Coster DTU 644 User manual

1
We reserve the right to make changes without notice
COSTER
TEMPERATUREAND HUMIDITY CONTROLLER
FOR TWO-BATTERYAIR HANDLING UNIT
DTU 644 Eng. C2
• Temperature and relative humidity control in air handling units
• Communication systems:
– telemanagement C-Bus
• Power supply 24 V~ , DIN rail mounting
1. APPLICATION
DTU 644 is designed for temperature and humidity control in air handling units composed of:
• 2 hot/chilled water or vapor batteries 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 3-wire modulating control, or 1- or 2-stage On-Off co
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. FEATURESThe main features of DTU 644 are as follows:
• Three 3-wire modulating outputs 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
–roomrelativehumiditycontrol–humidifying(flowlimits,alternativetoenthalpiccomparison,ifdesired)and
dehumidifying
• 1 0...10 V– progressive output, configurable for:
– air mixing control based on temperature or enthalpic comparison, with minimum external air limit
–externalaircontrolforroomdehumidificationwith compensation ofdewtemperatureonglass 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
• Manual or automatic controller function seasonal switching.
• Remote-controlled temperature and humidity setting adjustment
• Alarms for short and open detector circuits and for system and equipment malfunction.
C BUS
3. ACCESSORIES
No. Description Type Application range Sensing Code Data
element t°sheet
1 Duct flow air temperature detector STA 010 0…60 °C NTC 10 kΩB1 –
1 Duct outside air temperature detector STA 001 –30…+40 °C NTC 1 kΩB2 –
or wall outside air temperature detector SAE 001 –30…+40 °C NTC 1 kΩB2 –
1 Duct extract air temperature detector STA 010 0…40 °C NTC 10 kΩB3 –
or or room air temperature detector SAB 010 0…40 °C NTC 10 kΩB3 –
1 Duct pre-heating temperature detector STA 010 0…40 °C NTC 10 kΩB4 –
or duct relative humidity detector STV 010 0…40 °C NTC 10 kΩB4 –
1 Room relative humidity and temperature detector SAU 012 0…40 °C ; 20…80 % NTC 10 kΩB3-B6 –
or duct relative humidity detector SUR 012 20…80 % – B6-B7 –
or duct relative humidity detector (swimming pools) SUR 051 10…90 % – B6-B7 –
1 0...10 V– to 2-stage On-Off Duct converter CSV 304 ––U1–
1 Modulating to 0...10 V– converter CSC 304 ––U2–
1 Temperature set-point adjuster CDB 100 ––Rt°–
1 Relative humidity set-point adjuster CDB 200 ––RH–
1 Outside air minimum distance positioner PCS 04 ––Rs–
E 122
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E 122 - DTU 644 C2 Eng. 05.05.01
We reserve the right to make changes without notice
COSTER
AIR TREATMENT
CONTROLLER
DTU 644
COSTER
OUTPUT Y1
+
–
OUTPUT Ys
ESC
12
OUTPUT Y2
12
OUTPUT Y3
12
ALARM
!
