Rinnai HD200e Installationshandbuch PDF herunterladen (Seite 29)

Rinnai Australia 26 Operation / Installation Manual

Ringmain Pump

• These are used for circulating water around the building. They are normally left on or may have

a time clock to switch it off at night when the building is not in use.

• These pumps do not pressurise the system.

• They must have a non return valve.

• Swing non return valves must be horizontal or upward as the rely on gravity to close the

valve.

• Spring check valves can be located on any plane but may contribute excessive back

pressure and restrict the pump flow rate.

• Return water should only be slightly cooler than water leaving the tank. If the temperature drop

around the circuit is too high it may indicate that the ring main pump flow rate is not high enough

and indicates a design fault or a blockage in the pipework (or poor pipework insulation).

Investigate valves and operation of pump (same procedure as primary pump).

Service

Rinnai recommend that all commercial water heater installations have a service arrangement.

Annual services are recommended at a minimum. Refer to the back cover for contact information.

INSTALLATION HAND OVER MANUAL

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Rinnai HD200e Installationshandbuch Seite 29