Rainbow Pool Products CHEMIGEM DM52 User manual

RAINBOW POOL PRODUCTS PTY LTD
CHEMIGEM DM52 WITH PUMPS
Code Description
1 Year Warranty
00052005 Chlorine and pH controller
suitable for most pools, with
built-in pool circulation pump
timer. Supplied with 12V
peristaltic pumps having a
pressure limitation of 40 kPa.

THE TRUSTED NAME IN POOL MANAGEMENT
Pool water must be sanitised to remain safe. Chlorine is used for this purpose, but for it to be
effective the pH and other factors must be optimally set. For decades these chemicals have
been dosed by hand (and some pool owners still do) with the result being unmatched chlorine
and pH levels. This hit and miss method resulted in the use of far more chlorine and acid
than was necessary and offered variable sanitation quality for the pool. Then Chemigem was
invented – a device which measured the pH and a new concept called ORP – or Oxidation
Reduction Potential. The Chemigem controller measures these water quality parameters and
makes a decision about whether to add chemical or not – and it makes these decisions about
30 times each hour. Gone is the hit-and-miss of hand dosing, gone is the variability of water
sanitation – the era of automated water quality control has arrived.
TAKE THE GUESS WORK OUT OF ADDING CHEMICALS
The Chemigem measures pH and ORP to keep your pool water healthy. pH is a measure
of the acidity of the pool water, while ORP is a measure of the effectiveness of the chlorine
in the water. Even though two pools may have the same measured chlorine residual, the
pool with the correctly set pH is the one safe for your children to swim in. With Chemigem
the effectiveness of the chlorine is no longer a guess – it is a measured pool water quality
parameter that you the user are able to set.
LIKE AN INDUSTURIAL PROCESS CONTROLLER FOR YOUR POOL
Chemigem uses an advanced FLASH-based processor with proprietary algorithms to watch
over your pool and filtration system functions. There is a versatile control system for operating
and programming. The LCD display shows you the condition of your pool water and what
Chemigem is doing about it. The display is also used to provide information about the timer. If
the unit is turned on for a quick swim and the user forgets to turn it off afterward it will simply
turn off at the next programmed off time. There is even a provision for running the unit for a
set period from 1 to 48 hours – great for a quick swim, filtration boost or superchlorination.
The unit will even allow an external timer to take control if a home/pool automation system is
already installed.
THE VERSATILITY OF DIFFERENT MODELS OFFERING ALTERNATIVE
CHEMICAL DELIVERY SYTEMS
Chemigem has two main versions – the DM52 for domestic pools and the CM55 for large
commercial pools. Each of these versions can control various ways of feeding chemicals into
the pool water flow: vacuum valves (with/without venturi injectors), peristaltic pumps (12V and
240V) and even solenoids for erosion feeders.
Chemigem also come in models that can control Salt Water Chlorinators for pool owners that
like that method of sanitation.
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GENERAL DATA: DIMENSIONS, ELECTRICAL, APPROVAL
Chemigem
Model
Primary Use Sensing Injection /
Control Method
Clock / Timer
DM52 General /
Domestic Pools
Dual Probe
(pH +ORP)
Vacuum Valves Yes - Switched
Pump Outlet
DM52VP General /
Domestic
pools with Salt
Chlorinator
Dual Probe
(pH +ORP)
Acid Valve +
Switched SWC
Socket outlet
Yes - Switched
Pump Outlet +
SWC outlet
DM52pH Geral / Domestic
Pools
pH Probe Vacuum Valve or
12V Peristaltic
Pump
Yes - Switched
Pump Outlet
DM52CHL Geral / Domestic
Pools
ORP Probe Vacuum Valve or
12V Peristaltic
Pump
Yes - Switched
Pump Outlet
DM52 w/ pumps Geral / Domestic
Pools
Dual Probe
(pH + ORP)
Vacuum Valves /
Chemical Pumps
Yes - Switched
Pump Outlet
Dimensions Enclosure Mounting Holes
Centres
Electrical Information
(App. RCM N5296)
Width Height Depth Post Wall Volts 230 - 250V, 50Hz IP24
DM52 Series 190 mm 180 mm 125 mm 50 mm 140 mm Power All Models < 0.05 kw
INSTALLATION & OPERATION MANUAL
CAREFULLY READ THE ENTIRE CONTENTS OF THIS MANUAL
CAREFULLY READ THE FOLLOWING POINTS BEFORE INSTALLING THE CHEMIGEM
WARNING It is important that the Chemigem is installed and operated in accordance with the
instructions provided in this manual.
