Honeywell SmartLine, User Manual

Page: 87 / 130

7. Maintenance/Repair
7.7. Replacing antenna
Revision 2 SmartLine Wireles User's Manual 73
Antenna replacement procedure
Step Action
1
Honeywell recommends that the transmitter be removed from service and moved to a clean
area before servicing.
2
Loosen the M3 locking set screw on the display end-cap. See item 1 in Figure 7-4 . Unscrew
and remove the front end cap.
3
Loosen the two screws on the sensor module. See items 2 in Figure 7-4
4
Remove the sensor module from the transmitter body and disconnect the antenna connector
from CN2 connector on the sensor module. See item 3 in
Figure 7-4
5
Loosen the locking set screw at the antenna base. Unscrew the antenna from the transmitter.
Remove the antenna and its connector from the transmitter. See
Figure 7-4
6
Feed the new antenna’s connector through the antenna hole to the front of the transmitter. Do
not connect to sensor module yet. Lubricate O-ring with a Silicone Grease such as Dow
Corning #55 Screw new antenna into transmitter body until finger-tight, then back off 180
degrees to permit adjustment later.
7
Attach antenna connector to CN2 connector on sensor module. See item 3 in Figure 7-4 .
8
Insert sensor module. Orient in the proper viewing orientation before tightening two sensor
compartment screws. See items 2 in
Figure 7-4 . Torque screws to 0,4
– 0,6 Nm (3.5 – 5.3 lb-
in).
9
Replace the front end cap. Honeywell recommends lubricating the front end cap O-ring with a
Silicone Grease such as Dow Corning #55 or equivalent before replacing the end cap.
10
Adjust antenna for best reception.
Don’t rotate antenna more than 180 degrees either direction
or you could twist and break the antenna wiring inside. Tighten the antenna locking set screw.