15/01/13 T.P V1.0

15/01/13 T.P V1.0

15/01/13 T.P V1.0

15/01/13 T.P V1.0

15/01/13 T.P V1.0

Operating and Maintenance Instructions FLOWSTOW Passive Rainwater Harvesting

Doc Ref. PX-FS-12-2012-V2

15/01/13 T.P V1.0

Contents 1. FLOWSTOW System Overview 2. Installation Guidance Notes 3. Principle of Operation 4. FLOWSTOW Tank Component Identification 5. FLOWSTOW Filtered Rain Water Outlet 6. FLOWSTOW Multiflow 7. Maintenance to FLOWSTOW Rain Water Storage Tank 8. FLOWSTOW Control panel 9. Recommended spares/Maintenance Agreement

15/01/13 T.P V1.0

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Care is required to avoid any impact Whatsoever when handling the tanks at temperatures at 5C and Below, if in doubt contact Pipex px

Photo 2

Slots within the tank are provided to Assist with handling of the tanks Into position

Photo 3

Unloading

Incoming shipments will be inspected by the customer to ensure no damage has occurred during transit. It is the responsibility of the customer to report any damages as a result of transit prior to unloading the tanks. The tanks are removed from the delivery vehicle with a Fork-Lift by suitable qualified personnel, care is required when positioning for forks beneath the tanks ensuring the forks are flat to avoid the tanks slipping. (Photo 2) Alternatively strops can be used and placed beneath the tanks taking care to avoid pipe connections. Care must be taken during the unloading operation that the tanks are not dropped or that impact with other goods does not occur. Slots are provided to assist with handling (Photo 3)

Storage The customer is responsible for storing the tanks within a safe area, long periods of exposure to direct sunlight should be avoided. If the tanks are going to stored for long periods exposed to direct sunlight a tarpaulin cover will be required.

Optional Support Frames If ordered optional support frames will be pre-assembled to the tanks. It is recommended that the tanks remain stored flat until positioned and secured to the toilet area wall.

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Photo 4 Valve Assembly screwed to tank connection

Photo 5 Rubber pre-installed to accept WC Flush Pipe

Photo 6 Rubber pre-installed to accept WC Flush Pipe

Photo 7 Control Panel Sensor Hose Photo 8 Connecting Sensor Hose to the Compression fitting on the tank

Connecting the Flush Valve Assembly The actuated valves flush valve assembly will be packed separate. A tank connector with union end is provided on the bottom of the tank to accept the valve assembly, the union nut is screwed hand tight (See Photo 4) A rubber insert is provided on the flush valve assembly to accept the WC flush pipe (See Photo 5 & 6)

Connecting the sensor hose to the tank

The FLOWSTOW Control Panel for each tank is supplied with 3.5m of 4mm I.D. clear PVC sensor hose connected to the pressure sensor located within the control panel. DO NOT REMOVE THE SENSOR HOSE FROM THE PANEL. (Photo 7). The tank is provided with a compression fitting to accept the PVC sensor hose (photo 8) Care must be taken when connecting the sensor hose to the tank to ensure it is tightened to form an air tight seal.

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FLOWSTOWFLOWSTOW

3.Principle of Operation

The filtered rain water enters the tank through the rain water inlet positioned on top of the tank. In the event of the tank reaching maximum capacity an overflow within the tank will convey the excess

rain water to drain. The FLOWSTOW flushing is operated by pushing the half or full flush button which will open the actuated

valve connected to the WC flushing pipe. The flushing volumes can be adjusted by Pipex px commissioning engineer but are preset to meet BREEAM requirements of 4.5 litre for full flush and 3.0 litre for half flush.

The buttons are numbered 1 for half flush and 2 for full flush. A pressure switch located within the control panel determines the opening time of the actuated flushing

valve in relation to the static head of rain water within the tank. In the event no rain the tanks will be filled by a 15mm mains water top up solenoid valve which discharges

into the mains water inlet tundish located on top of each tank. The mains water top up volume is set to provide 3No flushes and will operate as a traditional WC cistern during periods with no rain.

A drain valve is located on the bottom of the tank connecting into the overflow outlet to facilitate draining down of the tank.

