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For Domestic RainSava

Rain Water Harvesting Systems


Table of Contents 1 General Information .......................................................................................................................................... 5 2 Safety .............................................................................................................................................................. 6

2.1 Qualifications of Personnel ............................................................................................................................ 6 2.2 Personal Protective Equipment [P.P.E.] ........................................................................................................... 6 2.3 GRP Tank .................................................................................................................................................... 6 2.4 Electrics...................................................................................................................................................... 6

3 General Description – How the RainSava Works .................................................................................................... 7 4 Plant Components ............................................................................................................................................. 8

4.1 RainSava GRP Tank ...................................................................................................................................... 8 4.2 Primary Filter .............................................................................................................................................. 9 4.3 Submersible Pump and Suction Filter ........................................................................................................... 10 4.4 Pressure Switch & Mains Water Top-up ......................................................................................................... 10

5 Installation Guidelines ...................................................................................................................................... 11 5.1 Transportation, unloading and storage of tanks ............................................................................................. 12 5.2 Stage 1 – Planning – Locating RainSava Components ..................................................................................... 13

5.2.1 Location of Tank................................................................................................................................... 13 5.2.2 Location of Controlmatic........................................................................................................................ 13

5.3 Stage 2 - Groundworks ............................................................................................................................... 13 5.4 Stage 3 – Submersible Pump Assembly ........................................................................................................ 16 5.5 Stage 4 - Interior work ............................................................................................................................... 18 5.6 Stage 5 – Commissioning ........................................................................................................................... 21


Table of Figures Figure 1 - Typical RainSava Domestic Rain Water Harvesting System ............................................................................... 5 Figure 2 - Typical Domestic RainSava Layout Diagram .................................................................................................... 7 Figure 3 - Typical Domestic RainSava GRP Tank ............................................................................................................ 8 Figure 4 - Submersible Pump and Suction Filter Assembly ............................................................................................ 10 Figure 5 - Controlmatic [Pump Controller]................................................................................................................... 11 Figure 6 - Type AA air gap Tundish ............................................................................................................................ 11 Figure 7 - Mains Top-up Float Switch [Normally Closed] ............................................................................................... 11 Figure 8 - Wisy WFF Filter - Inlet/Outlet Connections ................................................................................................... 14 Figure 9 - Tank Excavation Minimum Dimensions ......................................................................................................... 15 Figure 10 - Mains Top-up Float .................................................................................................................................. 16 Figure 11 - Submersible Pump Connections Diagram .................................................................................................... 17 Figure 12 - Suction Filter Diagram ............................................................................................................................. 17 Figure 13 - Correct orientation of Pump with Floating Suction Filter ................................................................................ 18 Figure 14 - Domestic RainSava Dimensions ................................................................................................................. 24

List of Tables Table 1 - Domestic RainSava Tank Dimensions ............................................................................................................ 24

RainSava – Installation, Operation and Maintenance Manual

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Installation, Operation and Maintenance Manual

1 GENERAL INFORMATION Before working on the RainSava Rainwater Harvesting System, please read this manual in its entirety, paying special attention to section 2 relating to Health and Safety. Normal safety precautions should be taken at all times, as well as the appropriate procedures to avoid the occurrence of accidents. There are three important principles of rainwater storage that ensure the quality of stored water. Firstly, water that enters the tank must be ‘calmed’ - i.e. rather than openly discharge into the tank it should be directed to the bottom where it can gently percolate upwards, below the minimum water level. Secondly, the tank must overflow periodically, at least twice per year, in order that any floating debris can be removed by the skimming effect of a suitable overflow device. For this reason the volume of the tank should be carefully calculated to ensure that overflow conditions occur. These first two principles are taken care of by the ‘smoothing inlet’ and the ‘multisiphon’ overflow trap fitted to RainSava tanks as supplied by ourselves. If you have sourced or constructed out own tank, similar arrangements should be incorporated into the design. Thirdly, water should be extracted from the cleanest part of the tank; i.e. just below the surface, as achieved by the use of a fixed or floating suction filter. This ensures that the water extracted avoids both floating debris and bottom sediments. It is important that this bottom sediment is not disturbed as in time it will form a beneficial biological layer that assists in maintaining water quality. Your rainwater system has been designed with these principles in mind and it is important for the well-being of the system that they are observed. It is also important that any water entering the tank should be as clean as possible and this is ensured by use of Wisy rainwater filters. It must therefore be observed that the filter elements are only removed for cleaning purposes and that this is done when no water is flowing through the unit (i.e. in dry weather!) It is most important that these filters are kept clean and we therefore recommend that the stainless steel filter element of all Wisy FS or WFF filters is removed for cleaning approximately every two months (or more often if it proves necessary). A visual check is not sufficient. Often the filter element is dirty even when it appears clean to the naked eye; a biofilm can develop within the fine mesh, effectively blocking the holes. Cleaning is achieved by either brushing with a fine nylon brush with washing up liquid and running water or in a dishwasher. Blowing through with a high pressure air-line has also proved effective. This is the only routine maintenance necessary for the operation of the system, although we do recommend a visual check of the tank and its’ components on an annual basis. The system is made up of a number of separate components. Some of these are to be located in the underground storage tank, whilst the flow controller, the mains water top-up assembly and the level gauge (if used) are to be fitted in a convenient location within the building (e.g. utility or plant room).

