A.O. Smith ADM - 115 User Manual
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10.Use the pressure gauge to read the supply pressure at test nipple (6). Refer to the gas data table (3.4.3 "Gas data").

Note

Consult the mains gas supply company if the supply pressure is not correct.

11.Use the pressure gauge to read the burner pressure at nipple (8). Refer to the gas data table (3.4.3 "Gas data").

Note

If the burner pressure is not correct and the appliance is fitted with a blank plate or high-lowcontrol, you willnot be able to adjust the pressure. In this case, consult your installation engineer or supplier. If the appliance is indeed fitted with a burner pressure regulator, the pressure can be

adjusted (3.11.2 "Adjusting the pressure").

3.11.2Adjusting the pressure

1.Remove the cap (2) from the burner pressure regulator.

2.Depending on the correction required, correct the burner pressure by turning adjustment screw (3):

-Adjustment screw anticlockwise: burner pressure decreases.

-Adjustment screw clockwise: burner pressure increases.

3.Cover the opening of the adjusting screw and check the burner pressure against the value given in thegas data table (3.4.3 "Gas data").

4.If the pressure reading is not correct, repeat the burner pressure adjustment until the correct pressure is reached.

5.Fit the cap (2) back on the burner pressure regulator.

3.11.3Finalising

1.Shut off the gas supply.

2.Disconnect the two pressure gauges and retighten the sealing screws in the test nipples.

3.Replace the cover.

Note

Before starting-upthe appliance, take time to fill in the warranty card supplied with the appliance. This enables us to guarantee the quality of our systems, and to further enhance our warranty procedure.

Please return this card as soon as possible. Your customer will then receive a warranty certificate with our warranty conditions.

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Installation

 

 

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4Conversion to a different gas category

Caution

The conversion may only by carried out by an authorised installation engineer.

If the appliance must operate on a family of gases (LP gas or natural gas) or other gas category than that for which the appliance has been set at the factory, the appliance will have be adapted using a special conversion kit.

Caution

You must check the supply pressure and burner pressure once the conversion is complete.

This chapter covers the following:

Conversion to different category ADM 40 through 115.

Conversion from natural gas to LP gas.

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4

Legend

1.cover plate

2.retaining strips

3.orifice with stamped figures

4.1Conversion to different category ADM 40 through 115

Conversion to a different gas category

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Exchanging orifices

 

1

2

3

IMD-0126R1

1.Isolate the appliance from the power supply (10.3 "Isolating the appliance from the mains").

2.Shut off the gas supply.

Caution

The burner can be hot.

3.Unscrew the cover plate (1) from the burner support.

4.Use a suitable tool to remove the retaining strips (2). Note that the retaining strips have very sharp edges. Withdraw the retaining strips straight upwards.

Note

The radiation shield / condensation tray can be temporarily loosened to simplify disassembly of the burner.

5.Remove the burners one by one from their brackets at the front. To do this, you first move them away from you and then downwards. The orifices will now be accessible

6.Remove the orifices.

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7.Select and fit the correct orifices from the conversion kit, based on the gas data table (3.4.3 "Gas data"). The orifice diameter is stamped on the orifice itself, see (3).

8.Re-fitthe burners back in their original position.

9.Re-fitthe retaining strips.

10.If the radiation shield / condensation tray was loosened, re-fastenit.

Conversion of gas control

Legend

Only applicable numbers are mentioned.

1. burner pressure regulator

4.gas control connector

5.blank plate

6.supply pressure test nipple

7.gas control

6

5

 

7

 

4

IMD-0131R1

1

11.Check whether there is a burner pressure regulator (1) attached to the gas control, or simply a blank plate (5).

Note

If the supply pressure for a gas category is the same as the burner pressure (see the gas data table (3.4.3 "Gas data")) then the gas control must be fitted with a blank plate with cork gasket. A burner pressure that deviates in comparison to the supply pressure requires the use of a burner pressure regulator with rubber gasket. Each conversion kit contains all the necessary components.

12.If the blank plate or burner pressure regulator need to be replaced:

-Unscrew the connector (4) of the gas control.

-If necessary, remove the blank plate or burner pressure regulator (5) or burner pressure regulator (1).

