AES Mini Drain Small Drainage Pumping Station Instruction Manual

Instruction Manual

MINI DRAIN Pumping Station

INSTALLATION, OPERATING & MAINTENANCE GUIDELINES
SPECIFIC DETAILS OF THIS INSTALLATION

Customer Name:|
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Job/Invoice Number:|
Delivery/Handover Date:|
Tank Type:|
Number of Pumps:|
Pump Make:|
Pump Model:|
Pump Motor Voltage:|
Manhole Cover Rating:|
High-Level Alarm Unit:|
Control Panel Model:|

For any queries relating to this equipment, or for the supply of spare parts, servicing, and full technical support, please contact:
Automated Environmental Systems Ltd., Unit 1, 1 Wimbledon Avenue, Brandon, Suffolk, IP27 0NZ
01842 819130 | [email protected]
WARNING!
THIS PUMPING STATION IS NOT DESIGNED TO HANDLE UNTREATED EFFLUENT
The following items must be kept out of the pump chamber:
Raw Sewage | Baby Wipes | Nappies | Cleaning Wipes | Sanitary Towels
THESE TYPES OF ITEMS WILL BLOCK PUMPS AND/OR PIPEWORK
ANY CALLOUT TO UNBLOCK PUMPS AND/OR PIPEWORK WILL BE CHARGEABLE AND WILL NOT BE COVERED UNDER THE WARRANTY

PREFACE

This Operating & Maintenance Manual is divided into various sections, each section providing information for the equipment supplied.
WARNING: THIS IS GIVEN TO DENOTE DANGER TO PERSONNEL WHERE FAILURE TO OBSERVE THESE INSTRUCTIONS COULD RESULT IN INJURY OR DEATH CAUTION: THIS IS GIVEN WHERE FAILURE TO OBSERVE THESE INSTRUCTIONS COULD RESULT IN DAMAGE TO EQUIPMENT OR POLLUTION OF A SYSTEM BUT NOT A DANGER TO PERSONNEL
IMPORTANT NOTE
The information contained within this manual is intended for use by personnel suitably trained and qualified in the technologies applied to the equipment supplied.
Whilst every care has been taken during the compilation of this manual to ensure that the information provided is correct, no liability can be accepted by Automated Environmental Systems Ltd., or any of its employees for loss, damage, or injury caused by any errors in, or omissions from, the information is given.
HEALTH & SAFETY: IT IS ESSENTIAL THAT ONLY THOSE WHO ARE QUALIFIED AND AUTHORISED TO DO SO ARE ALLOWED TO WORK ON THIS EQUIPMENT WARNING: PERSONNEL SHOULD ALWAYS ENSURE THAT ADEQUATE ELECTRICAL AND MECHANICAL ISOLATIONS ARE APPLIED WHEN WORKING ON PLANT EQUIPMENT. IT SHOULD BE NOTED THAT THE PLANT EQUIPMENT CAN START AUTOMATICALLY WITHOUT WARNING

HEALTH & SAFETY

(United Kingdom Health & Safety at Work Act 1974)
Section 6 (a) of this Act requires manufacturers to advise their customers on the safety and serving of their products.
The user’s attention is therefore drawn to the following:

1. The appropriate sections of this manual must be read before working on the equipment
2. Installation, operation, and maintenance must only be carried out by suitably trained /qualified personnel 3. Normal safety precautions must be taken and appropriate procedures observed to avoid
   accidents

Note: It is the responsibility of the customer and/or the contractor to ensure that anyone working on the equipment is using all necessary personal protective equipment, is aware of appropriate health & safety warnings, and has read the information contained in this section of the manual.
Checklist: In addition to any safety instructions in the various equipment sections of this manual, it is also essential that all persons involved in the operation and maintenance of the pump station are made aware of the dangers associated with the entry of a pump station and take the necessary safety precautions.
ONLY qualified personnel with current Confined Space Entry certification should enter a pump chamber, and then only if there is a second qualified person equipped with required safety equipment supervising.
The following checklist, although not comprehensive, must be followed:

• Conduct a risk assessment before entering the chamber, and fill out the associated form
• Do not enter the pump station unless absolutely necessary
• Never work alone, use a lifting harness, safety line, and respirator
• Do not ignore the risk of drowning · Beware, rungs can give way without warning
• Check that lifting equipment is of an approved type and is in a good and safe condition
• Do not ignore the risk of electric shock, use only equipment protected by an RCD
• Isolate power at the control panel before entering the chamber
• Place a suitable barrier around the work zone that meets local rules for safety at work
• Make sure there is a clear path of retreat from the point of installation
• Use all the necessary personal safety equipment such as a helmet, safety goggles, rubber gloves, and protective footwear
• Do not ignore the risk of infection
• The highest standards of personal  hygiene and all local regulations should be observed
• When removing a pump from the chamber, make sure that power is isolated and it cannot be accidentally turned on
• Clean equipment thoroughly before starting to work on it

SAFETY PRECAUTIONS

Before installation, operation, or maintenance of the pump system, please read these instructions and the manufacturer’s specific equipment instructions carefully.
System operation may cause injury. Take all necessary precautions. Wear necessary protective equipment. Any maintenance of these pump systems must be carried out by authorized and qualified personnel only.
WARNING – PUMP MAY START AT ANY TIME
In normal automatic mode, pumps may start automatically at any time, before maintenance or any work is carried out on pumps or motors, ensuring proper isolation of motors at the relevant controller. WARNING – SYSTEM IS PRESSURISED
Under normal operating conditions, the pipes, pumps, and components or water supply and pressure systems are pressurized.
Before unbolting or dismantling any pipework or equipment, ensure that the water supply to the areas of maintenance is isolated and water pressure is relieved.
DANGER – HIGH VOLTAGE
Control boxes contain high voltage, live wiring, and terminals.
Entry of control boxes is not permitted except by qualified electrical personnel only, ensure the controller is correctly isolated before entering.
CAUTION – EXPOSED MOVING PARTS
Keep clear of all moving parts on pumps, motors, and couplings, and keep the area around the pump system clear at all times.
WARNING – CONFINED SPACE
pump pit should not be entered by persons, systems are designed to facilitate pump removal and component servicing from the surface.
In the case of entry being unavoidable, the correct safety procedures should be carried out in accordance with current OH&S requirements.
Personnel entering should be certified for confined space entry, have completed risk assessment, evacuated chamber of dangerous gases, and be wearing breathing apparatus and safety lifting lanyard/ body harness attached to an approved lifting system.
WARNING – NOXIOUS AND DANGEROUS GASES
The system may emit dangerous gases, ensure the area is well ventilated prior to removing the pit cover/lid.

PUMP CHAMBER INSTALLATION GUIDELINES

(United Kingdom Health & Safety at Work Act 1974)
DO NOT BEGIN INSTALLATION OF THIS CHAMBER UNTIL YOU HAVE READ AND FULLY UNDERSTOOD THE REQUIREMENTS BELOW.
THE CONCRETE BACKFILL SHOULD BE DESIGNED TO PROTECT THE CHAMBER FROM ALL EXTERNAL GROUND AND GROUNDWATER PRESSURE. THEREFORE IT SHOULD BE WATERTIGHT.
ANY GROUNDWATER ALLOWED TO LEAK BETWEEN THE CONCRETE BACKFILL AND THE PUMP CHAMBER IS LIKELY TO CAUSE A BUILD-UP OF PRESSURE WHICH WILL DAMAGE THE CHAMBER.
WE CAN NOT ACCEPT RESPONSIBILITY FOR DAMAGE OR DEFORMATION OF THE CHAMBER OR PIPEWORK CAUSED BY EXTERNAL GROUND, GROUNDWATER PRESSURE, OR GROUND MOVEMENT DURING OR AFTER INSTALLATION.
DO NOT COMMENCE WITH INSTALLATION IF YOU CAN NOT CONTROL ANY GROUNDWATER PRESENT IN ORDER TO PROVIDE A DRY EXCAVATION.
IF NECESSARY LINE THE ENTIRE EXCAVATION WITH A CONTINUOUS LAYER OF PLASTIC SHEETING PRIOR TO INSTALLATION.
As with all site work, the dangers of working with water and electricity pose severe threats to health if obvious and fundamental precautions are not taken. Therefore if you are in any doubt about any of the following, please do not hesitate to contact us.
All site work should be undertaken by qualified personnel only.