WARNING There is the risk of electric shock. Ensure all connections from the Chemigem to the
electricity supply are made in accordance with local safety codes.
WARNING Do not bury any electricity supply cords unless strictly following local safety codes.
Locate all cords, wires and tubes away from places where they may become damaged by
garden equipment.
WARNING The Chemigem contains microprocessors that may be disturbed by the operation of
electrical devices within a 5 metre radius.
WARNING The Chemigem must be connected so that it only operates when the pool pump is
running, otherwise incorrect pool water readings will occur and concentrated chemicals may
flow into the pool water pipes and/or the chemical drums, where they can mix and produce
poisonous Chlorine gas.
WARNING Before operating the Chemigem, bring the pool water chemical levels to within the
ranges given in this manual, but pay attention to the specific requirements of the pool builder.
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WARNING To ensure the desired chemical levels are being maintained, check the pool water
with a good quality test kit. This should be performed daily for the first two weeks and on a
regular basis thereafter.
WARNING Always take water samples from a point near the skimmer box, for this is where
the water is completely mixed, giving the most accurate readings. Never take water samples
near the pool returns (“eye-balls”) where the Chemigem may have freshly dosed the pool
water.
WARNING It is very important that the reagents in the test kit are well within their use-by
date, otherwise false readings may result. If in doubt, take a water sample to a pool shop for
testing.
WARNING Chemicals must be carefully diluted according to the size of the pool or spa.
Always add the concentrated chemical to the water and never add the water to the
concentrated chemical. Some chemicals react violently with water and can splash into face
and eyes. Always wear protective face-shield and gloves for such operations. Fully observe all
the chemical manufacturer’s safety instructions when handling pool chemicals.
WARNING Ensure the chemical supplies (liquid Chlorine and pool Acid) are kept in visually
different containers to avoid wrong connection. Use colour or size differences or both. When
these two concentrated chemicals are mixed together out of the pool water, poisonous gas is
produced.
WARNING If it is decided to turn off the Chemigem audible alarm for any reason, the unit
will no longer have that warning capability and the pool owners will have to rely on their own
ability to monitor the indicator lights on the face of the unit to verify that the Chlorine and
pHlevels are within acceptable limits.
SAVE THESE SAFETY INSTRUCTIONS
MESSAGE TO NEW OWNER
Ensure that the Unit Matches the Mains Power
The Chemigem requires a mains supply of 220/250 volts AC
Although the unit has an in-built surge protector, it is recommended that a voltage surge
protection device be fitted to the electricity supply.
Prior to Installation and Operation
It is important that a full water test is carried out with a good quality test kit and that the pool
water is correctly balanced prior to the installation and operation of the Chemigem. The pool
builder often includes the first amounts of chemicals. These are estimated and sometimes
require adjustment.
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Chemigem Installation and Operation
The unit is one of the most advanced pool chemistry controllers of its kind. It is important
that it is installed and operated in accordance with the instructions provided in this manual.
The Chemigem is designed to automatically assist in keeping the levels of Chlorine and pH
correctly balanced in swimming pools and spas. It continuously monitors and adjusts pH and
Chlorine levels required through state of the art solenoid valves, utilising the natural suction
of the pool recirculating pump while the pool pump is running adds Chlorine and pool Acid as
and when required. Stable controlling of the Chlorine and pH levels of the pool water should be
achieved during the first two weeks of operation. During this period, check the level of Chlorine,
Total Alkalinity and pH regularly with a good quality test kit to confirm that the unit is keeping to
the desired levels. The chemical levels are set by the keypads. Once the correct positions have
been set for the pool water they should remain constant and do not have be changed from
season to season (however in winter the pool pump running times can be reduced)
Electronic Clock
The in-built electronic clock requires setting to your local time. To set the clock, (Refer to page
23).
