Rinnai MP2200 Operation & Installation Manual page 14

INSTALLATION
Cold Water Supply:
•
Cold water pipe work to inlet of MP, including required valves as shown above to comply with AS/NZS 3500
and local regulations. Non return valve not required for deadleg installations.
•
Maximum cold water inlet pressure to Manifold Pack is 1000kPa. Fit pressure limiting valve if required.
•
When a Ring Main pump is included ensure cold water inlet pressure does not exceed maximum pump
rating. This is usually mains pressure plus pump head pressure (eg: 750 kPa mains +250 kPa pump head
pressure =1000kPa).
Hot Water Outlet
•
Ensure adequate insulation / lagging is fitted to hot water pipe to minimise heat loss.
Ring Main Pump
•
A secondary or building return pump may be installed in conjunction with the Rinnai Manifold Pack hot water
system. Contact Rinnai Commercial to select this pump as duty is critical to temperature stability when there
is no building flow. Pump must have a check valve on the discharge.
•
Return line from building loop is connected to the cold water supply pipe after the check valve. From that
point onwards the cold pipe should be insulated.
Gas Supply
•
Check gas type of Rinnai HD water heater matches gas supply available (LPG or Natural) on job site.
•
Gas inlet connection is the top pipe on a MP manifold.
•
Manifold Packs have gas isolation valves per water heater.
•
Ensure gas pipe sizing is adequate to deliver the required volume / pressure. Pipe size used on inlet fitting
is no indication of pipe size required.
•
Refer to appropriate pipe sizing chart in Appendix "F" AS/NZS 5601 for appropriate sized gas pipe that
should be used to ensure adequate gas supply.
•
Gas meter / LPG cylinder and regulator should also be of suitable size to ensure sufficient gas supply to the
gas installation.
•
Purge gas pipe to ensure removal of debris etc prior to final connection.
•
Check for gas escapes using suitable methods as listed in Appendix "E" AS/NZS 5601.
Electrical Supply
•
100 amps per HD do not exceed 24 units to one GPO.
Filling Instructions
•
Flush pipe work to remove any debris before final connection.
•
Turn on hot water tap to allow air to be expelled from system.
•
Check all connections for water leakage. Tighten as required.
•
Purge gas lines until gas is available at water heaters.
•
Prime circulating pump(s) before start up by removing chrome screw and allowing water to drip out the end
of the pump shaft.
Rinnai 14 Commercial Manifold Pack OIM