Honeywell L641A User manual

HEATING CONTROLS
4.18
L641A/L6190B
CYLINDER THERMOSTATS
FEATURES
L641A
■
Ideal for general applications
■
Suitable for use on uninsulated
and foam lagged cylinders
■
Surface mounted
■
Double insulated
■
Dial or screwdriver slot
temperature adjustment
■
Cylinder strap & hooks
L6190B
■
Commercial construction
■
Large adjustment dial
■
Wide temperature range
■
Liquid-filled probe
■
Surface mounted
APPLICATION
The L641A Cylinder Thermostat is designed for surface mounting
on domestic hot water cylinders. It can be used to switch directly
a wet central heating circulating pump or boiler, or to operate
spring return and motor open/motor close zone valves.
The L6190B is a high limit control thermostat, which has a
tamperproof concealed adjustment. The liquid filled probe means
highly responsive temperature control.
© Hone well Control Products and S stems, Issue 10
0014_Section 4_dft10_v4.qxd:Section 2_dft9 15/10/07 16:20 Page 37

CYLINDER THERMOSTATS L641A/L6190B
■Installation
The L6190 and L641 can be
installed horizontally or vertically.
The Cylinder Thermostats can be fixed
to the surface of a cylinder or
pipework using the mounting straps
provided and does not require the
system to be drained.
If located on a cylinder, the
recommended position is 1
/
3up from
the bottom of the cylinder. Any foam
lagging should be removed to allow
firm contact with the cylinder.
■Ordering Specification
L641A1039
Cylinder Thermostat, setting 40 to
80˚C, Diff. 10°C. With strap & optional
dial
L6190B1014
Cylinder Thermostat, setting 25 to
95˚C, Diff. 12°C with strap
■Specification
L641B
Switch Rating : 230VAC, 4A resistive, 2A inductive
Switch Type : Single pole, double throw (SPDT)
Ambient Temperature Range : 0 to 55˚C
Surface Temperature Range : 0 to 95˚C
IP Rating : IP40
Standards : EN 60730
Approvals : 89/336/EEC, 73/23/EEC
L6190B
Switch Rating : 250VAC, 10A resistive, 2.5A inductive
Switch Type : Single pole, double throw (SPDT)
Ambient Temperature Range : 0 to 70˚C
Surface Temperature Range : 0 to 95˚C
IP Rating : IP40
Standards : CE, UL, AGA, CSA
Approvals : 73/23/EEC, DIN3440
■Dimensions (mm)
■Wiring
C12
Terminals C and 2 make on
temperature rise.
Terminals C and 1 make on
temperature fall.
© Hone well Control Products and S stems, Issue 10, 4.18
0014_Section 4_dft10_v4.qxd:Section 2_dft9 15/10/07 16:20 Page 38