Hamworthy Purewell Variheat mk2 110c User Manual

Purewell Variheat mk2 c Boilers
Cast Iron, Pre-mix, Condensing, Modular Boilers with
Automatic Ignition for Heating and Domestic Hot Water
Installations
Installation, Commissioning
and Servicing Instructions
MODELS - 70c, 95c, 110c, 140c & 180c
NATURAL GAS I
2H
IMPORTANT NOTE
THESE INSTRUCTIONS MUST BE READ
AND UNDERSTOOD BEFORE INSTALLING,
COMMISSIONING, OPERATING OR
SERVICING EQUIPMENT

Hamworthy Purewell Variheat mk2 110c Specifications

General

Model	Purewell Variheat mk2 110c
Appliance Category	Boiler
Output (kW)	110
Fuel Type	Natural Gas
Mounting	Floor Standing

Summary

1.0 Introduction

1.1 Competent Person and Regulations

Requirements for competent personnel and adherence to regulations for boiler installation.

1.3 Purewell Variheat mk2 Boiler Description

4.0 Site Location and Preparation

4.2 Gas Supply

Specifications and regulations for the gas supply connection to the boiler.

4.3 Flues

Recommendations for flue termination, routing, construction, and drainage.

4.4 Water Supply

Requirements for feed and expansion tanks, pipework, and water treatment.

4.5 Condensate Connections

4.6 Electrical Supply

Safety and installation requirements for the boiler's electrical supply.

6.0 Pre-Commissioning

6.1 Gas Supply

Ensuring gas installation pipework is tested and purged correctly.

6.2 Ventilation

6.3 Pipework, Valves and Pump

6.4 Flue

6.5 Electrical

7.0 Checks Prior to Lighting

7.1 Boiler Gas System Leak Check

Procedure for checking the boiler's gas system for leaks before ignition.

7.2 Checks Prior to Lighting the Boiler

Pre-ignition checks including gas supply, electrical connections, and safety limiters.

7.3 Initial Lighting

Step-by-step guide for safely lighting the boiler for the first time.

7.3.1 Safety Checks

Testing safety interlocks and controller response during the ignition sequence.

7.3.2 Adjusting Boiler Settings

7.4 Combustion Checks

Procedure for measuring and adjusting CO2 levels for optimal combustion.

7.7 Burner Resistance Check

8.0 Boiler Controls

8.1 Controls Overview

8.3 Functions

9.0 Fault Finding

9.1 Safety Temperature Limiter (Limit Thermostat)

Troubleshooting issues related to the safety temperature limiter tripping.

9.2 Ignition Controller

Diagnosing faults related to the burner ignition sequence and flame detection.

10.0 Servicing

10.1 Regular Servicing

Recommendations for routine annual and bi-annual servicing of the boiler.

11.0 Replacement of Failed Components

11.1 Igniter and Flame Probe Assembly

11.2 Safety Temperature Limiter (Limit Stat)

11.3 Main Gas Valve

Recommended procedure for replacing the main gas valve assembly.

11.4 Combustion Fan

Appendix A - Gas Data

Gas Data

Appendix B - Electrical Connections and Controls

External Control Wiring

Appendix C - Flue Data

Flue System Requirements

Condensate Discharge

Appendix D - Ventilation

Air Supply

Air Supply by Natural Ventilation

Air Supply by Mechanical Ventilation

Appendix E - Water Data

Water Circulation System

Minimum System Water Pressure

Pressure Relief Valve (Safety Valve)

Information on the selection and location of safety valves for the system.