domat UC095 03/2017 Subject to technical changes. 1
UC095
Room unit for VAV controller
FC015
Summary
The UC095 room unit is a communicative human-machine interface for VAV unit
controller FC015.
Application
▪ VAV systems – measurement and control of room temperature and CO
2
concentration
Function
The unit reads room temperature and CO2 concetration in the room air, temperature
correction / setpoint by a knob, and required operation mode which is set by a short
push or in the menu. Data is transmitted to the room controller. The main controller,
FC015, may send to the unit other data (heating / cooling mode, fan stage, day / night
/ standby mode etc.) which are displayed on the LCD display.
Connect the room unit to FC015 over a 4 core cable, the most suitable types are JY(St)Y
or LAM 2x2x0.8. Use the same type which powers the FC015 controller as if the room
unit power is taken from the FC015 terminals, the cores in a terminal should be of the
same cross-section.
Technical data
Power supply
24 V st +/- 10%
Consumption
600 mVA
Measuring range
0 ÷ 50 °C
Protection
IP20
Sensor accuracy
+/- 1,5 K (with software correction)
Setpoint
as configured, +/- 10 to +/- 1 K
CO2 measuring range
0 ... 2000 ppm
CO2 setpoint
800 ppm by default
CO2 measuring method
NDIR (Non-dispersive Infra Red)
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CO2 measuring accuracy
30 ppm 5 % from the measured value,
software correction possible
Response time of the CO2 sensor (90 %)
60 s
Communication
RS485 - Modbus RTU, galvanically separated up to
3 kV
Display
LCD 60 x 60 mm
Terminals
screw terminals for wires 0,14 – 1,5 mm2
Cover
ABS, RAL9010, other colours
Weight
0,13 kg
Dimensions
see below
Terminals
1
2
3
4
5
6
7
1: K- communication, RS485 2: K+ communication, RS485 +
3: NC not connected
4: NC not connected
5: GND technical earth (TE)
6: NC power – common point
7: NC power
Dimensions
All dimensions in mm.
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Installation
Units are intended for operating in a normal and chemically non-aggressive
environment. They do not need any servicing or maintenance. Install them in a vertical
position at places where they can be operated easily and measure correct values of
temperature and CO2, i.e. in the height of about 150 cm, with no direct sunlight or other
heat / cool source (AHU outlets, refridgerator, electrical appliances). The device
consists of two parts: bottom with screw terminal block and cover containing PCB,
display, and the knob. The bottom part is fixed by 2 or 4 screws to any flat surface or a
flush-mounting box Ø 50 mm. At the back of the bottom there is an aperture for cabling.
The bottom should be installed and cabling connected first, and the upper part inserted
after the construction works have been finished to prevent damage to the unit.
Seal the conduits to avoid influencing the sensor by draught. Use insulating pad when
installing the sensor on cold walls. Avoid sensor exposition to sunlight or other heat
sources.
Opening the
cover
When removing the display part, proceed as follows:
- press gently the side parts of the unit and pull the right of the display part by several
milimeters
- pull the left of the display part
- pull the display part and remove it from the bottom.
Do not bend the display part too much, the connector pins could be damaged. The locks
are only at the sides of the display part, not at the top nor bottom.
RoHS notice
The device contains a non-rechargeable battery which backups the real-time clock and
part of the memory. After the device is not operable, please return it to the
manufacturer or dispose of it in compliance with local regulations.
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Changes in
versions
08/2016 — Changed format.
03/2017 — Added picture and description of the installation and link on the datasheet
with other colours.
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