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Heatrae Sadia MegaFlo User Manual

Heatrae Sadia MegaFlo
36 pages
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Megaflo He
1
36005823 issue 6
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Heatrae Sadia MegaFlo Specifications

General IconGeneral
TypeUnvented Cylinder
MaterialStainless Steel
InsulationHigh-density foam
PressureUp to 3 bar
Heating ElementImmersion Heater
Heat SourceElectric
ThermostatAdjustable thermostat
Warranty25 years (cylinder), 2 years (parts)
CapacityVaries (e.g., 120L, 150L, 200L, 250L, 300L)

Summary

Introduction to Megaflo Installation

General Requirements for Megaflo Installation

Megaflo Component Checklist

Lists components supplied with the Megaflo unit for installation.

Siting the Megaflo Unit

Provides guidance on where to place the Megaflo unit for installation.

Megaflo Water Supply Requirements

Details requirements for the mains water supply pressure and flow rate.

Outlet and Terminal Fittings

Discusses compatibility and connection of terminal fittings like taps.

Megaflo Installation Limitations

Outlines instances where the Megaflo unvented water heater should not be used.

General Installation Procedures for Megaflo

Megaflo Pipe Fittings

Describes the types and sizes of pipe fittings used for Megaflo connections.

Cold Water Supply Connection

Details recommendations for the cold water supply pipe size and its isolation valve.

Cold Water Combination Valve Installation

Explains the connection and function of the Cold Water Combination Valve.

Expansion Core Unit Installation

Describes the use and fitting of the Expansion Core Unit for balanced cold water supply.

Drain Tap Installation

Details the installation of the drain tap for servicing and maintenance.

Outlet Pipework Guidance

Provides guidance on the recommended pipework from the Megaflo to outlets.

Secondary Circulation System

Explains how to connect and use a secondary circulation system.

T&P Relief Valve Insulation

Describes the installation of insulating components for the T&P relief valve.

Installation Warnings

Lists critical warnings related to safety valves and installation.

Discharge Pipework Requirements

Details requirements for safely conveying discharges from safety devices.

Installation of Megaflo Direct Units

Immersion Heater Installation for Direct Units

Details the installation, removal, and replacement of immersion heaters.

Electrical Wiring for Direct Units

Provides guidance on electrical wiring for direct units.

Operation of Direct Units

Explains the recommended thermostat settings and operation.

Safety Precautions for Direct Units

Lists important safety precautions for direct units.

Installation of Megaflo Indirect Units

Boiler Selection for Indirect Units

Guides on selecting suitable boilers for indirect Megaflo units.

Indirect Thermal Cut-out and 2-Port Motorised Valve

Explains the necessity of the 2-port motorised valve for indirect units.

Electrical Wiring for Indirect Units

Details electrical wiring for indirect units and their controls.

Heating System Controls for Indirect Units

Discusses compatible heating system controls for indirect units.

Immersion Heater for Indirect Units

Describes the immersion heater in indirect units and its replacement.

Commissioning the Megaflo Water Heater

Filling and Flushing the Megaflo

Step-by-step guide to filling and flushing the Megaflo unit.

Checking Safety Valve Operation

Instructions on verifying the functionality of safety valves.

Commissioning Direct Units

Commissioning steps for direct electric Megaflo units.

Commissioning Indirect Units

Commissioning procedures for indirect Megaflo units.

Benchmark Log Book Completion

Importance and use of the Benchmark log book for recording installation.

User Instructions for Megaflo

User Warnings and Safety

Critical warnings for users regarding safety and faults.

Temperature Control Adjustment

How to control and adjust water temperature for direct and indirect units.

Flow Performance Explanation

Explains normal flow characteristics and potential cloudiness in water.

Troubleshooting Operational Faults

Procedure to recharge the air volume in the unit to resolve faults.

Megaflo Maintenance Procedures

Regular Maintenance Requirements

Outlines the regular maintenance schedule and requirements.

Checking Safety Valve Function

Steps to check the proper functioning of safety valves.

Cleaning the Strainer

Instructions on how to clean the strainer in the Cold Water Combination Valve.

Draining the Megaflo Unit

Guide on how to drain the Megaflo unit for maintenance.

Descaling Immersion Heaters

Detailed steps for descaling immersion heater elements.

Refilling the System After Maintenance

Procedure for refilling the system after maintenance.

Fault Finding and Servicing Megaflo

Important Servicing Information

Key points and warnings regarding servicing and spare parts.

Megaflo Spare Parts List

Lists available spare parts with their part numbers.

Megaflo Fault Finding Chart

Introduction to the fault finding chart for identifying and rectifying issues.

Megaflo Dimensions and Specifications

Outline Specifications

Summary of key technical specifications and safety features.

Megaflo Guarantee Information

Guarantee Warning

Warning about tampering with the relief valve invalidating the guarantee.

Guarantee Terms and Conditions

Details the terms and conditions of the product guarantee.

Megaflo Contact Information

Customer Service Contact

Contact information for customer service and technical support.

Spares Stockists Information

Lists suppliers for spare parts.

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