Robur GAHP Line AR Series, Installation, Use And Maintenance Manual

Page: 75 / 100

First start-up and maintenance section
Ed. 2014-08
71
Regulation of gas flow
In the phase of first activation of the appliance, regulation of gas flow to the burners
of the units of the appliance must be carried out exclusively by an authorized Robur
Technical Assistance Centre (TAC). In this phase, NEITHER the user NOR the
installation technician is authorized to perform such operations; this could invalidate
the guarantee of the appliance.
The appliance is supplied with all of its units already regulated for the type of gas for
which the appliance itself is set up. The type of gas for which the appliance is set up can
be identified from the adhesive label located on the internal air blower of the units.
During the first activation procedure it is in any case necessary to perform checking and
regulation of pressure at the burner of all units of the appliance.
On each unit, proceed as follows, referring to the parameters indicated in Table 21 on
page 72 and to the Figure 32 on page 72:
You will need: the appliance connected to the gas and electricity supply, switched
off, with the gas valve closed and the front panel removed
Check the static gas mains pressure:
1. Unscrew the fixing screw of the gas pressure intake (detail B in Figure 32 on page
72).
2. Connect the manometer to the gas intake (mains pressure).
3. Open the gas valve.
4. Read the value of the static gas mains pressure on the manometer and check that
the value read is correct:
- 7 in
WC
for natural gas (G20)
- 11 in
WC
for L.P. gas.
5. Close the gas valve.
6. Remove the manometer and retighten the fixing screw of the gas pressure intake.
Regulate the gas flow:
7. With gas valve closed, unscrew the fixing screw of the gas pressure outlet (detail C,
Figure 32 on page 72).
8. Connect the manometer to the gas pressure outlet.
9. Open the gas valve.
10. Supply electrical power to the appliance (and to the DDC, if connected).
11. Start the appliance via the on/off commands (or via the DDC, if connected and in
controller mode).
12. Wait for the burner to ignite. If ignition fails at the first attempt, the flame control unit
makes three further attempts. If the burner fails to ignite at the fourth attempt, the
flame control system is arrested. In this case, reset the flame control box via the
electronic board (or the DDC, if connected) and repeat point 11 until successful
ignition of the burner is achieved.