Hansen HLL Series Operating instructions

Specifications, Applications,
Service Instructions & Parts
REFRIGERANT
FLOAT SWITCHES
Bulletin HLLe
SEPT 2013
for Ammonia, R22, R134a, CO2
and Other Approved Liquids
HLL Refrigerant Float Switch
INTRODUCTION
These Hansen refrigerant liquid level float switches
(HLL Series) are used to electrically indicate or control
a liquid level by opening or closing a SPDT switch. Their
simple, reliable design provides long life performance
for almost any application.
APPLICATIONS
These refrigerant liquid level float switches are typically
installed on a vessel’s liquid level column. They can
control liquid level by controlling a liquid fill solenoid
valve. Often, they are used to provide high level cut-
out or alarm. In addition, they can be used to turn off
a recirculating liquid pump if a low level occurs. Other
applications include control of liquid level via a liquid
exit solenoid valve, level indication via a pilot light,
and transfer drum operation.
MATeRIAL SPeCIFICATIONS
Safe Working Pressure: 400 psig (27 bar),
600 psig (40 bar) for CO2
Operating Temperature: -50ºF to +150ºF
(-45°C to +65°C)
Connections: ¾" FPT / 1" Butt Weld combination
Specific Gravity: 0.57 to 1.70
Electrical Switch: 120V, 240V, 10 amp SPDT
Connection: ½" NPSM for conduit, optional
DIN plug (3 wire plus ground)
ADVANTAGeS
Innovative features make these float switches the
superior selection. To overcome the most common
reason for existing float switch failure, switch burnout,
a heavy duty 10 amp snap action Honeywell SPDT
Micro Switch®is used. This switch is sealed in a
clear housing to allow visual confirmation of switch
action but protection from tampering. In addition, the
switch is surrounded by an inert gas which provides
an environment which inhibits corrosion. For ease of
installation, switch assembly position rotates 360°. If
the switch assembly should ever need to be replaced,
simply loosen the retaining screw and lift the lfoat
switch assembly off the top of the tank assembly.
Optional switch housing heater prevents moisture
penetration in humid environments.
Tank assembly is rugged, steel bodied with unique
combination ¾" FPT / 1" Butt Weld connections. Inside,
a high pressure tested float ball moves up and down via
a large diameter stem, overcoming potential bending
or breakage. Its movement is accurately guided by the
attractor and an alignment guide. Therefore, the float
ball assembly is not subject to the common, adverse
effects of normal oil and sludge build-up on the tank
interior walls. A deflector plate across the inlet of
the tank assembly protects the float ball against
sudden surges and provides smoother operation. In
addition, lower and upper cushioning springs provide
improved protection for the float ball. A standard 2"
(50 mm) differential prevents most short cycling due to
momentary changes in liquid level; other differentials
down to 0.5" (13 mm) are available. Because the tank
assembly is welded, it eliminates gasket leak potential
as well as tampering.

2
HLLe
SEPT 2013
key FeATUReS
CLEAR HOUSING
HERMETICALLY
SEALED
1/2" NPSM
CONDUIT CONNECTION
OPTIONAL HEATER
SIDE VIEW
RETAINING SCREW
UPPER SPRING
ATTRACTOR
3/4" FPT/1" BUTTWELD
CONNECTION
LOWER SPRING
3/4" FPT/1" BUTTWELD
CONNECTION
FLOAT BALL
MAGNET
LEVER ARM
SWITCH ASSEMBLY
POSITION
METAL COVER
OPTIONAL
3/4" FPT/1" BUTTWELD
CONNECTION
HLLS, HLLSC ONLY
HIGH PRESSURE
TESTED
WELDED TANK AND
NECK ASSEMBLY
ELIMINATES
GASKET LEAK
POTENTIAL
GROOVE
ROTATES 360°
SPDT SWITCH
HEAVY DUTY 10 AMP (OPTIONAL DIN PLUG)
KEY FEATURES

