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Hamworthy DORCHESTER DR35L User Manual

Hamworthy DORCHESTER DR35L
44 pages
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IMPORTANT NOTE
THESE INSTRUCTIONS MUST BE READ
AND UNDERSTOOD BEFORE INSTALLING,
COMMISSIONING, OPERATING OR
SERVICING EQUIPMENT
DORCHESTER
DR35L to DR90L-CE
HOT WATER
STORAGE HEATERS
Installation, Commissioning
and Maintenance Instructions
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Hamworthy DORCHESTER DR35L Specifications

General IconGeneral
ModelDORCHESTER DR35L
CategoryWater Heater
Output35 kW
Operating PressureUp to 10 bar
Fuel TypeNatural Gas
TypeDirect Gas Fired Water Heater

Summary

3.0 General Requirements

5.0 Gas Supply

11.0 Control System

11.1 Control Thermostat

Regulates hot water outlet temperature, recommended max 60°C.

11.2 Limit Thermostat

Provides overheat protection with thermal reset; causes lockout if activated.

12.0 Commissioning

12.1 Checks

Pre-commissioning checks for gas supply, ventilation, water system, and electrical supply.

12.2 Procedure for Lighting (Permanent Pilot Ignition)

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

12.3 Combustion Check

Instructions for checking CO2 and CO levels for safe combustion.

13.0 Servicing

13.1 Removal of Gas Train

Detailed steps for disconnecting and removing the gas train assembly.

13.2 Burner Assembly

Instructions for inspecting and cleaning individual burner bars.

13.3 Servicing Pilot Burner

Checks for thermocouple, electrode, and pilot injector cleanliness.

13.4 Pilot Burner

Inspects pilot burner, thermocouple, and piezo ignition system.

13.5 Cleaning Flue Gas Passageways

Guide to accessing and cleaning heater flueways and firetubes.

13.6 Inspection of the Heater Waterside Surfaces and Magnesium Anodes

Procedures for draining, inspecting the vessel, and checking magnesium anodes.

13.7 Inspection of Magnesium Anodes

How to inspect and replace sacrificial magnesium anodes for corrosion protection.

15.0 Storage Tanks

APPENDIX 1

APPENDIX 3

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