Carrier 69NT40-541-001, Операция и обслуживание

Страница: 121 / 156

7–33 T-316
Figure 7.25 Sensor Types
d. Prepare the cables by cutting wires to the opposite of the sensor. (See Figure 7.26 .)
When installing a single wire color two wire sensor, cut one wire of existing two wire cable 40 mm (1-1/2
inch) shorter than the other wire.
When replacing two single sensors with a combination (three 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 three wire sensor, cut the black wire to the middle length and the red wire to
the shorter length.
e. Strip back insulation on all wiring 6.3 mm (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 7.26 .
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 grommet 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 crimping 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 7.26 .
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 the sensor resistance.
m. Reinstall sensor, refer to Section 7.21.3 .
NOTE
The P5 Pre-Trip test must be run to inactivate probe alarms (refer to Section 5.8 ).
Sensor
40mm (1--1/2 inch)
6.3mm (1/4--inch)
Mounting Stud Type
Sensor
40 mm (1-1/2 inches)
6.3--mm (1/4--inch)
Bulb Type