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EN2R-9005 0406R3-NE 8
L4189 - L6189 SINGLE AQUASTAT - PANEL MOUNTING (IMMERSION)
APPLICATIONS AND ORDERING INFORMATION
Application
L4189 and L6189 are sensitive, immersion-type water
temperature thermostats for controlling and limiting boiler
water temperature in hydronic heating systems.
These thermostats are designed for panel mounting and are
supplied with a remote bulb and a liquid-filled sensing element
which fits into an immersion well (order separately) for
mounting into a boiler, tank or other vessel.
Ordering information
1 = High limit stop
2 = Without knob and index
3 = With mounting bracket
4 = With conduit box
5 = With cable connector
6 = Low limit stop
O.S. number Application Temperature
range
Switch
differential (K)
Switch type Setting means Capillary
length (mm)
Remarks
(see notes)
L4189A 2006 Controller 25 ... 95°C 4 SPST External knob 1000 2
L4189A 2014 Controller 25 ... 95°C 4 SPST External knob 1500 -
L4189A 2089 Controller 25 ... 95°C 4 SPST External knob 1000 1 - 4 - 5
L4189A 2097 Controller 25 ... 95°C 4 SPST External knob 1000 5
L4189A 2105 Controller 25 ... 95°C 4 SPST External knob 350 1 - 6
L4189B 2012 Controller 100 ... 230°F 4 SPST Internal screw 1000 3
L6189A 2001 Controller 25 ... 95°C 8 SPDT External knob 1500 2
L6189A 2019 Controller 25 ... 95°C 4 SPDT External knob 1500 -
L6189A 2043 Controller 40 ... 110°C
4 ... 10
(adjustable)
SPDT External knob 1500 -
L6189A 2068 Controller 25 ... 95°C 4 SPDT External knob 1000 2
L6189A 2092 Controller 110 ... 230°F
7 ... 18°F
(adjustable)
SPDT External knob 1500 1
L6189A 2118 Controller 110 ... 230°F15°F SPDT External knob 1500 1
L6189A 2134 Controller 110 ... 230°F
7 ... 18°F
(adjustable)
SPDT External knob 1500 1
L6189A 2142 Controller 110 ... 230°F15°F SPDT External knob 2000 1
L6189A 2159 Controller 110 ... 230°F
7 ... 18°F
(adjustable)
SPDT External knob 2000 1
L6189B 2009 Controller 25 ... 95°C 4 SPDT Internal screw 1000 -
L6189B 2025 Controller 25 ... 95°C 4 SPDT Internal screw 1000 2, Tradeline
L6189B 2041 Controller 40 ... 110°C 8 SPDT Internal screw 1500 -
L6189C 2007 Limiter 40 ... 110°C Manual reset SPDT Internal screw 1500 -
L6189C 2023 Limiter 110 ... 230°F Manual reset SPDT External knob 1500 -
L6189C 2031 Limiter 110 ... 230°F Manual reset SPDT External knob 2000 -