6 720 680 174 (2014/05)
Therm 8000S
Installation instructions | 29
8.2 Measuring gas pressure
Confirm gas pressure after installation.
Connecting manometer
▶ Shut off gas supply.
▶ Remove the front cover (see Fig. 23).
▶ Loosen screw inside left test point fitting (do not remove)
and connect manometer tube to test point.
Fig. 48
Gas pressure test port (left tapping)
Static Pressure Test
▶ Turn gas supply back on.
▶ Record static gas pressure reading in Table 8.
Operating Pressure Test
▶ Press ON/OFF button to turn off the appliance.
▶ Press and hold "Program" button and press ON/OFF button
to turn appliance ON (Fig. 49 ).
Fig. 49
Gas tuning mode
▶ As soon as '188' is displayed, release "Program" button
, and the display reads P2.
▶ Press
or
until P1 appears.
For inlet gas pressure adjustment see values in Table 9 :
▶ 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 fixtures to allow sufficient flow. Press
until
P1 reappears on the display.
▶ Operate all other gas appliances on same gas piping system
at maximum output.
▶ Record lowest operating gas pressure reading in Table 8 .
Gas pressures lower than 2 kPa for Natural Gas or 3.0 kPa
for Butane will result in insufficient degree rise to the hot
water being used, reduced hot water volume, possible error
code faults and must be corrected.
Check gas pipes dimensions.
8.3 Adjusting CO
2
(carbon dioxide)
DANGER:
▶ The following operations must be carried
out by a qualified technician.
Static Gas Pressure Reading
Pressure: ___________________ Date: ___________
Operating Gas Pressure Reading
Pressure: ___________________ Date: ___________
Table 8
NOTE: While in this mode the appliance will
run constantly at maximum power and allow
maximum water flow.
Gas type
GN
Butane
kPa
2.0
3.0
Table 9
The CO
2
can only be adjusted by a certified
gas technician with a calibrated CO
2
analyser.
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