Maintenance and service
Greentherm T9800 SEO 160/199 | SECO 199 – 6 720 817 281 (2018/12)
34
DANGER:
▶ Replace all dismantled seals and o-rings with new ones.
▶ Consult spare part list at
www.boschheatingandcooling.com.
NOTICE:
▶ Inspect and clean the complete water heating system once
a year.
▶ Follow points 5 and 6 in Table 21 after 400 operation hours
or 25000 cycles (whichever occurs first), see
chapter 6.5.1 (Data History).
▶ Inspect the water heater and components for wear or
fatigue. Immediately repair all faults to avoid damage to the
system.
Table 16 Annual maintenance
7.1 Required annual maintenance
(To remove front cover, see page 11)
Venting System
• Venting system - before removing the front cover inspect
vent opening in the front cover 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 intake
restriction. Inspect combustion air openings for blockage
or debris.
Heat Exchanger
• Inspect burner observation window 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 4.4.1 of this
manual to verify the combustion air supply meets the
manufacturer's specifications.
Pressure Relief
• Manually open the pressure relief valve to ensure proper
operation.
Inlet Water Filter
• Verify the inlet water 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. 14, page 20). Close the installer supplied water
shutoff valve, purge the water using discharge drains, and
remove wireform spring clip from filter. Remove the filter,
clean and/or replace if damaged.
Descaling
• In areas where the water supply has a high mineral content
(see table 8, Water Quality), 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 7.3 for detailed instructions on descaling the heat
exchanger.
Condensate Siphon
• Check for debris and clean if needed.
Air Filter
• Verify if the air filter is clean and undamaged.
The air filter is attached to the fan assembly, see fig. 36.
• Air filter must be replaced in case it is clogged or damaged.
How to remove air filter
▶ Disconnect the electrical supply from the water heater.
Annual maintenance table
Every year
1. Inspect venting system X
2. Inspect combustion chamber X
3. Inspect burner X
1)
1) Proceed with air filter cleaning or replacement if error code
CE, CF and C2 is displayed. Check the flue exhaust for
blockage (appliance is protected against flue blockage).
4. Inspect pressure relief X
5. Inspect water filter X
6. Heat Exchanger Descaling X
2)
2) Proceed with heat exchanger descaling whenever error
codes AA and E5 are displayed (appliance is protected
against over heating in case of scaling, see table 8, Water
Quality).
7. Inspect condensate trap X
8. Inspect air filter X
1)
To Next Page
Loading...
