Rexel RTU 300 AT Installationsanleitung Seite 3

RTU 300 AT LCD Hourly Programmable Thermostat
A. Installation, Mounting:
Caution: Turn off RTU 300 AT and the electronic devices
(e.g. heater, cooler) which will be connected before
installation start. It is highly recommended that the
installation procedure is processed by trained personnel.
1. Installation Location:
Choose an indoor location that provides good temperature
detection. Prevent direct exposure to sunlight; at low air
circulation, near heat/cool generating sources, or suffer
from great temperature changes (e.g. near door).
2. Wiring:
There are 3 wiring terminals at the top-right corner at the
back of RTU 300 AT, labeled as "L"(Live), "H"(Heater) and
"C" (Cooler). "H" and "C" are input to heater and cooler.
Leaves unused hole blank.
DO NOT CHANGE OR EXCHANGE ANY WIRINGS.
3. Mounting:
Using the accessory screws and wall anchors provided,
mount the thermostat with the key-hole at the back. The
thermostat should be mounted on the wall as shown in
Figure 1.
Figure 1
Dimension in mm
4. Slide Switch at Back and HEAT/COOL Slide Switch:
In Winter put the HEAT/COOL slide switch at HEAT, while
in summer set it at COOL. The slide switch at Back set the
delay time of the heater/cooler from OFF to ON:
HEAT COOL
NO DELAY 10sec 5min
DELAY 5min 5min
Note: When COOL is set, the delay time to ON is fixed at 5 min.
B. Start/Reset:
1. After wiring, mounting and switch off all connected
devices, place 2 pieces of new AA 1.5V alkaline
batteries according to the polarities marked. LCD
display will be switched on.
2. Press 'RST' to reset. It will be ready for controlling the
heater/ cooler.
3. Switch ON the heater/cooler. The heater/cooler will
remain at OFF until RTU 300 AT activates the output
ON with rotating.
C. Normal Time Mode:
1. Temperature detection starts and LCD displays the
room temperature.
2. If Battery is LOW; C, P, & Colon will be flashing, the
recent batteries must be replaced with new batteries.
3. Defrost 'df' is displayed for a temperature control at 5 ˚C
with ON @ Heat & OFF @ Cool when room temperature
is below 5 ˚C.
4. Below 0 ˚C, L will display with ON @ Heat & OFF @
Cool.
5. Above 39.5 ˚C, H will display with OFF @ Heat & ON @
Cool
D. Normal Time Setting Mode:
1. Press < >, Day of Week (1-7) will flash, press
< >/< > to make Day of Week changes.
2. Press < >, Hour will flash, press < >/<
Hour changes.
3. Press < >, Minute will flash, press < >/<
make Minute changes.
4. Press < > jump back to Normal Time Mode, or auto
return after 10 seconds.
5. Jumper selection for 12/24 HR display can be selected
at the PCB during installation, factory pre-set at 24
HR.
> to make
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