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50 SCXG-SVX01B-EN
pre-startup
requirements
Programmable Zone Sensor
Installation
Mounting Location
Mount the sensor on the wall in an area
with good air circulation at an average
temperature. Choose a location that is
easily accessible, and on a wall where the
subbase can be mounted about 5 feet
(1.5 meters) above the floor.
Avoid mounting space temperature
sensor in 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
Installation Procedure
1. Remove the zone sensor module from
the subbase. Carefully hold the zone
sensor module with one hand and
firmly grasp the subbase with the other.
See Figure I-PR-20. To remove the zone
sensor module from the subbase,
gently pull away and upward.
Note: The zone sensor module is an
electronic sensitive device. Do not touch
printed circuit board, electronic compo-
nents, or connector pins. Handle plastic
housing only to prevent damage to
electronic components.
2. After disassembly, protect the internal
surfaces from contact with objects or
substances that could cause damage.
3. Remove the terminal block from
subbase and set aside for wiring.
Discard the tape.
4. Mount the zone sensor module using
the mounting hardware included in the
shipping package. The mounting
hardware is contained in single plastic
bag and includes:
• Plastic wall anchors (3 x)
• Mounting screws (3 x)
The zone sensor module can mount
directly to a wall or to a junction box
mounted to a wall. To mount to a
junction box, you must have the
mounting plate and adapter kit,
BAYMTPL003. Installation instructions
are enclosed with the mounting plate.
5. To mount the zone sensor module
directly to a wall:
Figure I-PR-21. Securing the subbase
Figure I-PR-20. Removing the zone sensor
module from the subbase
Installation
Figure I-PR-18. BAYSENS019 dimensions
Figure I-PR-19. BAYSENS020 dimensions
(140 mm)
(95 mm)
(140mm)
(95mm)
a. Hold the subbase in position and mark
the three mounting hole locations on
the wall.
b. Drill three
3
/
16
” (4.8 mm)
holes. Gently
tap the plastic wall anchors into the
holes until the anchor tops are flush
with the wall.
6. Pull the zone sensor module wires
through the subbase as shown in Figure
I-PR-21.
7. Loosely secure subbase to the wall
with the mounting screws. Do not
tighten the subbase screws yet.
8. Level the subbase by sight, then firmly
tighten the three subbase mounting
screws.
Note: Do not overtighten the subbase
screws. Overtightening may cause the
screws to crack the subbase.
9. Before wiring the subbase, identify the
wires from the unit’s low voltage
terminal strip. Each screw terminal is
labeled.
10. Remove TB from subbase and
discard the tape.
11. Strip the wires
1
/
4
” and
connect the
wires from the unit’s low voltage
terminal strip to the zone sensor
module subbase. Reference connection
details on the unit wiring diagrams,
located on the unit.
12. Firmly tighten each screw terminal.
13. Fit the wires as close to the subbase
as possible.