A bolted inspection cover provides access into the tank for cleaning. The operation of the system is via the FLOWSTOW control panel, refer to section 7 for Control Panel

Instructions. 4. FLOWSTOW Tank Component Identification

Key. 1.FLOWSTOW Tank (Twin indicated, Single/Triple available. 2.Removable Access Cover for cleaning the inside of the tank 3. Mains water inlet tundish with air gap and spill over 4. 63(50NB) Rain Water Inlet 5. 63(50NB) Overflow 6. 40(32NB) Welded Tank Connector 7. 20(15NB) Pressure Sensor Dip Pipe 8. Drain Sump with 32(25NB) Tank Drain 9. 40(32NB) turn Isolation Valve 10. 40(32NB) 24v DC Actuated Flush Valve 11. 32(25NB) turn Drain Isolation Valve 12. Half and Full Flush push buttons with stainless face plate 13. Rubber push fit insert to accept WC Flush Pipe 14. Mains water top up level 15.Mains water top up Solenoid Valve 24v DC 16. Optional Support Frame supplied assembled to tank. 17. FLOWSTOW Control Panel 200L x 145H x 55 Deep 18. 6mm(4NB) Clear PVC Pressure Sensor Hose 19. Optional UV lamp Connection (UV not normally required) 20. Handle Slots to assist with positioning 21. Water Meter as Kent V100 Pulse Meter (Not supplied) 22. Condense Drip Channel with connection to overflow 23. Vent Hole above water line level

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5. FLOWSTOW Filtered Rain Water Outlet

1. Leaf guard with two retaining lugs for locating into main body item 5. 2. Polystyrene frost cap. 3. Cylinder Filter closed top open bottom 4. 500 micron mesh filter basket with glass medium filter/flow restrictor to 0.15l/s 5. Rain water outlet. Spigot outlet 110mm 6. M6 x 16mm CSK Screws for single ply membrane 7. M6 x 45mm CSK Screws for asphalt finish Cleaning the outlet In order to clean out the trap and medium filter it is recommended to have a spare filter bag complete with the glass media (4) If leaf guard is blocked and rainwater has formed a pond around the leaf guard (1) first clear debris away from leaf guard and dispose into a refuse bag. Surface water should now flow through leaf guard (1) and into outlet (5) If the rain water will not flow away then it is likely that the filter media bag needs to be cleaned (4). Using a twisting action remove the leaf (1) guard away from the rain water outlet (5). Lift out frost cap (2) and remove mesh filter (3) Have your spare filter media bag (4) close to hand then lift out the filter media bag to be cleaned and immediately replace it with your spare filter bag. Replace filter mesh (3)and frost cap (2) then fix leaf guard (1) any surface water will now drain through the newly installed filter media. Once surface water has cleared it is recommended that the procedure is repeated but this time remove the trap (4) and wipe clean and wash out. The filter media bag that was removed is now washed through under a tap and kept as the spare. The number of times the outlet needs to be cleaned is dependent on the surrounding environment, if trees are close by then the roof will be subject to leaf fall during the autumn months. As a guide clean once in beginning October then again in Jan/Feb then again once in the summer months, it will be up to the end user to determine the best maintenance schedule to the rain water outlet to suit the surrounding environmental conditions.

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6. FLOWSTOW Multiflow Where required an optional FLOWSTOW Multiflow rain water outlet can be installed to divert the rainwater to several tanks. The installer must ensure that the Multiflow is installed with top level to ensure even distribution of the rainwater.

1. FLOWSTOW Filtered rain water outlet 2. FLOWSTOW Multiflow outlet 3. 110mm push fit o ring socket 4. Predrilled holes to accept secondary support fixings. Secondary fixings not supplied by Pipex px 5. 63(50NB) outlet connections 6. 15mm drain valve 7. Removable access cap for cleaning. Installation The Multiflow outlet is supplied with an o ring socket (3) for push fitting directly onto the filtered rain water outlet (1). Silicone grease is applied to the o rings to assist with sliding on to the spigot outlet. Predrilled hole are provided (4) to allow for secondary support fixings. To ensure even distribution of the rain water through the Multiflow outlet the top of the outlet (4) must be level, it is recommended this is checked with a digital spirit level. Cleaning the outlet It is recommended that cleaning the outlet is completed when the outlet is not receiving rain water from the roof. The Multiflow outlet is drained using the drain valve (6), position a bucket beneath the drain or alternatively connect a hose to the drain valve. To inspect inside the Multiflow either remove the trap within the rain water outlet as previously described or remove the access cap (7) The filter within the roof rainwater outlet will prevent debris entering the Multiflow but it is recommended that the Multiflow is cleaned twice a year.