°c
105
115
35
50.5 21
45
4.TECHNICAL DATA (default values in bold print)
• Electrical data
Power supply 24 V ~ ±10%
Frequency 50 … 60 Hz
Consumption 5VA
Protection IP40
Radiodisturbances VDE0875/0871
Vibration test with 2g (DIN 40 046)
Voltage-free output contacts:
maximum switching voltage 250 V ~
maximum switching current 5 (1) A
Construction standards CEI
Data storage period 5 years
Software Class A
• Mechanical data
Case DIN 6E module
Mounting on DIN 35 rail
Materials:
base NYLON
cover ABS
Room temperature:
operation 0 … 45 °C
storage – 25 … + 60 °C
Room Humidity Class F DIN 40040
Dimensions 105 x 115 x 71.5
Weight 0.6 kg
• Adjustment range
Heating (or cooling) temperatures:
desired room temp. (B3 o B1+B3) 0…20 (25)…40 °C
desired flow temp. (B1) 0…20 (25)…60 °C
min. flow limit (B1+B3) 1…18 (8)…60 °C
max. flow limit (B1+B3) 1…50 (25)…60 °C
room heating flow limit (B1+B3) 0…40 °C
room cooling flow limit (B1+B3) 0…40 °C
outside default temp. (B1+B2) –30…–10 (35)…40 °C
flow default temp. (B1+B2) 1…50 (10)…60 °C
summer compensation Te–Ta (B2+B3) 0…6…20 °C
Preheating or dewpoint temperature (B4) :
min. limit 0…10…40 °C
adjustment – 9.5…0…+9.5 °C
Heat pump min. outside temp. –30…0…40°C
Temp. proportional band (base value):
Heating (room) (B3 o B1+B3) ±1…±2…±40 °C
Heating (flow) (B1) ±1…±10…±40 °C
Various temp. proportional band multipliers:
Heating flow (B1+B3) Pb room x 0.5…5…20
Cooling temperatures Pb heat x 0.5…20
Preheating (B4) Pb heat disch x 0.5…1…20
5. OVERALL DIMENSIONS 6. FACIA
1 - Alphanumeric display
2 - + and – operating keys
3 - ←and →operating keys
4 - Y1 output LED
5 - Y2 output LED
1
2
3
3
4
5
1 – Electronic component protection cover
2 – Support base with transformer, relays and terminal boards
3 – Screws for securing cover to base
4 – DIN rail securing elements
5 – DIN rail release lever
Dewpoint (B4) Pb room heat x 0.5…1…20
Air dampers (B2+B3) Pb room heat x 0.5…1…20
Aux. heating (B3) Pb room heat x 0.5…1…20
Aux. heating (B1 or B1+B3) Pb flow disch x 0.5…1…20
Temp. integral time 0…10…255 min.
Room or flow relative humidity (B6) :
humidification 0…50…99 %
dehumidification 0…60…99 %
Humidity proportional band ±0.5…±6…±40 %
Humidity integral time 0…10…255 min.
Flow humidity limits:
min. 1…99 %
max. 1…99 %
influence 1…5…30 %
Y1, Y2, Y3 output control : –modulating
– 2 stages
– 3 stages
Ys output control 0…10V–
Valve stroke time (modulating) 30…120…630 s
Season switching: – manual (display)
– external control
– auto based on outside temp.
– auto based on room temp.
Season switching outside temperatures:
winter 0…20…40 °C
summer 0…25…40 °C
Season switching delay based on outside temp.:
winter 1…24…60 hrs
summer 1…4…60 hrs
• Alarm adjustments
Telemanagement (PC-controlled adjustments)
Alarm call attempts 1…5…255
Alarm call interval 2…10…255 m
Alarms (PC-controlled adjustments) :
Disch.temp. diff. threshold(B1) 1…5…99 °C
Disch.temp. diff. threshold 2…30…255 min.
Room temp. diff. threshold(B3) 0.5…1…30 °C
Room temp. diff. delay 2…30…255 min.
Preheat/dew temp. diff. threshold (B4) 1…5…99 °C
Preheat/dew diff. delay (B4) 2…5…255 min.
Humidity diff. threshold(B6) 0.5…10…90 %
Humidity diff. delay 2…30…255 min.
Warning:
In case of static, the equipment’s output controls may change
settings; original settings will be subsequently restored
automatically.
