In the following table, the size of the hydraulic separator diameter and
of the inlet and outlet pipes is indicated, according to the cascade
thermal power.
Thermal power (kW)
< 25
< 40
< 60
<100
<150
Note: The information provided for choosing the hydraulic sepa-
rator is intended only as general references; the ideal size must
be calculated according to the special characteristics of each
installation.
9
ERROR DISPLAY
The regulator displays failures that might have occurred to the regu-
lator itself or to the system. If a failure occurs during normal opera-
tion, you will see "Er" on the display.
50
Error explanation
1 Push the line selection button to select line 50.
2 Push the + / – buttons to select the "guasti" (failure) line.
Displayed value
0...255
Pushing the buttons
sages. Possible errors that can occur to the regulator:
Displayed value
Failure description
Vuoto
No failure
10
External feeler
30
Zone sensor error
61
Room unit error
81
LPB short circuit, or no power
82
Address conflict on LPB bus (same address several times)
86
PPS short circuit
100
Presence of 2 master timers
140
Unacceptable LPB equipment or segment number
145
Wrong type of PPS equipment
150
Boiler card general error (BMU
84
ø D (DN)
ø d (DN)
50
25
65
40
80
50
100
65
125
80
U/M
–
you can switch between the error mes-
)
For each connected device, the regulator can receive and store the
error code and the number of the connected device.
EXAMPLE
The first 2 figures indicate the error code (20).
The following 2 figures show the segment address of the damaged
device (.00).
The last 2 figures indicate the equipment address of the damaged
device (.01).
60
Boiler failures display
The RVA46.531 regulator can receive and store a boiler failure code.
1 Push the line selection buttons to select line 60.
2 Display the error code.
When the boiler does not send any error code, or is not connected,
nothing will be displayed.
The meaning of the different error codes depends on the different
boilers. Therefore, we are not giving any information about those
codes now. For more detailed explanations, please refer to the
instruction manuals of the single boilers.
If there is a boiler error, code 150 (generic boiler error) will appear on
line 50.
The purpose of the following tables is to allow resetting the default
values in the case you changed the parameters by mistake and want
to reset the original default values. Now, you must follow the instruc-
tions provided under the relevant paragraphs of the presented instal-
lations.