Figure 1 - Typical RainSava Domestic Rain Water Harvesting System


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2 SAFETY These operating instructions contain basic information on the installation, operation and maintenance of the RainSava Rainwater Harvesting System and should be followed carefully. For this reason it is essential that these instructions are carefully read and understood before installation or commissioning by both the installation crew as well as those responsible for the operation and maintenance of the plant. The operation instructions should be readily available at the location of the plant. It is the responsibility of the owner to ensure that the plant is operated and maintained correctly and in a safe manner at all times.

2.1 QUALIFICATIONS OF PERSONNEL The personnel responsible for the installation, inspection and maintenance must posses the required qualifications for the work.

2.2 PERSONAL PROTECTIVE EQUIPMENT [P.P.E.] Personnel carrying out work on the Rainwater Harvesting System are responsible for ensuring that the have all the necessary PPE before installin/inspecting/maintenance/repair on the plant. All PPE must be in good condition and be fit for it’s intended purpose. Typical PPE [Where required] –

Waterproofs Overalls Safety footwear Eye, ear and respiratory protection Face visors are particularly effective against splashes.

2.3 GRP TANK The tank may contain very low levels of oxygen. Tanks have 'manholes' to be used only when cleaning and inspecting from the outside. The following are safety issues with buried tanks.

Never enter the tank unless you have the necessary “Confined Space” training certification.

Caution – After working on any part of the RainSava system, always perform the following: Wash hands thoroughly. Wash hands before eating, drinking or smoking. Change clothes before entering homes, food stores, restaurants, etc.

Disused or abandoned tanks should be demolished, filled in or sealed so that accidental entry is impossible. Having a trained professionals work on your wastewater treatment system is the safest way of having repairs performed.

2.4 ELECTRICS All power isolation switches should be turned off [Follow Lock-out/Tag-Out Procedure] before any maintenance/inspection work is done at the tank. All connections to the Controller panel should only be made by competent qualified personnel only. If a cable is damaged, it should be replaced immediately to prevent electrical shock or damage to the electrical equipment.


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3 GENERAL DESCRIPTION – HOW THE RAINSAVA WORKS

Figure 2 - Typical Domestic RainSava Layout Diagram


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Item Description Notes - 1 Wisy WFF vortex filter 2 Calmed Inlet Pre-installed in RainSava Tank. 3 Submersible Pump Model depends on pumping requirements. NB the Power Cable for the Pump

must be connected to the Controlmatic. 4 Floating Suction Filter 5 Controlmatic [Pump Controller] A combined pressure switch/flow controller 6a Solenoid Valve 6b Float Switch – Mains Top-up 6c Type AA air gap Tundish 7 32mm MDPE pipe 8 110mm Inlet Pipe Not Part of Anua Scope of Supply 9 Overflow trap Pre-installed in RainSava Tank 10 Level Gauge Optional Extra 11 Mains Water Supply

