Thermann Owner’s Manual
4 Star Gas Hot Water Heater
11
H4127 Rev. B
Commissioning Adjustments
Note: Commissioning adjustments
can be done only by a licensed
tradesperson.
Main Gas Pressure Regulator
Adjustment
the main burner pressure must be set
at installation and should not need
readjustment.
the pressure is best checked by
connecting a water manometer or
equivalent to the test point nipple on
the gas control. the test point pressure
must comply with the value on the
data label.
If adjustment is necessary, proceed as
follows:
1. Remove the securing screw (1)
from the top of the gas Control
and lift the plastic cover (2)
upwards.
2. locate the regulator adjustment
screw on the lower left hand side
of the gas Control (3).
3. light the burner. Rotate
adjustment screw clockwise to
increase, or anti-clockwise to
decrease pressure.
4. Replace the plastic cover and
securing screw.
Note:
For propane water heaters,
the pressure adjustment is at the gas
cylinder regulator. adjustment should
be conducted as required to ensure
correct supply pressure to water
heater as per as/nZs 5601.1.
Ignition System (Spark Gap)
Check the gap between the spark
electrode and the pilot burner is 3 –
5mm and adjust as necessary. Push the
igniter button to test for a spark.
Warning:
test the spark gap only
where there is no build up of gas.
Test The Water Heater
test operation by lighting the water
heater (see
Lighting the Water Heater
,
earlier in this manual).
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3
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