3HLLe
SEPT 2013
INSTALLATION DIMeNSIONS
INCHES (MM)
LOOSEN SCREW
TO ROTATE
SWITCH
ASSEMBLY TO
ANY DIRECTION
1/2" NPSM
CONDUIT
CONNECTION
ALLOW 8.75 (222)
ABOVE UNIT FOR
REMOVAL OF SWITCH
ASSEMBLY OR
METAL COVER
3.16
(80)
21.81
(554) 5.69
(145)
2.78
(71)
4.50 DIA
(114)
1.88
(48 )
8.12
(206)
5.75
(146)
HALOCARBON
HIGH
HALOCARBON
LOW
2.00
(50)
2.00
(50)
1.25 (32)
(50)
2.00
NH
HIGH
3
NH 3
LOW
INSTALLATION DIMENSIONS
INCHES (MM)

4
HLLe
SEPT 2013
Hansen Technologies Corporation
400 Quadrangle Drive, Suite F
Bolingbrook, Illinois 60440 USA
Tel: [phone] Fax: [phone] Toll: 866.4HANSEN
Email: [email protected] Web: www.hantech.com
USA ∙ Asia ∙ Europe ∙ India ∙ LatinAmerica ∙ MiddleEast
© 2006 Hansen Technologies Corporation
INSTALLATION INSTRUCTIONS
Carefully remove plastic cap and wooden retaining
plug from the side connection of the tank and discard.
Install tank per proper refrigeration practice being
sure tank is vertical in all planes.
Remove the shipping tube from the float switch
assembly and discard. Install the float switch assembly
on the float switch tank being certain the float switch
assembly bottoms on the neck assembly. Warning:
Tighten the retaining screw such that the screw tip is
in the groove in the neck assembly. If the float switch
assembly is not properly positioned and retained, the
switch may not function.
eLeCTRICAL wIRING
CAUTION
Hansen refrigerant float switches are only for
refrigeration systems. These instructions and related
safety precautions must be read completely and
understood before selecting, using or servicing these
liquid level monitors. Only knowledgeable, trained
refrigeration mechanics should install or service
these refrigerant float switches. Stated temperature
and pressure limits should not be exceeded. See also
the Safety Precautions sheet supplied with product.
Escaping refrigerant might cause personal injury,
particularly to the eyes and lungs.
wARRANTy
Hansen electrical parts are guaranteed against
defective materials and workmanship for 90 days F.O.B.
our plant. All other components are guaranteed for
one year F.O.B. our plant. No consequential damage
or field labor is included.
ORDeRING INFORMATION
CAT NO DeSCRIPTION
HLL Standard Float Switch with Side & Bottom
Connections
HLLS Universal Float Switch with 2 Side &
1 Bottom Connections
HLLC HLL with Protective Metal Cover
HLLSC HLLS with Protective Metal Cover
HLLSW Switch Assembly Only, Hermetic (fits all
above HLL models)
EEuropean DIN Plug Construction (add
E suffix to any of the above HLL models)
COV Metal Cover Only (fits HLL)
HTR1* 10 Watt 115V Heater (fits HLL)
HTR2* 10 Watt 230V Heater (fits HLL)
Specify Catalog Number. To order float switch with
heater, add H suffix; Example: HLLH and specify
voltage. Heater can also be retrofitted.
Black Wire (N.O.)
Red Wire (N.C.)
Gray Wire (Common)
Common Lead
Normally Open Contacts
Normally Closed Contacts
Contacts Close With The
Rise Of The Liquid Level
Rise Of The Liquid Level
Contacts Open With The
HANSEN TECHNOLOGIES CORPORATION
3475 OLD MAYSVILLE ROAD
COMMERCE, GA 30529 USA
TELEPHONE: [phone]
TOLL-FREE: [phone]
FAX: [phone]
WWW.HANTECH.COM
wIRe TAG
HERMETICALLY SEALED
WIRING DIAGRAM - HLL WITH WATER
BLACK (N.O.)
SCHWARZ
NOIR
NEGRO
HIGH LEVELGRAY (COMMON)
GRAU
GRIS
LOW LEVEL
RED (N.C.)
ROT
ROUGE
ROJO
OPTIONAL FLOAT SWITCH HEATER
ELECTRICAL JUNCTION BOX
LINE
TO LOAD
TO LOAD
{
BLACK (N.O.)
HIGH LEVEL GRAY (COMMON)
LOW LEVEL
RED (N.C.)
2
1
3
BULLETIN USE ONLY
THIS DWG IS FOR