Installation, wiring, and commissioning of the high temperature limit switches for the T1 and T2 cooling packages was completed today as part of SAS project SASP0120.  The relay output from the switches was wired in series with the Central Safety System signals for T1 and T2 (cable number 13250 and 12250 respectively) in break-out panel #2 on the Meson Hall south mezzanine.  There were already 3 other circuits wired in series with each signal for various other interlock requirements.

After wiring, commissioning of the switches was performed according to the following procedure:

- With the limit switches in a non-tripped state, it was confirmed that the safety signals were reaching the CSS in the main control room as expected (had to jumper T2 circuit to achieve this as the T2 target is not currently installed)
- The limit switch was tripped by adjusting the set point on the switch, it was confirmed that the signal was lost
- The set point was changed to a non-trip level, and the switch trip cleared, confirmed that the signal in MCR returned
- The enable signal from each cooling package was removed by shutting off the cooling package (for T2 just removed jumper), confirmed that safety signal lost as expected
- Reversed this condition and confirmed that the signal returned
- Checked that the thermocouples are performing properly, and the switches actually trip on high temperature by directly applying heat to the thermocouple area on the cooling package using a heat gun;  the switches tripped as expected when the set-points were exceeded

The results were discussed with John Drozdoff (Safety Systems group leader) who approved the method.

The final task remaining for SASP0120 is to route the PRV outlets to the 1A tunnel active drain using flexible hosing.