Lifting & Storage

Tank delivery is direct to the site via a courier, any pumps, alarm panels, and internal pipework will be secured within the tank, please check the contents and notify us within 48 hours of any shortages. Great care should be taken when lifting and handling the chamber and suitable equipment should be used at all times.
The nature of the design means the center of gravity of the chamber is likely to be offset.
Any storage site should be free of any object which may cause damage to the chamber, and the chamber should be secured to prevent any rolling.
WE CAN NOT ACCEPT RESPONSIBILITY FOR ONSITE DAMAGE
Pre-Installation Inspection
Before installation, an inspection of the chamber must be carried out to ensure no damage has occurred since delivery and to check all inlet and outlet connections are correct.
Any changes or repairs cannot be made once installation has begun.
Tank Installation

• Select a suitable location for the tank. This will be normally at a ground level lower than the properties being drained and allow for the falls in site drainage
• Check that no other structure or special access is required over the selected spot. Provision can always be made, if necessary, to place the tank in a roadway, provided that a suitable protective backfill is placed around it and a suitable heavy-duty manhole cover is used over the opening
• Check that no underground cable, pipe, or service duct, lies underneath
• Excavate the minimum opening in the ground to receive the pump chamber and pipework to be used. The depth of excavation needs to be at most, 500mm deeper than the overall tank depth, the sides of the excavation should be shored up for stability. A sump should be left in one corner for dewatering purposes
• A dewatering pump MUST be used in the sump to remove any groundwater present and provide a dry excavation until the concrete backfill is set, these can be found on our website www.automatedenvironmentalsystems.co.uk
• Some clean hardcore should be placed and consolidated at the base of the excavation. Usually, this will need to be around 200mm thick, but on good ground, should be a minimum of 50mm
• In order to be protected from any external force, the chamber should be completely surrounded by concrete. The concrete surrounding the chamber should be of suitable thickness, usually a minimum of 150mm, and quality to protect the chamber from all external pressure. Whether this is ground pressure, groundwater pressure, trafficked areas, or any other force which may cause damage or deformation to the chamber. Therefore a qualified civil/structural engineer MUST be consulted to specify the correct concrete backfill suitable for your specific site requirements
• Pour the appropriate amount of concrete on top of the hardcore, the minimum thickness of 200mm of CP 20Kn/mm2 strength, and then lower the chamber onto the damp concrete allowing the flanged base joint, if fitted, to settle in, ensuring that the inlet and outlet pipes are correctly aligned
• Note: In certain circumstances, the guide rails can be supplied loose for transport (e.g. when turret extensions are shipped detached). You must ensure that the guide rail poles are fitted to the guide rail duck foot at the bottom of the tank and attached to the upper guide rail bracket at the top of the access turret before concreting the tank into the ground
• Fill the chamber with clean water to a depth of approx 500mm and recheck levels. Do not overfill as the chamber is not designed to hold water when not supported by the concrete backfill
• Carefully commence pouring the concrete backfill evenly around the chamber, a maximum of 1000mm, ensuring there are no voids that may allow groundwater to penetrate. Vibrating pokers should be used with care to avoid damage to the chamber. Allow 24 hours for the concrete to harden
• Continue filling the chamber with clean water whilst evenly backfilling in stages, a maximum of 1000mm each stage, ensuring the water level is 50mm below the level of the concrete backfill, repeating the process until the concrete is approximately 300mm from the top of the chamber
• Connect up the site pipework to the inlet and outlet of the pump well, and draw the pump and float cables through the conduit to the control panel before they are encased in concrete
• Under no circumstances should concrete be poured directly onto the chamber. Attempting to pour too much concrete at once will result in the chamber `floating’ or particularly above the halfway point damage to the chamber due to excessive weight on the chamber body for which the manufacturers will not be responsible
• Finish off the surface of the concrete at the required level, depending on the final ground cover required i.e. topsoil, tarmac, gravel, etc. (see sketch below). If the access cover or the surrounding area is likely to be subject to other than purely pedestrian traffic, provision must be made to ensure that no weight loading is taken by the chamber i.e. by the construction of a cover slab, and the appropriately specified access cover must be used.

