Data subject to change without notice | Printed in the USA | BTC 722002307 A | 01.2014
Bosch Thermotechnology Corp.
Triac Printed Circuit Board Replacement | 3
Re
fi
tting the circuit boards
1. Lay the new printed circuit board on a work surface. Using the
syringe or small packet supplied squeeze a small amount of
white heat transfer paste onto the metal underside of each of
the triac switches (Fig. 8). This should be approximately the size
of the head of the triac
fi
tting screw (¼” diameter).
WARNING
AN INADEQUATE AMOUNT OF HEAT SINK PASTE
CAN LEAD TO TRIAC FAILURE AND OVERHEATING,
CAUSING THE THERMAL CUT-OUT TO TRIP.
Fig. 8
2. Reassemble the printed circuit boards to the moulding by
slotting in one end and then rotating clockwise to click into the
latch on the moulding (Fig. 9 & 10).
Fig. 9
Dual triac printed circuit board
Slot in here
Snap in here
Fig. 10
Single triac printed circuit board
Slot in here
Snap in here
3. Using the Phillips head screwdriver (ideally with a magnetic bit)
insert the screw with lock washer through each of the triac
switches and lightly engage the thread (Fig. 3 & 4). Insert all
screws (1 or 2) before tightening hand tight without damaging
the screw head.
WARNING
INADEQUATE CONTACT BETWEEN THE TRIAC
BASE AND THE BRASS HEATING ELEMENT
ASSEMBLY CAN LEAD TO TRIAC FAILURE.
ENSURE ALL SCREWS ARE TIGHT AND CONTACT
IS SUFFICIENT (SEE FIG. 11).
Fig. 11
