MPI Technologies FCX manual $75&,5&8,7&211&7,216, Rlohu, 3UHVVXUHJDXJH, Wlrqflufxlw, Vwhp

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Water circuit connections are made in the back of the unit utilizing the four 1" male pipe thread cou- plings provided. Model FCX can be connected to va- rious comfort heating water systems as well as to a domestic hot water heating system if desired, obser- ving that:

•Water circulating pumps provided in the va- rious circuits must be large enough for each circuit including the pressure drop of the boiler/ condenser in the unit. For optimum sound level and power consumption, set the circulator to the speed that is appropriate for the installation flow rate and pressure drop.

•Isolation valves may be used in the various cir- cuits to facilitate boiler maintenance without having to completely drain each circuit. NE- VER place an isolation valve between a pres- sure relief device and a water tank.

•An expansion tank must be provided in the system to support an expansion of 6 % of the total water capacity of all the circuits employed.

•Safety pressure relief valve must be connected to the drain.

•The water pressure gauge (not supplied) has to be fitted outside the unit.

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