Pool Pump Times
The factory-set pool pump times are on page 23. To change pumping times or to turn the timer
off,(Refer to pages 22&23).
Pool Water Circulation
To enable the Chemigem to work efficiently, the mixing of the pool water has to be as quick
and complete as possible. Positioning the return nozzles (eyeballs) to the pool so that the main
water-body rotates is the best way to achieve this. Under no circumstances should the eyeballs
be positioned to produce opposing circulation patterns. The unit’s multi-electrode (probe)
monitors the Chlorine and pH levels as the water travels towards the pump.
If the mixing of the pool water is slow, the multi-electrode (probe) will not receive the signal
until large amounts of chemicals have been added to the water. When the multi-electrode
(probe) finally receives the signal, the pool water may be overdosed and the excess warnings
will operate.
Heated Pool
If the one pool pump is required to service both the pool heating system and the Chemigem,
the pool heating plumbing must be bypassed. (Refer to pages 12&16)
PREPERATION
ITEMS SUPPLIED
A brief description of the items supplied and the purpose of each item:
Chemigem
The sealed unit is connected to the solenoid valves and assists in keeping the levels of
Chlorine and pH correctly balanced in swimming pools and spas.
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Key features:
• A computerised on-screen HELP menu
• An automatic pool pump timer
• An easy-to-read screen showing chemical settings and actual chemical readings
• Indicator light and audible alarm that monitor whether pool water chemical levels are within
the required range
Multi-Electrode (probe)
The one Multi-Electrode (probe) is fitted into the side arm of the tapping band that is then
clamped around the PVC pipe running from the pool to the pool pump. The one multi-
electrode (probe) monitors both the Chlorine and pH levels. It is mounted into the tapping
band on the inlet (suction) side of the pool pump. Chemical readings obtained by the multi-
electrode (probe) are monitored by the Chemigem, resulting in Chlorine and/or pool Acid
being dosed into the pool water as and when required via the solenoid valves and tapping
band injector nozzle.
Tapping Band
The tapping band is inserted into the PVC pipe on the inlet (suction) side of the pool pump.
The purpose of the tapping band is to house the Multi-Electrode (probe) and to provide an
injector nozzle for chemicals being dosed into the pool water via the solenoid valves.
Solenoid Valves
The solenoid valves contain the only two moving parts in the Chemigem package. The
purpose of the solenoid valves is to control the flow of Chlorine and/or pool Acid from the
chemical drums as and when required and to inject the chemical(s) into the pool water via an
injector nozzle on the tapping band.
Coil of Plastic Tubing
The plastic tubing is connected from the solenoid valves to the chemical drums and the
tapping band.
Filters
There are two types of filter:
• In-Line Filter
• Drum Filter
The In-Line Filters are connected to the plastic tubing for both the Chlorine and pool Acid tube
lines, between the respective chemical drums and the solenoid valves. The Drum Filters are
connected to the plastic tubing. One is placed in the Chlorine drum and the other is placed in
the pool Acid drum.
Sinkers
The Sinkers are fitted above the Drum Filters. The purpose of the sinkers is to provide added
weight to the Drum Filters so that the filters do not float and remain positioned close to the
bottom of the chemical drums.
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Wall Anchors and Screws
There are two wall anchors and screws for the affixing of the unit to a solid surface. Wall
anchors and screws are also supplied to affix the solenoid valves to a solid surface surface.
TOOLS REQUIRED
The following is a list of tools required together with the purpose for each tool:
19mm Hole Saw
To drill a hole in the PVC pipe for the fitting of the tapping band.
A hole saw can be purchased from most hardware stores Spirit Level
For fitting the Chemigem horizontally to a solid surface.
Electric or battery charged drill
For drilling screws to hold the Chemigem and Solenoid valves
Drill Bits
5mm masonry drill bit for wall anchors (Refer to page 9)•
3mm twist drill (for metal sheet or wood fixing)•
10mm drill (for making holes in the lids of chemical drums)•
Knife
For cutting the plastic tubing to required lengths
Screwdriver
For affixing self tapping screws
Tape Measure
To measure for the location of Chemigem components
Wrench
For tightening the tapping band. (Refer to page 10)
OTHER ITEMS REQUIRED
Other items required together with a brief description of the purpose of the items:
Pool Water Test Kit
A good quality test kit is essential for testing the pool water.
