How do you commission a Thermostatic Mixing Valve (TMV)?

It is essential for a Thermostatic Mixing Valve to be serviced and re-commissioned in every system to allow safe start-up, and to ensure water remains clean for drinking, cleaning, cooking, and other activities that it may be needed for.
Technical Manager, Ed Morris, covers how to easily commission a TMV to keep it working efficiently and keep the end-user safe.

[@jimmyman8031]

Aren’t there any filters that need checking???

[@drdriedger3429]

I am in Canada. I am not familiar with the word 'commission' , as you use it. We would say service, or maintain.

[@raymondtavener9797]

It is servicing or planned preventative maintenance he should of used. Also he forgot to mention to descale all parts including the strainers on each side. Also to record the incoming cold and hot water temperature going to the TMV’s and adjust the mixed temperature of required. You should also do a fail safe test which consists of isolating the cold and making sure the tap don’t run with just the hot coming out if so it will need replacing.

[@mitch19636]

Hi Mate; COMMISSIONING OF THE VALVE Upon completion of the installation, the valve should be tested and commissioned as per the procedure outlined below or as specified by the local authority. The entire procedure should be read through thoroughly before the commissioning of the valve. A calibrated digital thermometer with rapid response time with maximum temperature hold, a small flat-bladed screwdriver, 3mm Allen key and the adjusting key (supplied with the Aquablend 1500) will be required to check and set the outlet mixed temperature of the valve. Ensure all outlets that will be serviced by the valve have adequate warning signs posted to ensure that no outlet is used during commissioning. Open the cold supply line to the valve, then open the hot supply line, ensuring there are no leaks. Open the outlet that is serviced by the shortest length of the pipe work between the mixing valve and outlet fixture. Allow the mixed outlet to flow for at least 60 seconds to allow the temperature to stabilise before taking a temperature reading at the outlet with a digital thermometer. The flow rate should be at least 2L/min. The flow rate can be checked with the aid of a known size container and a stopwatch, or Enware Flow-Cup (ATMS1201). The temperature should be taken at the closest outlet served by the thermostatic mixing valve. If the outlet temperature requires adjustment please follow the steps below. TEMPERATURE ADJUSTMENT 1. Using a small flat-bladed screwdriver, lever the Red Lock Shield (protective cover) off the valve. SEE IMAGE 5 (over page) 2. Loosen the temperature adjustment locking grub screw located on the hex of the top cap using 3mm Allen Key. SEE IMAGE 6 If the grub screw is not easily accessible, relocate the grub screw to the most accessible screw hole (3 screw holes are provided on the top cap for convenience). Leave the grub screw loose. 3. Fit the supplied key over the adjusting spindle. SEE IMAGE 7 • To increase the mixed outlet temperature, rotate the spindle anti-clockwise. • To decrease the mixed outlet temperature, rotate the spindle clockwise 4. Allow the mixed outlet temperature to stabilize for 60 seconds and once again take a temperature reading. Repeat the procedure until the desired temperature has been reached. 5. Tighten the temperature adjustment locking grub screw. SEE IMAGE 6 6. Push the top cover firmly back onto the top of the valve until it ‘snaps’ back into place. 7. Check the outlet temperature is stable over the full range of flow rates and that the flow rate is adequate for the application. 8. Close the outlet. 9. The mixing valve is now set and locked! Full instructions here: www.enware.com.au/products/aquablend-1500-thermostatic-mixing-valve-lead-free-with-thermal-flush-lift-lever/aquablend-1500-thermostatic-mixing-valve-lead-free-with-thermal-flush-lift-lever/

[@hiitdon8630]

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