Honeywell L641 Surface Contact Thermostat Instructions
L641 SURFACE CONTACT THERMOSTAT
SPECIFICATIONS
ORDERING SPECIFICATION
Supply voltage
Switch action
Switch rating
230 V~, 50...60 Hz
S.P.D.T. Type 1CL
4(2) A, 230 V~
see table
Model
Application
Temperature
Setting Range
L641Al039
L641Bl004
L641B1012
Cylinder
Thermostat
Min, 40 to 80 o C
Min, 10 to 40o C
50 to 95oC
Temperature
setting range
Low Limit Pipe
Thermostat
Differential
Approximately 10 K non-adjustable
0 to 95oC
High Limit Pipe
Thermostat
Surface
temperature
range
Ambient temp.
range
0 to 70oC
Mounting
L641A mounts directly onto cylinder
using fixing strap provided
L641B mounts directly onto pipes
using fixing springs provided
Dimensions
Wiring
44 x 79 x 54mm (1.73" x 3.11" x 2.13")
(w x h x d)
3 terminals with wiring clamps,
accepting wires up to 1.5 mm2
Approvals
L641 is CE, RoHs and WEEE
compliant. For regulatory information,
DoC / CoC number D0005. Product
must be wired as shown for CE
compliance
DIMENSIONS
IMPORTANT
1. The installer must be a trained service engineer
2. Disconnect the power supply before beginning
installation
Dimensions in millimetres (inches in brackets)
INSTALLATION
Mounting
Wiring
Cover removal
The L641A cylinder thermostat should be mounted 1/4 to1/3 of
the way from the bottom of the domestic hot water cylinder
after removing a section of the insulation and cleaning the
surface.
Wiring to terminals
The L641B pipe thermostat should be positioned less than
0.6 m (2') from the boiler, or on a supply pipe to a fan-coil
unit, close to the 3-port control valve.
l641-en0r8444-uk07r0515
2
| General | Details |
|---|---|
| Name | Honeywell L641 Surface Contact Thermostat Instructions |
| Make | Honeywell |
| Language | English |
| Filetype | PDF (Download) |
| File size | 0.15 MB |
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