1
E 121 - DTU 614
C2 Eng.
04.07.01
We reserve the right to make changes without notice
COSTER
TEMPERATURE AND HUMIDITY CONTROLLER
FOR ONE-BATTERY AIR HANDLING UNIT
DTU 614
C2 Eng.
• Temperature and relative humidity control in air handling units
• 24-hour, 7-day, and yearly period programming
• Communication systems:
– telemanagement C-Bus
• 24 V power supply; DIN rail mounting
1. APPLICATION
DTU 614 is designed for temperature and humidity control in air handling units composed of:
• 1 hot/chilled water or vapor battery with 3-wire modulating control
or
electric batteries with 1-,2-, or 3-stage On-Off control
or
direct expansion batteries with 1- or 2-stage On-Off control
• 1 adiabatic humidifying unit with On-off control
or
vapor-operated, with 0...10 V– control (alternative to air damper control)
• 1 air mixing unit with 0...10 V– air damper actuators
or 1 heat recuperator with 0...10 V– or On-Off control (CSV 304 converter).
The equipment can be included in a Telemanagement system through the C-Bus connection.
2. FEATURES
The main features of DTU 614 are as follows:
• One 3-wire modulating output, or 2-stage On-off (two equal loads) or 3-stage (two unequal loads) outputs,
configurable for:
– room temperature control (heating or cooling) with summer external compensation if desired, minimum
and maximum flow limits to prevent cold drafts, hot air stratification and condensing in the air ducts.
– flow temperature control (heating or cooling) with winter and summer compensation if desired
– pre-heating temperature control at variable values according to room temperature and humidity
– battery antifreeze temperature control
– One On-off output for winter adiabatic humidifying unit control
• One 0...10 V– progressive output, configurable for:
– air mixing control based on temperature comparison, with minimum external air limit
– external air control for room dehumidification with compensation of dew temperature on glass windows and
with minimum external air limit
– heat recuperator On-Off control according to room-external temperature comparison
– vapor-operated humidifier setting by means of a 0...10 V– control
• One 3-wire On-Off output for manual or automatic seasonal switching.
• Two On-Off outputs for fan and pump control according to time setting in use
• Winter battery frostprotection temperature control
• Time setting including 25 24-hour programs, 5 7-day programs, and 25 yearly period programs
• Alarms for detector short and open circuits and for system and equipment malfunction.
C BUS
3. ACCESSORIES
No.
Description
Type
Application Range
Sensing element t
°
Code Data sheet
1
Duct flow air temperature detector
STA 010
0…60
°
C
NTC 10 k
Ω
B1
–
1
Duct outside air temperature detector
STA 001
–30…+40
°
C
NTC 1 k
Ω
B2
–
or
wall outside air temperature detector
SAE 001
–30…+40
°
C
NTC 1 k
Ω
B2
–
1
Duct extract air temperature detector
STA 010
0…40
°
C
NTC 10 k
Ω
B3
–
or
room air temperature detector
SAB 010
0…40
°
C
NTC 10 k
Ω
B3
–
1
Duct pre-heating temperature detector
STA 010
0…40
°
C
NTC 10 k
Ω
B4
–
or
dew point temperature detector
STV 010
0…40
°
C
NTC 10 k
Ω
B4
–
1
Room relative humidity and temperature detector
SAU 012
0…40
°
C ; 20…80 %
NTC 10 k
Ω
B3-B6
–
or duct relative humidity detector
SUR 012
20…80 %
–
B6
–
or duct relative humidity detector (swimming pools)
SUR 051
10…90 %
–
B6
–
1
Battery frostprotection temperature detector – flush
SAF 010
0…40
°
C
NTC 10 k
Ω
B7
–
or
immersed
SIH 010
0…40
°
C
NTC 10 k
Ω
B7
–
1
0…10 V – to 2-stage On-Off Duct converter
CSV 304
–
–
U1
–
1
Temperature set-point adjuster
CDB 100
±
5
°
C
–
Rt
°
–
1
Relative humidity set-point adjuster
CDB 200
±
5 %H
–
RH
–
1
Outside air minimum distance positioner
PCS 04
–
–
Rs
–
E 121
04.07.01
