Samson EB 2111 - Replacing the Control Thermostat

EB2111/2121/2123 EN 9-5
Servicing
9.3 Service work
Î Before performing any service work,
preparations must be made to the regu-
lator(seesection9.1).
Î After all service work is completed, check
the regulator before putting it back into
operation (see the 'Testing the regulator'
section).
9.4 Replacing the control ther-
mostat
Î See Fig.9-1
Risk of personal injury due to pressurized
components and process medium being dis-
charged.
Incorrect opening of pressure equipment or
mounting parts may lead to the process me-
dium escaping to the atmosphere.
Î Do not loosen the control thermostat
while the valve is pressurized.
Î Do not start up the regulator until all
parts have been mounted.
WARNING
!
Removing the control thermostat
1. Put the regulator out of operation (see
the 'Decommissioning' section).
2. Unscrew the coupling nut (11) of the op-
erating element (8) from the valve.
3. If applicable, unscrew the coupling nut
(16) from the control thermostat and pull
out the control thermostat.
4. If the thermostat still works, adjust the
highest possible temperature set point,
causing the pin (9) of operating element
to detach itself from the plug stem of the
valve. Then remove the control thermo-
stat.
Mounting the control thermostat
1. Place the operating element (8) on the
valve and fasten tight the coupling nut
(11).Observethespeciedtightening
torques (see 'Tightening torques' in An-
nex).
2. If applicable, push the control thermostat
into the thermowell and tighten the cou-
pling nut (16).
3. Put the regulator back into operation (see
the 'Start-up' section).