Operation - GEM R677 Operating Instructions Manual

13 Operation

Handwheel can become hot during opera-
tion!
▶ Risk of burns
Ensure protective gloves are worn
●
when operating handwheel.
Optical position indicator
Valve open
Handwheel locknut GEMÜ 677 (optional)
Lock the handwheel:
Insert the key in the lock (arrow), press down and lock with an
anticlockwise rotation. The key can be removed.
Unlock the handwheel:
Insert the key in the lock (arrow) and unlock with a clockwise
rotation. The key cannot be removed.
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CAUTION
Valve closed
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13 Operation
GEMÜ R677