PLEASE ALLOW THE CONCRETE BACKFILL TO SET BEFORE PUMPING THE WATER FROM THE PUMP CHAMBER

ADDITIONAL INSTALLATION NOTES

• A cable duct is required with no sharp bends
• Tank water should never exceed more than 300mm past the backfill concrete level
• The inlet(s) and cable duct(s) are to be cut on-site to your own specifications and should be properly sealed with rubber grommets
• It is most important that once the tank is in situ with all the inlet  connections made, the drainage of the system should be flushed out, and all sand, debris, etc. removed from the chamber
• If vehicular traffic will be passing over the chamber, it is ESSENTIAL that the cover slab is constructed so that there is NO DIRECT LOAD on the chamber, an access cover with the correct specified S.M.W.L. must be used

WE RECOMMEND THAT ONCE THE SYSTEM HAS BEEN COMPLETELY INSTALLED, OUR ENGINEER ATTENDS THE SITE TO COMMISSION THE SYSTEM
By the beginning installation of the unit, the installer is deemed to have read and complied with the above. Failure to do so will invalidate your warranty. If you have any questions please contact us.

CHAMBER SETUP GUIDELINES

The following notes are a guideline for the setup of the chamber, pump, and optional alarm. We recommend that the installation is supervised by a qualified engineer.

• The bulkhead connection of the pipework set is to be attached through the discharge hole of the tank.
• The pump is to be situated at the bottom of the tank attached to the flexible hose using the hose tail bend and clips provided (Any excess pipework should be removed as required on-site).
• The inlet(s) and cable duct are to be cut on-site to your own specifications and should be properly
• sealed with silicon or rubber grommets.

The float switch should be positioned such that the pump starts at a point lower than the incoming inlet level and stops leaving enough liquid that the pump doesn’t run dry.

PUMP SETUP GUIDELINES

• The float switch for pump operation will be attached directly to the pump and needs to hang so as not to allow the pump to `run dry’ before the float switch switches the pump off.
• By adjusting the cable length and pivot point you can alter the level at which the pump activates.
• If the pump is running yet you are getting no flow it is most likely due to an airlock in the pipe. To ensure that the tank isn’t emptied too much and the air is sucked up, reduce the length of the float cable through the side clip to have the pump stop sooner.
• The pump lifting chain should be attached to the handle using the shackle provided so you’re able to lift the pump up without draining the tank. The other end will need to be attached according to your own specifications at the top of the tank.
• Ensure that all electrical cables are secured and cannot be drawn into the pump.

HIGH-LEVEL ALARM SETUP GUIDELINES

(if applicable)

• A wiring diagram for the high-level alarm can be found inside the alarm box.
• On the alarm float switch only use the black and brown terminals when connecting to the alarm. In this condition, the float switch contact closes in the upper part at the max. level.
• By changing the distance between the float and the counterweight placed on the cable, the control of min. and max. levels are obtained.
• The alarm float switch cable needs to come through the cable duct and hang down inside the tank so that the cable length has the float switch activated above the level of the pump float switch and below the inlet level.
• The alarm box must be sited in a dry location and not in the pump chamber.

ELECTRICAL INSTALLATION GUIDELINES

• The pump alarm (if applicable) should be mounted indoors on a wall or vertical surface.
• The alarm box float switch cable should be drawn back to your alarm box position through the underground cable duct. The cabling should not be cleated to surfaces but should be tidied by cable ties for easy removal for maintenance at a later date.
• The float switch cables are to be connected using only two of the cable cores, the color coding can be found inside the instructions manual provided with the float(s). The core that isn’t used should be cut off and isolated. It is also advisable to mark each cable before drawing it through the duct to aid in easy identification when connecting to the control panel.
• The pump main cable should also be drawn back through the underground cable duct and connected to a suitable main supply.