Rainwater is collected from the roof drainage system by the underground Wisy WFF vortex filter (1).This filters out the debris and diverts about 90% of the water into the storage tank. The remaining water goes to soakaway or storm drain in the usual manner, as does the excess water from the tank. As water enters the tank it passes through a calmed inlet (2) which calms the flow of water and prevents disturbance of the float switch and any sediments. Water is then supplied on demand by the submersible pump (3) through a floating suction filter (4) to specific non-potable outlets, usually WCs, washing machine and garden tap. The pump is connected to a special controller (5), which turns the pump on and off when required and also gives dry-running protection to the pump if it should become necessary. Mains water (11) top-up is provided directly to the tank by a solenoid valve (6a) controlled by a float switch (6b). Water is discharged to the tank via a type AA air gap Tundish (6c) compliant with current water regulations. This gravity-feeds to the tank through 50mm pipe that then connects to the outlet pipe from the filter. Water is pumped through 32mm MDPE pipe (7) up to the flow controller. Delivery pipe and cables are ducted to the house through a 110mm drainage pipe (8). An overflow trap (9) provides a water seal against any foul odours from drains. N.B. – an anti-backflow version is available when connecting to sewer. The optional level gauge (10) gives a visual indication of tank water level.

4 PLANT COMPONENTS

4.1 RAINSAVA GRP TANK Glass-reinforced plastic or GRP is a composite material made of a plastic matrix reinforced by fine fibers made of glass. The size of the Tank depends on the household requirement.

Note – It is important the tank is installed in accordance with this manual to ensure the structure stability of the tank.

Figure 3 - Typical Domestic RainSava GRP Tank


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4.2 PRIMARY FILTER The underground vortex filter is located prior to the inlet of the RainSava tank and prevents the transfer of debris to the tank. Water containing debris is diverted to mains drainage/soakaway. A mesh basket located within the filter housing retains larger debris (leaves etc) and therefore reduces the risk of blockages within soakaways. The filter design ensures:

Only ‘clean’ rainwater enters the RainSava tank Easy maintenance / removal of the mesh basket Helps to maintain the quality of stored rainwater and also prolong the pump life


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4.3 SUBMERSIBLE PUMP AND SUCTION FILTER The submersible pump supplies water to required applications on demand. The type of submersible pump selected is based on application requirements (e.g. domestic/Total Pumping Head etc). A floating suction filter only takes water from just below the water surface which is the site of the cleanest water. The suction filter consists of a fine mesh filter which provides the benefit of added filtration. We can supply a singular duty only pump (normally used on domestic applications) or duty standby pumps which can be used on larger applications.

Figure 4 - Submersible Pump and Suction Filter Assembly

4.4 PRESSURE SWITCH & MAINS WATER TOP-UP The pump is controlled by the Controlmatic [a combined pressure switch / flow controller] which turns the pump on and off on demand. The pressure switch includes for a dry run protection facility which prevents the pump from operating when the water level within the tank is low. A control panel is supplied on applications which require either an indirect system or duty standby pump set up. The control panel provides an additional benefit of an integral alarm in case of pump failure. The RainSava system automatically switches to mains water when minimal levels are reached for the pump to operate. This thereby ensures that a constant water supply is maintained without user intervention.


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Figure 5 - Controlmatic [Pump Controller]

Figure 6 - Type AA air gap Tundish

Figure 7 - Mains Top-up Float Switch [Normally Closed]

5 INSTALLATION GUIDELINES Before working on the RainSava System, please read this manual in its entirety, paying special attention to section 2 relating to Health and Safety. Normal safety precautions should be taken at all times, as well as the appropriate procedures to avoid the occurrence of accidents. Please pay special attention to the following Items prior to installing the RainSava System.

IMPORTANT: Please read and understand these notes fully and plan where each of the components will be fitted before commencing

work. Decide upon the location of the components, particularly the pump controller, the mains water top-up assembly and the

tank level gauge. These items must all be located in a dry, frost-free position, e.g. utility room. Refer to the accompanying drawings.

