Slab Sensor (S7)
(See fig. h)
The Slab Sensor has a PVC plastic sleeve which is designed
for use in soils or concrete. It is supplied with 20 ft (6 m) of 2
conductor cable.
Step One – Mounting
(See fig. i)
NOTE:
Proper placement of this sensor is
critical for correct operation of the control.
This sensor is designed to be embedded in the slab material.
It is highly recommended the sensor be installed in a plastic
or metal conduit embedded in the slab. If there is ever a
sensor failure, this allows the sensor to be removed and
replaced. The sensor should be placed 1” (25 mm) below the
slab surface and half way between the pipes. Access to the
conduit after leaving the slab should be available for replacing
the sensor in the future if required.
(See fig. j)
Step Two – Wiring and testing
CAUTION:
Do not run sensor wires parallel to
telephone or power cables. If the sensor wires
are located in an area with strong sources of
electromagnetic interference, shielded cable
or twisted pair should be used or the wires can
be run in a grounded metal conduit. The ground
wire should be connected to the common sensor
terminal on the control and not to earth ground.
The Slab Sensor is supplied with 20' (6 m) of cable. If a longer
length is required, 18 AWG wire can be spliced onto the two
wires from the sensor. The splices should be properly
soldered and protected in an accessible, waterproof junction
box. Follow the sensor testing instructions given in this
brochure and then connect the wires to the control.
22
INST
ALLA
TION
INSTALLATION - Step 5 - Mounting the Sensors
h
i
Sensor half
way between
the pipes/cables
1”
(25 mm)
j
Conduit w/sensor
Sensor wire
Access panel
Summary of Contents for SYSTEMpro 311
Page 1: ...SYSTEMpro 311 Installation Manual...
Page 90: ...88 APPENDIX II APPENDIX II SYSTEMpro 311 Menu Tree...
Page 91: ...89 APPENDIX II APPENDIX II SYSTEMpro 311 Menu Tree...
Page 92: ...90 APPENDIX III APPENDIX III Application Drawings...
Page 93: ...91 APPENDIX III APPENDIX III Application Drawings...
Page 94: ...92 APPENDIX III APPENDIX III Application Drawings...
Page 95: ...93 APPENDIX III APPENDIX III Application Drawings...
Page 96: ...94 APPENDIX III APPENDIX III Application Drawings...
Page 97: ...95 APPENDIX III APPENDIX III Application Drawings...
Page 98: ...96 APPENDIX III APPENDIX III Application Drawings...
Page 99: ...97 APPENDIX III APPENDIX III Application Drawings...
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