Honeywell L480B, L480G Product Information Sheet
L480B,G Temperature Controllers
PRODUCT DATA
FEATURES
• Typical applications include freezer cabinets, display
cases, beverage coolers, milk cooling tanks and air
conditioners.
• The L480B can act as a frost alarm operator in
storehouses, orchards, or other locations where frost
could damage crops or equipment.
• The L480B automatically recycles. It has a single-pole,
double-throw (spdt) switch that can be wired to make
an alarm circuit at the setpoint.
• The L480G is a manual reset model. Its single-pole,
single-throw (spst) switch locks out the control circuit
on temperature fall to the setpoint.
• A dual temperature scaleplate is provided for both
Fahrenheit and Celsius readings.
• The temperature range is 20°F to 60°F (-5°C to +15°C).
• The L480B,G has a 20 foot (6 meter) sensing element
APPLICATION
The L480B,G Temperature Controllers operate electric
dampers, valves, and compressor or fan motors to provide
temperature or limit control of air conditioning systems and
refrigeration units.
with no sensing bulb.
• The enclosed snap switch is dustproof and
moistureproof for trouble-free operation.
• The controller can be mounted horizontally or
vertically on a wall or panel, or directly on the
compressor case.
Contents
Application ........................................................................ 1
Features ........................................................................... 1
Specifications ................................................................... 2
Ordering Information ........................................................ 2
Installation ........................................................................ 2
Operation and Checkout ................................................... 4
60-2203-05
L480B,G TEMPERATURE CONTROLLERS
CAUTION
SPECIFICATIONS
Models:
L480B Temperature Controller with spdt snap switch, auto-
matic recycling.
L480G Temperature Controller with spst snap switch, manual
reset.
Switching Action:
L480B: Breaks control circuit and makes another circuit
(makes R-B and breaks R-W) on temperature fall.
Automatically recycles.
L480G: Breaks control circuit on temperature fall. Manual
reset.
Electrical Ratings (Amperes):
See Table 1.
DC Rating: 0.2A at 120 Vdc, 0.1A at 240 Vdc.
Pilot Duty Rating: 125 VA
Table 1. Full Load and Locked Rotor Ampere ratings.
L480B,G 120 Vac 240 Vac
Full Load 10.2 6.5
Locked Rotor 61.2 39.0
Ambient Temperature Range:
-20°F to +125°F (-11°C to +52°C).
Maximum Sensor Temperature:
225°F (107°C).
Operating Temperature Range:
20°F to 60°F (-5°C to +15°C); Dual Fahrenheit/Celsius
scaleplate.
Temperature Sensing Means:
20 ft (6m) element, no sensing bulb.
Temperature Setting Means:
A slotted screw at the top of the controller. The setpoint is
indicated through a scale opening in the cover.
Differential:
Nonadjustable, additive, and fixed, 10°F (6°C) maximum.
Finish:
Gray.
Mounting Means:
Mounting lugs located on back of case.
Dimensions:
See Fig. 1.
Approvals:
Underwriters Laboratories Inc., Listed: File Number
SA481, Vol. No. 2, dated 02-09-66; Guide No. SDFY2.
Canadian Standards Association Certified: Listing G, File
No. LR1620; Guide No. 400-E-0.
Accessories:
314439 Clips for mounting element inside duct. Specify
quantity needed when ordering.
7640HX Assembly Kit for installing tubing when access
into duct is not possible.
For Immersion well assemblies, see Honeywell
TRADELINE® Catalog.
113665 Grommet.
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 the ratings given in the instructions and on the
product to make sure the product is suitable for your
application.
3. Installer must be a trained, experienced service technician.
4. After installation, check out the product as provided in
these instructions.
Disconnect the power supply before installation to
prevent electrical shock or possible equipment
damage.
ORDERING INFORMATION
When purchasing replacement and modernization products from your TRADELINE® wholesaler or distributor, refer to the
TRADELINE® Catalog or price sheets for complete ordering number. If you have additional questions, need further information,
or would like to comment on our products or services, please write or phone:
1. Your local Honeywell Environmental and Combustion Controls Sales Office (check white pages of your phone directory).
2. Honeywell Customer Care
1885 Douglas Drive North
Minneapolis, Minnesota 55422-4386
3. http://customer.honeywell.com or http://customer.honeywell.ca
International Sales and Service Offices in all principal cities of the world. Manufacturing in Belgium, Canada, China, Czech
Republic, Germany, Hungary, Italy, Mexico, Netherlands, United Kingdom, and United States.
60-2203—05 2
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