GESTRA UNA 38, Original Installation Instructions

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The torques required for tightening threaded
connections vary depending on the type of
equipment and connection.
Designation Torque [Nm]
UNA 38 UNA 39
Set screws 20 20
Hex nuts on set screws 270 340
Allen screws on control
unit – 40
Regulating nut 120 –
Bimetallic vent 90 –
Manual vent valve 70 170
Manual lifting lever 110 –
Screw plug 110 –
Drainage screw plug 70 170
Malfunctions may occur if the equipment is
used with different types of condensate:
The following condensates in particular
cause problems:

very oily condensates
 condensates that resinify or become
gummy
 condensates that recrystallize

condensates that contain solid matter.
In these cases check the equipment at
regular intervals for contamination and, if
necessary, remove dirt deposits.
To reduce contamination we recommend
installing a sedimentation vessel or a dirt
pocket arrangement upstream of the
equipment.
Normally you do not have to clean the internal parts
of the equipment.
To clean the equipment completely take off the
cover and remove the control unit.