Bosch C1210ES Specifications download pdf (Page 36)

36 | Maintenance and service

C 1210 ES/ESC6 720 644 887 (2014/11)

After following instructions indicated in “Troubleshooting” section,

▶ press reset button firmly in order to return heater to normal

operation.

Fig. 61 Reset button

If the problem persists, contact your installer.

6.8 Program button

Fig. 62 “Program” key

6.8.1 Memorizing selected temperature

▶ Press buttons or to select desired temperature.

▶ Hold “Program” button for 3 seconds to save temperature.

When LCD stops blinking, temperature is saved in memory.

Using “Program” function

In order to select memorized temperature

▶ Press “Program” key.

LCD shows pre-memorized temperature, which is now the hot water

selected temperature.

6.9 Locked condition

This condition is only valid for appliances with one or more remote

controls installed.

Fig. 63 Locked condition

Whenever LCD shows , the temperature setting cannot be

adjusted because the appliance is in use by a user which already

selected a different temperature. Appliance will be automatically unlock

5 minutes after closing hot water tap.

7 Maintenance and service

7.1 Annual maintenance

(To remove front cover, see page 8.)

Venting System

• Venting system - inspect inside of flue pipe for any blockage or

restriction. Observe burner flames during heater operation. (front

cover must be removed). Burner flames should be steady and blue.

Yellow, inconsistent (bouncing) flames may be an indication of poor

ventilation or combustion air supply. Inspect the combustion air inlet

pipe for blockage or debris. Inspect combustion air and exhaust

terminations for blockage or debris.

Combustion Chamber

• Inspect burner observation window (Fig.76, #14) for cracks or

spillage of flue gases. Observe burner flames during heater

operation. Flames should be steady and blue with no signs of

yellowing. Yellow burner flames are an indication of improper

combustion. Refer to Section4.4, page 23, chapter 4.3, page 11 of

this manual to verify exhaust system and combustion air supply

meets manufacturer's specifications.

Pressure Relief

• Manually open the pressure relief valve to ensure proper operation.

Inlet Water Filter

• Verify the inlet filter screen is clean and undamaged. The inlet water

filter is located on the bottom of the appliance, to the right of the cold

water inlet fitting. (See Fig.32, page 28). Close installer supplied

water shutoff and remove wireform spring clip from filter. Remove

filter, clean and or replace if damaged.

Descaling

• In areas where the water supply has a high mineral content, the heat

exchanger should be flushed with a descaling solution. Scale build up

will shorten the life of the water heater and damage resulting from

scale is not covered under warranty. Refer to section7.3 for detailed

WARNING:

▶ Always shut off the electrical power supply, shut off

the manual gas valve and shut off the water valves

whenever servicing.

NOTICE:

▶ Check and clean the complete water heating system

once a year.

▶ Carry out a maintenance overhaul if necessary.

Immediately repair defects to avoid damage to the

system.

Annual maintenance table

Every year

1. Inspect venting system X

2. Inspect combustion chamber X

3. Inspect burner X

4. Inspect pressure relief X

5. Inspect water filter X

Inspect Heat

Exchanger

Descaling X

Fin Coils X

7. Inspect condensate trap X

Table 33 Annual maintenance

1 2 ... 31 32 33 34 35 36 37 38 39 40 41 ... 63 64

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Bosch C1210ES Specifications Page 36

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