- 46 -
INSTALLATION
6 - GAS CONNECTION
The boiler is pre-set in the factory for
natural ga
s.
- The inlet diameter of the boiler gas pipe is 1".
- In natural gas operational mode, a gas stopcock
complying to gas regulations must be installed on
the gas inlet close to the boiler and within easy
access.
- Only use connections and gaskets that are ap-
proved for gas installation use.
- The gas pipe should be flushed before putting the
boiler into operation. This is to evacuate any par-
ticles created by welding or fitting connections.
- Never flush the gas pipe whilst the boiler is ope-
rational (Max Gas Pressure = 100 mbar).
- The gas pipe to the boiler should not cause load
losses in excess of 1 mbar (10 mm
WG
).
Example: For natural gas type G20, 20 mbar for
10 metres of piping and 4 bends: minimum dia-
meter 20/22.
7 - ELECTRICAL CONNECTION
- The electrical connection and all the equipment
used to make this connection must be in confor-
mity with the codes of practise in force (according
to the installation standards),
- the premises must be suitable in terms of boiler
protection IP 44 (model C
13
- C
33
) - IP 24 (model
- B
23
),
- Electrical connection of the boiler to the mains
using the supply cable.
- Power supply: 230 V - 50 Hz (single phase),
- Respect the Live-Neutral polarities,
- Earth connection compulsory.
To connect the sensors to the X10 or X11 terminal
of the LMU management please refer to the connec-
tion diagram on section 7.4 - page 47 or to the sen-
sor.
If a fault code is displayed when fitting
the sensor to the LMU management
unit please refer to chapter IX - OPE-
RATING FAULTS.
In compliance with the regulations, a safety system
must be installed. This system must be separate
from the temperature control, feature a manual re-
set, and must cut off the supply of heat and operate
even when there is no current or motor fluid (accor-
ding to the installation standards).
- Terminal X10-03: Under-floor heating safety con-
nection (limiter) (fig. 54 - page 47),
- Terminal X3-01: Under-floor heating safety con-
nection (manual reset) (fig. 54 - page 47).
!
7.1 - Mains connection
7.2 - Connection of the sensors to the LMU
management unit
!
7.3 - Under-floor heating safety
Summary of Contents for THI 5-25c
Page 62: ... 77 NOMENCLATURE THI 5 25 C ...
Page 65: ... 98 NOMENCLATURE CONTROL BOX ...
