Preconditions for installation, Location

2.Preconditions for installation

The appliance can only be sold in the countries mentioned in the type plate.

2.1Regulations

Any local by-laws and regulations pertaining to installation and use of gas-heated appliances must be observed. Please refer to the laws that should be attended in South Africa.

2.2Location

The appliance should be sited in a well ventilated room where it will not be exposed to temperatures below freezing.

To prevent corrosion, the combustion air must not contain any corrosive substances. Substances classed as corrosion- promoting include halogenated hydrocarbons such as are found in solvents, paints, adhesives, aerosol propellants and various household cleaners. Appropriate measures should be taken where necessary.

With the exception of the flue pipe, the surface temperature of the appliance is below 85 °C. No special safety measures are therefore necessary.

Site appliance as shown in Fig. 4.

Always site appliance in a location not exposed to temperatures below freezing. If this is not possible, the appliance must be switched off and drained whenever there is a risk of freezing.

Danger: the appliances are designed to prevent flame reflow. In case you suspect anything unusual in the appliance operation, please shut down gas and water cocks, and call an approved technician to check the local conditions.

To prevent flame reflow in outdoor installations please make sure that a wind/rain protection is fitted.

To prevent flame reflow in indoor installations please make sure that a wind/rain protection is fitted at the end of the secondary flue.

2.3Fixing the appliance

Remove the temperature control and the output control. Remove the outer case by sliding it forwards and then lifting upwards.

Fix the appliance using the sleeves and hooks supplied so that it is vertical.

Never allow the appliance to rest against water or gas pipes.

2.4Water connection

It is advisable to drain the appliance before installing it as any dirt or grit inside it could reduce the water flow rate and, in extreme cases, could completely clog up the appliance. Mark hot water and cold water pipes so as to prevent confusion.

Connect pipe to automatic water valve using the connecting kit supplied.

To prevent problems caused by sudden pressure fluctuations in the water supply, it is advisable to fit a non-return valve to the water outlet.

2.5Gas connection

Take care to ensure dirt is not allowed to enter gas inlet. Make sure that the type of gas specified on the appliance type plate is the same as that supplied by the gas authorities.

Select pipe diameter to suit output of instantaneous water heater being installed.

Fit gas service cock as close to appliance as possible.

Caution: This is a low pressure gas appliance. A SA certified 2.8 kPa low pressure regulator must be fitted.

2.6Flue

It is absolutely essential that all instantaneous water heaters are connected to a suitably dimensioned flue pipe by means of a gas-tight connection.

The flue pipe should be made of galvanised iron, aluminium, stainless steel or fibre concrete. Fit as shown in Fig. 4.

A flexible or rigid pipe should be used, fit it inside the flue socket. The external diameter of the pipe should be slightly smaller than the dimension specified in the appliances dimensions table.

wind/rain

protection

Fig. 4

2.7Commissioning

Turn on the gas and water cocks and check all connections for leaks.

Check flue gas safety device good functioning, proceed as explained in section 3.5.

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