Honeywell Thermostat 1EN2R 9005 0406R3 NE User Manual

L41../L61.. SERIES  
THERMOSTAT (AQUASTAT)  
PRODUCTION HANDBOOK  
APPLICATION  
The L41../L61.. series aquastats are primarily designed for  
application on water filled heating systems and systems for hot  
water supply, mainly domestic use.  
Contents  
General  
page  
Description of device functions ......................................... 2  
Description ........................................................................ 3  
Overview/selection guide ................................................. 4  
Features ............................................................................ 5  
Aquastat series  
L4188 - L6188 .................................................................. 6  
L4189 - L6189 .................................................................. 8  
L6190 ............................................................................. 10  
L4191 - L6191 ................................................................ 12  
L6188A 2044 Tradeline .................................................. 14  
Performance .................................................................... 16  
Construction .................................................................... 17  
Various  
Accessories and spare parts ........................................... 18  
Quality assurance statement ........................................... 20  
Standards and approvals ................................................ 20  
Ordering information ........................................................ 21  
1
EN2R-9005 0406R3-NE  
 
DESCRIPTION  
The L41../L61.. series aquastats can be divided in the  
following main types:  
Controller  
The L41../L61.. series aquastats are sensitive water tempera-  
ture control, which are provided with a liquid filled sensing sys-  
tem.  
Controls the water temperature in accordance with the  
setting of an external knob (TÜV-type TR)  
The following main types are available:  
Recycling limit control  
Single, panel mount immersion  
Limits the water temperature below or above an adjusted  
level and resets automatically. This type has a greater  
differential and no external knob (TÜV-type TW).  
Aquastat with remote bulb to select the most favourable  
position on a boiler or vessel.  
Single, direct mounted immersion  
Aquastat with insulating cover to protect against accidential  
touching of live parts.  
Thermal cut-out with external reset button  
(manual reset)  
Limits the water temperature on a maximum adjusted level.  
This type does not reset automatically and it does not have  
an external knob.  
Dual, direct mounted immersion  
Dual Aquastat and consisting of two basic single units,  
which are mounted together and protected by one common  
cover and using one well for the two sensors.  
Thermal cut-out with internal reset button (tool reset)  
Limits the water temperature on a maximum adjusted level.  
This type does not reset automatically and it does not have  
an external knob.  
Single, surface mounted  
The sensor of this type is to be mounted directly on the  
surface of a boiler or pipe in a heating system. The  
Aquastat mechanism is directly attached to this sensor.  
The L41../L61.. series aquastats are primarily designed for  
application on water filled heating systems and systems for hot  
water supply, mainly domestic use.  
3
EN2R-9005 0406R3-NE  
 
OVERVIEW/SELECTION GUIDE  
Application  
Single Aquastat thermostats  
Controller or limiter thermostat  
Dual Aquastat thermostats  
Controller and limiter thermostat with standard  
sensing element  
Direct mount (immersion)  
L4188A, B, C  
25 ... 95°C  
40 ... 110°C  
70 ... 140°C  
L6188A, B, C  
L4191A, B and L6191A, B  
25 ... 95°C  
25 ... 95°C  
40 ... 110°C  
70 ... 140°C  
50 ... 95°C  
40 ... 110°C  
70 ... 140°C  
Panel mount (immersion)  
L4189A, B, C 25 ...  
95°C 40 ... 110°C  
110 ... 230°F  
L6189A, B, C  
25 ... 95°C  
40 ... 110°C  
70 ... 140°C  
110 ... 230°F  
Surface mount  
(with mounting strap)  
L6190A, B, C  
25 ... 95°C  
Replacement aquastat (immersion)  
L6188A 2044  
40 ... 110°C  
EN2R-9005 0406R3-NE  
4
 
FEATURES  
6.3 mm quick connect terminals for receptacles  
Mounting either in a horizontal or vertical position.  
Housing is provided with two mounting holes which are  
suitable for M4 thread forming screws, for mounting on a  
control panel.  
Cable entry in the conduit box is suitable for Pg 13.5  
conduit or is provided with a plastic grommet (at choice).  
The high and low setpoint stops are field adjustabe with  
steps of 2.5°C.  
Capillary available in 350 mm (optional), 1000 mm  
(standard), 1500 mm (optional) and 2000 mm (optional)  
length.  
Surface mounted Aquastat can be mounted on  
cylinders of 300 ... 460 mm diameter as well on pipes  
from 40 ... 150 mm diameter.  
Wide range of well assemblies available.  
5
EN2R-9005 0406R3-NE  
 
