Xylem MOH2 Multi zone mixing module (obsolete) Manual de usuario descargar pdf (Pagina 14)

Installation and operation manual MOH2

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Filling the system

Preparation

• Close the ball valves 10 and 11 at the boiler feed and return of the

MOH2 mixing module.

• Open the feed valve and return flow adjuster of the left most floor heating

loop directly adjacent to the fill- and drain valves 12 and 13

• Close the feed valves and return flow adjusters of all other floor heating

loops.

Filling of the boiler loop

• Fill the boiler loop as usual. No special precautions are necessary.

Filling of floor heating loops

• Connect the fill hose to the upper fill valve 12.

• Connect the drain hose to the lower drain valve 13.

• In this way, the built in check valve 7 at the floor heating feed side will

close and the water will run through the floor heating loops.

• Flush the first loop until it is completely free of air.

• Close the first loop and open the next loop going from left to right.

Repeat until all loops have been flushed.

After filling

• Open the valves 10 and 11 of the boiler loop

• Open all floor heating loops

Verification of proper filling

• Shut down the heating system or set the boiler temperature to ambient

• Switch on the boiler circulator and the circulator of the mixing module

• Open the control valve. Remove the valve cover to do so if necessary.

• You should hear very few air noises, which should get less over time.

• If the air noises do not decrease but persist or even increase, is

necessary to repeat the air purging as described above.

Pressure test

Preparation

• Open all feed valves of the floor heating loops.

• Close the ball valves 10 and 11 [which connect the module to the boiler

loop]

• Close all return flow adjusters of the floor heating loops.

• Connect the pressure hose to the fill valve 12.

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Xylem MOH2 Multi zone mixing module (obsolete) Manual de usuario Pagina 14