Instructions / Assembly

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L482A

Low Limit Controller

INSTALLATION INSTRUCTIONS

BEFORE INSTALLATION

No special tools are required to install the L482A Low Limit

Controller. Refer to the job drawings for specific wiring and

installation information.

INSTALLATION

When Installing this Product...

1. Read these instructions carefully. Failure to follow them

could damage the product or cause a hazardous

condition.

2. Check ratings given in instructions and on the product to

ensure the product is suitable for your application.

3. Installer must be a trained, experienced service

technician.

4. After installation is complete, check out product

operation as provided in these instructions.

Mounting

IMPORTANT

1. The controller operates from the lowest temperature

along the entire 20 feet of the sensing element.

2. Locate controller case and bellows where ambient

temperature is always warmer than the set point.

3. For settings above the scale range midpoint it can be

necessary to locate the controller case close to a

steam pipe or other warm surface and make sure the

element does not extend across a cold surface.

Controller

Surface mount the controller (Fig. 1) vertically on any

Fig. 1. L482A Low Limit Controller dimensions in in. (mm).

convenient location (including the duct itself). Orient the case

with the bellows positioned on the bottom.

SETPOINT

ADJUSTMENT

SCREW

4 (101)

2-3/32

(53)

7/8 (22) HOLE

FOR 1/2 CONDUIT

WITH 1-3/32 (28)

KNOCKOUT RING

FOR 3/4 CONDUIT

1-7/8

(48)

5/16

(8)

3/16 (5)

DIAMETER

MOUNTING

HOLE

3-1/4 (83)

5/16 (8)

1 (25)

1-1/8 (29)

3/8 X 3/16

(10 X 5)

DIAMETER

ELONGATED

MOUNTING

HOLE

C606A

SETPOINT

SCALE

4-11/16

(119)

MOUNTING

HOLES (2)

10-32 UNF-2B

THREAD

PUSH

RESET

20 FT BY 1/8 INCH

SENSING ELEMENT

® U.S. Registered Trademark

95-7432-1

996-496 Rev. A

Summary of content (4 pages)

PAGE 1
L482A Low Limit Controller INSTALLATION INSTRUCTIONS BEFORE INSTALLATION 4 (101) SETPOINT ADJUSTMENT SCREW No special tools are required to install the L482A Low Limit Controller. Refer to the job drawings for specific wiring and installation information. INSTALLATION PUSH TO RESET 4-11/16 (119) When Installing this Product... 1. 2. 3. 4. Read these instructions carefully. Failure to follow them could damage the product or cause a hazardous condition.
PAGE 2
L482A LOW LIMIT CONTROLLER Sensing Element OPERATION IMPORTANT • The maximum allowable sensing element temperature is 250°F (121°C). • Uncoil only the amount of element required for the application. • Bend element carefully and only as much as necessary. 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.
PAGE 3
L482A LOW LIMIT CONTROLLER Adjustment LINE 2 LINE 1 M2 M1 Turn the setpoint adjustment screw (Fig. 1) on the top of the controller case to the value called for on the job drawings. NOTES: 1. 2. L1 (HOT) L2 FAN RELAY LOCAL ALARM C792 3. Fig. 5. Hookup providing freeze protection by shutting down fan with line powered local alarm. The setpoint adjustment is limited to 35-55°F (2-13°C) by an internal physical stop. The setpoint is factory set at 35°F.
PAGE 4
Automation and Control Solutions Honeywell International Inc. 1985 Douglas Drive North Golden Valley, MN 55422 Honeywell Limited-Honeywell Limitée 35 Dynamic Drive Scarborough, Ontario M1V 4Z9 996-496 Rev. A 95-7432–1 B.B. Rev. 4-04 Printed in U.S.A. on recycled paper containing at least 10% post-consumer paper fibers. www.honeywell.