Specifications

Rinnai Australia 18 Owners Guide & Installation Instructions
General Requirements (All Systems):
Return Pump:
• A secondary or building return pump must be installed in conjunction with the Rinnai HEX250
High Efficiency Heat Exchange system. Pumps should be sized for minimal temperature loss
around the ring-main. Pumps must have a isolation valve on the discharge.
• Return line from building loop is connected to a tee on the cold water supply pipe down stream
of the cold water non return valve.
Gas Supply:
Refer to the operational/installation manual supplied with the HD200 appliance for full details. Some
key points are:
• Check gas type of Rinnai HD200 units matches gas type available (LPG or NG) on job site.
• Gas inlet connection is located on the top pipe on a manifold pack or RHS connection on a
single HD200.
• Appropriate gas isolation valves to be fitted. Manifold pack includes a gas isolation valve for
each unit.
• 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 pipe sizing chart in Appendix "F" AS/NZS 5601 for appropriate sized gas pipe to be
used to ensure adequate gas supply.
• Gas meter / LPG cylinder & regulator must also be of a suitable size outlet and pressure rating
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.
Flueing and clearance requirements for HD200i:
For detailed instructions on clearances refer to AS/NZS 5601 Figure 6.2 and flueing requirements for
HD200i units (where necessary) refer to the flue instructions packed separately with the flueing
components.
DDHEX250 Hot Water Thermostat and Electrics:
• Each HD200 requires a GPO.
• DD250HEXHWTSTAT requires a GPO.
• Ring main pumps require a GPO.
• Skid packages may include GPO’s, reducing number of GPO’s required in plant room.
• The Primary pump is powered and switched by the GPO located on the
thermostat housing.
NOTE
GENERAL INSTALLATION INSTRUCTIONS