Bristan Gummers H64WMT 설치, 운영 및 유지보수 지침 - 페이지 4

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Calibration

Due to variations in supply parameters from those used to set and test the

products in our factory the outlet temperature will require resetting on site. The

temperature will need to be set between 39ºC and 41ºC in order to comply with

TMV3 approval this is done by fully opening the valve, using a thin blade

remove the indice holder (45) with indice (46) still attached. Then inserting a

2.5mm hexagon wrench into the adjusting screw (32) and turning the screw

clockwise for a cooler temperature and anti clockwise for a warmer temperature

see Fig 1

Fig 1

Operation

The unit has a single control lever that turns the unit on and off and adjusts the

temperature. Turning the handle anti clockwise from the off position firstly gives

cold water flow then increases the temperature to the maximum set value.

Maintenance

This product is designed to be easily serviced, it has integral isolation, integral

hot water flushing to pasteurise the mixed water chambers reducing the

incidence bio film growth and unions that allow the complete body to be

removed for servicing in the workshop.

Isolating and removal of the valve

The valve has integral isolation this is accessed by unscrewing the shroud (13)

and pulling it back along the elbow taking care not to scratch the chrome, the

2.5mm hexagon wrench is inserted in the isolating plug (6) and rotating it

clockwise until it locks. The securing nut (14) is then removed whilst supporting

the valve to stop it falling and damaging the surface below it. The valve can then

be replaced or serviced as is most convenient. The valve is replaced by reversing

the above procedure ensuring the O-ring is undamaged and in place.

Insert isolator

and turn

Fig 2

The purpose of this section is to ensure the valve is adjusted correctly for the

system in use.

The supply pressures and temperatures should be checked to ensure they are

within the requirements of DO8 and the flow limiters set as per the above table

The fitting should be run for several minutes until the mixed water and incoming

water temperatures have stabilised, the mixed water temperature should be

adjusted as per the calibration section above,

The cold water to the fitting should be isolated the mixed water flow should

reduce to a drip or small run, the cold water reinstated and the temperature

should recover close to the original temperature.

The following information should be recorded

a) The temperature of incoming supplies.

b) The temperature of mixed water outlet under normal running.

c) The temperature of any residual flow after cold isolation.

d) The temperature of mixed water outlet under normal running after

isolation.

e) Record the identity of all instruments used.

The thermostatic mixing valve (TMV) will be installed in such a position that

maintenance of the TMV and its valves, and the commissioning and testing of

the TMV can be undertaken

The fitting of isolation valves is required as close as is practical to the water

supply inlets of the thermostatic mixing valve.