The pool water must be tested and balanced before the Chemigem is turned on.
PVC Tape
For use on the chemical drums, solenoid tubing and loose wires.
Protective Face Shield and Gloves
For use when diluting chemicals.
Metal Cover
An optional metal cover can be purchased from the supplier of the Chemigem.
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INSTALLATION
LOCATION
For ease of installation and for safety, the Chemigem must be installed as follows:
In a normal upright position (with the printing on the front reading horizontally) and•
protruding cords facing toward the ground.
Attached to a solid vertical surface to provide easy access to the power supply and should•
preferably be fixed at eye level.
To obtain maximum life for the unit it is recommended that it be located in a sheltered
and shaded position. Should this not be possible, an optional metal cover can be
purchased. (special procedures required for the placement of Chemigem when the
pool pump and filter are located below pool water surface level and when the pool has
a heater unit). Devices such as cell-phones, radios and portable CD players, are capable
of emitting radio waves that may interfere with the correct operation of the Chemigem. Avoid
using these devices within a radius of 5 metres of an operating Chemigem.
POWER CONNECTION
It is important that the Chemigem only operates when the pool pump is running. To ensure
this happens, plug the pool pump into the socket in the base of the Chemigem and then plug
the Chemigem into the power supply. If the Chemigem is left switched on when the pool pump
is off, the Multi Electrode (Probe) will quickly pick up false readings from the non-moving
water and signal warnings until the unit is switched off.
CHEMIGEM INSTALLATION
Position the Chemigem within 3 metres of the tapping band at a convenient height for easy
operation, preferably at eye level. If it is impractical to install the unit at eye level because of
site restrictions, install it at any height above the solenoid valves that provides ease of access
and operation in a normal upright position (with the printing reading horizontally and protruding
cords facing toward the ground). The solenoid valves must be above the height of the
chemical drums.
TAPPING BAND INSTALLATION
Air Leaks
Before commencing the installation of the tapping band, check for air leaks in the
suction line by switching on the pool pump and checking the lint pot. If there are large
quantities of air bubbles swirling around which do not clear within 2 to 3 minutes, it is
likely the system has an air leak in the suction line between the pool and the pool pump.
If a pool-cleaning device is in use, carefully check the flexible hose for small pinholes that
allow the entry of air into the suction line.
INSTALLATION
Turn off the pool pump before commencing the installation of the tapping band. Refer to the
diagrams on pages 12 and 13 showing:
The components to be connected to the PVC pipe.•
The connection of the multi-electrode (probe) to the tapping band.•
The location of the multi-electrode (probe) and tapping band.•
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It is imperative to fit the tapping band to the inlet (suction) side of the pool pump unless using
a venturi system. The required range of pressure/suction is negative 20 kPa to negative 70
kPa. After selecting the position for the tapping band on the pool pump inlet pipe, ensure that
it is as near as possible to the pool pump.
When the Chemigem is working it is essential that the multi-electrode (probe) and
injector nozzle be in a rapidly moving water stream. If not, the unit will display incorrect
and erratic readings and may cause excess additions of concentrated chemicals.
The tapping band can be positioned on either horizontal or vertical pipes, provided the multi-
electrode (probe) is fitted exactly horizontally.
If the multi-electrode (probe) is positioned with the sensor tips aiming downwards it will•
trap air bubbles.
If the multi-electrode (probe) is positioned with the sensor tips aiming upwards it will trap•
dirt or debris.
Both of these positions will cause erratic and false readings of the swimming pool chemical
levels.
Drilling the Tapping Band Holes
Drill a hole using a 19mm hole-saw through both sides of the PVC pipe.•
Ensure the surround to the hole at the “O” ring contact is smooth and clean.•
Fit the tapping band, first checking that the “O” rings are in position and that the arrow on•
the tapping band points toward the pool pump.
Do not use grease or sealing compound on this fitting.
