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Location
Permissible temperatures at instrument head/sensing element – see following table
Type
7 B 03
7 B 06
7 B 17
7 B 19
7 B 20
TKC
7 B 23
7 B 26
7 B 29
7 B 32
7 B 35
The maintenance-free, splash-proof controller is suitable for
fitting in either dry or humid rooms (IP44).
N.B.: The head of the instrument may be positioned either
above or below the sensor cartridge.
On the TKC 7 B 17, the sensor cartridge must always be fitted
facing downwards (see diagram).
On all other types, the cartridge may be fitted in any position.
Operation
If the temperature exceeds the upper switching point X
the contact switches from 1 - 2 to 1 - 3.
If the temperature falls below the lower switching point X
the contact switches from 1 - 3 to 1 - 2.
Electrical connections
Before connecting, check that the power supply complies with
the requirements stated on the specification plate.
In the head of the instrument, try to keep the wiring to the
terminals as direct as possible.
1
7
2/3 = connection to load
$ D
Setting
lower switching
upper switching
point
point
%
Permissible sensor temperature
min.
°C
–75
–40
–40
–40
–40
–40
–30
–40
–40
–40
wrong
right
%
= connection to phase
= earthing
%
– 3 –
Temperature at sensor
must be higher/lower
than at instrument
max.
°C
130
130
65
lower or higher
135
135
165
205
230
275
320
Important:
The left-hand pointer (lower switching point) must not be higher
than the right-hand pointer (upper switching point)
To set the unit, remove the sealing caps. If required, these can
be turned over and used as setting knobs.
If the unit is subjected to vibration, the adjusting knobs must be
sealed.
, then
S1
, then
S2
Permissible temperature at
instrument head
min.
head
°C
lower
–40
–30
higher
–40
MV 23155
max.
°C
70
70
70
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