The 32mm MDPE pipe should ideally be black, not blue, or else marked to distinguish it from the mains water supply. Interior pipework should also be clearly identified as non-potable. We stock a self-adhesive marker tape for this purpose. Install the WFF filter following the instructions included with it. We recommend that where WCs or other appliances fitted with float inlet valves are connected to the system, these

should be of a rapid shut-off type – e.g. ‘Fluidmaster or ‘Torbeck’ Note that the electrical plugs on the pump and solenoid valve are of the continental type. These fit into corresponding

sockets and on no account should you attempt to change these for UK plugs. The ‘Controlmatic’ flow controller is supplied with a UK 13amp plug top and a UK adapter is supplied with the mains top-

up kit. All electrical work should be carried out by a qualified electrician. Delivery The Contractor is responsible for offloading. The following instructions are offered as guidance only. Anua. cannot accept any liability for incorrect off-loading or installation. Do – Check that all items delivered correspond with the Packing Note Off-load the Unit using a suitable mechanical operated equipment by trained personnel Only Lift the unit with certified Webbing Straps Do Not - Do not wrap chains around the unit Do not lift the tank if it contains any water Do not subject the unit to sharp impacts.


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5.1 TRANSPORTATION, UNLOADING AND STORAGE OF TANKS

1. Always set the tanks on flat smooth ground free from debris etc. Tanks may be required to be tied down and chocked to prevent movement.

2. Tank dimensions vary – please consult the drawings accompanying the system. 3. Tanks must be held down during transportation using nylon straps, do not use cables or chains to hold tanks 4. Do not over tighten straps to cause deformation of the tank shell 5. Tanks are best lifted by crane and webbing lifting straps – do not use chains or wire ropes in contact with the tank. 6. Tanks may be lifted with suitable site equipment but greater care is needed to control the lift and to ensure the tank

is not damaged. 7. Move tanks only by lifting and setting, do not drag or roll 8. Do not drop or roll tanks. 9. Place tanks carefully onto a smooth level even surface, free from rocks, large stones or other debris that could cause

point loads. 10. Chock tanks using tyres, sandbags or similar to prevent rolling. 11. In high wind conditions, consideration should be given to strapping down the tanks to prevent damage.


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5.2 STAGE 1 – PLANNING – LOCATING RAINSAVA COMPONENTS It is vital that you plan where everything is to go, prior to commencing any works to ensure correct installation with minimum effort.

5.2.1 Location of Tank The tank must be positioned so that there is a sufficient fall from the WFF filter outlet to the Inlet of the RainSava Tank. The Tank should also be located away from areas of traffic or superimposed loads. [If this is not possible a suitably designed reinforced concrete slab should be constructed to dissipate any of these loadings away from the unit. A suitable compressible material will be required between the slab and the unit if the slab is constructed directly above the tank. Also the Standard invert is 1m, however a maximum invert of 1.2m can be provided, at an additional cost.

5.2.2 Location of Controlmatic The Controlmatic must all be located in a dry, frost-free position, e.g. utility room. The following ducts should be ran out from the room containing the Controlmatic in the direction of the RainSava Tank location.

1. 150mm Pipe for Ducting the following items from the RainSava Tank to the Controlmatic; [See Fig 2] 32mm Black HDPE – Water from Submersible Pump to Underside connection on Controlmatic Pump Power Cable - from Submersible Pump to Socket connection on the side of the Controlmatic Float Cable – from Mains Top-up float in Tank to Piggy back plug connected to Mains Top-up Solenoid. Level Gauge Tubing [Optional Extra] – From Tank back to Optional Tank Level Gauge.

2. 110mm Pipe to bring water from Mains Top-up to between the Wisy WWF Filter and the RainSava Inlet Pipe [See Fig

2]

5.3 STAGE 2 - GROUNDWORKS 1. Lay the pipework for the mains water top-up from a suitable point in the building. The pipework inside the building

should be 50mm waste, then change to below- ground waste pipe using a suitable adapter (e.g. Osma part nos. 4D.299 or 4S.096). This pipe can then be joined to the 110mm pipe that connects the filter outlet to the tank. This way both mains and rainwater can enter the tank through the same inlet pipe. (see figure 2)

2. Lay the 110mm pipe to act as ducting from the building to the tank. Avoid sharp bends to ease the task of feeding

the pipe and cables through the duct (use two 45º bends rather than one 90º). A nylon draw-cord should be placed into the duct when it is laid to enable the cables to be pulled through. Do not backfill any trenches until the installation is complete and the system has been tested.

