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7.
Commissioning – instructions for a contracting service
organization
The boiler commissioning, setting the heat output, any interference with the boiler electric part or
connection of further control elements can only be done by a contracting service organization
authorized to do this activity.
7.1
Checking activity before commissioning
Before the boiler commissioning there must first of all be checked:
a) heating system replenishment with water (pressure gauge check)
b) thermostats setting:
safety thermostat
105 °C
boiler thermostat
(0 – 85 °C)
combustion gases reflux fuse
70 °C
c) gas inlet pressure before the boiler (pressure gauge before the main pressure valve/ gas cap 1,8 MPa)
and gas connection breathing
d) connection to the fixed 230 V/50 Hz el. network distributor with adequate protection, switching of control
(boiler, safety) thermostats and combustion gases reflux fuse according to e
Č
SN 33 2180 Art. 6.2.2.
e) connection to the chimney
7.2
Commissioning
1. Open the gas cap and water „seals“ in heating system.
Set the boiler thermostat to the max. temperature.
2. Switch the main switch on the boiler electric panel. The boiler connection to the electric network is
signalled by a green light.
3. If there is everything in a good order the pilot burner will catch fire. As a rule the ignition electrode on the
burner sparkles for 50 sec. A reduced output will be started up by the pilot burner. In case that the
ignition cycle has passed but the burner didn’t catch fire there will light up the breakdown signalling on
the network module. (see. Fig. no. 18). If the ignition fails repeatedly it is necessary to switch off the main
switch, find out the fault and eliminate it (see chapter no. 12) and then to repeat the whole process.
4. Set and regulate the boiler heat output according to the next chapter no. 7.3.
7.3
Setting and regulation of the boiler heat output
7.3.1 Setting and regulation of the boiler heat output for 8 sectional boiler size
Setting and regulation of a reduced output:
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. 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 coil.
6. Connect the manometer (U-tube) to the measuring point of the output gas overpressure on VR 4601
QB 2001valve.
7. 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 starts increasing
and other way round decreasing.
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. Check the combustion purity by using the combustion gases analyser (NOx, CO).
