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- Only use connectors and seals that are authori-
zed for use with gas.
- Flush the gas piping before connecting the boiler
so as to evacuate possible residue created by
welding and connections.
- Never test the gas piping when the boiler is con-
nected (Pgas maxi = 60 mbar).
- The gas inlet piping to the boiler must not cause
a pressure drop of over 1 mbar.
- A stop valve that meets gas regulations must be
fitted near the unit and must remain accessible.
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The RVA 47 does not enable the connection of an
external solenoid safety valve in the case of liquid
gas operation.
The only possible programming is located on the
LGM (programming output ST9 as a signalling out-
put).
However, the standard setting of the RVA 47 of the
THR 10-100 allows an automatic LGM cascade
mode switching according to a set number of hours
(500 h). It is therefore necessary to adapt parameter
setting of the switching mode on the RVA 47 accor-
ding to the solution chosen hereafter.
Note:
- The number of LGMs in the system can be:
• 2 for a single THR 10-100,
• or a multiple of 2 in the case of a THR 10-100
cascade installation.
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Index 5 programming at signalling output:
Output ST9 live at phase 30 (ventilator power in-
crease), at phase 50 (end of heat request by the re-
gulator).
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Current:
AC - 230 V + 10 % / - 15%
I < 1.0 A ; cos
ϕ
> 0.8
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Cascade boiler switching
---
No automatic switching (fixed boiler sequence)
10...990
Switching according to the number of hours set
--- / 10...990
- / hour
10
500
Boiler exclusion by automatic sequence permutation
0
none
1
first boiler
2
last boiler
3
first and last boiler
0...3
-
1
0
Main boiler for the fixed sequence
00.1...16.3
-
01.1
-
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