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Rinnai SG175 User Manual

Rinnai SG175
44 pages
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This appliance shall be installed in accordance with:
• Manufacturers Installation Instructions
• Current AS/NZS 3000 & AS/NZS 3500
• Local Regulations and Municipal Building Codes including local OH&S requirements
This appliance must be installed, maintained and removed only by an Authorised Person.
For continued safety of this appliance it must be installed and maintained in
accordance with the manufacturers instructions.
Issue
14
All Rinnai gas products
are A.G.A. certified.
AS/NZS 2712
Lic No. 1849
SAI Global
AS3498 Lic W208
SAI Global
AS3498 Lic W169
SAI Global
The solar hot and solar cold pipes between the solar storage tank and the
solar collectors must be suited to the high water temperatures and pressures
that may occur. As such, plastic pipe must not be used. Components used to
join pipes must use metallic materials to achieve sealing.
NOT SUITABLE AS A POOL OR SPA HEATER
Operation & Installation Manual
Rinnai Split Solar Hot Water Systems
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Rinnai SG175 Specifications

General IconGeneral
TypeTankless Water Heater
Fuel TypeNatural Gas or Propane
Maximum BTU Input175, 000 BTU/hr
Weight50 lbs
Energy Factor0.82
Ignition SystemElectronic Ignition
Temperature Range98°F to 140°F
Electrical Requirements120V, 60Hz
Vent MaterialStainless Steel
Ignition TypeElectronic
Venting TypeDirect or Power Vent
Minimum BTU Input15, 000 BTU/hr

Summary

Warnings and Important Information

General Instructions and Warnings

Read all instructions before operating. Follow precautions for safety and performance.

Regulatory Compliance

Details certification by SAI global and adherence to local installation regulations.

Victorian Consumer Notice

Mandates installation by a licensed person from the Victorian Building Authority.

Warnings and Important Information

System Hazards

Covers hazards related to power cords, hot pipes, flammable materials, and pump operation.

Hot Water Scalding Hazards

Warns about scalding risks, especially for children and the infirm, and recommends tempering valves.

Operation Principle

System Location

Safety Devices

General Safety Device Guidelines

Do not tamper with or remove safety devices; ensure all are fitted and working.

Pressure & Temperature Relief (PTR) Valve

Describes the PTR valve's function, normal operation, and potential issues.

Expansion Control Valve (ECV)

Explains the ECV's function and recommended maintenance for preventing leaks.

Gas Booster General Information

Hydrogen Gas

Water Temperature

Turning the Water Heating System Off and On

System Shutdown Procedures

Outlines steps to switch off electric and gas boosted systems for safety.

Water Quality

Maintenance and Regular Care

Servicing and Repair

Save a Service Call

Troubleshooting: Insufficient or No Hot Water

Addresses issues like excessive consumption, incorrect sizing, and valve problems.

Troubleshooting: Booster Heating Issues

Guides on checking booster operation for electric and gas systems.

Troubleshooting: Booster Thermostat Settings

Explains how to check and adjust booster thermostat settings for electric systems.

Save a Service Call

Troubleshooting: High Electricity or Gas Bills

Covers usage patterns, tariffs, controller settings, and lack of solar gain.

Troubleshooting: Solar Control Unit Issues

Addresses issues related to the solar control unit being switched off or sensor placement.

Save a Service Call

Troubleshooting: No Water from Hot Tap

Checks for restrictions in hot tap flow or cold water supply issues.

Troubleshooting: Collector Issues

Covers broken tubes, condensation in collectors, and noisy collectors.

Troubleshooting: Pump and Water Hammer

Addresses issues with the solar pump operating continuously and water hammer.

Troubleshooting: Water Coming from Collectors

Explains frost valve operation and water release from collectors.

Specifications

System Specifications

Details specifications for cylinder types, controllers, and solar collectors.

Flow Control

Explains the function of the variable speed pump for flow rate control.

Solar Collectors Specifications

Provides potential solar output and frost protection information.

Storage Cylinders

Glass Lined Gas Boosted Cylinders

Lists dimensions and specifications for various glass-lined gas boosted cylinder models.

Glass Lined Gas Boosted Cylinders Diagram

Illustrates connection points and dimensions for glass-lined gas boosted cylinders.

Glass Lined Electric Boosted Cylinders

Specifications Table

Lists dimensions and specifications for glass-lined electric boosted cylinder models.

Glass Lined Electric Boosted Cylinders Diagram

Illustrates connection points and dimensions for glass-lined electric boosted cylinders.

Stainless Steel Gas Boosted Cylinders

Specifications Table

Lists dimensions and specifications for stainless steel gas boosted cylinder models.

Stainless Steel Gas Boosted Cylinders Diagram

Illustrates connection points and dimensions for stainless steel gas boosted cylinders.

Stainless Steel Electric Boosted Cylinders

Specifications Table

Lists dimensions and specifications for stainless steel electric boosted cylinder models.

Stainless Steel Electric Boosted Cylinders Diagram

Illustrates connection points and dimensions for stainless steel electric boosted cylinders.

Gas Booster Specifications

Model Specifications

Details boost capacity, flow rates, and consumption for various gas booster models.

