Carrier 69NT40-561-201, Руководство по эксплуатации и обслуживанию, Страница: 101 / 117

6 − 20 T-364
6.22.2 Sensor Replacement
WARNING
Always turn OFF the unit circuit breaker
(CB-1) and disconnect main power supply
before removing electrical parts.
a. Turn unit power OFF and disconnect power supply.
NOTE
Include white date code label when cutting out
and removing defective sensors. The label
could be required for warranty returns.
b. Cut cable. Slide the cap and grommet off a bulb type
sensor and save for reuse. Do not cut the grommet.
c. Cut one wire of existing cable 40 mm (1-1/2 inches)
shorter than the other wire.
d. Cut replacement sensor wires (opposite colors) back
40 mm (1-1/2 inches). (See Figure 6 − 14.)
e. Strip back insulation on all wiring 6.3 mm (1/4 inch).
1
2
Mounting Stud Type
3
Bulb Type
1 2
3
1. Sensor
2. 40 mm (1 1/2 in), 2 or 3 wires as required
3. 6.3 mm (1/4 in).
Figure 6 − 14 Sensor Types
f. Slide a large piece of heat shrink tubing over the
cable, and place the two small pieces of heat shrink
tubing, one over each wire, before adding crimp fit-
tings as shown in Figure 6 − 15.
2
1
2
1
3
4
ÉÉÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉÉÉ
1. Cable
2. Sensor (Typical)
3. Large Heat Shrink
Tubing (1)
4. Heat Shrink
Tubing, 2 or 3
as required
Figure 6 − 15 Sensor and Cable Splice
g. If required, slide the cap and grommet assembly onto
the replacement sensor.
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 each splice so that ends
of tubing cover both ends of crimp as shown in
Figure 6 − 15.
k. Heat tubing to shrink over splice. Make sure all seams
are sealed tightly against the wiring to prevent mois-
ture seepage.
CAUTION
Do not allow moisture to enter wire splice
area as this may affect sensor resistance.
l. Slide large heat shrink tubing over both splices and
shrink.
m.Position sensor in unit as shown:
Figure 6 − 14 − Return Sensor Positioning
Figure 6 − 16 − Supply Sensor Positioning
Figure 6 − 18 − ETS Sensor Positioning
in Figure 6 − 15 and re-check sensor resistance.
n. Reinstall sensor, refer to:
6.22.3 − For STS and SRS Re-Installation
6.22.4 − For RRS and RTS Re-Installation
6.22.5 − For DTS Re-Installation
6.22.6 − For ETS1 and ETS2 Re-Installation
NOTE
The P5 Pre-Trip test must be run to deactivate
probe alarms (refer to paragraph 4.7).