Program Button; Locked Condition; Maintenance And Service; Annual Maintenance - Bosch Therm C 1210 ES Installation And Operating Instructions Manual

Maintenance and service

Fig. 60 Reset button
If the problem persists, contact your installer.
6.8

Program button

Fig. 61 "Program" key
6.8.1 Memorizing selected temperature
+
▶ Press buttons or
▶ 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. 62 Locked condition
50
to select desired temperature.
Whenever LCD shows
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
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
1. Inspect venting system
2. Inspect combustion chamber
3. Inspect burner
4. Inspect pressure relief
5. Inspect water filter
6. Inspect
Heat
Exchanger
7. Inspect condensate trap
Table 33 Annual maintenance
7.1

Annual maintenance

(To remove front cover, see page 12.)
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
C 1210ES/ESC – 6 720 644 887 (2022/04)
, the temperature setting cannot
Every year
X
X
X
X
X
Descaling X
Fin Coils X
X