Accorroni AS COND, Руководство по установке

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7
CONSTRUCTION EXAMINATION AND SAFETY REQUIREMENTS
The warm air heater consists of an aluminium frame and an external panelling in pre-painted sheet metal: the panels are
internally insulated with a glass wool mat.
In the heating section we find a combustion chamber and a heat exchanger.
In this area, the insulating mat is protected against the danger of overheating by a galvanized sheet cover.
In the fan section, located in the lower part of the warm air heater, there are one or more double inlet centrifugal fans,
individually driven by a three-phase electric motor / s with belt drive / s.
The fan unit is protected by an anti-finger grid that prevents accidental contact with parts of the body and the entry of leaves
or external objects.
It is designed to prevent the entry of a ball with a diameter of 16 mm, with a force of 5N.
The grid can only be removed with the aid of a tool.
The combustion chamber, built in stainless steel for high temperatures, is fixed to the frame so that its thermal expansion
does not compromise its duration over time.
The heat exchanger made with stainless steel tubes is solidly welded to the combustion chamber.
Suitable openings on both sides allow easy access for inspection and maintenance.
On the front side of the warm air heater we find:
- a plate to fit the automatic forced draught gas / fuel oil burner
- an electric control board complete with
- switch
- HEATING / VENTILATION / BURNER STOP switch
- voltage indicator
- remote switch thermal intervention light (only in 3F models)
- Safety Limit intervention light;
a combination of 3 thermostats (TRITHERMOSTAT) ensure the following control and safety functions:
-
FAN (TR):
thermostat normally open for the automatic start and stop of the fan unit in
"HEATING" phase;
-
LIMIT (TW ):
burner maximum thermostat, normally closed with automatic reset.
o Automatically turns off the burner to prevent the air temperature at the warm air heater
outlet exceeding the safety limit;
-
LIMIT2 (STB):
burner safety thermostat, normally closed with manual reset and a positive security.
o Automatically turns off the burner to prevent the air temperature at the warm air heater outlet from
exceeding the safety limit set by the reference standard.
Its calibration is imposed at 100°C by the manufacturer and must not be modified to avoid overheat of the
warm air heater;
(to reset the burner, read the instructions in the Chapter:
TRI-THERMOSTAT
).