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Elson 120zd User Manual

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Pack Contents
Zircon unvented water heater incorporating immersion heater(s) & thermal controls•
Factoryttedtemperature/pressurereliefvalve(setat90°C/1Mpa(10bar))•
Coldwatercombinationvalveassembly•
Expansionvessel&mountingbracket•
Tundish•
2 Port motorised valve (indirect models only)•
Compressionnuts&olives•
Immersion heater spanner•
Installation & servicing instructions•
Guarantee card•
IMPORTANT
Pleaseread&understandalltheseinstructionsbeforecommencinginstallation.
Pleaseleavethismanualwiththecustomerforfuturereference.
Zircon Installation Manual
Unvented Direct & Indirect Water Heaters
Installation & Servicing Instructions
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Elson 120zd Specifications

General IconGeneral
ThermostatYes
Overheat ProtectionYes
Dry Boil ProtectionYes
Indicator LightYes
Voltage230V
MaterialMild Steel

Summary

General Requirements

General Installation Procedures

Discharge Pipework Installation

Discharge Pipes from Safety Devices

Requirements for piping from safety devices to a tundish, including diameter and manifold sizing.

Tundish Installation

Placement, orientation, and air gap requirements for the tundish.

Discharge Pipe D2 from Tundish

Requirements for the discharge pipe from the tundish, including material and sizing.

Discharge Pipe Termination

Direct Unit Installation

Direct Unit Safety Precautions

Disconnecting power, avoiding bypass of thermal cut-outs, and correct termination fitting.

Direct Unit Electrical Supply

Requirements for competent electricians, circuit protection, and cable specification.

Indirect Unit Installation

Indirect Unit Safety Precautions

Disconnecting power, avoiding bypass of thermal cut-outs, and correct termination fitting.

Indirect Unit Electrical Supply

Requirements for competent electricians, circuit protection, and cable specification.

Commissioning the System

Filling the Unit with Water

Ensuring fittings are tight, checking expansion vessel pressure, and flushing the system.

Commissioning Direct Units

Switching on electrical supply, heating up, and checking thermostat and safety valves.

Commissioning Indirect Units

Filling primary circuit, switching on boiler, and checking controls and safety valves.

Maintenance Requirements

Safety Valve Operation Check

Manually operating relief valves to check discharge and reseating.

User Instructions and Warnings

General User Warnings

Actions to take if the relief valve discharges and avoiding tampering with safety valves.

Fault Finding and Servicing

Fault Finding Chart

A chart to identify operational faults, their possible causes, and recommended remedies.

Fault Finding Warnings

Warning against tampering with safety valves or controls, which invalidates the guarantee.

Spare Parts Catalogue

Commissioning Checklist

Service Record

Sales and Support Information

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