Gira 397 User manual

Operating Instructions
Room Temperature Controller
24/5 (2) A~ with 2-way switch
0397 ..

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Contents
Operating instructions
Room temperature controller 24/5 (2) A~ with 2-way
switch

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Installation of the room temperature controller
Area of application
The room temperature controller is used to control
the temperature in closed rooms, such as apart-
ments, schools, lecture halls, workshops etc.
Installation site
• Install the room temperature controller on an inte-
rior wall and, if possible, directly across from the
heat source.
• Comply with the recommended installation height of
approx. 1.5 m above the floor.
• The permissible relative humidity may not exceed
the max. of 95 %.
Avoid condensation.
• Avoid exterior walls and draughts from windows
and doors.

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• Ensure that the normal convective air of the room
can reach the room temperature controller unim-
peded. For this reason, the controller is not to be
mounted within shelf walls or behind curtains or
similar coverings.
• Heat from other sources negatively influences con-
troller precision. For this reason, avoid direct sun-
light and objects which emit heat (televisions,
heaters, lamps, chimney, heating pipes etc.).
• Dimmers also generate heat!
If the room temperature controller is used in con-
junction with a dimmer, the distance between the
two should be as great as possible. If aligned verti-
cally, the room temperature controller should be
installed below the dimmer.

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Installation site

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Installation
The room temperature controller is mounted in a
58-mm flush-mounted box in accordance with
DIN 49 073.
To install the room temperature controller, proceed
as follows:
1. Remove housing cover:
Pull off setting knob.
Loosen cover screw.
Pull off cover.
Attention
Installation and mounting of electrical devices may
only be carried out by a qualified electrician.
If the mounting and installation instructions are not
complied with, a danger of fire and other dangers
can arise.

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2. Electrical connection in accordance with wiring
schematic (see Page 10).
3. Mount device into flush-mounted box with
screws.
Attention: Always mount support ring on wallpa-
per. The support ring may not be wallpapered
over when renovating.
4. Set housing cover with cover frame in place.
Engage housing cover at the top left in the hous-
ing basis and tighten screw.
Attach setting knob.

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Electrical connection.
Connect all cables in accordance with the wiring
schematic (see Page 10). If this is not done, great
temperature fluctuations will result, as the room
temperature controller cannot work properly.
An earthed connection is not required, as the device
is double insulated.
Attention
Errors during connecting can lead to damage to the
controlling device! No liability is accepted for dam-
age caused by incorrect connection and/or improper
handling!

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Wiring schematic

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Key to wiring diagram
L,N= power supply
= connection for clock signal for temperature
reduction
= heating load connection
= cooling load connection
RF = resistance for heat return

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Setting the temperature limits
Two setting rings are found
in the setting knob. You
can set the temperature
limits as desired with them.
The temperature controller
is set to the maximum set-
ting range of 5 °C to
30 °C at the factory.
Setting procedure
To set the temperature limits (in this example: min. 8 °C,
max. 23 °C):
1. Turn the setting knob to the centre of the desired
setting range.
Example: The centre between 8 °C und 23 °C is
15 °C.
2. Pull off setting knob.

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3. To set the red setting
ring to the upper temper-
ature limit (23 °C here):
Insert a pointy object
(e.g. pen) into one of the
holes of the red ring.
Rotate the red ring anti-
clockwise to 23 °C.
The outer numbers of
the scale apply here.

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4. To set the blue setting
ring to the lower temper-
ature limit (8 °C here):
Insert a pointy object
(e.g. pen) into the hole
of the blue ring. Rotate
the blue ring clockwise
to 8 °C.
The inner numbers of
the scale apply here.
5. Attach setting knob. Here, the indicator must be
located approximately at the centre of the new
setting range (see Item 1).
Example: approx. 15 °C.

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Temperature adjustment
When commissioning the room temperature control-
ler, note that the thermo-bimetal requires a certain
amount of time to adjust to the room temperature.
This is why the switching point will deviate from the
room temperature immediately after mounting or
after night-time heating reduction switches off. The
switching point is not precise until after one to two
hours of operation. For quick initial heating and to
shorten the initial adjustment, we recommend set-
ting the selected temperature higher than desired.
Once the temperature has been reached, the tem-
perature setting can be reset to the desired setpoint.

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Temperature setting scale
The scale for the temperature setting is found on the
cover of the room temperature controller and is used
for visual orientation when setting the temperature
(from min. 5 °C to max. 30 °C).
= approx. 5 °C
2 = approx. 10 °C
3 = approx. 15 °C
= approx. 20 °C
5 = approx. 25 °C
6 = approx. 30 °C

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Technical data
Temperature range: 5 °C to 30 °C
Rated voltage: 24 V AC
Rated heating current: 10 (4) A
Max. contact rating: approx. 240 W
Rated cooling current: 5 (2) A
Switching temperature differential: approx. 0.5 K
Night-time heating reductions: approx. 4 K
Conductor cross-section: 1 to 2.5 mm
solid conductor.

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Warranty
The warranty is provided in accordance with statu-
tory requirements via the specialist trade.
Please submit or send faulty devices postage paid
together with an error description to your responsi-
ble salesperson (specialist trade/installation com-
pany/electrical specialist trade).
They will forward the devices to the
Gira Service Center.

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Gira
Giersiepen GmbH & Co. KG
Elektro-Installations-
Systeme
Postfach 1220
42461 Radevormwald
Deutschland
Tel [phone] / 602 - 0
Fax [phone] / 602 - 191
www.gira.de
[email protected]e
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