L4188 - L6188 SINGLE AQUASTAT - DIRECT IMMERSION  
APPLICATIONS AND ORDERING INFORMATION  
Application  
L4188 and L6188 are sensitive, immersion-type water  
temperature thermostats for controlling and limiting boiler  
water temperature in hydronic heating systems.  
The thermostat has a liquid-filled sensing element which fits  
into an immersion well (order separately) for direct mounting  
into a boiler, tank or other vessel.  
Ordering information  
Application  
O.S. number  
Temperature  
range  
Switch  
differential (K)  
Switch type  
Setting means  
Remarks  
(see notes)  
L4188A 2015  
L4188A 2023  
L4188A 2031  
L4188B 2005  
L4188B 2013  
Controller  
Controller  
Controller  
Controller  
Controller  
25 ... 95°C  
40 ... 110°C  
25 ... 95°C  
40 ... 110°C  
25 ... 95°C  
4
4
4
4
4
SPST  
SPST  
SPST  
SPST  
SPST  
External knob  
External knob  
External knob  
Internal screw  
Internal screw  
-
5
5
4 - 5  
4 - 5  
4 ... 10  
L6188A 2002  
L6188A 2010  
L6188A 2028  
L6188A 2036  
Controller  
Controller  
Controller  
Controller  
25 ... 95°C  
40 ... 110°C  
25 ... 95°C  
70 ... 140°C  
SPDT  
SPDT  
SPDT  
SPDT  
External knob  
External knob  
External knob  
External knob  
6
6
3
6
(adjustable)  
4 ... 10  
(adjustable)  
4 ... 10  
(adjustable)  
4 ... 10  
(adjustable)  
4 ... 10  
L6188A 2044  
L6188B 2000  
L6188B 2018  
Controller  
Controller  
Controller  
40 ... 110°C  
25 ... 95°C  
70 ... 140°C  
SPDT  
SPDT  
SPDT  
External knob  
Internal screw  
Internal screw  
Tradeline 1 - 7  
(adjustable)  
4
4
4 ... 10  
(adjustable)  
3 - 7  
4 ... 10  
L6188B 2026  
L6188B 2034  
Controller  
Controller  
40 ... 110°C  
25 ... 95°C  
SPDT  
SPDT  
Internal screw  
Internal screw  
(adjustable)  
4 ... 10  
(adjustable)  
6 - 7  
L6188B 2042  
L6188C 2008  
L6188C 2016  
Controller  
Limiter  
Limiter  
25 ... 95°C  
70 ... 140°C  
25 ... 95°C  
4
SPDT  
SPDT  
SPDT  
Internal screw  
Internal screw  
Internal screw  
Manual reset  
Manual reset  
7
6 - 7  
1 = High limit stop  
2 = High limit stop at 60°C  
3 = Capilliary length 1500 mm and mounting bracket  
4 = Without cover and conduit box  
5 = Quick connect terminals only  
6 = With well assembly  
7 = With push-in plug  
EN2R-9005 0406R3-NE  
6
 
L4188 - L6188 SINGLE AQUASTAT - DIRECT IMMERSION  
Specifications  
Ambient temperature limits  
0 ... 70°C  
Immersion wells, see page 18  
C
1
2
C
1
Electrical connection  
6.3 mm spade terminals  
+
+
Enclosure  
IP40  
Electrical rating  
SPST  
SPDT  
10 A at 250 Vac, resistive load  
2.5 A at 250 Vac, inductive load  
15 A at 250 Vac, locked motor  
250 mA at 30 mVdc (special option)  
Fig. 1. Internal schematics L4188/L6188  
Terminal data  
C-1 breaks on temperature rise (SPDT and SPST)  
C-2 makes on temperature rise (SPDT only)  
Accessories  
14.6  
11.5  
48  
5
47.1  
85  
32  
2
1
C
9
72  
30  
21  
Pg 13.5  
14.4  
4
14  
48  
48  
Fig. 2. Dimensional drawing L4188/L6188  
7
EN2R-9005 0406R3-NE  
 