To check the accuracy of the tapping band position look through the multi-electrode (probe)
arm (feel with your finger or use a mirror if the position is inaccessible) making sure the multi-
electrode (probe) is lined up exactly with the holes. Tighten by hand and then give the nuts
half a turn with a wrench. If the tapping band is over tightened it will split.
Inner Shell of Tapping Band
The inner shell of the tapping band is used if the PVC pipe has a 40mm diameter. If 50mm
diameter PVC pipe is used, the inner shell of the tapping band is not required.
MULTI-ELECTRODE (PROBE) INSTALLATION
Remove the multi-electrode (probe) protective cap, before fitting the multi-electrode (probe)•
to the tapping band.
The protective cap should be retained for possible future use.
• Fully insert the multi-electrode (probe) (with “O” ring fitted) into the tapping band and hand
tighten only.
Do not use grease or sealant on this connection to avoid contaminating the sensing
part of the multi-electrode probe.
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SOLENOID VALVE INSTALLATION
The valves must be fitted as near as possible to the tapping band•
The valves must be screwed to a vertical surface above the top of the chemical drums and•
no more than 750mm from the ground so that the pool pump may easily raise the chemicals
from the drums.
To meet special needs, a Venturi system can be connected to the solenoid valves.•
SOLENOID VALVE TUBING INSTALLATION
Connect a length of tubing between the centre nipple on the solenoid valve base and the•
tapping band injector nozzle
Connect a length of tubing to the Chlorine in-line filter and lay it neatly to the Chlorine drum•
Connect a length of tubing to the pool Acid in-line filter and lay it neatly to the pool Acid•
drum
Ensure that the tubing is absolutely clean and free from sand and dirt before fitting, as particles
may enter the valve and cause leakage.
Do not use any tubing other than that supplied. To do so may result in damage to the
Chemigem and negate the Warranty. If additional tubing is required for the installation of the
unit, it will be supplied at no cost.
CHEMICAL DRUMS INSTALLATION
Ensure the Chlorine and pool Acid are kept in visually different drums to avoid wrong
connection. Use colour or size differences, or both.
Refer to the cutaway diagram of chemical drum on page 12 for a presentation of the following:
Position the Chlorine and Acid drums in a safe and secure location about 2 metres from the•
Chemigem.
Drill a 10mm hole in each of the screw-on drum caps (slightly larger than the diameter•
of the tubing) to allow venting and to prevent the drum walls from being sucked in as the
chemicals are used.
Pass each length of supplied tubing through the hole in the appropriate drum cap.•
Place the supplied sinkers onto the tubing and attach the appropriate drum filter.•
When placing the tubing into the drums, measure the tubing against the outside of each•
drum so that the drum filter will be 10-15mm above the bottom of the drum and then apply
several turns of PVC tape at a point above the cap to prevent the tubing from slipping
further into the drum.
Lower the drum filter and sinker into the drum and screw on the cap.•
FITTING CHEMIGEM TO A HEATED POOL
If the pool heating system is controlled by a separate pool pump, there are no factors that
affect the installation of a Chemigem. If the one pool pump is required to service both the pool
heating system and the Chemigem, the pool heating plumbing must be bypassed. This will
necessitate the installation of a Venturi system at an additional cost.
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FITTING CHEMIGEM BELOW POOL WATER SURFACE LEVEL
The following instructions assume the installer has some knowledge of the operation
of the pool and the parts described. If the installer is not experienced in pool operation
and maintenance, contact the supplier of the Chemigem or a qualified pool maintenance
technician with any questions before attempting to carry out the steps described in this
section.
The Chemigem must be installed within 3 metres of the tapping band and in an upright
position and attached to a solid vertical surface, preferably at eye level. If it is impractical
to install the unit at eye level because of site restrictions, install it at any height above the
solenoid valves that provides ease of access and operation. The solenoid valves need to be
above the height of the chemical drums.
When the pool pump and filter are fitted below the pool water surface level, the suction line
may be under positive pressure even with the pump running. In this case an isolating valve
must be fitted to enable the pump and filter to be serviced.
Fit the tapping band between the isolating valve and the pool pump and close the isolating
valve sufficiently to obtain the required suction so as to allow the unit to operate effectively.
The required suction range is negative 20kPa to negative 70 kPa when the pool pump is
running and the filter is clean.
