Culligan MC405 Operating Manual Download Page 5

1. Before you begin

The installation of your new water softener is relatively straightforward. However, we 
would recommend that either a qualified plumber or a person with relevant plumbing 
experience carries out the installation.

Before embarking on the installation, please ensure you have familiarised yourself with 
both these instructions and the components required to complete the installation.

2. Positioning the water softener

Please measure your water softener to ensure that it will fit into the area you are placing 
the unit into. PLEASE remember to include additional space for connecting pipe work in 
your calculations along with the regular access that is needed for topping the unit up with 
salt and future service.

Where possible, the distance of both the incoming water supply and nearest drain should 
be kept to a minimum. Two metres is an ideal distance, however, longer distances are 
permissible, dependant on the incoming water pressure.

Please remember the weight of your new water softener will considerably increase once 
installed and filled with salt. Therefore, please ensure your chosen location is strong 
enough to support an approximate total weight of 50 Kg.

Your new water softener has been designed to operate efficiently and effectively with an 
incoming water pressure of between 1.7 to 5 BAR.

 If your water supply is likely to fall 

outside these limits, then we would recommend that a booster pump or pressure-

limiting valve should be fitted respectively.

PLEASE NOTE:

 UK Water Regulation guidelines on the installation of water softeners 

indicate that a minimum of one tap is left as a source of untreated water / drinking water 
within the home. It is also recommended that any garden taps should also be left 
untreated. 

INSTALLATION AND 

OPERATING CONSIDERATIONS

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Important - do not 

install the water softener where it, or its connections (including the 

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drain overflow lines) will be subject to temperatures under 0 C  or above 49 C.

The water softener should be installed within a container of not less than100 litre 
capacity, to which there should be connected an overflow pipe of not less than 20mm 
diameter. The overflow should be connected at the bottom of the container and not less 
than 150mm below the height of any electrical components mounted on the water 
softener. It is recommended that an anti vacuum valve be fitted to the inlet pipework 
supplying the water softener.

3.  L o f t   i n s t a l l at i o n

If you are planning to install the water softener above ground level e.g. In the loft, 

the following instructions should be strictly adhered to.

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4. Plumbing systems

5. Backflow prevention device

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Your water softener installation must include at least one drinking water tap that is not 
fed by the water softener. 

It is recommended that individuals on a low sodium diet should follow the Department of 
Health's advice that water from a domestic water softener should not be used for 
drinking or cooking. Softened water contains a small amount of sodium, it has been 
calculated that 1 pint of softened water contains a similar amount of sodium as two slices 
of white bread or ¼ pint of milk.

Water that is used for mixing powdered milk for babies must only be taken from an un-
softened mains tap as some powdered milks and softened water both contain sodium for 
which young babies have a limited tolerance.

6. Drinking water

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There are several types of plumbing systems in common use:

For 15mm pipework (e.g.Static Head systems) 

The water softener is supplied with a high 

flow installation kit and flexible high flow hoses suitable for 22mm pipework, for 15mm 
pipework use the reducing bushes supplied with the kit, (see diagram on page 6).

For 22mm pipework (e.g.Combination Boilers or Unvented Fully Pressurised systems)

We recommend using the standard high flow installation kit and that your water softener 
be “hard plumbed” using copper tube or the flexible high flow hoses supplied with your 
softener.

INSTALLATION AND 

OPERATING CONSIDERATIONS

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When fitted to the supply feeding a single dwelling, a check valve complying with BS6282 
Part 1 must be fitted on the cold water feed prior to the installation. All other types of 
installation require the fitting of a double check valve.

Summary of Contents for MC405

Page 1: ...the softening process 4 5 Installation and operating considerations 6 Installation layout PART TWO 7 8 Installing your water softener 9 Water hardness test Programming procedure 10 PART THREE Troubles...

Page 2: ...system design is based on the extensive experience of Culligan in the UK Rotary valve means less moving parts for greater reliability Flow rates suitable for use on conventional and modern plumbing s...

Page 3: ...Soft water Water inlet To drain Brine pick up Rinse water to drain Hard water SOFTENING CYCLE REGENERATION CYLCE RINSING CYCLE Periodically these resin beads are automatically cleaned and regenerated...

Page 4: ...sible dependant on the incoming water pressure Please remember the weight of your new water softener will considerably increase once installed and filled with salt Therefore please ensure your chosen...

Page 5: ...unt of sodium it has been calculated that 1 pint of softened water contains a similar amount of sodium as two slices of white bread or pint of milk Water that is used for mixing powdered milk for babi...

Page 6: ...bush for 15mm pipework Key to the diagram A Non return valve B Pressure reducing valve where required C Inlet valve D Bypass valve E Outlet valve 6 PART ONE A B C E D Mains stop valve Drinking water...

Page 7: ...the valve will confirm the direction of flow Connections can be made with either conventional copper tube and fittings or the high flow flexible hoses supplied ensure hoses are not kinked as this may...

Page 8: ...from your local Waterside dealer 7 Blending control 6 Filling the brine cabinet salt usage and salt alarm All machines are factory set to produce water that is soft If you prefer water which is less...

Page 9: ...ne with water from a hard water tap Add the tablets to the solution one tablet at a time Shake the bottle in between and keep adding tablets to the water until the solution turns from wine red to blue...

Page 10: ...h a value of 300 parts per million of hardness minerals keys to adjust the setting to match that of the one you obtained identified earlier See page 9 for details Pressing the set key once enters the...

Page 11: ...ed Remember to check the salt level in the brine cabinet weekly 11 PART H EE T R cc bs OR Fig4 4 SETTING THE TYPE OF SALT USED see Fig4 To operate effectively your water softener must be set to the ty...

Page 12: ...within the specified operational parameters the water level should not reach the overflow connection If however an overflow situation occurs please refer to the troubleshooting section on page 13 to d...

Page 13: ...BRINE CABINET REACHES OVERFLOW Is the line pressure within the specification of the water softener Connect a pressure gauge to a water outlet and check the pressure is between 1 7 5 0 bar 7 1 Pressure...

Page 14: ...e If yes this is normal wait until the recharge is complete 3 There should be no flow to drain in the service position Isolate the softener and call for service 9 9 PROBLEM EXCESSIVE SALT USAGE Check...

Page 15: ...CATION TABLE MC450 MC550 50 50 30 35 24 28 10 10 1 4 2 2 5 5 1 7 1 7 49 49 5 5 230 230 12 12 3 4 3 4 1 2 1 2 Model Maximum peak flow rate L min Maximum continious flow rate L min Basic flow rate flow...

Page 16: ...or it representatives Any defect caused by malicious or wilful action negligence misuse or third part interference Any defect or damage occasioned by fire lightening explosion flood storm frost impact...

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