Verona WALL HUNG GAS BOILER - Manual (Page 31)

15. Commissioning Cont.
15.3 Checking the gas pressure at the burner:
This boiler has been tested to the highest quality control standards.
The maximum and minimum gas pressures are already set during this quality
control process however the checking procedure must be followed to ensure
maximum operating efficiency from the boiler.
• Remove the front
panel of the case.
• Loosen the internal
screw 15 (Figure
15.4) on the Outlet
Pressure Test Point
of the Gas Valve and
connect a pressure
gauge using a
suitable hose.
E
15
16
Figure 15.4
• Set the c.h.
temperature control
knob to its maximum
position. If external
controls are
fitted (e.g. room
thermostat) ensure
they "call for heat".
• Switch on the boiler.
• Check the maximum
gas pressure and
compare the value on
the gauge with the
value indicated in the
Section 2 on page 10
(gas pressures at the
burner).
• Check the maximum
gas flow at the gas
meter and compare
the value indicated in
the section 2 on page
10 (gas flow rate).
• Switch off the boiler.
• Disconnect the gas
modulator coil by
removing the electrical
connector E (Figure
15.4).
• Switch on the boiler.
• Check the minimum
gas pressure and
compare the value on
the gauge with the
value indicated in the
Section 2 on page 10
(gas pressures at the
burner).
• Switch off the boiler
and re-connect the
electrical connector E
to the modulator coil.
• Switch on the boiler.
• Check that the boiler
lights up uniformly.
• Switch off the boiler,
turn off the hot water
taps and disconnect
the pressure gauge.
Important: after the
checks all of the test
points must be sealed.
RIVA HEAT ONLY MANUAL - REV A 31