A.O. Smith ADM - 135, ADM - 115, ADM - 80, ADM - 90, ADM - 50, ADM - 60, ADM - 40 User Manual

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5 Filling

Installation diagram

Legend

Only applicable numbers are mentioned.

1.pressure reducing valve (mandatory)

3.T&P valve (mandatory)

4.stop valve (recommended)

5.non-returnvalve (mandatory)

6.circulation pump (optional)

7.top to bottom circulation pump (optional)

9.drain valve

10.manual gas valve (mandatory)

11.service stop valve (mandatory)

12.temperature gauge (recommended)

14.hot water draw-offpoints

15.expansion valve (mandatory)

16.expansion vessel (mandatory)

17.3-wayaeration valve (recommended)

18.water tank

19.float valve

A.cold water supply

B.hot water supply

C.circulation pipe

D.gas supply

E.overflow pipe

H. overflow pipe

UNVENTED

14

14

14

 

 

 

12

 

 

 

B

 

 

 

11

 

4

3

 

 

6

4

 

 

7

 

 

5

16

 

4

5

 

 

4

 

 

C

 

5 1 4

A

 

 

 

9

 

15

 

D

 

 

 

 

10

 

 

VENTED

C

4

6

5

4

 

 

 

 

9

 

 

 

H

 

 

 

E

19

A

 

 

 

 

4

 

 

17

18

 

 

 

 

 

 

 

12

 

 

 

 

B

 

 

 

 

11

 

 

3

4

14

 

 

 

14

 

 

 

7

 

 

 

14

 

 

 

5

 

 

 

C

 

 

 

4

 

 

 

 

 

 

 

 

4

 

 

D

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5

 

Filling

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5.1 Filling unvented

 

To fill the appliance, proceed as follows:

 

 

 

installations

1.

Open the stop valve (11) in the hot water pipe and, if present, the stop valves

 

 

 

 

(4) for the circulation pump (6).

 

 

 

2.

Close the drain valve (9).

 

 

 

3.

Open the nearest hot water draw-offpoint (14).

 

 

 

4.

Open the stop valve (4) on the cold water side (A) so that cold water flows

 

 

 

 

into the appliance.

 

 

 

5.

Completely fill the appliance. When a full water jet flows from the nearest

 

 

 

 

draw-offpoint, the appliance is full.

 

 

 

6.

Bleed the entire installation of air, for example by opening all draw-offpoints.

 

 

7.

The appliance is now under water supply pressure. There should be no

 

 

 

 

water coming out of the expansion valve (15), nor the T&P valve (3). If this

 

 

 

 

does happen, the cause might be:

 

- The water supply pressure is greater than the specified 8 bar. Rectify this by fitting a pressure reducing valve (1).

- The expansion valve in the protected cold supply setup is defective or incorrectly fitted.

5.2Filling vented installations

To fill the appliance, proceed as follows:

1.Open the stop valve (11) in the hot water pipe and, if present, the stop valves

(4) for the circulation pump (6).

2.Close the drain valve (9).

3.Open the nearest hot water draw-offpoint (14).

4.Open the stop valve (4) on the cold water side (A) so that cold water flows into the appliance.

5.Completely fill the appliance. When a full water jet flows from the nearest draw-offpoint, the appliance is full.

6.Bleed the entire installation of air, for example by opening all draw-offpoints.

7.The appliance is now under water supply pressure. There should be no water coming out of the T&P valve (3). If this does happen, the T&P valve might be defective or incorrectly fitted.

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6 Draining

Installation diagram

Legend

Only applicable numbers are mentioned.

1.pressure reducing valve (mandatory)

3.T&P valve (mandatory)

4.stop valve (recommended)

5.non-returnvalve (mandatory)

6.circulation pump (optional)

7.top to bottom circulation pump (optional)

9.drain valve

10.manual gas valve (mandatory)

11.service stop valve (mandatory)

12.temperature gauge (recommended)

14.hot water draw-offpoints

15.expansion valve (mandatory)

16.expansion vessel (mandatory)

17.3-wayaeration valve (recommended)

18.water tank

19.float valve

A.cold water supply

B.hot water supply

C.circulation pipe

D.gas supply

E.overflow pipe

H. overflow pipe

UNVENTED

14

14

14

 

 

 

12

 

 

 

B

 

 

 

11

 

4

3

 

 

6

4

 

 

7

 

 

5

16

 

4

5

 

 

4

 

 

C

 

5 1 4

A

 

 

 

9

 

15

 

D

 

 

 

 

10

 

 

VENTED

C

4

6

5

4

 

 

 

 

9

 

 

 

H

 

 

 

E

19

A

 

 

 

 

4

 

 

17

18

 

 

 

 

 

 

 

12

 

 

 

 

B

 

 

 

 

11

 

 

3

4

14

 

 

 

14

 

 

 

7

 

 

 

14

 

 

 

5

 

 

 

C

 

 

 

4

 

 

 

 

 

 

 

 

4

 

 

D

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6

 

Draining

 

 

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6.1Draining unvented Some service activities require the appliance to be drained. The procedure is as

installations follows:

1.Shut down the appliance by setting the ON/OFF switch on the control panel to position 0.

2.Isolate the water heater from the power supply by putting the isolator between the appliance and the mains power supply to position 0.

3.Shut off the gas supply (10).