3. Lay the 32mm MDPE pipe from the house to the tank: the pipe should be of sufficient length to reach from the centre

of the tank directly above the pump to the location of the pump controller in the house (see figure 2).

IMPORTANT: Rainwater Downpipes should join directly to drainage pipes via drain connectors and not via gully traps. This avoids the

risk of someone inadvertently pouring undesirable liquids into the system, resulting in contaminated water. (e.g. painters slops, garden chemicals etc.)

4. Lay the 110mm pipework to and from the WFF filter and from the tank to the soakaway. The pipe leading into the filter must only be connected to rainwater downpipes and must not receive surface water run off. The WFF100 filter accepts standard 110mm pipe. A fall of at least 1:100 must be provided for the water inlet pipes. All pipework in the ground should be bedded and surrounded with 150mm pea gravel or sand.


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Figure 8 - Wisy WFF Filter - Inlet/Outlet Connections

5. Locate the WFF filter prior to the RainSava Inlet Pipe and connect the pipework ensuring that the connections are watertight.

Important In areas where very high water tables are a problem it may be advisable to provide a weighing slab to prevent flotation. If installed in areas of traffic or if superimposed loadings will be applied above the tank, a suitably designed reinforced concrete slab should be constructed to dissipate any of these loadings from the unit. A suitably compressible material will be required between the slab and the unit if the slab is constructed directly above the tank. All installation procedures should be carried out observing the requirements of the Health and Safety at Work Act and involving good building practice.

During installation of the RainSava Tank the following items will be required.

Normal construction equipment and plant Concrete to 20 Newton’s/mm and 30-55 slump [Based on standard install depth and ground conditions] An adequate supply of water capable of keeping up with the rate of concrete back-filling Pumping equipment where necessary

6. Excavate to the tank dimensions allowing a further 225mm minimum to all sides and 300mm to the base Check that there is a fall between the WWF Filter and the Inlet Pipe of the RainSava Tank]. Level the base of the excavation. The excavation should be carried out in accordance with BS 8000 – 1:1989 Workmanship on building sites. The excavation should be prepared such that there is no risk of puncture or any other damage to the tank structure during installation. In wet ground conditions it is important that the excavation is kept dry throughout the installation and until the concrete surround has cured (normally seven days). The use of pumps and pump sumps is recommended in cases of high water tables de-watering equipment may be required.


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Figure 9 - Tank Excavation Minimum Dimensions

7. Pour the concrete base to a level of 300mm and level. Allow initial set.

8. Lower the tank into position onto wet concrete using webbed straps taking care not to damage any external flanges or pipework. Ensure correct orientations of the inlet/outlet pipework and any other connections.

9. Stabilise tank in excavation taking care not to distort unit.

10. Place temporary covers over all tank apertures

11. Commence back filling with concrete at a maximum of 500mm lifts allowing an initial set before the next pour, at the

same time commence filling the tank with water such that the levels of concrete and water remain equal. The concrete needs to be evenly distributed around the tank at all times.

Important: Do not discharge concrete directly onto the tank body.

12. Ensure the concrete is worked under the tank to prevent voids compact by hand. Do not use vibrating pokers. Over compaction of the concrete may result in damage or distortion of the tank structure.

13. Connect and seal pipe work. NB: Tanks supplied with loose turret(s). The turret(s) should be fitted into position and a waterproof seal made between the mating services with a proprietary waterproof sealant (not of Acorn supply). In areas of high water table, it may be necessary to wrap suitable tape or equivalent around the joint to prevent water ingress.

14. It is the responsibility of the installer to ensure a water tight seal.


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15. Continue placing concrete until a minimum cover of 225mm above the top of the tank is achieved (based on a

maximum turret depth of 1m).

16. Back fill excavation to ground level. Free flowing material (not sand) may be used above concrete if desired. Position manhole covers and frames over turrets.

If further information regarding the installation of the RainSava Tank is required please do not hesitate to contact the technical department of Anua – Telephone +353 45 439580

5.4 STAGE 3 – SUBMERSIBLE PUMP ASSEMBLY

1. Float switch. Fit the float switch assembly according to the instructions supplied with the unit. The worm-drive clamp can be fitted to the body of the pump, but ensure it is not likely to foul on the suction filter. The ‘switch point’ of the float switch must be above the level at which the suction filter can no longer extract water, we recommend fixing the clamp approximately 300mm above the base of the pump.

