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9.2
MEASURING GAS PRESSURE
Confirm gas pressure after installation.
CONNECTING GAS PRESSURE GAUGE
B Shut off gas supply.
B Remove the front cover (
B Loosen screw inside left test point fitting (do not
remove) and connect gas pressure gauge tube to test
point.
Fig. 54 Gas pressure test point (left test point)
STATIC PRESSURE TEST
B Turn gas supply back on.
B Record static gas pressure reading in table 15.
Static Gas Pressure Reading
Pressure: ___________________ Date: ___________
Operating Gas Pressure Reading
Pressure: ___________________ Date: ___________
Tab. 15
OPERATING PRESSURE TEST
B Press ON/OFF button to turn off the appliance.
6 720 646 322 (2012/05)
Fig. 24).
6720608920-16.1AL
B Press and hold "Program" button and press ON/OFF
button to turn appliance ON (
Fig. 55 Gas setup mode
B As soon as '188' is displayed, release "Program"
button
, and the display reads P2.
B Press
or
until P1 appears.
+
NOTE: While in this mode, the appliance will
run constantly at maximum output and allow
maximum water flow.
For inlet gas pressure adjustment see values in table 16:
Gas type
NG
mbar
20
Tab. 16
B Turn on high volume of hot water flow (at least 15 l/
m) and burner will light. If heater display reverts to
P2, open more hot water draw off points to allow
sufficient flow. Press
display.
B Operate all other gas appliances on same gas supply
at maximum output.
B Record lowest operating gas pressure reading in
table 15.
Gas pressures lower than 20 mbar for Natural Gas or
27-30/37 mbar for LPG will result in reduced
temperature rise to the hot water being used,
reduced hot water volume, possible error code faults
and must be corrected.
Check gas pipes dimensions.
9.3
ADJUSTING CO
The CO
shall only be adjusted by a Gas Safe
2
registered installer with a calibrated CO
analyzer.
COMMISSIONING
Fig. 55).
6720608920-17. 1 AL
Propane
37
until P1 reappears on the
+
(CARBON DIOXIDE)
2
2
37
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