User Manual

Notes
In systems with automatic changeover, the temperature sensor can be replaced by an
external switch for manual changeover.
In systems with continuous heating operation, no sensor will be connected to the con-
troller’s input.
With continuous cooling operation, the controller input (B2–M) must be bridged.
Mounting, installation
and commissioning
Mounting location: on a wall or inside the fan coil unit Not in niches or bookshelves, not
behind curtains, above or near heat sources and not exposed to direct solar radiation.
Mounting height is about 1.5 m above the floor. The connecting wires can be run to the
controller from a recessed conduit box.
Check the settings of the DIL switches no. 1 and no. 2 and change them, if required. If
setpoint limitation is required, use the minimum and maximum limitation facility (energy
saver).
After applying power, the controller makes a reset during which the fan LED flashes,
indicating that the reset has been correctly made. This takes about 3 seconds. Then,
the LED stops flashing and the controller will be ready to operate.
Before the controller starts its control action, it performs a three-position synchroniza-
tion of the actuator. As a result, the actuator will be fully opened and then closed again.
This process takes 400 seconds. Then, the controller will be ready to operate.
• Prior to fitting the changeover sensor, thermal conductive paste must be applied to
the location on the pipe where the sensor is placed
• The cables used must satisfy the insulation requirements with regard to mains poten-
tial
• Sensor input B2-M carries mains potential. If the sensor’s cables must be extended,
the cables used must be suited for mains voltage
The controller is supplied with Mounting Instructions.
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Siemens Building Technologies Room temperature controller CE1N3026en
HVAC Products 12.06.2003