Dip-Switch Selectors - Biasi RIVA COMBI Service Manual

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Third Part
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The green lamp on the left gives information
whether the boiler is in stand-by mode or during
the normal operation of the boiler.
The following table gives the relationship
between the lamp indication and its meaning.
With the boiler switched ON ( winter or summer)
all the lamps (G in Figure 1) are activated.
The following table gives the relationship
between each of the possible lamp combinations
and their meaning.
RIVA COMBI SERVICE MANUAL – REV A
(edition-0106)
Figure 4
Figure 5
5

Dip-switch Selectors

The function selectors H (Figure 1) are
microswitches with which it is possible to select
the various boiler control function modes.
In Figure 6 the selectors are illustrated in the
configuration in which the boiler is set in the
factory (natural gas boiler).
Minimum gas pressure adjustment
Gas conversion
Ignition gas pressure adjustment
Reignition frequency
1 2 3 4
H
O Selector 1
This forces the boiler to operate at the minimum
gas pressure in order to allow the adjustment of
the minimum gas pressure at the burner (on the
modulation operator of the gas valve).
After any adjustment operation the selector has
to be brought back to the normal position (ON).
O Selector 2
This selects the boiler functions on the basis of
the type of gas used.
It allows the selection of the maximum supply
current given to the modulator device.
To set selector 2 correctly follow the table in
Figure 7.
Gas Suplly
Natural gas
L.P.G.
O Selector 3
This forces the functioning of the boiler in order
to allow the optimal gas pressure at the burner
to be adjusted during the ignition phase.
The adjustment is done by means of the
potentiometer J marked "ACC" (Figure 1 on page
6-1).
Control p.c.b. 11.62
ON (1)
OFF (0)
Figure 6
Position of selector
ON
OFF
Figure 7
6-3