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L4188A,B; L4189A,B; L6188A-C; L6189A-C AQUASTAT® CONTROLLERS
68-0061—1 2
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 Automation and Control Products Sales Office (check white pages of your phone directory).
2. Honeywell Customer Care
1885 Douglas Drive North
Minneapolis, Minnesota 55422-4386
In Canada—Honeywell Limited/Honeywell Limitée, 35 Dynamic Drive, Toronto, Ontario M1V 4Z9.
International Sales and Service Offices in all principal cities of the world. Manufacturing in Australia, Canada, Finland, France,
Germany, Japan, Mexico, Netherlands, Spain, Taiwan, United Kingdom, U.S.A.
SPECIFICATIONS
Electrical Ratings:
Switching: Diaphragm-operated, snap-acting switch.
L4188, L4189: Switch breaks on temperature rise to set
point, remakes when temperature drops below set point
and through differential.
L6188, L6189: Switch breaks C-1 and makes C-2 on
temperature rise to set point; switches back when
temperature drops below set point and through
differential.
Terminals: 1/4 in. male quick-connects standards. Options
(specify when ordering):
Combination screw and 1/4 in. quick connects.
Separate grounding terminal.
Temperature Setting Range: 80° to 200° F (27° to 93° C),
110° to 230° F (43° to 110° C), and 160° to 280° F (71° to
138° C) available. Specify when ordering.
Temperature setting minus differential must be no more
than 9° F (-13° C) below bottom of setting range.
Setting Scale: Marked every 20° F (-7° C), with subdivisions
every 10° F (-12° C), includes OFF setting.
Limit Stop: Limits dial rotation beyond desired high or low
limit temperature. Can be set at 5° F (2.5° C) intervals.
Optional, available on models with knob only. Specify when
ordering.
IMPORTANT
The specifications given in this publication do not include normal manufacturing tolerances. Therefore, this unit may not
match the listed specifications exactly. Also, this product is tested and calibrated under closely controlled conditions,
and some minor differences in performance can be expected if those conditions are changed.
MODELS: See Table 1.
Table 1. Aquastat
®
Controller Selection Guide
a
Specify when ordering.
24 Vac 120 Vac 240 Vac
Full Load 2.0 A 8.0 A 5.1 A
Locked Rotor 48.0 A 30.6 A
Model Application Switching Mounting Setting Differential
a
L4188A High or low limit Spst, breaks on
temp. rise
Direct Knob 7°, 14° or 22° F (-14°, -10° or -6° C),
fixed
a
L4188B Screwdriver slot
L4189A Remote bulb Knob
L4189B Screwdriver slot
L6188A Low limit and
circulator
Spdt, breaks C-1,
makes C-2 on
temp. rise.
Direct Knob 7°, 14° or 22° F (-14°, -10° or -6° C),
fixed
a
, 7° - 18° F (-16° - -8° C),
adjustable
a
L6188B Screwdriver slot
L6188C Manual reset
L6189A Remote bulb Knob 7°, 14° or 22° F (-14°, -10° or -6° C),
fixed
a
, 7° - 18° F (-16° - -8° C),
adjustable
a
L6189B Screwdriver slot
L6189C Manual reset