Instruction manual

Hallett 13 & 30 Instruction Manual - Wastewater & Reuse

There is a knockout provided at the base of the front cover for cable entry. See

Figure 1F. Ensure alarm contact wires stay clear from multicolor ballast output

wires when routing them within unit.

Caution: Unplug the unit before gaining access to do any wiring.

ELECTRONIC

BALLAST

UV SENSOR ARRAY

FUSE WITHIN POWER ENTRY MODULE

SEE FIGURE 1B

TYPICAL HALLETT UNIT

CAUTION - HANDLE

CAREFULLY TO NOT

DAMAGE GREEN

RIBBON CABLE

DISPLAY RIBBON

CABLE

GRIP CONNECTOR TO

REMOVE

FRONT

COVER

DRY CONTACT TERMINALS

RATED AT 1A/24VDC MAX.

KNOCKOUT

LOCATED

HERE

CIRCUIT BOARD

WITHIN UNIT

Figure 1F

The front cover must be removed to gain access to external alarm contacts.

This is accomplished by removing the screw that secures the top cover. Remove

the top cover. Gently remove the front cover and hold it a couple of inches

off from the body of the unit. You must disconnect a thin ribbon cable that

powers the display lights – be careful not to damage it. Reach in and

disconnect the ribbon cable from the circuit board by grabbing the end black

connector (never pull on the green cable itself). The front cover will then come

free.

Proceed with inspection or repair of unit as required.

When complete, replace the front cover by first reconnecting the 6-pin ribbon

cable to the port marked ‘DISPLAY’ (ensure the black connector is aligned

properly and do not miss any pins). Place the front cover in its rest position.