Technical data
29
STRATA2
Table 8
DIP Switches 1-4
If the unit is converted to liquid gas, DIP switch 8 must be set to ON; this automatically lowers the
maximum speed of the combustion fan, to obtain the required capacity.
If the unit is fitted with Grundfos Pumps DIP switch 5 should be switched on, to allow the pumps to
modulate. If modulation is not required DIP switch 5 should be switched off.
If the RAV 47 has malfunctioned, DIP switch 6 may be switched to ON, as an emergency measure, after
which the unit will be kept at a steady 70ºC, independent of the heat demand. When the replacement
controller has been installed, DIP switch 6 must be set to OFF again.
6.2.3 DIP switches
The unit has a number of DIP switches that must always be set. These switches have different functions.
To access the DIP switches, the cover plate over the circuit boards must be removed.
1. Remove the two fixing screws on the lower edge of the top cover panel.
2. Slide the panel towards the front of the boiler and lift away.
3. The DIP switches are easily accessible at the left side of each control circuit board.
● The RVA 47 must be set to the number of boilers installed on one system; in bus terms, each module
has its own address number, which must be set.
● The master RVA 47 manager is capable of controlling up to four burners, and if four burners are
actually installed, four addresses must be set.
● Subsequent RVA 47 controllers are capable of controlling 2 burners – the address must be set for
each unit.
● If only one boiler is installed, two addresses must be set.
● The first four DIP switches control the PPS number allocated to the burner module.
● To enable the master RVA 47 to control modules 3 and 4, the PPS connection between boilers 1 and
2 must be installed with the correct polarity.
The suggested numbering format for the boiler modules are as follows:
Boiler with control fitted Left Circuit Board Lower Module Number 1
Right Circuit Board Upper Module Number 2
Boiler without control module Left Circuit Board Lower Module Number 3
Right Circuit Board Upper Module Number 4
Subsequent boilers with control fitted Left Circuit Board Lower Module Number 1
Right Circuit Board Upper Module Number 2
Table 7
Module Number 1 On Off On On Known as PPS #4
Module Number 2 On Off On Off Known as PPS #5
Module Number 3 On Off Off On Known as PPS #6
Module Number 4 On Off Off Off Known as PPS #7