O2
7.5
functional tests
7.7 Final work
change settings
6720813046-48.2TD
To assemble the casing of the device and the hot water tank, reassemble all the
parts in reverse order.
GC9000iW 40 H 23
In order to ensure correct functioning in overpressure operation of max. 25Pa
or max. 70Pa, the minimum nominal heat output must be increased (at 25Pa all
devices at full load, 1 device at partial load, at 70Pa all devices at full load).
The minimum nominal heat output can be increased to the minimum partial
load via the settings menu.
Min. part load % no
overpressure operation
LPG (butane)
ÿ For protection against the formation of legionella, reference
is made to the DVGW worksheet W551 (ÿ Chapter 3, page
11).
ÿ Enter the CO2 or O2 values in the commissioning report.
CO2
11,9%
Figure 30 Remove the seal
Tab. 14 Set min. partial load overpressure operation
ÿ Press the h or g arrow button to select the minimum nominal heat output.
GC9000iW 20 E 23
CO2
15%
10,2%
ÿ Tighten the screw on the adjustment nozzle.
ÿ Remove the seal on the adjusting screw of the gas fitting and
Proceed as follows:
or Set O2 value for minimum nominal heat output.
ÿ Set the heat output via the settings menu (ÿ >SETTINGS
> LIMIT VALUES> MIN. UNIT POWER) (ÿ Chapter 8.4, page 24).
13%
ÿ After completing the work described below, fill out the commissioning report
(ÿ Chapter 7.8).
Tab. 13 CO2 and O2 values
The thermal disinfection temperature is set on the control unit between 60 °C and
80 °C.
Min. part load %
overpressure operation
ÿ Remove the flue gas probe from the flue gas measuring socket and plug
14%
The display shows POWER MIN. (low load) on.
7.6
ÿ During commissioning and the annual inspection, all regulation, control and
safety devices must be checked for their function and, if adjustment is
possible, for their correct setting.
16%
11,2%
ÿ Seal the gas fitting and adjustment nozzle.
ÿ Press the chimney sweep button or the back button.
17%
Observe the table below.
GC9000iW 50 H 23
Gasart
The basic setting is 60 °C.
4,3%
4,6%
O2
9.5% 4.0%
[1] Lead
7.5.2 Thermal disinfection hot water
assemble.
GC9000iW 30 E 23
ÿ Measure the CO2 or O2 value.
ÿ Check the gas and water side for leaks.
7.5.1 Set overpressure operation
5,5%
8,6% 5,5%
device type
Natural gas E, natural
gas LL LPG (propane)1)
The device returns to normal operation.
WARNING: due to legionella formation.
maximum nominal
value meleistung
13%
10,8%
3,2%
minimal nominal
value meleistung
23%
ÿ Check the setting again at maximum nominal heat output and minimum nominal
heat output and adjust if necessary.
Measure CO, the value must be less than 250 ppm.
20 | Installation
10%
1) Standard value for liquid gas for stationary containers with a capacity of up to 15,000 l.
6720813052 (2016/10)
Cerapur GC9000iW
1
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