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  
Application  
O.S. number  
Temperature  
range  
Switch  
differential (K)  
Switch type  
Setting means Capillary  
Remarks  
length (mm) (see notes)  
L4189A 2006  
L4189A 2014  
L4189A 2089  
L4189A 2097  
L4189A 2105  
L4189B 2012  
L6189A 2001  
L6189A 2019  
Controller  
Controller  
Controller  
Controller  
Controller  
Controller  
Controller  
Controller  
25 ... 95°C  
25 ... 95°C  
25 ... 95°C  
25 ... 95°C  
25 ... 95°C  
100 ... 230°F  
25 ... 95°C  
25 ... 95°C  
4
4
4
4
4
4
8
4
SPST  
SPST  
SPST  
SPST  
SPST  
SPST  
SPDT  
SPDT  
External knob  
External knob  
External knob  
External knob  
External knob  
Internal screw  
External knob  
External knob  
1000  
1500  
1000  
1000  
350  
1000  
1500  
1500  
2
-
1 - 4 - 5  
5
1 - 6  
3
2
-
4 ... 10  
L6189A 2043  
L6189A 2068  
L6189A 2092  
L6189A 2118  
L6189A 2134  
L6189A 2142  
L6189A 2159  
Controller  
Controller  
Controller  
Controller  
Controller  
Controller  
Controller  
40 ... 110°C  
25 ... 95°C  
SPDT  
SPDT  
SPDT  
SPDT  
SPDT  
SPDT  
SPDT  
External knob  
External knob  
External knob  
External knob  
External knob  
External knob  
External knob  
1500  
1000  
1500  
1500  
1500  
2000  
2000  
-
(adjustable)  
4
2
1
1
1
1
1
7 ... 18°F  
(adjustable)  
15°F  
7 ... 18°F  
(adjustable)  
15°F  
110 ... 230°F  
110 ... 230°F  
110 ... 230°F  
110 ... 230°F  
110 ... 230°F  
7 ... 18°F  
(adjustable)  
L6189B 2009  
L6189B 2025  
L6189B 2041  
L6189C 2007  
L6189C 2023  
L6189C 2031  
Controller  
Controller  
Controller  
Limiter  
Limiter  
Limiter  
25 ... 95°C  
25 ... 95°C  
40 ... 110°C  
40 ... 110°C  
110 ... 230°F  
110 ... 230°F  
4
4
8
SPDT  
SPDT  
SPDT  
SPDT  
SPDT  
SPDT  
Internal screw  
Internal screw  
Internal screw  
Internal screw  
External knob  
External knob  
1000  
1000  
1500  
1500  
1500  
2000  
-
2, Tradeline  
-
-
-
-
Manual reset  
Manual reset  
Manual reset  
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  
EN2R-9005 0406R3-NE  
8
 
L4189 - L6189 SINGLE AQUASTAT - PANEL MOUNTING (IMMERSION)  
SPECIFICATIONS AND DIMENSIONS  
Specifications  
Ambient temperature limits  
0 ... 70°C  
Accessories  
Immersion wells, see page 18  
Electrical connections  
6.3 mm spade terminals  
C
1
2
C
1
+
+
Enclosure  
IP40  
Electrical rating  
10 A at 250 Vac, resistive load  
2,5 A at 250 Vac, inductive load  
15 A at 250 Vac, locked motor  
250 mA at 30 mVdc (special option)  
SPST  
SPDT  
Fig. 3. Internal schematics L4189/L6189  
Terminal data  
C-1 breaks on temperature rise (SPDT and SPST)  
C-2 makes on temperature rise (SPDT only)  
Capilliary length  
350 mm, 1000 mm, 1500 mm and 2000 mm  
Mounting hole (2) for M4x20  
tread forming screw  
17  
48  
32  
16  
2 mm max  
60  
47.1  
48  
18  
32  
2
1
C
Panel  
Hole ( 4 min.) in  
panel for tool reset  
28.5  
85  
14.4 14  
48  
30.5  
5
Fig. 4. Dimensional drawing L4189/L6189  
9
EN2R-9005 0406R3-NE  
 