Methods to obtain improved suction involve using venturi devices or orifice plates. Contact the
supplier of the Chemigem or a qualified pool maintenance technician for information on these.
If the pool pump is more than one metre below the pool water surface it is essential
to fit Non Return Valves into the chemical supply tubing to prevent back-flow into the
chemical drums.
Failure to prevent the back-flow into the chemical drums would cause spillage from the drums,
which in turn may result in the two concentrated chemicals mixing together out of the pool
water and producing poisonous chlorine gas. In addition, there is the serious possibility of
personal injury from contact with the chemicals and breathing the fumes.
VENTURI SYSTEM
A venturi system is required for:
Special needs, such as fitting a Chemigem below the pool water surface level.•
Pools that are heated.•
Pool Controls provides information on the installation procedure for a venturi system.
Pool Controls provides the venturi system at an additional cost.
NEATENING UP
Finish the installation by taping all loose wires and tubing together and place off the ground to
prevent damage and possible electrical shorting.
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INSTALLATION DIAGRAM
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DRILLING TAPPING BAND HOLES
TAPPING BAND AND MULTI-ELECTRODE (PROBE)
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FITTING CHEMIGEM BELOW POOL WATER SURFACE LEVEL FITTING
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CHEMIGEM WHEN HEATER IS IN CIRCULATION, USING VENTURI INJECTOR
DEVICE
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OPERATION
INTRODUCTION
The Chemigem is designed for use with all types of pools and to measure and automatically
adjust the Chlorine and pH levels in the pool water.
Once levels are finally set or adjusted, the unit should be left alone.
The unit has been factory-set to achieve 650 millivolts Chlorine (ORP) and 7.7pH .
It has been found that if ORP is maintained at 650 millivolts, the kill time of E-coli type
bacteria is about one second.
If the ORP is lowered to 550 millivolts, the same organisms could take up to 2 hours to be
eliminated.
If the unit is used with these factory-set points as the selected levels, it should obtain
approximately 2-4 ppm Chlorine and 7.7 pH, providing the stabilizer level is at 50 ppm. If the
stabiliser level is 30 ppm or less, the Chlorine will be around 1 ppm.
READING THE DISPLAY PANEL
ENIROLHC056TES006
(ORP)
Hp7.7TES2.7
What do the Chlorine and pH Numbers Represent?
The Chlorine (ORP) number is the activity of the chlorine (see explanation of ORP (Below)
and measures in millivolts.
The pH number is the measure of acid / alkalinity and is displayed in units of the pH scale.
What is ORP?
The Chemigem is designed to measure and automatically adjust Chlorine (ORP) and pH
levels in the pool water. (Refer above). As an explanation of what ORP is, the following is
provided:
For over 20 years operators in many parts of the world have used Oxidation-Reduction-
Potential (ORP or REDOX) values as a measure of Chlorine activity in water. ORP is a
measure of the oxidising properties of the Chlorine in the water and is easily monitored by the
Chemigem multi-electrode (probe).
When the multi-electrode (probe) is placed into water containing Chlorine it behaves like an
electric cell and creates a small but measurable electric voltage. This voltage is proportional to
the activity of Chlorine in the water.
It has been found that if ORP is maintained at 650 millivolts, the kill time of E-coli type
bacteria is about one second. If the ORP is lowered to 550 millivolts, the same organisms
could take up to 2 hours to be eliminated.
The test kit will measure Chlorine as parts per million (ppm) but the activity level of the
Chlorine (and therefore the kill-time) depends upon the other materials dissolved in the pool
water.
For an ORP controller to work properly the pH, Total Dissolved Solids (TDS), stabiliser (iso
cyanuric acid) and calcium hardness must be maintained within the recommended levels.
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Left Hand Side of Display Screen
The numbers on the left hand side of the display screen are the values the multi-electrode
(probe) is registering for the actual levels of Chlorine and pH within the pool water.
The Chemigem will work to achieve the same values as those “SET” on the right-hand end of
the display.
Right-Hand Side of Display Screen
The numbers on the right-hand side of the display screen are the values “SET”. The unit has
been factory-set to achieve 650 millivolts Chlorine (ORP) and 7.7pH as the preferred levels for
Chlorine and pH respectively. These settings may be raised or lowered using the keypads No.
