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Installation - Electrical
Zone Sensor Installation
WARNING
Hazardous Voltage w/Capacitors!
Failure to disconnect power and discharge capacitors
before servicing could result in death or serious
injury.
Disconnect all electric power, including remote
disconnects and discharge all motor start/run
capacitors before servicing. Follow proper lockout/
tagout procedures to ensure the power cannot be
inadvertently energized. For variable frequency drives
or other energy storing components provided by
Trane or others, refer to the appropriate
manufacturer's literature for allowable waiting periods
for discharge of capacitors. Verify with a CAT III or IV
voltmeter rated per NFPA 70E that all capacitors have
discharged.
NOTICE
Use Copper Conductors Only!
Failure to use copper conductors could result in
equipment damage as the equipment was not
designed or qualified to accept other types of
conductors.
Note: For additional information regarding the safe
discharge of capacitors, see PROD-SVB06*-EN
All sensor options ship in the main control panel and are
field installed. Programmable option installation
procedures.
Mounting Location
Mount the sensor on the wall in an area with good air
circulation at an average temperature. Avoid mounting
space temperature sensor is areas subject to the following
conditions:
•
Drafts or "dead" spots behind doors or in corners
•
Hot or cold air from ducts
•
Radiant heat from the sun or appliances
•
Concealed pipes and chimneys
•
Unheated or non-cooled surfaces behind the sensor,
such as outside walls
•
Airflows from adjacent zones or other units
To mount the sensors, remove the dust cover and mount
the base on a flat surface or 2" x 4" junction box. Sensors
ship with mounting screws.
Mounting the Subbase
Remove the zone sensor cover from subbase, and mount
subbase on the wall or on a 2" x 4" junction box. Route
wires through the wire access hole in the subbase. See
Figure 26, p.
43. Seal the hole in the wall behind the
subbase.
42
Notes:
•
Guidelines for wire sizes and lengths are shown
in
Table 24, p.
low voltage wires must not exceed 2.5 ohms
per conductor. Any resistance greater than 2.5
ohms may cause the control to malfunction due
to excessive voltage drop.
•
Do not run low-voltage control wiring in same
conduit with high-voltage power wiring.
Wiring
1. Run wires between the unit control panel and the zone
sensor subbase. To determine the number of wires
required, refer to the unit wiring diagrams.
2. Connect the wiring to the appropriate terminals at the
unit control panel and at the zone sensor subbase. In
general, zone sensor connections to the unit use the
convention of connecting zone sensor terminals to like
numbered unit terminals (1 to 1, 2 to 2, etc.).The
connection detail is shown on the unit wiring diagrams,
which are located in the unit control panel.
3. Replace the zone sensor cover back on the subbase
and snap securely into place.
Standard Remote Sensor (BAYSENS077)
When using the remote sensor, BAYSENS077, mount it in
the space that is to be controlled. Wire according to the
interconnecting wiring diagrams on the unit.
Table 24. Zone sensor maximum lengths and wire
size
Distance from Unit to
Controller
0-150 feet
151-240 feet
241-385 feet
386-610 feet
611-970 feet
42. The total resistance of these
Recommended Wiring Size
22 gauge
20 gauge
18 gauge
16 gauge
14 gauge
SCXF-SVX01T-EN
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