4.Close the stop valve (11) in the hot water pipe.

5.Close the supply valve of the cold water supply (A).

6.Open the drain valve (9).

7.Bleed the appliance (or installation) so that it drains completely.

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6.2Draining vented installations

Some service activities require the appliance to be drained. The procedure is as follows:

1.Shut down the appliance by setting the ON/OFF switch on the control panel to position 0.

2.Isolate the water heater from the power supply by putting the isolator between the appliance and the mains power supply to position 0.

3.Shut off the gas supply (10).

4.Close the stop valve (11) in the hot water pipe.

5.Close the stop valve (4) between the cold water head tank and the cold water inlet.

6.Open the drain valve (9).

7.Bleed the appliance (or installation) so that it drains completely.

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6

 

Draining

 

 

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7 The control panel

7.1Introduction

Topics covered in this chapter, in sequence:

Control panel

Explanation of icons

ON/OFF switch

Control thermostat

Burner control reset button

Flue gas thermostat reset button

7.2Control panel

This figure shows the control panel.

The control panel

The control panel comprises:

an ON/OFF switch

a reset button

a control thermostat with rotary knob

two status LEDs

7.3Explanation of icons

The table explains the meanings of the icons.

Icons and their meaning

 

Name

Explanation

ON/OFF

'ON mode' / 'OFF

switch

mode'

Temperature

Set water

control

temperature

 

(Tset)

 

 

 

 

 

Reset button

Reset burner

 

 

 

 

 

 

 

 

 

 

 

control

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Power LED

Power indicator

 

 

 

 

 

 

 

 

 

 

 

for burner control

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Error LED

Burner control

 

 

 

 

 

 

 

 

 

 

 

lockout

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

7.4ON/OFF switch

The ON/OFF switch sets the appliance in ON mode or OFF mode. In OFF mode the appliance is still electrically live. This ensures that the frost protection is active.

Note

To electrically isolate the appliance, you must use the isolator between the appliance and the mains power supply.

7.5Control thermostat

Use the rotary knob of the control thermostat to set the desired water temperature between ± 40°C and ± 70°C. The range is continuous and is labeled 1 through 4. The table shows the temperatures coresponding to the numbers on the knob.

Temperature settings

Position Temperature

1± 40°C

2± 50°C

3± 60°C

4± 70°C

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7

 

The control panel

 

 

7.6Burner control reset button

An error can cause the burner control to lock out. When this happens, the red LED on the control panel will illuminate. After eliminating the cause of the error, you can reset the appliance using the reset button.

Note

Before resetting, always eliminate the cause of the error.

The appliance's error conditions (8.3 "Error conditions") and how to resolve them are described in the error condition summary(11 "Troubleshooting").

7.7Flue gas thermostat reset button

A malfunction in the flue gas discharge, e.g. a blockage in the chimney, can lead to the flue gas thermostat locking out. This state is evident when the push button on the flue gas thermostat has been activated (refer to the figure). Once the cause has been removed, and the sensor has cooled down sufficiently, press this push button to reset (if the sensor is not sufficiently cooled down, the flue gas thermostat will immediately lock out again). The appliance will then automatically start up again, if there is a demand. If this is not the case, please consult the error condition

summary (11 "Troubleshooting").

Note

The draught diverter may be hot.

Figure: Flue gas thermostat reset button

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8Status of the appliance

8.1Introduction

Topics covered in this chapter:

Operating modes;

Error conditions;

8.2Operating modes

When running, the appliance has three basic operating modes, namely:

ELECTRICALLY ISOLATED

In this mode, the appliance is off and no components are live. The isolator (switch between the appliance and the mains power supply) is off. On the control panel:

-the ON/OFF switch is at position 0;

-the green light is dimmed.

OFF

In this mode, the frost protection is activated. The isolator is at position I. On the control panel:

-the ON/OFF switch is at position 0;

-the green light is lit.

ON

In this mode, the appliance continuously responds to the heat demand. On the control panel:

When this happens, the red LED on the control panel will be illuminated. The burner control is locked out.

After eliminating the cause, the appliance must be returned to service by pressing the reset

button (7.6 "Burner control reset button").

Blocking errors

You can recognise this condition from the fact that the appliance does not start running even though the water temperature is lower than the setting that you have defined using the control

thermostat (7.5 "Control thermostat").

These errors disappear automatically once the cause of the error has been removed, after which the appliance resumes operation by itself.

The cause of the error cannot be seen on the control panel. For a detailed overview of error conditions, please refer to the error tables (11 "Troubleshooting").

If, as end-user,you find the appliance in an error condition, you may attempt to restart the appliance by pressing the reset button once. However, if the error returns or occurs several times in a short time, you must contact your service and maintenance engineer.

-the ON/OFF switch is at position I;

-the water temperature can be set using the rotary knob of the control

thermostat (7.5 "Control thermostat");

-the green light is lit.

8.3Error conditions

If the water heater goes into an "error" condition, you will be unable to draw hot water. The frost protection will also be out of operation. These error conditions are divided into three groups:

Lockout error from the flue gas thermostat

The safety (pushbutton) on the flue gas thermostat in the draught diverter has been activated. After removing the cause, the pushbutton (7.6 "Burner control reset button") must be pressed to restart the appliance.

Lockout error from the flue gas thermostat

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8

 

Status of the appliance

 

 

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