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L482A LOW LIMIT CONTROLLER
Sensing Element
IMPORTANT
• The maximum allowable sensing element tempera-
ture is 250°F (121°C).
• Uncoil only the amount of element required for the
application.
• Bend element carefully and only as much as neces-
sary. Bends require a minimum radius of one inch
(25 mm).
• Bend only some distance from the controller.
• Pulling on the element damages it.
• For elements subject to vibration, provide protection
from any surface which the element contacts.
• Mount element horizontally as shown in Fig. 2 and 3.
1. Locate the sensing element where it can sense the
temperature of the air to be controlled.
NOTE: Locate the element away from hot or cold air
inlets.
2. Punch or drill a 1/4 in. hole in the duct and install
CCT1802 Grommet (Fig. 2) to protect the capillary.
3. Carefully insert the element through the grommet into
the duct. Use as much element as possible to provide
maximum protection.
4. Mount the element inside the duct or fasten to the coil if
freezing can occur.
a. Duct mounting: Use CCT2600 Clip (Fig. 2).
b. Coil fastening: Use perforated metal straps (Fig. 3).
GROMMET
ELEMENT
Fig. 2. Element mounted to duct with CCT2600 Clips.
PERFORATED METAL STRAPS
ELEMENT
Fig. 3. Element mounted in duct with
perforated metal straps.
95-7432–1
996-496 Rev. A
USE NO. 10
SHEET METAL
SCREWS
CLIP
DETAIL
BEND HERE IF
NECESSARY
C789
C790
WIRE FASTENINGS
2
OPERATION
On a temperature drop to setpoint, LINE 1 to M1 contacts
close and LINE 2 to M2 contacts open. Reset to the normal
state is manual.
WIRING
WARNING
Electrical Shock Hazard.
Can cause severe injury, death or equipment
damage.
Disconnect power supply before beginning installation
to prevent electrical shock or equipment damage.
IMPORTANT
– All wiring must agree with applicable codes,
ordinances and regulations.
– When switching both ac line voltage and an
automation input (Fig. 4), the input wires must
run no more than three feet in the same conduit.
See Fig. 6.
For typical L482A wiring, see Fig. 4 and 5.
NOTES:
–
Screw terminals are provided for wiring
connections.
–
Maximum wire size is 12 AWG.
–
Use 8-32 x 1/4-inch screws for replacement if
necessary. Longer screws can interfere with the
switch mechanism and damage the switch.
L1
(HOT)
FAN RELAY
L2
TO STATUS
OR ALARM
INPUT OF
AUTOMATION
SYSTEM
Fig. 4. Typical wiring diagram with automation input.
LINE 2
LINE 1
M1
M2
C791
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