1. NA62 - GTK Procedure to switch ON/OFF the Cooling Plant version 0
Introduction
This procedure is rather a preparation of the Stations for the switching ON/OFF, while the actual power ON/OFF is done by EN-CV personnel.
The Cooling Plant operates on three Stations, thus the procedure to prepare the switching ON/OFF of the Plant has to be repeated three times, once for each Station.
The sketch of a Station is the following: Vi
Detector Vb Vo
By-pass

2. 1) Preparation to switch ON the Cooling Plant
Close Vi (*)
Open Vo
Open Vb
After this operation, the Detector is in a safety state and the liquid would go through the by-pass
2) Switch ON the Cooling Plant
Whenever the Cooling Plant is stable (one minute or so) with pressure and flow at the nominal values, one can switch from by-pass to Detector by doing the followings:
Open Vo
Open Vi
Close Vb
(*) Open(ON)/Close(OFF): handle position

3. 3) Switch OFF the Cooling Plant
The switch off of the Cooling Plant should not do any arm to the Detector.
The good practice would be, before switching off:
Close Vi
Open Vo
Open Vb
Leaving the system ready to be switched ON again (see 1).