6-22
T-292
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 6-22.
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 resis-
tance.
m.Position sensor in unit as shown in Figure 6-23 and
re--check sensor resistance.
n. Reinstall sensor, refer to paragraph 6.21.3.
NOTE
The P5 Pre-Trip test must be run to inactivate
probe alarms (refer to paragraph 4.8).
6.21.3 Sensor Re--Installation
a. Sensors STS and SRS
To properly position a supply sensor, the sensor must be
fully inserted into the probe holder. This positioning will
give the sensor the optimum amount of exposure to the
supply air stream, and will allow the Controller to
operate correctly. Insufficient probe insertion into the
probe holder will result in poor temperature control due
to the lack of air flow over the sensor.
It is also necessary to ensure that the probe tip does not
contact the evaporator back panel. The design
minimum clearance of 6 mm (1/4 inch) should be
maintained (see Figure 6-23).
Cap and Grommet
Assembly
Probe
Holder
Supply Sensor
Sensor
Wires
Supply
Air
Stream
Evaporator
Back Panel
6 mm
(1/4 inch)
Figure 6-23 Supply Sensor Positioning
b. Sensors RRS and RTS
Reinstall the return sensor as shown in Figure 6-24. For
proper placement of the return sensor, be sure to
position the enlarged positioning section of the sensor
against the the side of the mounting clamp.
Evaporator Grille
Return Sensor
Mounting
Clamp
Enlarged Positioning
(Plastic) Section
Figure 6-24 Return Sensor Positioning
c. Sensor DTS
The DTS sensor must have insulating material placed
completely over the sensor to insure the coil metal
temperature is sensed.
6.22 ELECTRONIC PARTLOW TEMPERATURE
RECORDER
The microprocessor based temperature recorder is
designed to interface with the DataCORDER to log
temperature with time. The electronic recorder will
automatically record the return air, supply air, or both,
based on the setting of temperature controller
configuration code CnF37, refer to Table 3-4. The
recorder reads and records data from the Controller in
present time, under normal operating conditions.
If using the Electronic Partlow Recorder CTD P/N
12-00464-xx
Where xx= an odd number (example: 12--00464--03 )
The recorder will STOP when the power is OFF, and the
pen tip will remain at the last recorded temperature on
the chart. When power is applied, and the power off
period is less than thirty days; the pen tip will move to
25
°
C (77
°
F), the chart will advance to present time, and
the pen tip will move to the currently recorded
temperature.
If the power has been OFF for more than thirty days, the
recorder will NOT re--synchronize (the chart will not
advance to present time), the pen tip will move to the
currently recorded temperature, and the recorder will
resume normal temperature recording.
If using the Electronic Partlow Recorder CTD P/N
12-00464-xx
Where xx= an even number (example: 12--00464--02)
The recorder will STOP when the power is OFF, and the
pen tip will remain at the last recorded temperature on
the chart. When power is applied, and the power off
period is less than thirty days; the recorder will retrieve
the logged data from the DataCORDER for the power
off period and record it onto the chart, thereafter, the
recorder will resume normal temperature recording.
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