Maintenance And Service - Bosch Integra 500 Installation Manual

Maintenance and service

6 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.
Caution:
B Check and clean the complete water
heating system once a year.
B 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 condensate trap
5. Inspect water filter
Table 16 Annual maintenance
6.1 Annual maintenance
(To remove front cover, see page 6.)
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). 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. 70, #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 Section 3.4, page 20,
chapter 3.3, page 9 of this manual to verify exhaust
system and combustion
manufacturer's specifications.
Pressure Relief
• Manually open the pressure relief valve to ensure
proper operation.
34
Every year
X
X
X
X
X
air supply meets
Inlet water filter
• Verify the inlet filter screen is clean and undamaged.
The inlet water filter is located inside the cold water
inlet fitting on the right side of the appliance (See
Fig. 57, page 34). Close installer supplied cold water
shutoff and loosen slotted screw on inlet fitting.
Water will drain from the appliance. Remove
cylindrical filter inside.
Fig. 57 Water filter
1 Inlet water filter
2 Water filter
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 section 6.3
for detailed instructions on descaling the heat
exchanger.
Fin Coils
• Inspect heat exchanger fincoil for soot build-up or
blockage. To access fincoil, consult service bulletin
at www.boschpro.com. If there is evidence of soot
build-up or blockage, the heat exchanger should be
removed by a professsional and cleaned thoroughly.
Condensate trap
• Check water level in the condensate trap, see Fig.
30.
• If appliance is out of service for more than 10 days,
fill as described on page 27.
• Check for debris and clean if needed.
6.2 Winterizing for seasonal use
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
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