Figure 10 - Mains Top-up Float

2. Pump. Follow the separate instructions for the Multigo pump and remember to fit the rubber feet to the baseplate. Assemble the short length of plain rubber pressure hose and the brass fittings and the worm-drive hose clamps as shown in the diagram below. Connect this to the outlet (top) port of the pump. The hose will have to be cut to length so that it can be connected to the MDPE pipe from the duct – this can be measured with the pump in the tank on its platform, always allow for a bit of slack for future serving and maintenance. N.B. - Use a thread sealant (e.g. Loctite) on the brass nipples where they fit into the pump body.


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Figure 11 - Submersible Pump Connections Diagram

3. Suction Filter. You will have been supplied with either a fixed suction filter (FAFF) or a floating suction filter (SAFF).

To fit the fixed filter, screw the brass nipple into the pumps’ suction port and then screw on the 90º bend attached to the filter. To fit the floating filter, attach the 1m length of suction hose (with pre-fitted brass fittings) to the inlet (bottom) port of the pump in the same way. The floating suction filter can now be fitted to the other end of this hose. Ensure all joints are tight.

Figure 12 - Suction Filter Diagram

4. Carefully lower the complete assembly (pump, float switch and suction filter) into the tank using the cord supplied that attaches to the ring on top of the pump. This cord must remain attached in case you ever need to remove the pump. The loose end should be tied to a convenient point where it can be easily reached. (it may be a good idea to fit a brass or stainless steel eye to the inside of the tank for this purpose)

Note – Rainsava tanks are fitted with a platform directly below the access shaft on which the pump should stand.

5. The cables from the pump and the float switch must be fed through the duct pipe to the building. These can be pulled

through using the draw cord that was previously placed in the duct.


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Note – If you are installing a tank level gauge with your system, it is wise to also include the tubing supplied with this with the cables, thus drawing all three through the duct at the same time.

6. For pumps fitted with a floating suction filter (SS 99 31) - Once in the tank, orientate the pump so that the suction

filter is facing along the length of the tank – this ensures that there is no risk of the filter becoming caught on the side of the tank as it empties.

Note – Systems using smaller tanks (3000L or less) are supplied with a fixed suction filter (SF 99 21) and this eliminates the problem.

Figure 13 - Correct orientation of Pump with Floating Suction Filter

7. With the pump in its final position, connect the 32mm MDPE pipe from the service duct to the brass elbow fitting at the top of the rubber pressure hose. Ensure the pump sits steadily on its platform. It should be vertical and should not have any lateral pressure exerting upon it from the outlet hose

5.5 STAGE 4 - INTERIOR WORK

1. The services duct from the tank should terminate in a convenient location within the building (e.g. utility room). The following services should be present within the duct:

Pump power supply cable – Item 1 Delivery pipe from pump (32mm MDPE) – Item 2 Float switch power supply cable) – Item 3 Small-bore tube from pneumatic level gauge (if used) ) – Item 4


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Note – If a proprietary pipe bung is to be used then the pipes and cables should be passed through it at this point. The bung can then be inserted into the end of the duct pipe to form a seal. Alternatively, the end of the duct should be sealed by some other means to prevent cold moist air from the tank entering the building.

2. Water Level Indicator (if supplied). Mount the display unit in a suitable location inside the building. Follow the separate instructions supplied with this unit. The air tube that is supplied with the unit should be long enough to reach to the base of the tank. Additional tube and connectors are available if required.

3. Controlmatic – [Pump Controller]. This device serves to automatically switch the pump on and off as and when required. It also provides the pump with dry-running protection. Fix the ‘Controlmatic’ flow controller unit (SA 04 00) to the wall using the mounting bracket supplied. N.B. - this device must be mounted in an upright position, i.e. with the inlet at the bottom. Separate instructions are supplied with this unit. Note that the unit can be mounted with the outlet either to the right or the left. Connect the MDPE pipe from the pump to the bottom inlet port of the flow controller with the 1” brass fitting provided.

