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Nominal output setting:
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 on the valve No.1
(see fig. no. 14)
5. Connect the coil terminal connector of the High-Low valve no.1 and 2.
6. By using the nut wrench no. 8 turn the valve no.1 and no.2 external adjusting screws 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)
7.3.3 Heat output setting and adjusting at the boiler equipped with Honeywell
electromagnetic gas valves for the sizes with 10, 12 and 15 sections
1. Put the boiler into operation
2. Measure the gas inlet pressure.
3. Before the setting procedure itself let for a while stabilize the operation pressure conditions at the burner.
4. Connect the pressure gauges (U-tubes) to the measuring points of gas output pressure on the multi-
block.
5. 5.1. without the supreme regulation
5.2. with the supreme regulation
Switch on the boiler to the nominal output through the supreme regulation.
6. Set the nominal output by using the regulator screw (fig. no. 15).
Fig. no. 15
Gas multiblock DUNGS MB – ZRDLE 412 B01 S22
(without mounted gas fitting tightness watcher and the valve for pilot burner)
Locking screw M3
Connector for
el.connection
Regulator cover – gas
flow setting for
nominal output
Gas inlet to the
multiblock
Inlet flange
Setting of the speed for valve
with cover opening
Coil, stage 2 V2
Adjusting ring –
Gas flow setting for reduced
output– Stage 1
Gas output to the burner
Outlet flange with a probe for
gas pressure measured on
the nozzles
Points for connection of valve
pro for pilot burner.
Filter cover