L6190 SINGLE AQUASTAT - SURFACE MOUNTING  
APPLICATION AND ORDERING INFORMATION  
Application  
The L6190 is a sensitive water temperature thermostat  
designed for surface mounting on domestic hot water cylinders  
or pipe work. The SPDT switching action is accomplished by a  
snap-action microswitch actuated by the temperature sensing  
element.  
The L6190 is supplied complete with mounting strap for rapid  
and easy installation. Draining of the system or tapping of the  
cylinder or pipe work is not required. The required temperature  
control point is easily set using a screw driver.  
Ordering information  
Application  
O.S. number  
Temperature  
range  
Switch  
differential (K)  
Switch type  
Setting means  
Strap length  
(mm)  
L6190A 2016  
L6190B 2006  
L6190B 2014  
L6190B 2022  
Surface mounting  
Surface mounting  
Surface mounting  
Surface mounting  
25 ... 95°C  
25 ... 95°C  
25 ... 95°C  
25 ... 95°C  
8
8
12  
4
SPDT  
SPDT  
SPDT  
SPDT  
External knob  
External setting  
External setting  
External setting  
250  
2000  
2000  
2000  
4 ... 10  
(adjustable)  
L6190B 2030  
Surface mounting  
25 ... 95°C  
SPDT  
Internal setting  
250  
L6190C 2004  
L6190C 2012  
Surface mounting  
Surface mounting  
25 ... 95°C  
25 ... 95°C  
Manual reset  
Manual reset  
SPDT  
SPDT  
Internal setting  
Internal setting  
2000  
2000  
EN2R-9005 0406R3-NE  
10  
 
L6190 SINGLE AQUASTAT - SURFACE MOUNTING  
SPECIFICATIONS AND DIMENSIONS  
Specifications  
Ambient temperature limits  
0 ... 70°C  
Capilliary length  
55 mm  
Electrical connection  
6.3 mm spade terminals or screw terminals  
2
C
1
+
Enclosure  
IP40  
Electrical rating  
10 A at 250 Vac, resistive load  
2,5 A at 250 Vac, inductive load  
15 A at 250 Vac, locked motor  
SPDT  
Fig. 5. Internal schematic L6190  
Terminal data  
C-1 breaks and C-2 makes on temperature rise  
48  
24  
26.5  
6
12  
72  
100  
92  
9
30  
51  
24  
Fig. 6. Dimensional drawing L6190  
11  
EN2R-9005 0406R3-NE  
 
