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andrews 29/120 User Manual

andrews 29/120
62 pages
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andrews 29/120 Specifications

General IconGeneral
Voltage230 V
Pressure Rating8 bar
ThermostatAdjustable
CategoryWater Heater
Model29/120
Capacity120 Litres
MaterialSteel

Summary

Introduction

Health and Safety at Work Act, 1974

Outlines manufacturer and supplier duties for product safety and user information.

Technical Data

Installation

Assembly Instructions

Step-by-step guide for assembling flue collector hood and related components.

Location

Specifies requirements for the physical placement of the water heater.

Flue System

Details flue connection, material, and installation recommendations for safe exhaust.

Air Supply and Ventilation

Outlines requirements for adequate air intake and ventilation for proper operation.

Water Connections

Procedures for connecting water inlet, outlet, and drain lines.

Unvented Systems

Installation procedures for systems operating without an open vent.

Commissioning

To Light the Burner

Step-by-step guide for igniting the pilot and main burner.

To Check Main Burner Pressure

Procedure to verify and adjust the main burner's gas pressure.

Check for Spillage at the Draught Diverter

Safety check to ensure flue gases are vented correctly.

Instructing the User

Guidance on explaining operation, safety, and maintenance to the end-user.

Operation

Sequence of Operation

Explains the functional steps of the water heater during use.

ECO (Energy Cut-Off)

Details the safety feature that shuts off gas in case of overheating.

Temperature Stratification (Stacking)

Describes a phenomenon affecting water temperature distribution within the tank.

Servicing

Burner Assembly

Instructions for cleaning and maintaining the burner components.

Gas Control Valve

Procedures for checking and servicing the gas control valve.

Flue-Ways

Guide for cleaning and inspecting the internal flue pathways.

Cleaning the Storage Vessel

Process for removing scale and deposits from the water storage tank.

Magnesium Anodes

Inspection and replacement of sacrificial anodes to prevent corrosion.

Safety Valve

Procedures for checking and servicing the safety relief valve.

Replacing Components

Gas Control Valve

Steps for removing and replacing the gas control valve unit.

Thermostats, Upper Limit/Overheat Thermostats and Lower User Control Thermostat

Procedures for replacing temperature control components.

Thermocouple/Pilot Burner/Pilot Restrictor

Steps for replacing pilot assembly and associated parts.

Burner

Instructions for removing and fitting a new burner assembly.

Fault Finding

Water Does Not Get Hot

Troubleshooting steps when the heater fails to produce hot water.

Pilot Flame Failure

Actions to take if the pilot light does not ignite.

Pilot Will Not Stay Lit

Diagnosing issues when the pilot light extinguishes.

Burner Will Not Light (Pilot Established)

Troubleshooting steps when the main burner fails to ignite.

Thermocouple Burns Out Frequently

Investigating causes for repeated thermocouple failure.

Heater Sooting Yellow Flame (Poor Combustion)

Diagnosing and resolving issues related to poor combustion.

Water Temperature Too High

Troubleshooting steps for an excessively hot water output.

Water Temperature Too Low

Diagnosing and resolving issues with insufficient hot water temperature.

Not Enough Hot Water

Steps to address low volume of hot water supply.

Water Dripping From Base of Heater

Identifying the cause of water leaks or condensation from the heater base.

Rumbling Noise (Kettling)

Addressing scale formation causing kettling noise in the heater.

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