64
UTD.123.2019-10.00_EN
TCA 2BA Thermostat
II 2 G Ex d IIC T6 IP65
II 2 D Ex d IIC T85 °C IP65
It is a thermostat for oil with following features:
– Scale: the instrument is fitted as standard with an approximate scale of the set point indication;
– Body: alluminium alloy, copper and copper alloy free;
– Vapor tension sensor;
– Cable entry Ø 1/2”-14 NPT-F
– Cable entry Ø 1/2"-14 NPT-M;
– Setting range -40
÷
+170 °C;
– Maximum bulb tempe180° C
– Current carrying capacity 15 A at 220 V (a.c.); 2 A at 24 V (d.c.)
– SPDT contact.
Installation and maintenance
Assemble thermostat in the proper hole of gear reducer (see position indicated in the enclosed SPT sketch).
Carry out electrical connections according to the current standards. Protect the body of the thermostat
if there may be a risk of being damaged by foreign particles. The connection of the thermostat shall be
made by cable entries or a stopping box of a flameproof type, certified EExd IIC (for B121-120) or EExd IIB
(for TRI120) .
The thermostat must not be altered or modified: if
modification is necessary consult Rossi.
When the thermostat has an external and an internal
grounding terminal, the internal grounding terminal
shall be used as
primary
equipment grounding means
whereas the external grounding terminal is only for
a supplementary (secondary) grounding connection
where local authorities permit or require such a
connection.
Carry out periodical checks to verify that the whole
equipment is efficient according to table 14.3.
To
prevent ignition of hazardous atmospheres,
disconnect circuits before opening the thermostat.
Attention! Assemble
and
disassemble the sensor
with gear reducer without oil.
Setting
The thermostat is to be set for a maximum threshold
temperature of 85° C. If, after commissioning (when
gear reducer or gearmotor reaches steady thermal
conditions) the oil temperature
T
oil and ambient
temperature Tamb can be measured, set the unit at
the lower temperature between the following two:
–
T
calculation
=
T
oil [°C]
–
T
amb [°C]
+
45
[°C]
–
T
alert
=
85
[°C]
The
machine block
temperature cannot exceed
T
stop
=
100
[°C].
Fig. 11.3.3
Содержание Rossi A Series
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