A.O. Smith TWI 35-130, TWI 45-190 service manual Introduction, About the device, 0063

1 Introduction

1.1About the device

0063

1.2What to do when you smell gas

1.3Regulations

This manual describes the installation, service and use of the TWI-device.

The TWI-device is a condensating boiler with a fan in the air supply. The TWI can be installed both as a closed and as an open device. The device typically has a concentric chimney connection. The device can also be connected as a parallel system.

The possible device types are B23, C13, C33, C43, C53 and C63.

The information in this manual is applicable to the TWI 35-130 and TWI 45-190. The construction method and the equipment of the device are in conformity with the European standard for gas-fired storage water heaters for the production of domestic hot water (EN 89). With this the devices comply with the European Directive for Gas Devices and so they have the right to the CE -mark.

Warning

Carefully read this manual before starting up the boiler. Not reading this manual and not following the given instructions may lead to personal injuries and damage to the device.

Warning

In case of smelling gas:

No open fire! No smoking!

Avoid sparking!

Do not use any electric switches, including telephone, plug or bell!

Open windows and doors!

Shut off the mains gas supply valve!

Warn occupants and leave the building!

After having left the building, warn the gas company or the installation engineer.

As (end) user, installation engineer or service and maintenance engineer you shall make sure that the entire installation at least complies with the locally applicable:

•building regulations;

•guidelines for existing gas systems formulated by the electricity company;

•guidelines for natural gas systems and the corresponding practical guidelines;

•safety regulations for low-voltage systems;

•regulations concerning drinking water supply;

•regulations concerning ventilation in buildings;

•regulations concerning supply of combustion air;

•regulations concerning discharge of flue gasses;

•requirements for gas-consuming systems;

•regulations concerning inside sewer systems in buildings;

•regulations of the fire department, electricity companies and the municipality.

Further the installation shall comply with the regulations of the manufacturer.

Instruction manual TWI 35-130 G/TWI 45-190 G 7