A.O. Smith BTI 100 G Converting to another type of gas, Maintenance, Magenesium anode, Unit BTI

2.7Converting to another type of gas

For conversion of the appliance from natural gas to another type of gas, or visa versa, it is necessary to exchange the pilot injector and the main injector. The conversion may only be executed by a qualfied competent person.

Procedure:

1.Shut the heater down. Close the main inlet gas valve and switch off the electricity supply at the main switch;

2.Remove the burner assembly;

3.Replace the injectors with the cor- rect injectors from the conversion set. (see table below).

Remark:

-When conversion of the appliance from natural gas to another type of gas, fix the screw on the gas block of the burner pressure control as far as the stop.

-When conversion of the appliance from another type of gas to natural gas, then the right burner pressure should be adjust.

2.8Maintenance

To ensure safe and efficient operation of the water heater it is recommended that it is cleaned and serviced at least once a year by a qualified competent person.

2.8.1Magenesium anode

The life cycle of the anode is determined by the quality and the quantity of the water flowing through the water heater. It is therefore recommended that the anode be inspected and replaced if necessary at least once a year.

1. Close the stop cock in the cold water supply pipe;

2. Open the nearest hot water tap in order to allow the pressure to drop from the water heater and the pipes;

3. Slacken the anode with a fitting wrench;

4. Check the anode and replace it if it has been reduced in diameter by 60% or more at any point on its lenght;

5. Check for water leaks.

If is necessary to replace the anode it should be replaced by one of the same type. The type of anode required can be detemined on the basis of the type of the appliance and the serial number.

	unit		BTI 85			BTI 100
		G20	G30	G31	G20	G30	G31
Supply pressure	mbar	20	30	37	20	30	37
Burner pressure	mbar	11.5	30	37	10.0	30	37
Diameter main injector	mm	3.90	2.30	2.30	4.50	2.35	2.35
Diameter pilot injector	mm	0.56/	0.23	0.23	0.56/	0.23	0.23
		0.41			0.41

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