L4191 - L6191 DUAL AQUASTAT - DIRECT IMMERSION  
APPLICATION AND ORDERING INFORMATION  
Application  
L4191 and L6191 are dual units in which two independently  
working water temperature thermostats are housed in one  
cover. Each thermostat has a separate liquid filled sensing  
element which fits into a common immersion well for direct  
mounting into a boiler, tank or other vessel. One thermostat,  
with external temperature setting dial, acts as a controller  
while the other, with internal setting dial, acts as a high limit  
control.  
Two main types are available, one with controller and auto  
recycling high limit and the other with controller and high limit  
with manual reset.  
Ordering information L4191  
Application  
O.S. number  
Temperature  
range  
Switch  
differential (K)  
Switch type  
Setting means  
Remarks  
(see notes)  
Controller  
Limiter  
Controller  
Limiter  
Controller  
Limiter  
Controller  
Limiter  
25 ... 95°C  
25 ... 95°C  
25 ... 95°C  
25 ... 95°C  
70 ... 140°C  
70 ... 140°C  
25 ... 95°C  
25 ... 95°C  
4
4
4
4
SPST  
SPST  
SPST  
SPST  
SPST  
SPDT  
SPST  
SPDT  
External knob  
Internal screw  
External knob  
Internal screw  
External knob  
Internal screw  
External knob  
Internal screw  
9
9
L4191A 2002  
L4191A 2010  
L4191B 2018  
L4191B 2042  
7 - 9 - 10  
9
6
1
5 - 9 - 10  
9 - 10  
4
Manual reset  
4
Manual reset  
1 =Gold contacts for thermocouple applications, without jumper  
2 =High limit stop at 80°C/low limit stop at 60°C  
3 =High limit stop at 82°C  
7 =With well assembly  
8 =High limit stop  
9 =With jumper  
4 =Low limit stop at 95°C  
10 =With push-in plug  
11 =Without knob and index  
5 =Isolated neutral terminal  
6 =High limit stop at 95°C  
Ordering information L6191  
O.S. number  
Application  
Temperature  
Switch  
Switch type  
Setting means  
Remarks  
range  
differential (K)  
(see notes)  
4 ... 10  
(adjustable)  
Controller  
40 ... 110°C  
SPDT  
External knob  
6 - 7 - 9  
L6191A 2007  
Limiter  
Controller  
Limiter  
Controller  
Limiter  
Controller  
Limiter  
40 ... 110°C  
25 ... 95°C  
101°C fixed  
50 ... 95°C  
101°C fixed  
25 ... 95°C  
40 ... 110°C  
40 ... 110°C  
40 ... 110°C  
4
4
4
4
4
4
SPDT  
SPDT  
SPST  
SPDT  
SPST  
SPDT  
SPDT  
SPDT  
SPDT  
Internal screw  
External knob  
Internal setting  
External knob  
Internal screw  
External knob  
Internal screw  
External knob  
Internal screw  
9
3
1
3
L6191A 2015  
L6191A 2023  
L6191B 2005  
L6191B 2013  
1
7 - 9 - 10  
9
5 - 6 - 7 - 9  
9
Manual reset  
4
Manual reset  
Controller  
Limiter  
4 ... 10  
Controller  
Limiter  
70 ... 140°C  
70 ... 140°C  
70 ... 140°C  
SPDT  
SPDT  
SPDT  
External knob  
Internal screw  
External knob  
4 - 7 - 9  
9
(adjustable)  
L6191B 2021  
Manual reset  
4 ... 10  
(adjustable)  
Controller  
4 - 7 - 9 - 11  
L6191B 2047  
L6191B 2054  
Limiter  
Controller  
Limiter  
70 ... 140°C  
25 ... 95°C  
50 ... 95°C  
Manual reset  
4
Manual reset  
SPDT  
SPDT  
SPDT  
Internal screw  
External knob  
Internal screw  
9
7 - 10  
1 =Gold contacts for thermocouple applications, without jumper  
2 =High limit stop at 80°C/low limit stop at 60°C  
3 =High limit stop at 82°C  
7 = With well assembly  
8 = High limit stop  
9 = With jumper  
4 = Low limit stop at 95°C  
10 =With push-in plug  
11 = Without knob and index  
5 = Isolated neutral terminal  
6 = High limit stop at 95°C  
EN2R-9005 0406R3-NE  
12  
 
L4191 - L6191 DUAL AQUASTAT - DIRECT IMMERSION  
SPECIFICATIONS AND DIMENSIONS  
Specifications  
Ambient temperature limits  
0 ... 70°C  
C
1
C
1
C
1
2
C
1
Electrical connection  
6.3 mm spade terminals  
+
+
+
+
Enclosure  
IP40  
Electrical rating:  
SPST SPST  
Control Limit  
SPST  
Control  
SPDT  
Limit  
10 A at 250 Vac, resistive load  
2,5 A at 250 Vac, inductive load  
15 A at 250 Vac, locked motor  
250 mA at 30 mVdc (special option)  
2
C
1
C
1
2
C
1
2
C
1
Terminal data  
C-1 breaks on temperature rise  
C-2 makes on temperature rise  
+
+
+
+
Accessories  
Immersion wells, see page 18  
SPDT SPDT  
Control Limit  
SPDT  
Control  
SPDT  
Control  
Fig. 7. Internal schematics  
14.6  
11.5  
ϕ 5  
ϕ 47.1  
85  
72  
30  
ϕ 21  
Pg 13.5  
4
84  
48  
Fig. 8. Dimensional drawing L4191/L6191  
13  
EN2R-9005 0406R3-NE  
 
