can appear together with other alarms and in that case are then the sum of each alarm condition) Alarm Messages Cause Controller Intervention H. H2O Float intervention at MAX FLOAT LEVEL Opens the relay of PUMP 1 or PUMP 2. L. H2O Float intervention at MIN FLOAT LEVEL Opens the relay of PUMP 1 or PUMP 2. H.P. Exceeding the upper plant water pressure limit Activates the acoustic signal, closes the High PRESSURE relay, opens the BOILER relay. L.P. Exceeding the lower plant water pressure limit Activates the acoustic signal, closes the LOW PRESSURE relay, opens the BOILER relay. P.1 FAIL Pump 1 failure Closes the PUMP 1 FAILURE relay (however, the plant is operating correctly). P.2 FAIL Pump 2 failure Closes the PUMP 2 FAILURE relay (however, the plant is operating correctly). P.1 FAIL P.2 FAIL Both pumps are defect Activates the acoustic signal, closes the PUMP 1 FAILURE relay, closes the PUMP 2 FAILURE relay, opens the relay of PUMP 1 or PUMP 2, opens the BOILER relay. del. P1 del.p. parameter time setting reached Activates the acoustic signal, opens the relay of PUMP 1, opens the BOILER relay. del. P2 del.p. parameter time setting reached Activates the acoustic signal, Besides the alarm signals, the controller can give six warning messages as indicated below. WARNING MESSAGES Warning Messages SYS. GO Meaning Normal plant operation, closes the boiler relay P.1 GO PUMP 1 running, closes the boiler relay P.2 GO PUMP 2 running, closes the boiler relay Err. Err. 1 Cod. Wrong password Sensor failure, closes the sensor failure relay Appears for 1 second before password insertion

22 9. General Microprocessor Information Procedures or decrease this value, press the + or pushbutton; once the correct value has been reached, press SET to confirm this value and this value, press the + or pushbutton; once the correct value has been reached, press SET to confirm this value and to pass on 10. L. _._ (the formerly selected two numbers) will be displayed that refer to the Low Pressure parameter. To increase or decrease this value, press the + or pushbutton; once the correct value has been reached, press SET to confirm this value and to pass on 11. d. _._ (the formerly selected two numbers) will be displayed that refer to the Differential parameter. To increase or decrease this value, press the + or pushbutton; once the correct value has been reached, press SET to confirm this value and to pass on to 12. del.p. will be displayed for 1 second and the max time (in 10 minute-step increases to max 990 minutes) of pump activity can = password for access to the parameter menu. 2. Password input procedure: a) simultaneously depress + and pushbuttons briefly; b) on release the Cod. will be displayed; c) four zeros ( 0000 ) will be displayed and the first one in the blinking mode; d) use the + or pushbutton to select the correct value; e) push the SET button to confirm the value; f) now the second 0 will blink; g) proceed like in d), e); h) now the third 0 will blink; etc, etc. 3. If the password is wrong, Err. will be displayed. 4. If the password is correct, P1 will be displayed for 1 second, and then the number of PUMP 1 start-up times. (To reset this number to 0000, press the RESET pushbutton for 1 second). 5. By pressing SET, P2 will be displayed for 1 second and then the number of PUMP 2 start-up times. (To reset this number to 0000, press the RESET button for 1 second). 6. By pressing SET, ALL. will be displayed for 1 second and then the number of times the controller had an alarm. (To reset this number to 0000, press the RESET button for 1 second). 7. By pressing SET, L.PO. will be displayed for 1 second and then the number of power black outs. (To reset this number to 0000, press the RESET button for 1 second). 8. By pressing SET, P. _._ (the formerly selected two numbers) will be displayed that refer to the Mid Set Point parameter. To increase to pass on to the successive parameter. 9. H. _._ (the formerly selected two numbers) will be displayed that refer to the High Pressure parameter. To increase or decrease to the successive parameter. to the successive parameter. the successive parameter. be set by pressing the + or pushbutton; once the correct value has been reached, press SET to confirm. When setting the value to 00 the parameter is disabled. Jumper Select the type of pumps to be controlled by either removing or inserting the jumper, i.e., - REMOVE the jumper when using the big pumps (Model: 12HS MkIII 230V a.c. - current limit values: Min 700 ma, Max not considered) - INSERT the jumper when using the small pumps (Model: EP7 - current limit values: Min 200 ma, Max 500 ma) This selection can be made by either - shutting down the power supply to the controller and then removing or inserting the jumper, or - by removing or inserting the jumper when the controller is turned on and then pressing the RESET pushbutton. Default parameter values (by EEPROM data loss) P.1 = 0000, P.2 = 0000, ALL. = 0000, L.PO. = 0000, P. = 1.0, H. = 1.5, L. = 0.5, d. = 0.2, del.p. = Maintenance Maintenance period PressVal pressurisation equipment should be periodically checked once per heating season. Maintenance checks The following checks should be carried out: 1) Drain down expansion vessels and test gas charge in vessel. This should be the same as detailed on the expansion vessel dataplate. Over time the gas charge in the vessel will permiate through the diagragm. If the gas charge is less than the stated pressure pump air back in the vessel using a compressor. 2) Check ball valve operates 3) Check pumps operate. This can be done by isolating the unit on its lock shield valve and opening the drain valve. 4) Check number of times the pumps have operated by following the comssioning procedure. 5) Check settings are the same as on the commissioning report. 6) Check level sensors operate by draining down the break tank. 22

23 11. Wiring Diagram (Single Pump Units) White Brown Yellow

24 11. Wiring Diagram (Twin Pump Units) White Brown Yellow 24

25 12. Notes

26 12. Notes 26

27 12. Notes

28 England Ltd Northgate Newark Notts NG24 1JN Tel: (01636) Fax: (01636) website: PressVal Micron Rev 1