Maintenance And Service; Annual Maintenance; Winterizing For Seasonal Use - Bosch 830 ES Installation And Operating Instructions Manual

Maintenance and service

7 Maintenance and service
DANGER:
▶ Always shut off the electrical power supply, shut off the
manual gas valve and shut off the water valves whenever
servicing.
NOTICE:
▶ Inspect and clean the complete water heating system once
a year.
▶ Carry out a maintenance as necessary. Immediately repair
all faults 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 Descaling
Heat
Fin Coils
Exchanger
Table 35 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
pipe for blockage or debris. Inspect combustion air and
exhaust terminations for blockage or debris.
52
Risk of CO poisoning!
▶ For horizontally vented appliances, keep the area around
the venting system free of snow or ice to prevent blockage.
Combustion Chamber
• Inspect burner observation window (fig. 67, #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 chapter 4.4,
page 34, chapter 4.3, page 15 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
Every year
Inlet Water Filter
X
• Verify the inlet filter screen is clean and undamaged. The
inlet water filter is located on the bottom of the appliance,
X
to the right of the cold water inlet fitting. (See fig. 33,
page 41). Close installer supplied water shutoff and
X
remove wireform spring clip from filter. Remove filter, clean
X
and or replace if damaged.
X
Descaling
X
• In areas where the water supply has a high mineral content,
X
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 chapter 7.3 for detailed
instructions on descaling the heat exchanger
Fin Coils
• Inspect heat exchanger fin coils for soot build-up or
blockage. To access fincoil, consult service bulletin at
www.bosch-climate.us. If there is evidence of soot build-up
or blockage, the heat exchanger should be removed by a
professional and cleaned thoroughly
7.2
The water heater must not be installed in a location where it
may be exposed to freezing temperatures. If the heater must be
left in a space which is likely to experience freezing
temperatures, all water must be drained from the heater. If
precautions are not taken, resulting damage will not be covered
under the warranty. NOTE: Use of agents such as anti-freeze is
WARNING:

Winterizing for seasonal use

830 ES – 6 720 644 936 (2021/08)