L641 SURFACE CONTACT THERMOSTAT
EN0R 8444
2
DIMENSIONS
SPECIFICATIONS
INSTALLATION
Dimensions in millimetres (inches in brackets)
Supply
voltage
:
230 V~, 50...60 Hz
Switch action
:
S.P.D.T. Type 1CL
Switch rating
:
4(2) A, 230 V~
Temperature
setting range
:
see table
Differential
:
Approximately 10 K non-adjustable
Surface
temperature
range
:
0 to 95
o
C
Ambient
temperature
range
:
0 to 70
o
C
Mounting
:
L641A mounts directly onto cylinder
using fixing strap provided
L641B mounts directly onto pipes
using fixing springs provided
Dimensions
:
44 x 79 x 54mm (1.73" x 3.11" x
2.13")
(w x h x d)
Wiring
:
3 terminals with wiring clamps,
accepting wires up to 1.5 mm
2
Mounting
The L641A cylinder thermostat should be mounted
1
/
4
to
1
/
3
of the way from the bottom of the domestic hot water cylinder
after removing a section of the insulation and cleaning the
surface.
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.
IMPORTANT
1. The installer must be a trained service
engineer
2. Disconnect the power supply before beginning
installation
ORDERING SPECIFICATION
Model
Application
Temperature
Setting Range
L641Al039
Cylinder
Thermostat
Min, 40 to 80
o
C
L641Bl004
Low Limit Pipe
Thermostat
Min, 10 to 40
o
C
L641B1012
High Limit Pipe
Thermostat
50 to 95
o
C
L641Bl020
High Limit Pipe
Thermostat
40 to 95
o
C
Wiring
Cover removal
Wiring to terminals