4. Fit the 1” isolating valve with drain cock on the outlet side of the ‘Controlmatic’ unit to assist in any future

maintenance of the system. The internal pipework to supply toilets/washing machine/taps can now be connected to this valve.

5. Connect the plug on the end of the pump power cable into the socket of the Controlmatic unit. Fit the UK standard plug to this unit and then connect into the mains power supply.

6. Mains top-up assembly. This consists of four items;

special ‘piggy back’ plug UK 2-pin adapter special float switch mounted on a worm-drive clamp solenoid valve/Tundish assembly.

The float switch should already have been fitted to the pump and should now be located in the tank. (see Figure 10)


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7. Fit the hose with the solenoid valve and Tundish assembly. The Tundish fits directly into the 50mm waste pipe you

previously installed. (see sketch on page 12) Connect the other end of the assembly to the mains water supply, having first closed the integral manual isolating valve. N.B. – built into this valve is a dirt strainer designed to protect the solenoid valve from any particles that may cause it to malfunction. This strainer should be periodically removed and cleaned if necessary.

8. Connect the lead from the float switch into the special ‘piggy back’ adapter according to the instructions supplied with the top-up kit.

9. Plug the European plug from the solenoid valve into the socket of the ‘piggy-back’ adapter. Plug this into the UK

adapter and then this in turn into a mains power supply.


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5.6 STAGE 5 – COMMISSIONING

1. If the tank is still empty at this stage, the solenoid valve will open and the mains water top-up will activate. If necessary (e.g. if splashing occurs at the tundish), reduce the flow by adjusting the manual valve on the top-up assembly. The solenoid valve should shut off the mains supply when the water in the tank raises the float switch.

2. Now that you have some water in the system, the pump should operate. Turn on a tap connected to the system or

flush a toilet several times to purge the air from the pipework. The pump should activate and begin pumping water. If the pump cuts off again, press and hold the red ‘Start’ button on the Controlmatic switch until it starts pumping again. (you may need to do this more than once)

3. Check all pipes and joints for signs of leaking and rectify accordingly. Also check the system pressure on the gauge

fitted to the Controlmatic switch, it should read no higher than about 4 bars.

4. Apply marker tape to all pipes in the building that are connected to the system, such as the supply pipes to the WCs and washing machine. The pipes should be clearly labelled along their entire length and labelling should state that the pipes content is ‘unwholesome’, ‘non-potable’, ‘not for drinking’ or similar. This clearly identifies the water as being other than from the mains supply:

5. Similarly, any taps, valves and any other outlets connected to the system should be clearly identified. We stock a self

adhesive label for this purpose;

6. Your rainwater system is now operational and should require no further routine attention other than regular checking and cleaning of the WFF filter insert. Normally, every couple of months is enough, but check regularly at first until you establish the appropriate time interval for your situation. If a lot of dust is present the cleaning times may be more frequent.

Note – It is very important that the filter is kept clean and failure to do so will result in a decrease in efficiency

7. If you encounter any problems or are unsure about how to proceed with any part of the installation, please call our

support line on 045 439580.

8. If for any reason you need to prevent the WFF filter from operating (e.g. work on the storage tank or the inlet pipe), a ‘blind’ filter insert is available for hire from Anua. This allows all the water to pass directly to the soakaway outlet.


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110mm Inlet from House [Roof Downpipes]

110mm Outlet To Soak-Away

110mm Outlet To RainSava Tank [Inlet Side]


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110mm Outlet To Soak-Away

110mm Inlet To RainSava Tank


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Figure 14 - Domestic RainSava Dimensions

Capacity

Litres [Nominal] Diameter

mm O/A Length

mm A

mm B

mm 1,200 1000 1780 1050 850 1,500 1200 1660 1250 1050 2,000 1200 2200 1250 1050 2,400 1200 2470 1250 1050 3,000 1500 2150 1500 1300 4,000 1500 2700 1500 1300 5,000 1500 3250 1500 1300 6,000 1850 2850 1820 1620 7,500 1850 3600 1820 1620 10,000 1850 4450 1820 1620 12,000 1850 5400 1820 1620

Table 1 - Domestic RainSava Tank Dimensions


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