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7. Maintenance to FLOWSTOW Rain Water Storage Tank 7.1 Removing the bolted Access Cover Access for cleaning and inspection into the tanks is via the bolted covers positioned on the front of the tanks. The nuts are M16 stainless steel. If the filter medium within the rainwater outlet is maintained as previously mentioned in section 4 then debris entering the tanks will be kept to a minimum. It is recommended that cleaning of the tanks is completed once a year, the internal wall of the tank can be hosed out with clean water and wiped with a cloth. A 3mm EDPM gasket seals the access cover to the tank, the gasket will need to be replaced if signs of wear are evident or as a guide every third time of removal. When removing and replacing the cover care needs to be taken not to cross thread the stainless steel studs, use a copper anti-seize thread lubricant to the stainless steel threads to prevent thread locking. The access cover torque setting is 60 Nm or 44 lb/ft. If the tank is fitted with optional viewing ports the torque settings will be the same. The inside of the FLOWSTOW tank is wiped clean with a damp cloth avoid using solvents or abrasive pads. The tank can be pressure jet cleaned. 7.2 Actuated Flushing Valves In the unlikely event that there is a fault with the actuated flushing valves please contact Pipex px for assistance. The mechanics of the valve are protected with a tamper proof seal is this is removed the warranty of the actuated valve is void. (See photo 9)

1. M16 stainless steel encapsulated stud 2. 3mm EDPM Gasket 3. Polypropylene access cover 4. Stainless steel flat washer 5. M16 stainless steel nut

Photo 9 indicating tamper proof red seal

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8. FLOWSTOW Control panel

Connections Diagram Please connect all power, valves, buttons, sensors and commuction devices according to the diagram below. Failure to follow these instructions could result in damage to the device and/or other connected devices.

External connections: The control panel is powered via the IEC plug connector on the bottom right hand side of the panel. IEC plug is not supplied by Pipex px The pressure sensor port is found on the left hand side of the controller box and should be connected via a silicone hose to the water tank for water level sensing. The following I/O connections are accessible through 6 circular pin connectors:

1. 2 Pin connector: Optional UV lamp connection, 240V. 2. 3 pin connector: RS485 serial connection for BMS readout. 3. 4 pin connector: Water meter pulse counter input and top-up solenoid valve connection. 4. 5 pin connectors (3pcs): full flush and half flush button input + WC valve connection.

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*Please solder the wires of all accessories (valves, buttons etc) to the supplied circular plugs as shown on the diagrams below. The plugs are directional and will only mate with matching sockets on the panel.

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8.1 FLOWSTOW user interface

The front face of the control box shows an 84x48 pixel LCD display with three membrane pushbuttons for navigation and data input on the left hand side of the display. Home screen: By default the control panel shows the total amount of water saved. Pressing the middle selection button displays further menu options.

To see the status and running totals of the system select Status. To setup, commission or change parameters select Setup. To return to the home screen select Back.

8.2 Setup Procedure

Note: The control panel is factory preset to provide a 4.5 litre full flush and a 3 litre half flush. The preset settings do not need to be adjusted and if further commissioning is required it is recommended that Pipex px is contacted.

After ensuring all external sensors, actuators and power are satisfactory connected to the panel, the systems software has to be configured through a simple setup routine. Please go to the Setup->Commissioning menu.

Set Up / Commissioning 1. Make sure the water tank is empty and the pressure sensing hose is connected to port on

the panel. The current water level is indicated by the WaterH menu item and is updated in real-time.

2. Press enter Set min to calibrate the system, setting its 0 water level. 3. Move one menu item down; Press the enter button and hold to activate the Mains top up

valve override until sufficient water is in the tank for flushing. 4. Try flushing by pushing one of the externally connected flush button

Note: Minimum offset value can be reset by clicking Set min again.

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8.3 FLOWSTOW Control Panel

Status display: Select Since January to display the logged running totals of the system since the beginning of the year. Keep pressing the down button to activate the second screen of this menu. To go back to the Main menu press Back at the end of the list, to view the Status for the system since commissioning, select Since startup.

Set up menu: Allows for commisioning routines, maintanance and setting of parameters to match each individual design or implementation of the system. To manipulate a numerical value, please select it by pressing enter after which you can press the up or down buttons to increase or decrease a value. After completing editting the value, press the enter button again to deactivate edit mode. Now press up or down to select the next value.

Commissioning; allows to see the current pressure sensor reading and set a zero/minimum for when the tank is empty. After completing this step the user moves one meny item down to control the Mains override feature. By pressing and holding the enter button the mains top-up valve will open and fill the tank until the user sees no further increase of the value shown on the line below. (hearing the water overflow is the second clue). Offset shows the offset value of the pressure sensor, as specified by the manufacturer. Mains Top Up shows settings of the mains. Mains Top Up TriggeropenstheMainssolenoidvalve,iftheheightofwaterislowerorequalthesetvalue.Reservedisplaystheheightofwatertofillupthetankuntilthemainsisopened.

