Rinnai 18
Commercial Manifold Pack OIM
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 dead-leg installations.
•
Maximum cold water inlet pressure to Manifold Pack is 1000kPa. Fit pressure limiting valve if required.
•
Minimum water pressure requirement is 300kPa.
•
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
•
Connect hot water outlet pipe on the other side of the manifold pack that the cold supply is connected. For
example, if the cold water supply is connected to the left hand side, then connect the hot water building
supply to the right hand side.
•
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. Pump should be sized for minimal temperature loss around the ringmain. 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
•
Each water heater consumes approximately 100 Watts when in operation. It is recommended not to exceed
24 heaters on one electric supply circuit. Refer to the manual supplied with the specific water heater for
exact requirements..
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 (as illustrated).
INSTALLATION HANDOVER MANUAL