1 2
4 5 6 37 8 9
6 - Y3 output LED
7 - Ys output LED
8 - Measurement alarm LED
9-MicroprocessormalfunctionLED

3
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COSTER
Always On (as supplied)
Possible Season switching (M2.2) modes:
No ss;Winter;Summer;BasedonOutsideTemp.;
Based on Room Temp.; Based on Seasons
SsWin = On –Winter
SsSum = On –Summer
Season switching (M2.2) must be:
through ss control
7. WIRING DIAGRAMS
B1– Flow air temp. detector
B2– Outside temp. detector
B3 – Room or extract air temp. detector (0...40 °C)
B4– Preheating or dewpoint temp. detector
B6– Room humidity or extract air or flow air detector
B7– Outside humidity (enthalpy) or flow limit Detector
cs – Season switch (eliminate D-E1 link)
Win = winter Sum = summer
Y1-2-3– 3-wire modulating controls
Ys– Air dampers or recuperator or vapor humidifier
0...10V–control
Rt°– Temp. set-point adjuster
RH– Humidity set-point adjuster
Rs– Minimum outside air remote positioner
7.6Use of D-E1-E2 Outputs – Examples
ss– Control through manual or centralized season switch or through
DTU 614-type controller. c1 – on-off contact through timeswitch or through manual control
or through fan relay
D
E1 E2
1234
LY1.e N
1º 2º
LY2.e N
1º 2º
11 12 13 14
1 2 3 4
1º 2º
Y1.c
11 12 13 14
1º 2º
Y2.c
5 6 7
Y3.a
NL
Y.. : MODULATI NG
Run t ime : xxx s
M2.6.8.10
7.13-Wire Modulating Valve Control
5 6 7 8 9 10
1º 2º
N L
Y3.e
7.2Electric Battery or Electric Humidifier Control
Y.. : 2 STAGES
M2.6.8.10
7.4Adiabatic Humidifier Of-Off Control
2 equal loads
Y.. : 3 STAGES
M2.6.8.10
Y..: 2 STAGES
M2.6.8.10
7.3Direct Expansion Battery Control
Y3 : MODULATI NG
Run t ime : xxxs
M2.10
Y3: 2 STAGES
M2.10
2 unequal loads
Y1-2.c– Direct expansion batteries (refrigerators
or heat pumps)
Y1-2.e– Electric batteries
Y3.a– Adiabatic humidifier (pump or electro-
magnetic valve)
Y3.e– Electric battery or electric vapor humidifier
Y3.p - Ys.p– 0…10 V– control vapor humidifier
U2– Modulating signal converter to 0…10 V–
5678910
24 V–
Y3.p
24 V–
024
0
Y
U2
1112 13
024 0Y
Y
7.5Vapor Humidifier Control (0…10 V–)
0
24 V
~
24
24 0 024
Ys
Ys.p
Y0
Ys-Cont rol :
HUMI D I F I CAT I ON
M2.12
Always On (as supplied)
Possible Season switching (M2.2) modes:
No ss;Winter;Summer;BasedonOutsideTemp.;
Based on Room Temp.; Based on Seasons
Ss Win and c1 closed = On - Winter;
Ss Sum and c1 open = On – Summer
Season switching (M2.2) must be:
through ss control
Rs
132
Y1
1
Co 3
Cl
2
Op
B2
B1
0
24 V
~
24
M
B5
B4MB3B2MB1
11 12 13 14
DTU 644
B6
5 6 7 24 0 0 8 9 10
Rt°
B3
Y2
B7 G
RH
24
1234
0
D
E2
C BUS
B8 E1 C
Ys 0C
B6
H
312
1
Co 3
Cl
2
Op
Y3
1
Co 3
Cl
2
Op
Ys
T
T T
24
1Y1
3
0
2
B4
T
B7
H
312
cs
0
Win Sum
D
E1 E2
Ss
Win Sum
Win
D
E1 E2
cs
Sum
c1
c1
D
E1 E2

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We reserve the right to make changes without notice
COSTER
9. WHERE TO PLACE DEVICES
9.1Controller The controller
should be placed in a dry environment, in compliance with acceptable environment conditions as
described under “Technical Data”. If located in environments classified as “hazardous” it should be installed within
switchboards built in accordance with applicable regulations depending on hazard class. The controller may be
installed on the board’s bottom on a DIN rail, or in DIN modular boards
9.2 Flow temperature detector B1
B1 must be installed downstream with respect to the flow fan.
9.3Outside temperature detector B2
STA001 :Itmaybeusedinsystemswithconstantoutsideairinflow.Itmustbeinstalledupstreamwithrespecttothe
outside air dampers near the air intake.
