User guide

11-14
Water thermostats
http://products.ecc.emea.honeywell.com/europe
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Water thermostats
Surface mounting thermostat for applications with hot water storage cylinders or water pipes.
For temperature control of hot water storage cylinders, high and low temperature limiting on water
pipes, and automatic heat/cool changeover for 2-pipe fan-coil systems.
Water temperature control thermostat, 230Vac, SPDT output, L641
Approvals CE
Protection class IP30
Switch function/capacity SPDT 230Vac, 4 A resistive, 2 A inductive
Wiring connection Screw terminals (x3)
Terminal max. wire size 1,5 mm
2
Differential fixed 10
o
C
Media temp. 0 ... 95
o
C
Ambient temperature 0 ... 70
o
C
Temperature element bimetal
Housing (HxWxD) 79 mm; 44 mm; 54 mm
Additional description Thermostat delivered with mounting strap for cylinders (L641A) or
mounting springs for pipes (L641B).
• A manual setting knob is supplied with L641A.
• A tamperproof cover is supplied with L641B.
Suitable for Temp. setpoint range Mounting place Tamperproof cover Type
o
C
water temperature control 40 ... 80 on cylinder – L641A1039
low limit or H/C changeover 2 ... 40 strap on pipe supplied L641B1004
high limit 50 ... 95 strap on pipe supplied L641B1012