L6188A 2044 TRADELINE SINGLE AQUASTAT - DIRECT IMMERSION  
APPLICATIONS AND ORDERING INFORMATION  
Application  
L6188A 2044 Tradeline Aquastat is a sensitive immersion-type  
water temperature thermostat for regulating and limiting boiler  
water temperature in hydronic heating systems.  
The Honeywell Tradeline technique of using adapters enables  
the L6188A 2044 Aquatat thermostat to field replace  
Honeywell Aquastat thermostats as well as many competitive  
devices (using the existing well*). No draining of the system is  
needed. Ideal for service organisations to stock since only one  
Aquastat is needed for most calls.  
* If a new immersion well is needed order separately.  
Ordering information L6188A 2044  
O.S. number  
Application  
Temperature  
range  
Switch  
differential (K)  
Switch type  
Setting means  
Remarks  
(see notes)  
4 ... 10  
(adjustable)  
L6188A 2044  
Controller  
40 ... 110°C  
SPDT  
External knob  
1
1 = High limit stop at 95°C/low limit stop at 50°C  
EN2R-9005 0406R3-NE  
14  
 
L6188A 2044 TRADELINE SINGLE AQUASTAT - DIRECT IMMERSION  
SPECIFICATIONS AND DIMENSIONS  
Specifications  
Temperature range  
40 ... 110°C  
Accessories  
Immersion wells, see page 18  
Differential  
4 ... 10 (adjustable)  
2
C
1
+
Limit stops:  
Low limit: adjustable, factory set at 50°C  
High limit: adjustable, factory set at 95°C  
Ambient temperature limits  
0 ... 70°C  
SPDT  
Electrical connection  
6.3 mm spade terninals  
Fig. 9. Internal schematic  
Enclosure  
IP40  
Electrical rating  
10 A at 250 Vac, resistive load  
2,5 A at 250 Vac, inductive load  
15 A at 250 Vac, locked motor  
Terminal data  
C-1 breaks on temperature rise  
C-2 makes on temperature rise  
14.6  
11.5  
48  
5
47.1  
85  
32  
2
1
C
9
72  
30  
21  
Pg 13.5  
14.4  
4
14  
48  
48  
Fig. 10. Dimensional drawing L6188A 2044  
15  
EN2R-9005 0406R3-NE  
 
PERFORMANCE  
Fixed switch differential  
On controls and recycling limits a fixed differential of:  
Ambient temperature error  
Ratio of ambient error  
With capilliary lenth of 1000 mm  
With capilliary lenth of 50 mm  
Max. setting Min. setting  
4
1.5°C, 8 3°C or  
12 3°C is supllied as a standard.  
1 : 5.5  
1 : 12  
1 : 8.5  
1 : 25  
Optional are:  
2.7°F,  
Example:  
7
An ambient error ratio of 1 : 6 means that an ambient  
change of 6°C will cause a setpoint shift of the Aquastat of  
1°C.  
14 5.4°F  
15 5.4°F  
Adjustable switch differential  
On controllers and recycling limiters an adjustable differential  
of:  
Time constant  
With well  
4
7
1.5°C ... 10 3°C or  
2.7°F ... 18 5.4°F can be supllied.  
τ ≤ 30 s for panel mounted, single direct mounted, dual  
direct mounted and triple direct mounted Aquastats.  
Without well  
τ ≤ 4 s  
With sensor assy (Surface mounted Aquastat)  
τ ± 50 s  
Manual or tool reset switch differential  
On the thermal cut-out versions (manual or tool reset) of the  
panel mounted, the single direct mounted and the dual direct  
mounted Aquastats the maximum reset differential might be  
30°C  
Setpoint accuracy  
+0/-8°C for thermal cut-outs  
NOTE: The differential (thermal) is dependant on the rate of  
change of the temperature in the heating system.  
The given differential datas are valid for a rate of1°C  
per minute.  
EN2R-9005 0406R3-NE  
16  
 
