Methven Kaha Concealed Thermostatic Mixer With Integral Diverter (2 Outlets) - Manual (Page 4)

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4. If the maximum temperature requires adjusting . Remove the Temperature control knob (3) and adjust
the Thermostatic mixing valve spindle.
To increase the outlet temperature , Slowly turn the spindle of the anti-clockwise
To decrease the outlet temperature , Slowly turn the spindle of the clockwise
5. When the desired temperature is achieved. Refit and secure the Thermostatic mixing valve control
knob (3) lining up the pin in the Knob with the Temperature stop ring(12).
6. Turn off the Shower valve.
Parts Reference Drawing
Installing the Product
When installing the assembly into the wall cavity , for ease of installation and maintenance you should aim to
keep the access hole as large as possible whilst ensuring there will still be enough room to be able to create
a suitable contact between the wall and concealing plate using a suitable silicon sealant to create a water tight
joint between the wall and concealing plate.
This product has been designed to fit in a cavity with a minimum depth of 60mm. For deeper cavities you may
need to create a suitable mounting bracket in the cavity to securely mount the valve assembly. We recommend
a mounting depth of between 60/67mm from the front face of the tiles. Failure to take this into account will mean
that the concealing plate will not be able to be fixed onto the valve assembly. Refer to Page 7 ‘Line drawing’.
1. Ensure that both the Hot and Cold mains water supplies are isolated.
2. Fix the shower valve assembly into the wall cavity ensuring the thermostatic mixing valve is at the
bottom and the diverter assembly is at the top. If done correctly the ‘Hot’ inlet port to the Thermostatic
mixing valve will be at the bottom of the valve assembly to the left hand side,
3. Connect the respective Hot and Cold water supplies to the Hot and Cold inlet ports of the Thermostatic
mixing valve making sure that all seals, filters olives are fitted and joints sufficiently tightened.
4. Connect the Left hand Diverter outlet to one of your outlets and the right hand Diverter outlet to the
remaining outlet connection.
Important : Before fitting the concealing plate it is essential that all joints are checked for leaks. Failure to do
so could result in flooding or water damage within the cavity over a long period of time that may
not be immediately evident. Therefore :-
5. Secure the Diverter knob (2) to the Diverter assembly (31).
6. Secure the Temperature control knob to the Thermostatic mixing valve (32). To secure the Temperature
knob in the correct position . Please refer to ‘Maximum temperature setting and adjustment’.
7. Ensuring all joints have been secured and tightened , Turn on both Hot and Cold water supplies.
8. Turn the diverter knob towards the side connected to one of the connected outlets.
9. Taking care , Turn the Thermostatic mixing valve on. Whilst water should now be flowing through the outlet,
check all joints for signs of leaks . Turn off the Thermostatic mixing valve and repeat the process for the
remaining connected outlet . Any leaking joints should be immediately rectified. It may be a good idea to
leave the shower running for several minutes to ensure the joints are water tight and no leaks appear.
10. When you are confident that all joints are watertight. Turn off the thermostatic mixing valve.
11. Remove both the Thermostatic mixing valve and Diverter control knobs (Take note which position the
Diverter was set too , as this is the position the Diverter knob will need to be fitted after fitting the
concealing plate).
12. Ensuring correct orientation, Fit the concealing plate (28) to the valve assembly. When fitting the
concealing plate , a suitable sealant should be used to create a waterproof joint between the concealing
plate and wall.
13. Refit and secure the Diverter control knob to the position it was removed in point 11.above.
14. To refit the Thermostatic mixing valve temperature knob , Please refer to ‘Maximum temperature
setting and adjustment’.
Maximum Temperature Setting and Adjustment
Whilst the Temperature of your Thermostatic mixing valve has been factory tested and calibrated, you will
need to perform a slight initial adjustment to suit your system operating setup. To do so :-
1. Loosely fit the Thermostatic mixing valve control knob (3) to the Thermostatic mixing valve. Note, whilst
fitting the Knob, there is a Temperature stop pin (17) inside the knob which is required to line up with the
Temperature stop ring (12).
2. Taking extreme care, Slowly turn on the Thermostatic mixing valve and gently rotate the control knob
to the maximum temperature position. Let the shower run for several minutes to ensure the correct
blend of Hot and Cold water and the maximum outlet hot water temperature has been achieved.
It is Important to note at this stage, very hot water MAY flow through either outlet depending on
where the diverter is set too and can cause serious burns if care is not taken !!!.
3. Take note of the outlet temperature of the shower using a suitable testing equipment.
Part Code Description Part Code Description
1 00105055 Valve Body 19 00510133 Nut
2 00141771 Diverter Handle body 20 00511135 Nut
3 00142539 Temperature Handle Body 21 00511137 Olive
4 00400014 O' Ring 22 00511258 Connector
5 00400015 O' Ring 23 00512105 Blanking Plug
6 00400246 Filter Washer 24 00512119 Connector
7 00400380 O' Ring 25 00514592 Connector
8 00400648 O' Ring 26 00515537 Shroud
9 00411240 Spline Adaptor 27 00515826 Adaptor
10 00410544 Handle Cap 28 00550725 Plate
11 00517299 Temperature Over ride Button / Peg 29 00601113 Pair of Fixing Screws and Plugs
12 00410903 Temperature Stop Ring 30 00603719 Check Valve
13 00411171 Plastic Spacer 31 00604189 Diverter Assembly
14 00411243 Flow Regulator 7 l/min LP 32 00650492 Thermostatic Cartridge
15 00500219 Grub Screw 33 00940006 Seating Ring
16 00500749 Spring 34 00514320 Peg for Diverter Handle
17 00500630 Temperature Stop Pin 35 00400270 O' Ring
18 00500700 Grub Screw