WIRING CONNECTIONS SHOULD ALWAYS BE MADE BY A QUALIFIED ELECTRICIAN

MINI DRAIN Packaged Pumping Station

1. The bulkhead connection of the pipework set is to be attached through the discharge hole of the tank.
2. The pump is to be situated at the bottom of the tank attached to the flexible hose using the hose tail bend and clips provided (excess hose should be removed as required on-site).
3. The inlet(s) and cable duct are to be cut on-site to your own specifications and should be properly sealed with silicone or rubber grommets.
4. The float switch should be positioned so the pump starts at a point lower than the lowest incoming invert (bottom of the inlet pipe). The tank ordered must be deep enough to allow the pump to operate in a suitably sized sump. Therefore incoming pipes should be kept as close to ground level as possible.

FAULT FINDING
(“Water in the chamber will not go down”)

1. There is insufficient water to fully tilt the pump float switch. Add more water.
2. The inflow to the chamber is too great for the pump to cope with. Check the cause of the excessive inflow and rectify it.
3. The pump is blocked. Switch the mains supply off, lift the pump from the chamber and remove the blockage.
4. The outlet pipe is blocked. Call an engineer.
5. The electrical supply has failed. Check mains supply and set of control panel switches.

(“Water goes down but pump keeps running”)

1. Check the pump float switch is free to lower with the water level and not getting tangled or caught on the pump or pipework. Adjust the float cable if necessary.

For further fault-finding procedures please see the separate operating manual provided with the pump.
ROUTINE MAINTENANCE

No routine maintenance is necessary on the pump itself, as the motor bearings are generally permanently lubricated. It is however recommended that the pump is checked every six to twelve months to ensure that the oil chamber is free from contamination (as per the manufacturer’s instructions), to check the pump for any blockages, and to clean away any build-up of fat/dirt.

1. Lift the manhole cover and secure the site for Health & Safety reasons.
2. Check the pump is operational by lifting the attached float switch.
3. Check the pump and float(s) are not contaminated with grease or other debris.
4. Check the pump is stood fully upright on the base of the tank.
5. Ensure the high-level alarm is operational by lifting the float switch (if applicable).
6. Remove any large objects which may have found their way into the chamber.
7. Close manhole.

WIRING DIAGRAM(S)
The wiring diagram(s) for the alarm unit (if applicable) are usually contained within the alarm unit for the convenience of your installer. A copy of this wiring diagram should be placed with this manual for future reference.
PUMP HANDBOOK
Each pump is supplied with its own handbook, which will normally be found within the pump packaging. A copy of this handbook should be placed with this manual for future reference.

MINI DRAIN Pumping Station User Guide

By following a few simple guidelines your MINI DRAIN pumping station will provide many years of reliable service.
This Automated Environmental Systems MINI DRAIN Pumping Station is designed to handle domestic wastewater, it is NOT designed for UNTREATED sewage.
The MINI DRAIN can be used as a final effluent system for treatment plants, however, please note that the pump supplied is suitable for handling TREATED sewage ONLY.
CAUTION:
The following items should be disposed of in a waste bin and should not be washed down a sink or shower/bath and into the system:

• Glass or metal
• Facial wipes, antibacterial wipes, or similar
• Any material such as rags or cloth
• Plastic objects
• Sand, rock, stones, or other debris

In addition:

• NO toilets should be connected directly to this system
• UNTREATED effluent, paper, or sanitary items should NOT be emptied directly into this system

Failure to follow these guidelines may invalidate your warranty, in which case any service visits and replacement pumps/parts as a result of misuse would be chargeable.
WARNING:
In addition to the items listed above you must never introduce the following into ANY sewer system:

• Explosives
• Flammable material
• Lubricating oil or grease
• Strong chemicals
• Petrol, diesel, or similar
• Cooking Oils or Fats

Power Failure
In the event of power failure, the system will not be able to pump wastewater out of the tank, in this instance try to minimize the use of sinks and showers/baths until electrical power is restored.

Automated Environmental Systems Ltd.,
Unit 1, 1 Wimbledon Avenue,
Brandon, Suffolk, IP27 0NZ
01842 819130
[email protected]
© Automated Environmental Systems Ltd. February 2022

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