Ring Main Pump; Service - Rinnai MP2200 Operation & Installation Manual

RING MAIN PUMP

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Pump can be continuously operating on or may have a time clock to switch it off at night when the building
is not in use.
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These pumps do not necessarily pressurise the system.
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They must have a non return valve
(a) Swing non return valves must be horizontal or upward as they rely on gravity to close the valve.
(b) Spring check valves can be located on any plane but may contribute excessive back pressure and restrict
the pump flow rate.
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Return water should only be slightly cooler than water leaving the system. If the temperature drop around
the circuit is too high it may indicate that the ring main 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.

SERVICE

Rinnai has a service and spare parts network with personnel who are fully trained and equipped to provide the best
service on Rinnai appliances. If your appliance requires servicing, please call our National Help Line.
Rinnai recommends that all commercial water heater installations have a service arrangement.
Annual services are recommended at a minimum.
Rinnai 19
FAULT FINDING
Commercial Manifold Pack OIM