35Installation and maintenance manual ecoTEC
5.7 Adjusting the pumping capacity
Only in ecoTEC plus:
The capacity of the two-stage pump can be adjusted to
the requirements of the heating system. If needed,
change the setting of the operating mode dependent
pump speed under the diagnosis point “d.12” (see
Section 8.1.2).
5.8 Adjusting the discharge valve
The appliances have a discharge valve.
The pressure can be adjusted between 170 and 350
mbar. Approx. 250 mbar is preset (mid-position). The
pressure changes by approx. 10 mbar each time the
adjusting screw is rotated. By turning right, the pressure
increases and turning left decreases it.
1
Fig. 5.11 Adjusting the discharge valve (in 800 series)
1
Fig. 5.12 Adjusting the discharge valve (in 600 series)
• Regulating the pressure on the adjusting screw (1).
5.9 Checking the gas setting
5.9.1 Factory setting
Caution!
Before operating the boiler check the data
badge and ensure that the correct gas type
appliance has been installed.
The boiler is supplied ready adjusted and no further gas
adjustments are necessary, however both the gas inlet
working pressures and maximum gas rates should be
checked as detailed in 5.9.2 and 5.9.3.
5.9.2 Gas inlet working pressure
Check the inlet pressure as described below:
• Remove the front case from the boiler.
• Close the gas shutoff valve fitted to the boiler.
1
2
Fig. 5.13 Checking the gas supply pressure
• Loosen the sealing screw marked “in” (1) on the gas
valve assembly.
• Connect a digital or a U gauge (2).
• Open the gas shutoff valve fitted to the boiler.
• Put the boiler into service (refer to the Instructions for
Use supplied with the boiler).
• Check the U gauge reading and ensure the inlet gas
pressure is between the pressures detailed below.
Commissioning Part I 5
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