Raumtherm
Safety information!
Expert electricians only may open this device in due compliance with the wiring
diagram shown in the housing cover / on the housing / represented in the
corresponding operating instructions. All expert electricians charged with the
execution of such works must comply with the relevant safety regulations
currently operative and in force. Caution: The operation of the controller in the
vicinity of other devices that do not comply with the EMC directives may affect
its functions. The company charged with the installation of the device must,
after the completion of the installation works, instruct the user of the control
system into its functions and in how to operate it correctly. These operating
instructions must be kept at a place that can be accessed freely by the
operating and/or servicing personnel in charge.
Contents
1.
Application
2.
Functional description
2.1 Control characteristics during operation / neutral zone /
luminous indications
2.2 Option to select between internal or external sensor-based operation
2.3 Fan function
2.4 ON/OFF function
3.
Installation / mounting
3.1 Limitation of the temperature setting range
4.
Accessories
5.
Technical data
6.
Data table with external sensor data (characteristic curve)
7.
Wiring diagrams and dimensioned drawings / overview of switch positions
8.
Warranty
1. Application
The air-conditioning controller desribed in these instructions has been specially
devised for the control and triggering of fan coils, fan coil units and other air-
supported air conditioning systems used with valve-equipped 4-pipe systems
(normally closed valve types). The device is suited for use as internal sensor-
equipped single room temperature controller or, in combination with a remote
sensor, as external control device. Regarding other applications not to be
foreseen by the manufacturer of this device, the safety standards concerning
these applications need to be followed and adhered to. Regarding the suitability
of the device for such applications, please refer to section 8. herein.
2. Functional description
The switching difference of the controller comes to approx. 0.5K. The
calculation of the control characteristics specified hereafter by way of example
bases on an expected control deviation of the controlled system of 1K.
2.1 Control characteristics during operation
neutral zone / luminous indications
The neutral zone can be set within a range from 0.5 to 6K (factory setting 2K). It
corresponds to 2K and begins at the heating switch-off point. If set to 22°C, the
heating will be set to a temperature above 22°C while operating in heating
mode and down to a temperature below 25°C while operating in cooling mode.
In both heating and cooling mode, the switching difference comes to approx.
1K. If set to 22°C, the heating switch-off point is thus at approx. 23°C and the
cooling switch-off point at approx. 26°C. As long as the heating output is active,
the lamp behind the setting mark lights red. After deactivation of the heating
output the fan will continue operating for approx. one minute. The lamp behind
the setting mark blinks red during this time. Once the cooling output is activated,
the lamp in the setting mark blinks blue.
2.2 Option to select between internal or external
sensor-based operation
The selector switch S2 (see section 7.) enables to set the device for either the
utilisation of the internal (factory setting) or the external sensor. The terminals
12 and 13 have been provided for the connection of the external sensor. For a
selection of suitable sensors, please refer to section 4., "Accessories".
2.3 Fan function
The controller is equipped with a 3-speed switch for the selection of the desired
fan level. The switch S1 (see section 7.) enables to set the fan ON (factory
setting) or OFF within the neutral zone. In order to enable the internal sensor to
detect the room temperature in an optimal manner, we recommend setting the fan
in the neutral zone to ON when controlling temperature equalization systems that
feature a fan-assisted convection of the ambient air. The fan is permanently
activated in this case. If setting the fan to OFF within the neutral zone, it remains
deactivated across the entire temperature range, i.e. between the switch-off points
"heating" and "cooling" (= neutral zone, see diagram "Switch-points"). The
triggering of the fan takes place in a potential-free manner, which enables to
control fan motors with separated windings or fan motors using a step trans-
former.
Caution:
No protection class III fans or consumers must be connected!
2.4 ON/OFF function
The ON/OFF switch enables to activate or deactivate the control system.
3. Installation / mounting
The device is, depending on its size, either delivered in closed, or, in order to
facilitate its installation, in opened condition. After its installation, its electrical
connection and the safe separation between mains voltage and safety extra low
voltage using the enclosed partition (see section 7.), the housing cover needs to
be closed by hooking the lower hooks in the housing and folding the cover upward
until it clicks into place. Following this, the housing cover should be secured using
the accompanying screw. For opening it, proceed in inverse order to closing.
Caution:
When using an external sensor, care must be taken to ensure that the
sensor line is not laid in parallel to line voltage carrying cables or lines. Where
parallel laying cannot be avoided, a shielded line is to be used and the shielding to
be connected to the terminal 13, 15 or 17. In order to ensure the easy
replacement of a defective sensor, the sensor including its line needs to be laid
inside an empty conduit in a replaceable manner. The controller is determined for
wall mounting or installation on an UP box and must not be exposed to direct heat
or cold sources. Also care must be taken to ensure that the device is not exposed
to the influence of foreign heat or cold sources that warm or cool the device at its
back (through air flows in cavity walls or the temperatures radiated by ascending
pipelines, f. ex.).
3.1 Limitation of the temperature setting range
The mobile setting elements underneath of the control knob enable to delimit the
setting range of the controller mechanically. For this purpose, remove the control
knob and set the stops as required (red stop for maximum temperature and blue
stop for minimum temperature). Once this has been done, the control knob can be
put on again.
4. Accessories
External temperature sensor for use in air ducts or conduits or inside of rooms:
LF-2 (cable design air sensor) or HF-2 (sleeve sensor) or GFL-2 (air conduit or air
duct sensor for direct installation at the conduit or duct) or BTF-2 (ambient
temperature sensor for surface installation).
Typ 196000148925
Electronic Air-conditioning
Controller
