Appendix
0020134823_04 ecoTEC plus Installation and maintenance instructions
41
No.
Work
Inspection
(annual)
Mainten-
ance
(at least
every
2 years)
8
Check, and if necessary correct, the charge pressure of the expansion vessel.
X
9
Remove the gas-air mixture unit (burner door with fan and gas valve).
X
10
Check all seals and the insulating mat in the combustion area. If you notice any damage, replace
the seals or insulating mat. Replace the burner door seal after
each time
it is opened and, ac-
cordingly,
each time
maintenance work is carried out.
X
11
Clean the heat exchanger.
X
12
Check the burner for damage and replace it if necessary.
X
13
Check the condensate trap on the product, clean and fill if necessary.
X
X
14
Reinstall the gas-air mixture unit.
Caution: Replace the seals.
X
15
Replace the ignition and monitoring electrodes and the associated seals.
X
16
Motorised flue non-return flaps for cascade operation: Check that the flue non-return flap func-
tions faultlessly. If required, clean the inside and outside of the casing, as well as the shut-off
disc and the shaft.
X
17
Open the gas isolator cock, reconnect the product to the power mains and switch the product on.
X
X
18
Open the service valves, fill up the product/heating installation to 1.0-4.5 bar (depending on the
static height of the heating installation) and start the purging programme
P.00
.
X
19
Perform a test operation of the product and heating installation, including hot water generation,
and purge the system once more if necessary.
X
X
20
Visually inspect the ignition and burner behaviour.
X
X
21
Check the CO
₂
content (the air ratio) of the product again.
X
22
Check the product for gas, flue gas, hot water and condensate leaks, and repair if necessary.
X
X
23
Record the inspection/maintenance work carried out.
X
X
24
Check the quality of the heating water (hardness level) and log the values in a system book. If
required, use water treatment to correct the water hardness.
X
X
D
Status codes
–
Overview
Status code
Meaning
Heating mode
S.00
Heating: No heat demand
S.02
Heating mode: Pump pre-run
S.03
Heating mode: Ignition
S.04
Heating mode: Burner on
S.05
Heating mode: Pump/fan overrun
S.06
Heating mode: Fan overrun
S.07
Heating mode: Pump overrun
S.08
Heating mode: Remaining anti-cycling time
S.09
Heating mode: Measuring program
S.20
DHW demand
S.22
DHW mode: Pump pre-run
S.23
DHW mode: Ignition
S.24
DHW mode: Burner on
S.25
DHW mode: Pump/fan overrun
S.26
DHW mode: Fan overrun
S.27
Hot water handling: Pump overrun
S.28
DHW mode: Burner anti-cycling time
Special cases
S.30
Room thermostat (RT) is blocking heating mode
S.31
Summer mode active or no heat requirement from eBUS controller
