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1.13 Control panels that can be combined
The control panels that can be combined with the RTT boilers are
those shown below, which take into account the various op-
erating functions, the requirements of the heating installation
and the various devices used on it.
TECH PRIME only for heating (1 direct zone) with one-stage or two
stage burner.
TECH PRIME ACS for heating (1 direct zone) and production of do-
mestic hot water with one-stage or two stage burner.
9
When the TECH PRIME control panel is installed, on the boiler
return line (cold water), there needs to be a well for housing
the probe. For the accessories codes, see the price list.
9
Boilers in the RTT 163-355 range have a maximum operating
temperature of 110°C.
9
Before placing the electrical panel on the top panel it is nec-
essary to fit the relative shim supplied with the boiler. For
more details, see the assembly manual.
1.14 High performance cast iron elements
The 3-passageway system brings about the forced circulation of
the combustion gas inside the boiler three times before it comes
out of the discharge pipe. In this way, all the useful thermal en-
ergy is transferred to the water inside the elements. The opti-
mised combustion chamber and the excellent thermal insula-
tion provide maximum energy efficiency.
The combustion chamber of the boiler has a positive pressure.
The boiler operates according to the principle of 3 horizontal
passageways.
1.15 Ventilation of the boiler room
The constant ventilation of the boiler room is important for three
reasons:
1
Air is required for the boiler's combustion process.
2
Air is required to prevent the formation of dirt and dust and
for the emission of the gases and the depletion of the fuel.
3
Air is required to prevent the boiler room overheating.
Ventilation for the first two reasons is always required. In the
third case, ventilation is needed above all for boilers that also
operate in summer.
The maximum temperature of the boiler room should be 32 °C
and the room should be protected from frost.
Combustion gas pipe
Type of boiler
dimensions (mm)
RTT 163
RTT 195
RTT 227
RTT 259
RTT 291
RTT 323
RTT 355
12
3rd pass
(smoke channels)
2nd pass
1st pass
Flue gases
pipe
(methane gas) (m)
30.27
180
43.59
43.33
180
62.39
15.78
250
22.72
20.55
250
29.59
25.94
250
37.35
31.96
250
46.02
38.61
250
55.59
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