Carrier 69NT40-541-300, Операция и обслуживание, Страница: 111 / 152

6 − 23 T − 318
c. If required, prepare the replacement sensor by cut-
ting sensor wire(s) back 40mm (1-1/2 inch). For
3-wire sensors, the black wire should be cut at the
middle length and the red/white wire cut to the shorter
length (See Figure 6-26).
Sensor
40 mm (1 1/2 inch)
6.3 mm (1/4 inch)
Mounting Stud Type
Sensor
40 mm (1-1/2 inches)
6.3 mm (1/4 inch)
ÈÈ
Bulb Type
Figure 6-26 Sensor Types
d. Prepare the cables by cutting wires to the opposite of
the sensor (See Figure 6-27).
When installing a single wire color two wire sensor,
cut one wire of existing two wire cable 40mm (1-1/2
inch) shorter than the other wire.
When replacing two single sensors with a combina-
tion (3-wire) sensor, the black wires of the cables
should be cut to the same length and the red wire of
one cable cut to the shorter length.
When replacing a original 3-wire sensor, cut the black
wire to the middle length and the red wire to the short-
er length.
e. Strip back insulation on all wiring 6.3mm (1/4 inch).
f. Slide a large piece of heat shrink tubing over the
cable, and place small pieces of heat shrink tubing,
one over each wire, before adding crimp fittings as
shown in Figure 6-27.
g. If required, slide the cap and grommet assembly onto
the replacement sensor. If the replacement sensor is
of a larger diameter than the original, a different grom-
met may be required.
h. Slip crimp fittings over dressed wires (keeping wire
colors together). Make sure wires are pushed into
crimp fittings as far as possible and crimp with crimp-
ing tool.
i. Solder spliced wires with a 60% tin and 40% lead
Rosincore solder.
j. Slide heat shrink tubing over splice so that ends of
tubing cover both ends of crimp as shown in
Figure 6-27.
k. Heat tubing to shrink over splice. Make sure all seams
are sealed tightly against the wiring to prevent mois-
ture seepage.
l. Slide large heat shrink tubing over both splices and
shrink.
CAUTION
Do not allow moisture to enter wire splice
area as this may affect sensor resistance.
m.Reinstall sensor, refer to paragraph 6.24.3.
NOTE
The P5 Pre-Trip test must be run to inactivate
probe alarms (refer to paragraph 4.9).
ÈÈÈÈÈÈÈ
ÈÈÈÈÈÈÈ
ÍÍÍÍ
ÍÍÍÍ
Sensor
Cables
Heat Shrink Tubing
Large Heat Shrink Tubing
ÍÍÍÍ
ÍÍÍÍ
REPLACEMENT 2 WIRE TO 2 WIRE OR 3 WIRE TO 3 WIRE
REPLACEMENT FOR DUAL, SINGLE SENSOR CONFIGURATION
ÈÈ
RED
BLACK
RED/WHITE
Cable
Sensor
Figure 6-27 Sensor and Cable Splice