Lightning The Boiler; Checking The Gas Pres. At The Burner - Biasi Riva Combi Installation & Operation Instructions

15. Commissioning Cont.
Note: If external controls are fitted (e.g. room thermostat) ensure they "call for heat".
THE BOILER AND ITS GAS CONNECTION MUST BE LEAK
TESTED BEFORE THE BOILER IS PLACED IN OPERATION.
• Turn on the electricity
supply to the boiler,
switching on the circuit
breaker switch. The
appliance operation light
A will flash every 4
The boiler will now go through an ignition sequence and the burner will light.
If during the ignition attempt period the boiler fails to light, the full sequence control p.c.b. will go
to lockout and the lock-out signal lamp D will appear. To reset the boiler turn the knob B (figure
15.4) on the 0 position and then press and release the boiler reset button C (Fig. 15.4)
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 19 (Figure 15.5)
on the Outlet Pressure
Test Point of the Gas
Valve and connect a
pressure gauge using a
suitable hose.
19
20 E
Figure 15.5
• Set the d.h.w. and c.h.
temperature control
knobs to their maximum
position. If external
controls are fitted (e.g.
room thermostat)
ensure they "call for
heat".
RIVA COMBI MANUAL - REV B
15.3 Lighting the boiler:
WARNING
seconds.
• Turn the function selector
B as in Fig. 15.4 The
appliance operation light
A will flash every 2
seconds.
15.4 Checking the gas pressure at the burner:
• Switch on the boiler and
open at least one hot
water tap fully.
• 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
15.5).
• Switch on the boiler.
C
A B
Figure 15.4
• 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.
D
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