Honeywell 1EN2R-9005 0406R3-NE User Manual

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EN2R-9005 0406R3-NE

The L41../L61.. series aquastats are sensitive water tempera-
ture control, which are provided with a liquid filled sensing sys-
tem.

The following main types are available:

• Single, panel mount immersion

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.

• 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.

• 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.

The L41../L61.. series aquastats can be divided in the 
following main types:
• Controller

Controls the water temperature in accordance with the 
setting of an external knob (TÜV-type TR)

• Recycling limit control

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).

• 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.

• 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.