Important Notes for Gas Boosters

Highlights incompatible models and essential usage guidelines.

Installation

Regulations and OH&S

Covers installation requirements, manual lifting, working at heights, and suitability.

Location - General Information

Specifies accessibility, clearances for service, and collector positioning for optimum benefit.

Storage Cylinder Location

Details placement of the storage cylinder for optimal hot water delivery and stability.

Installation

Gas Booster Location and Mounting

Provides guidelines for gas booster outdoor installation and mounting clearances.

Gas Supply Requirements

Details gas supply requirements, pipe sizing, and isolation valve fitting.

Electric Supply Requirements

Specifies electrical connection requirements for qualified persons and local regulations.

Hot Water Temperature Settings

Covers preset temperatures for gas boosters and thermostat settings for electric systems.

Installation

Water Pipes, Fittings and Insulation

Details pipe material, insulation requirements, and frost protection.

Pipe Sizing Guidance

Provides guidance on pipe sizing for solar flow and return pipes based on collector type.

Water Supply Considerations

Discusses water pressure, chemistry, and the need for filters if impurities are present.

Installation

Frost Protection Mode

Refers to controller manual for information on pumped frost protection.

Supplied Valves and Fittings

Lists supplied valves and fittings such as PTR valve, non-return valve, and air bleed valve.

Installer Supplied Valves and Fittings

Details valves and fittings to be supplied by the installer, including ECV and tempering valves.

Installation

Typical Installation Option 1

Illustrates a plumbing setup with temperature limiting device and ECV.

Typical Installation Option 2

Shows an alternative plumbing setup with temperature limiting device and ECV.

Installation

Gas Booster Information

Provides information on the Rinnai Smartstart continuous flow gas booster.

Important Installation Notes

Highlights tempered water requirements and local regulation compliance.

Installation

Gas Booster Clearances

Details required clearances for gas booster flue terminals based on AS/NZS 5601.

Installation

Gas Booster Mounting

Provides step-by-step instructions for mounting the gas booster bracket.

Installation

Components and Installation Diagrams - Glass Lined SG175 or SG215

Illustrates component layout for SG175/SG215 with SGPKIT2C.

Installation

Items Supplied with Cylinder and SGPKIT2C

Lists components supplied with SG175/SG215 cylinders and SGPKIT2C.

Installation

Components and Installation Diagrams - Glass Lined SG270SL or SG320SL

Illustrates component layout for SG270SL/SG320SL with SGPKIT3C.

Installation

Items Supplied with Cylinder and SGPKIT3C

Lists components supplied with SG270SL/SG320SL cylinders and SGPKIT3C.

Installation

Components and Installation Diagrams - Stainless Steel Gas Boost

Illustrates component layout for Stainless Steel Gas Boost with USKIT1C.

Installation

Items Supplied with Cylinder and USKIT1C

Lists components supplied with Stainless Steel Gas Boosted cylinders and USKIT1C.

Installation

Components and Installation Diagrams - Glass Lined Electric Boosted Systems

Illustrates component layout for Glass Lined Electric Boosted Systems with SEPKIT.

Installation

Items Supplied with Cylinder and SEPKIT

Lists components supplied with Glass Lined Electric Boosted Systems and SEPKIT.

Installation

Components and Installation Diagrams - Stainless Steel Electric Boosted Systems

Illustrates component layout for Stainless Steel Electric Boosted Systems with USKIT1C.

Installation

Items Supplied with Cylinder and USKIT1C

Lists components supplied with Stainless Steel Electric Boosted cylinders and USKIT1C.

Installation Procedure

Install Solar Collectors and Position Cylinder

Position and install solar collectors and the storage cylinder according to manual guidelines.

Connect PTR Valve and Mount Gas Booster

Connect the PTR valve and mount the gas booster as per instructions.

Pump Assembly and Solar Controller Setup

Connect pump assembly and configure the solar controller.

Installation Procedure

Connect Temperature Sensor Leads

Connect sensor leads correctly to ensure proper system function and avoid issues.

Cold Water Supply and Drain Lines

Connect cold water supply, purge lines, and fit relief drain lines.

Hot Water Discharge and Gas Connection

Connect hot water discharge and gas supply to the booster.

Installation Procedure

Filling the System

Steps for filling the system with water, including air bleeding and leak checks.

Installation Procedure

Solar Pump Operation and Flow Rate

Ensures sensors are connected and details flow rate adjustment for optimal performance.

Pre Solar Heating Checks

Checklists for solar collector installation, roof integrity, and sensor connections.

Installation Procedure

Gas Booster Commissioning

Steps for commissioning the gas booster, including gas supply, pressure, and temperature checks.

Installation

Connect to Electrical Supply - Standard Controller

Wiring diagrams and instructions for connecting standard controllers to elements.

Heating Element Thermostat Settings

Specifies thermostat settings for single and twin element heaters for safety and durability.

Installation

Connect to Electrical Supply - Deluxe Controller

Wiring diagrams and connection instructions for deluxe controllers.

Installation

Finishing the Installation

Final steps including removing covers, activating power, and confirming temperatures.

Draining Instructions

Procedure for draining the system, including disconnecting pipes and outlets.

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