26
EB 2183 EN
Operation
6.2
Fine adjustment of the limit
temperature
Risk of bursting in pressure equipment.
Valves and pipelines are pressure equip-
ment. Improper opening can lead to valve
components bursting.
− Before starting any work on the valve, de
-
pressurize all plant sections affected as
well as the valve.
−
Drain the process medium from all the
plant sections affected as well as the valve.
−
Wear personal protective equipment.
Risk of personal injury due to residual pro-
cess medium in the valve.
While working on the valve, residual me-
dium can flow out of the valve and, depend
-
ing on its properties, cause personal injury,
e.g. (chemical) burns.
−
If possible, drain the process medium from
all the plant sections affected and the
valve.
−
Wear protective clothing, safety gloves and
eye protection.
DANGER
!
WARNING
!
Risk of burn injuries due to hot or cold com-
ponents and pipelines.
Depending on the process medium, valve
components and pipelines may get very hot
or cold and cause burn injuries.
−
Allow components and pipelines to cool
down or warm up to the ambient tempera-
ture.
−
Wear protective clothing and safety gloves.
In case you want to make fine adjustments to
the safety temperature monitor or the limit
value deviates, proceed as follows:
Fine adjustment using a thermometer in
-
stalled in the plant
1. Adjust the limit temperature of the safety
temperature monitor to approx. 10 K be-
low the required limit (see section 6.1).
2. When a control thermostat is mounted
on the safety temperature monitor, adjust
the limit temperature to approx. 10 °C
above the limit temperature.
3. Read the resulting temperature at the
thermometer installed in the plant (after
approx. 5 min.).
4.
When the limit temperature is still too
low:
slowly turn the rotary knob (12) at the
safety temperature monitor clockwise to
increase the limit until the temperature at
the thermometer reaches and remains at
the limit temperature.
After the temperature reaches the limit
temperature:
WARNING
!