CONSTRUCTION  
All aquastats have the following common parts  
Dual direct mounted Aquastat needs the following extra parts  
Thermoplastic housing of mainly rectangular form. This  
housing is the carrier of the Micro Switch mechanism, the  
6.3 mm quick connect terminals, the lever mechanism and  
the adjusting mechanism.  
Two single thermoplastic conduit boxes (a right and a left  
one) with cable entry.  
A dual thermoplastic front cover to protect against touching  
of live parts.  
Thermoplastic switch cover, which protects the switch  
A thermoplastic top cover for covering of units with internal  
mechanism and which fits in the above mentioned housing.  
setting.  
Auxiliary parts to make it possible to use the quick connect  
An adjustable dial for the Micro Switch differential (if  
terminals also for screw connection.  
applicable).  
External circular setting knob with scale and an index or  
A bracket on the rear side of the Aquastat to connect both  
internal setting with scale.  
basic units together and which fits into a dual well.  
Liquid filled sensing element with or without a remote bulb.  
This element is via a mounting plate connected to the rear  
side of the thermoplastic housing  
Well assembly in which the bulb of the sensing elements  
fits. For the dual direct mount aquastat and triple direct  
mount aquastat the well is enable to contain two resp. three  
bulbs.  
Surface mounted Aquastat needs the following extra parts  
A thermoplastic conduit box with a cable entry  
A thermoplastic front cover to protect against touching of  
live parts.  
A thermoplastic top cover with scale for covering of unit with  
internal setting.  
NOTE: The surface mounted Aquastat does not have a  
well, but the bulb is enveloped by a sensor  
assembly of mainly rectangular form which is  
mounted on the rear side of the thermoplastic  
housing.  
A fastening strap with fastener, to mount the Aquastat on  
the surface of boiler or pipe.  
Triple direct mounted Aquastat needs the following extra parts  
Three single thermoplastic conduit boxes with a cable entry.  
A dual and a single thermoplastic front cover.  
A reset button for the switch mechanism, manual or tool  
reset, with exception of the surface mounted Aquastat,  
which does not have such a button.  
Two thermoplastic top covers for covering of units with  
internal setting.  
Single direct mounted Aquastat needs the following extra parts  
An adjustable dial for the Micro Switch differential (if  
A thermoplastic conduit box with a cable entry.  
applicable).  
A thermoplastic front cover to protect against touching of  
Two brackets on the rear side of the Aquastat to connect  
the three basic units together and which fits into a triple  
well.  
live parts.  
A thermoplastic top cover for covering of units with internal  
setting.  
An adjustable dial for the Micro Switch differential (if  
applicable).  
17  
EN2R-9005 0406R3-NE  
 
ACCESSORIES AND SPARE PARTS  
Single well assembly  
Description  
Ordernumber  
Packing qty  
(pcs)  
40  
1
Spud thread: / BSPT  
45.900.409-003  
2
Maximum insertion length (including thread): 105 mm  
Suitable for Ø 5 mm sensor  
1
Spud thread: / BSPT  
45.900.409-006  
100  
2
Maximum insertion length (including thread): 170 mm  
Suitable for Ø 5 mm sensor  
Dual well assembly  
Description  
Ordernumber  
Packing qty  
(pcs)  
20  
1
Spud thread: / BSPT  
45.900.409-007  
2
Maximum insertion length (including thread): 105 mm  
Suitable for two Ø 5 mm sensors.  
1
Spud thread: / BSPT  
45.900.409-008  
20  
2
Maximum insertion length (including thread): 105 mm  
Suitable for two Ø 5 mm sensors when used with spring.  
Without spring suitable for three or four Ø 5 mm sensors.  
Supplied with spring  
EN2R-9005 0406R3-NE  
18  
 