7 and 8 for pH and 9 and 0 for Chlorine (ORP) to the right of the display screen.
Password
The Chemigem is protected by a password No. 549
The number will only be required when operating any of the function changing keypads if the
programme has been activated.
Alternative Display
The Chemigem is able to display the operation in pictorial form if preferred. To change to this
form of display or to change back again, carry out the following steps:
With the unit running, obtain MAIN MENU by pressing keypad No. 4.
Press keypad No. 6 to move the flashing symbol over to NEXT
Press keypad No. 4
Press keypad No. 6 again to make DISP flash
Press keypad No. 4 once more
BEFORE STARTING THE CHEMIGEM
Before switching on the Chemigem carry out a full water test with a good quality test kit
and balance the pool water to the levels shown below.
If the pool water is not balanced when the unit is first turned on, the unit may fail to
correctly control the pool water.
Calcium Hardness, Total Alkalinity and pH should be adjusted first, followed by Chlorine
and then Stabiliser (lso-cyanuric acid).
Initial set up by the pool builder often includes the addition of the first amounts of chemicals.
These may be estimated amounts and may require adjustment.
Adding chemicals will take only a few minutes but removing the chemicals depends upon•
the natural dissipation from the pool, which could take weeks.
pH is lowered by the addition of acid.•
Do not overdose the pool with Chlorine, pool Acid or Stabiliser.•
Always add the various pool chemicals slowly and with care, allowing sufficient time for•
complete dissolving and mixing throughout the pool water.
Finally, carry out careful water tests to determine whether the correct amounts have been•
added.
If unsure how to carry out a water test and/or initially balance the pool water, request a
qualified pool maintenance technician to do this for you.
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It is suggested that swimming pool water should be maintained within the following ranges
and that these ranges are confirmed with your local authorities as meeting their standards:
CHLORINE 1.0 to 3.0 ppm or 3.0 mg/l•
pH 7.2 to 7.8•
CALCIUM HARDNESS 90 to 300 ppm or 300 mg/l•
STABILISER 30 to 50 ppm or 50 mg/l•
TOTAL ALKALINITY 80 to 300 ppm or 300 mg/l•
TOTAL DlSSOLVED SOLlDS (TDS) 300 to 1500 ppm or1500 mg/l•
Pay particular attention to the instructions on the chemical drums. Add each chemical
separately and slowly allowing plenty of time for them to dissolve. Always test between
additions with a good quality test kit.
When diluting chemicals always add the concentrated chemical substance to the water and
never add the water to the concentrated chemical. Some chemicals react violently with water
and can splash into the face and eyes. Always wear a protective face shield and gloves for
such operations.
After the pool water has been correctly balanced and the unit is switched on, it will measure
and automatically adjust the Chlorine and pH levels. Chlorine and pool Acid will feed
separately for a few seconds approximately every 3 minutes until the required levels are
reached - depending on how the unit has been programmed.
ELECTRONIC CLOCK
The Chemigem has an in-built electronic clock with a battery back up (which should last for
several years) that controls the automatic switching on and off of the pool pump.
DOSING OF CHEMICALS
Dosing of chemicals will only commence after a few minutes to allow for adequate mixing and
accurate sensing. Similarly the safety warning sounds and alarm signals will not operate for
the first 5 minutes. Every 3 minutes Chlorine will feed for 8 seconds and then pool Acid will
feed separately for 7 seconds, until the required chemical levels are reached - depending on
how the unit has been programmed.
Depending upon how the unit has been programmed, the standard procedure is that the
first time that the unit operates it will take approximately 120 minutes to fully adjust to the
required levels of Chlorine and pH. Thereafter it will normally restore the required levels in
approximately 30 minutes. Ensure that the pool pump is running for a sufficient period to carry
out these adjustments.
THE FIRST TWO WEEKS
The day following the installation of the Chemigem and after the pool pump has been running
for 30 minutes, check the level of Chlorine and pH with a good quality test kit. If either of the
levels is not exactly at the levels required, alter the settings a little. The unit will bring about
the changes to the chemistry of the pool water as the pool pump circulates the water.
