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Honeywell L482A Installation Instructions

Low limit controller
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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
convenient location (including the duct itself). Orient the case
with the bellows positioned on the bottom.
® U.S. Registered Trademark
Copyright © 2004 Honeywell International Inc.
All Rights Reserved
Low Limit Controller
INSTALLATION INSTRUCTIONS
SETPOINT
SCALE
20 FT BY 1/8 INCH
SENSING ELEMENT
3/8 X 3/16
(10 X 5)
DIAMETER
ELONGATED
1-7/8
MOUNTING
(48)
HOLE
1-1/8 (29)
1 (25)
MOUNTING
HOLES (2)
10-32 UNF-2B
THREAD
5/16 (8)
Fig. 1. L482A Low Limit Controller dimensions in in. (mm).
L482A
4 (101)
PUSH
TO
SETPOINT
RESET
ADJUSTMENT
SCREW
4-11/16
(119)
7/8 (22) HOLE
FOR 1/2 CONDUIT
WITH 1-3/32 (28)
KNOCKOUT RING
FOR 3/4 CONDUIT
2-3/32
(53)
3/16 (5)
DIAMETER
MOUNTING
HOLE
5/16
(8)
3-1/4 (83)
C606A
95-7432-1
996-496 Rev. A

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  Summary of Contents for Honeywell L482A

  • Page 1 L482A Low Limit Controller INSTALLATION INSTRUCTIONS BEFORE INSTALLATION 4 (101) PUSH SETPOINT No special tools are required to install the L482A Low Limit RESET ADJUSTMENT Controller. Refer to the job drawings for specific wiring and SCREW installation information. INSTALLATION 4-11/16 (119) When Installing this Product...
  • Page 2 See Fig. 6. the duct. Use as much element as possible to provide maximum protection. For typical L482A wiring, see Fig. 4 and 5. 4. Mount the element inside the duct or fasten to the coil if freezing can occur.
  • Page 3 1000 feet (305m) above sea level. CHECKOUT LINE 2 LINE 1 Because of the L482A limited setpoint range, operational checkout can be difficult. Use one of the following methods to verify proper controller operation: 1. If the ambient temperature is below 50°F (10°C): a. Turn the setpoint adjustment through the ambient...
  • Page 4 Automation and Control Solutions Honeywell International Inc. Honeywell Limited-Honeywell Limitée 1985 Douglas Drive North 35 Dynamic Drive Golden Valley, MN 55422 Scarborough, Ontario M1V 4Z9 996-496 Rev. A Printed in U.S.A. on recycled 95-7432–1 B.B. Rev. 4-04 www.honeywell.com paper containing at least 10%...