Miscellaneous  
Description  
Ordernumber  
Packing qty (pcs)  
Knob assembly  
Scale range: 110 ... 230°F, high limit stop: 180°F  
45.900.427-002  
200  
Knob assembly  
45.900.427-003  
45.900.443-001  
200  
50  
Scale range: 40 ... 110°C, high limit stop: 82°C  
Strap set for L6190 surface mounted aqustat  
Strap length: 2000 mm  
Key  
Description  
Part number  
number  
1
2
Fixing screw for front covers of single and dual aquastats  
Knob  
45.002.700-001  
Scale range  
40 ... 110°C  
70 ... 140°C  
25 ... 95°C  
40 ... 110°C  
70 ... 140°C  
40 ... 110°C  
25 ... 95°C  
40 ... 110°C  
25 ... 95°C  
70 ... 140°C  
25 ... 95°C  
1 ... 7 (40 ... 110°C)  
50 ... 95°C  
40 ... 110°C  
25 ... 95°C  
80 ... 100°F  
110 ... 230°F  
160 ... 280°F  
110 ... 230°F  
110 ... 230°F  
Low limit stop  
-
-
-
High limit stop  
-
-
-
95°C  
-
95°C  
82°C  
100°C  
60°C  
95°C  
80°C  
85°C  
82°C  
82°C  
80°C  
-
45.002.823-001  
45.002.823-002  
45.002.823-003  
45.002.823-004  
45.002.823-005  
45.002.823-006  
45.002.823-007  
45.002.823-008  
45.002.823-010  
45.002.823-011  
45.002.823-013  
45.002.823-014  
45.002.823-015  
45.002.823-017  
45.002.823-019  
45.004.213-001  
45.004.213-002  
45.004.213-003  
45.004.213-004  
45.004.213-005  
45.002.547-002  
45.000.219-015  
45.002.797-001  
45.002.540-001  
45.002.802-001  
-
95°C  
50°C  
-
-
-
-
60°C  
-
-
-
40°C  
-
-
-
-
-
-
-
200°F  
180°F  
3
4
5
6
7
Cover for single Aquastat  
Screw  
Wire clamp  
Conduit box  
Push in plug  
19  
EN2R-9005 0406R3-NE  
 
QUALITY ASSURANCE STATEMENT  
Products are manufactured under an ISO 9001 (1994) based  
and certified Quality System.  
Assembly processes are guided by work instructions. Patrol  
inspections form part of the assembly processes.  
The quality system is described in the Honeywell Combustion  
Controls Center Quality Assurance Programme and its related  
operational procedures and instructions.  
At the end of the assembly phase, all aqustats are leakage  
and performance tested/adjusted.  
Assembly inspection is performed by employees of the quality  
control department, using their own equipment.  
The quality system is approved by Gastec against certificate  
number 9.302/2.  
All inspections (incoming and assembly) are performed by  
trained personel and according inspection procedures.  
The quality organisation is responsible for defining,  
maintaining, improving and verification of the quality systems  
in the field of design, production process and field quality  
service.  
STANDARDS AND APPROVALS  
Standards  
Approvals  
The L41../L61.. series Aquastats have been designed  
according the Low Voltage Directive 73/23/EEC.  
An additional approval is obtained from DIN in Germany  
according to DIN 3440 as thermostat (TR) or temperature  
limiter (TW).  
This Low Voltage Directive is covered by approvals in  
Denmark, Finland, Norway, Sweden and Switserland.  
In North-America approvals have been obtained from UL,  
AGA and CSA.  
EMC Directive 89/336/EEC:  
The snap action switch ensures in most cases a switching  
action in less than 10 ms, which satisfies EMC-Directive  
without further measures.  
The exception is a highly inductive low current load combined  
with slow rate of temperature change, which requires  
additional suppression means. For this reason compliance  
with the EMC-Directive cannot be claimed.  
Europen countries accept above certificates as basis for  
appliance approval.  
EN2R-9005 0406R3-NE  
20  
 
ORDERING INFORMATION  
When ordering specify  
Setting point(control and limit if necessary)  
Type of contact (SPDT/SPST/ electrical rating)  
Number of sensing point (single/dual)  
Type of mounting (direct immersion/panel/surface)  
Differential (adjustable/fixed/manual reset)  
Capillary length  
Ordering Specification number  
L
X A 9999  
4 1 X  
L: Aquastat  
Specification number  
Control contact:  
4: SPST  
6: SPDT  
A: Single: knob setting  
Dual: automatic reset limiter  
B: Single: internal setting (screw)  
Dual: manual reset limiter  
C: Single: manual reset  
1: Family  
88: Single aquastat, direct immersion  
89: Single aquastat, panel mounting  
90: Single aquastat, surface mounting  
91: Dual aquastat, direct mounting  
92: Triple aquastat, direct mounting  
Fig. 11. Model number chart  
21  
EN2R-9005 0406R3-NE  
 
Home and Building Control  
Combustion Control Center Europe  
Honeywell BV  
Phileas Foggstraat 7  
7821 AJ Emmen  
The Netherlands  
Tel.: +31 (-)591 695911  
Fax: +31 (-) 591 695200  
EN2R-9005 0406R3-NE  
22  
 

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