English to Russian Tech/Engineering Mechanics / Mech Engineering boiler

Boiler reconstruction from steam- to high-temperature heating. Contractor's scope of work / modified elements.

Boiler control system equipment, consisting of:
- boiler steam output control with temperature transmitter
- switch cabinet: modified elements + installation material
- burner control
- modification of **first-up fault detection**

Про "first-up" тоже хотелось бы узнать мнение.
Первичный детектор отказов? Звучит дико как-то :)