During the two weeks after a pool is first filled, the water chemistry will be settling down.
It is likely that chemical levels will fluctuate during this time, so keep a check on the pool
water with a good quality test kit or obtain confirmation by seeking help from a qualified pool
maintenance technician.
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It is not uncommon for new plaster/marblesheen pools to use more acid during their first
month or two but do not let the pH and Total Alkalinity remain below recommended levels, or
the lifetime of the pool surface may be shortened. Depending upon how the unit has been
programmed, the standard procedure is that the first time that the unit operates it will take
approximately 120 minutes to fully adjust to the required levels of Chlorine and pH. Thereafter
it will normally restore the required levels in approximately 30 minutes.
Ensure that the pool pump is running for a sufficient period to carry out these
adjustments.
If the actual chemical levels being achieved by the unit are not closely matching the “SET”
levels, make minor adjustments (either up or down as the circumstances warrant) to the “SET”
levels and re-test after 24 hours.
Additions by the unit are made in minutes, but removing excess chemicals may be difficult and
require weeks.
Do not go outside the ranges given and pay attention to any specific requirements given by the
pool builder.
Always take samples at a point near the skimmer box, for this is where the water is completely
mixed giving the most accurate readings, never near the pool returns (eyeballs) where the
water may have been freshly dosed by the unit.
Always follow the specific requirements of the pool builder when setting the chemical levels for
the pool.
REGULAR CHECKS ON THE QUALITY OF POOL WATER
As a precautionary measure to ensure that the desired pool water chemical levels are being
maintained and that the Chemigem is functioning correctly, regularly check the pool water
quality with a good quality test kit.
If the pool is heavily used (such as in hot weather) it must be checked more frequently. As a
general guide it is recommended that the check should be made at least twice weekly in the
swimming season and once each two weeks in the non-swimming period. Seek guidance from
your local authority or qualified pool maintenance technician.
REGULAR CHECKS OF THE SOLENOID VALVE TUBING
Regularly check the solenoid valve tubing to ensure that it has not become brittle.
If the solenoid valve tubing becomes brittle, it must be replaced immediately.
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KEYPADS
KEYPAD No. 1:
“PUMP”
When the power has been switched on the screen will light up, however the pool pump will not
operate unless the time is within a “PUMP-ON” period.
This keypad controls the operation of the pool pump and the controlling function of the unit. It
has three positions and scrolls through them with each press on the keypad.
The first press will move the pump status from• “AUTO” to “ON” and the pool pump will
then run for one hour. The screen will show a message to confirm this.
Pressing the keypad again will move the pump status to• “OFF” and the screen will confirm
this.
With a third press the pump status will return to• “AUTO” and the timer will then switch the
pump on and off according to the times set.
Dosing of chemicals will only commence after a few minutes to allow for adequate mixing and
accurate monitoring. Similarly the safety warning sounds and alarm signals will not operate for
the first 5 minutes.
Should a manual “ON-TIME” longer than 1 hour be required, proceed as follows:
Press• “PUMP” keypad No. 1 a few times until the screen message states that the pump is
operating under “AUTOMATIC TIMER”
Press once more and hold down continuously keypad No. 1 until the required “ON-TIME” in•
hours is displayed on the screen.
The unit will then operate for that number of hours and when all manually set times have
expired the unit will automatically return to “AUTOMATIC TIMER” to switch on and off the pool
pump.
If the Chemigem inbuilt pool pump timer is disabled by the pool operator, the unit will lose the
ability to turn the pool pump on manually with the “PUMP” keypad. To turn the pool pump on or
off manually when the timer has been disabled, use the mains power switch.
To reinstate the inbuilt timer, set “AUTOMATIC PUMP TIMES”
KEYPAD No. 2:
“ESCAPE” AND “ALARM MUTE”
The keypad has three functions: -
When the setup of the Chemigem is completed or required changes made, pressing the•
ESC keypad will return to normal display.
When alarms are sounding it can be pressed to mute the warning tone. The warning tone•
will be restored when the unit next switches on.
The flashing red light remains on until the pool chemistry returns to the preset levels.•
Removes lock-out associated with high pH alarm.•
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