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5 Settings
Setting the lim-
its according to
specific system
characteristic
5.1.3 TB, STB (code 7-F or 70-F)
18
Open the housing.
Warm up the temperature probe – in the system – to the intended limit
temperature (allow at least 5 minutes for the temperature to equalize), while
using a calibrated reference measuring device to measure and observe the
precise temperature at the temperature probe.
Determine the required switching position (circuit 1-4 opens and circuit 1-2
closes) by rotating the setpoint spindle ( 1 ) from the end of the scale in the
direction of the start of the scale.
Secure this setting by sealing the setpoint spindle ( 1 ), for instance with
"red" thread sealing wax, temperature resistant to at least +80°C.
( 1 )
( A )
A = secure the limit setting by sealing the setpoint spindle
with "red" thread sealing wax.
( 2 ) reset arm
Important note for setup and operation!
When the thermostat is used as a safety device for explosion protection in
accordance with EU Directive 94/9/EC Annex II Sec. 1.5, a functional test is
required that conforms to the applicable regulations.
In addition, suitable measures (such as calculation, thermal testing of
individual items) must be used to document that the switching point set by the
manufacturer prevents the temperature exceeding the given limit. The specific
local and operating conditions must be taken into account, such as:
- the probe geometry and thermal coupling
- the maximum ambient temperature
- the maximum product temperature
- The limit setting is fixed at the factory.
- Alteration is not permitted.
"Opening the surface-mounting thermostat", page 9
( 1 )
( 2 )
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