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Setting the nominal output:
1. Put the boiler into operation.
2. For orientation measure the gas pressure on the gas distributor by using the digital manometer or
the U-tube.
3. Before the setting procedure itself let for a while stabilize the operation pressure conditions at the burner.
4. Connect the manometer (U-tube) to the measuring point of the output gas pressure
5. Connect the coil terminal connector of the High-Low valve.
6. By using the nut wrench no. 8 turn the valve external adjusting screw for setting the nominal output.
When turning clockwise the gas overpressure keeps increasing and other way round it keeps
decreasing.
7. After the adjustment completion check the correctness of set values after having switched on and
switched off the terminal connector repeatedly several times.
8. Measure the gas flow on the gas meter; if it doesn’t correspond to the nominal output (see tab. no. 2) –
set the gas pressure at the nozzle in a way making sure that the required gas flow will be achieved.
9. Put on the plastic protective cover on the High-Low coil.
10. Check the combustion purity by using the combustion gases analyser (NOx, CO).
7.3.2 Heat output setting and adjusting at the boiler equipped with Honeywell
electromagnetic gas valves for the sizes with 10, 12 and 15 sections
Reduced output setting and adjusting:
1. Put the boiler into operation
2. Measure the gas inlet pressure which must be between 15 and 23 mbar.
3. Before the setting procedure itself let for a while stabilize the operation pressure conditions at the burner.
4. For orientation measure the gas pressure on the gas distributor by using the digital manometer or the U-
tube.
5. Remove the plastic cover from High-Low coils.
Fig. no. 14
Honeywell gas valves connection
6. Disconnect the coil terminal connector of the High-Low valve no.1 and 2.
7. Connect the manometer (U-tube) to the measuring point of the output gas pressure on the valve
VR 4601 QB 2001.
8. By using a 3.5 mm screwdriver regulate through the internal screw on both regulators the pressure value
of a reduced output according to table no. 2. By turning clockwise the gas overpressure keeps increasing
and other way round decreasing.
9. Measure the gas flow on the gas meter; if it doesn’t correspond to the nominal output (see tab. no. 2) –
set the gas pressure at the nozzle in a way making sure that the required gas flow will be achieved.
10. Check the combustion purity by using the combustion gases analyser (NOx, CO).
High – Low coil No. 2
terminal connector of
the elektromagnetic
coils on valve no. 2
valve no. 2
High – Low coil no. 1
terminal connector of the
elektromagnetic coils on valve
no. 2
valve No.1