-If necessary, fit the blank plate or burner pressure regulator supplied with the conversion kit.

-Fit the connector (4) of the gas control.

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Conversion to a different gas category

 

 

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4.2Conversion to a different gas category ADM 135

4.2.1

13.Check the supply pressure and burner pressure (3.11 "Checking the supply pressure and burner pressure").

14.Remove the sticker showing the new gas category from the conversion kit, and attach it below the appliance's rating plate. This clearly indicates that the appliance may no longer be run on the gas for which it was originally supplied.

15.Start the appliance (9 "Starting and running").

Introduction

This paragraph describes:

Conversion from LP gas to natural gas

Conversion from natural gas to LP gas

Conversion of gas control

Legend

Only applicable numbers are mentioned.

1. burner pressure regulator

7. gas control

9. high-lowcontrol

1

9

7

IMD-0132R1

 

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4.2.2Conversion from LP gas to natural gas

Installing and removing add-oncomponents

Legend

 

Only applicable numbers are

 

mentioned.

 

4.

timers

4

5.

bracket

 

6.

6-contactterminal strip

5

7.

strain relief

6

 

8.

9-contactterminal strip

7

9.

metric strain relief

 

10. high-lowcontrol lead

8

9

10

IMD-0130R1

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1.Carry out (4.1 "Conversion to different category ADM 40 through 115") steps 1 through 10 .

2.Detach the high-lowcontrol (9).

3.Fit the burner pressure regulator (1) including the sealing gasket from the conversion kit. Attach the burner pressure regulator to the gas control using the two small screws supplied (7).

4.Detach the leads between the 6contact terminal strip(6) and the 9contact terminal strip (8). These are the leads for the timers, high-lowcontrol, gas control, hot surface igniter and flame probe.

5.Remove the timers (4), bracket (5), wiring harness (not shown) and 9contact terminal strip.

6.Turn the metric strain relief (9) with the high-lowcontrol lead (10) to loosen it. Remove this lead.

7.Fit the stop plug from the conversion set in the place of the metric strain relief.

8.Connect the cables of the gas control, the hot surface igniter and flame probe to the 6contact terminal strip as indicated in the electrical diagram (14.2 "Electrical Diagrams ADM").

9.Clamp the gas control cable in one of the supplied strain reliefs (7). Do the same for the leads of the hot surface igniter and flame probe.

10.Check the supply pressure and burner pressure (3.11 "Checking the supply pressure and burner pressure").

11.Remove the sticker showing the new gas category from the conversion kit, and attach it below the appliance's rating plate. This clearly indicates that the appliance may no longer be run on the gas for which it was originally supplied.

12.Start the appliance (9 "Starting and running").

4.2.3Conversion from natural gas to LP gas

1.Carry out steps 1 through 10 (4.1 "Conversion to different category ADM 40 through 115").

2.Detach the burner pressure regulator (1).

3.Fit the high-lowcontroller (9) including the sealing gasket from the conversion set. Attach thehigh-lowcontrol to the gas control using two small screws.

4.Detach the leads from the gas control, the hot surface igniter and the flame probe to the 6contact connector strip (6) and the strain relief (7).

5.Fit the timers (4) including cable harness plus 9contact terminal strip (6) from the conversion kit to the control column.

6.Remove the stop plug (not shown) from the underside of the control column and replace this with the metric strain relief (9) from the conversion kit.

7.Draw the high-lowcontrol lead (10) through the strain relief and tighten the strain relief by turning it until the lead is clamped.

8.Connect the high-lowcontrol lead (10) plug to thehigh-lowcontrol (9).

9.Connect the cables from the timers, highlow control, gas control and the hot surface igniter as shown in the electrical diagram (14.2 "Electrical Diagrams ADM").

10.Check the supply pressure and burner pressure (3.11 "Checking the supply pressure and burner pressure").

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11.Remove the sticker showing the new gas category from the conversion kit, and attach it below the appliance's rating plate. This clearly indicates that the appliance may no longer be run on the gas for which it was originally supplied.

12.Start the appliance (9 "Starting and running").

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Instruction manual ADM