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Parameters: This menu allows setting up the basic parameters such as delay between sequential flushes, volume of full and half flushes etc. The parameters that make up the algorithm for calculation flush time for a set flush volume are also editable to allow for future system changes. The system can be customized to any specific installation by selecting volume of Full flush (Fflush), volume of Half flush (Hflush), flow resistance due to shape alterations and friction (Flow R.), height of the tube, between the tank outlet and the flush outlet (Tube h), tube diameter in mm (Tube d).

A reset function of flushing records and system parameters is available at the bottom of the Parameters setup page. Note: System Reset restores default parameters as well as logged data records.

Optional UV lamp: Frequency and On-time of the UV lamp can be set from this menu. Interval is the time between each period the lamp being on. Period is the duration of the On-time for the lamp. The end user can determine the frequency for the UV lamp operation to suit seasonal rainfall.

Time/Date: DD/MM/YYYY is editable in the same way to the Parameter setup menu: press the up or down buttons to select the parameter that you wish to change, press the enter button to activate editing. The selected part can be set by pressing the up and down buttons. To deactivate editing, press the enter button again.

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8.4 BMS ModBus RS485

1. To test reading the variables from the Flow Stow control remotely, please,

follow the following steps: 2. Connect the USB-to-RS485 converters A, B & GND connections to the

corresponding connections on the panel. Connect the converter to a computer through the USB connection.

3. Install USB to RS485 converter drivers as provided on CD-ROM 4. Install QModBus as provided on CD-ROM. 5. Launch QModBus. 6. Select Prolific USB-to-Serial Comm port in Serial port drop-down menu. 7. Choose Read Holding Registers for Function code. 8. Set number of coils to 17. 9. Press Send and current value will be displayed in the Registers below. 10. Press Send again to refresh data view

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The following readings are displayed in the registers:

0. Height of water in the tank, centimeters - Register 0 1. Volume of full flush, millilitre - Register 1 2. Volume of half flush, millilitre - Register 2 3. Water consumed from the mains, litre - Register 3 4. Total volume of water, flushed through the system, litre Register 4 5. Total volume of all full flushes, litre Register 5 6. Total volume of half flushes, litre Register 6 7. Total number of full flushes Register 7 8. Total number of half flushes Register 8 9. Total water saved, litre - Register 9 10. Volume of mains water, consumed since January, litre Register 10 11. Total volume of water, flushed since January, litre Register 11 12. Volume of full flushes since January, litre Register 12 13. Volume of half flushes since January, litre Register 13 14. Number of full flushes since January Register 14 15. Number of half flushes since January Register 15 16. Total number of flushes since January Register 16 17. Total water saved since January, littre - Register 17

8.5 Firmware upgrade

In case any changes are required or software upgrades need to be performed, the special programming device is provided. Below are the steps on how to update the software. In the unlikely event of software upgrades Pipex px will contact the end user and assist with technical support to complete the operation.

i. Install AVR Studio program. ii. Open the box and connect the programming device to the header as shown on the picture. Note: Please,

pay attention to the direction the programming device is connected. iii. Connect the programming device to computer with USB cable. iv. Open AVR Studio, click on Tools in the menu. Then click on Program tag, select source file with .hex file

extension from your hardware and click Program.

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After updating the firmware, go to the Set up -> Parameters -> Reset Parameters (on the panels LCD screen) to reset the panel to default start up values.

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9. Recommended Spares 9. 1. Pipex px Maintenance Agreement Contact Pipex px for details of maintenance agreement for FLOWSTOW Tel +44 (0)1752 581 200 Fax +44 (0) 1752 581 209 sales@pipexpx.com

The list below is a guide of spare components which can be obtained through Pipex px. It will be up to the end user to determine quantities required to suit the installed FLOWSTOW system. 1. Actuated Flushing Valve 24v DC 2. Push Buttons for flush control 3. Access Cover 3mm EDPM Gasket 4. Mains water solenoid valve 24v DC 5. Rain water outlet glass medium filter 6. Optional UV lamp, data sheet available if applicable

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Flowstow - Title page Title (1)PX-FS-GA-SPEC Rev E A3 PDC (1)PX-FS-GA-SINGLE A3 PDC (1)PX-FS-GA-TWIN A3 PDC (1)PX-FS-GA-TRIPLE A3 PDC (1)PX-FS-12-2012 V2