SAE 001 : It should be used in systems where outside air flow is not constant. It must be installed outside the
building, on the north or northwest side, at a height of at least 3 m. above the ground, protected from sunshine and
away from windows, doors, chimneys or other direct thermal interference.
9.4Room temperature or extract air detector B3 or room temperature and humidity detector B3 + B6
SAB 010 or SAU 012 environment : It must be installed in a spot that reflects the average temperature and/or
humidityofasignificantroom(e.g.livingroom)ataheightof1.5...1.6m.abovethefloor,onaninsidewallawayfrom
windows, doors and sources of heat (no alcoves, scaffolds or hangings).
STA 010 extract air: It should be installed upstream with respect to the extract fan.
9.5Duct mounting humidity detector B6
Extract air: It must be installed upstream with respect to the extract fan.
Discharge air: It should be installed downstream with respect to the discharge fan.
9.6Preheating or swimming pool dew point temperature detector B4
Preheating: Itmust be installeddownstreamwithrespectto the humidifyingunit,preferablydownstreamof the drop
separator.
Dew point: It should be installed next to windows facing north.
9.7Outside duct mounting or flow limit humidity detector B7
Outside : It must be installed upstream with respect to outside air dampers, close to the air intake.
Flow limit: It must be installed downstream with respect to the discharge fan.
8. WIRING Proceed as follows:
•Separate the base from the cover
• Install the base onto the DIN rail and check that it is properly anchored by the securing elements (5.4)
• Perform the wiring connections as illustrated in the diagram, in compliance with applicable regulations and using:
– 1.5 sq. mm2cables of supply voltage and relay control outputs
– 1 sq. mm2cables for the detectors and remote control
– 1 sq. mm2 cables for the C-Bus. See sheet T 021 for length limits
• Apply power (24 V~) and make sure voltage properly reaches terminals 24 and 0.
• Remove power, re-install the cover onto the base/terminal board, and fasten it with the 4 screws included in the
package (5.3).
It is recommended not to insert more than two cables in a single controller terminal. Use external terminals if necessary.

5
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COSTER
10.3Telemanagement Address
In telemanagement mode, controllers must have an address sequence number to be identified by
the central computer or by the local PC(s),.
Additionally, controllers can be subdivided into groups.
Note When in non-telemanagement mode, the address should be saved (–).
To cancel values, press + and – keys simultaneously.
10.4Sending Alarms
• Sending alarms : NO= No alarms are sent
YES = Alarms are sent to the central computer and are signaled by
the word “ALARM” appearing on the display
• Teleman Passw: : NO = Password disabled
YES = Password enabled
M2.14
Addr ess : –
Group : –
M2.13
SendingAlarms:NO
PassWTeleman :NO
10. COMMUNICATION
10.1C-Bus Telemanagement Communication (for more detailed information please see Technical Sheet T 021)
Through the C-Bus output, DTU 644 can be managed remotely (two-way data communication) by
means of one or more local PC(s) and/or a remote central computer via telephone network.
From the PC(s) it is possible to view and/or change the following:
– data and value settings on the controller display pages, and configuration data dedicated to
telemanagement only (see “Technical Data”)
– system component’s operating status (pumps, accessory in general)
– acquire system-generated alarms
– view detector readings (temperatures: outside, room, flow, etc.)
10.2C-Bus wiring
C
0C C 0C C 0C
Controller
with Address
No. 1
Controller
with Address
No. 2
Controller
with Address
No. ...
to modem and/or
convertor for
local PC

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We reserve the right to make changes without notice
COSTER
11. TEMPERATURE AND HUMIDITY CONTROL – EXAMPLES
11.1Room temperature and humidity control
B2– Flow temp. detector
B3– Room or extract temp. detector
B6– Room or extract humidity detector
Rt°– Temperature set point adjuster (optional)
RH– Humidity set point adjuster (optional)
B1– Flow temp. detector
B2– Outside temp. detector (for compensation only)
B3– Room or extract temperature detector
B6– Room or extract humidity detector
B7– Flowhumiditydetector(alternativetooutsidehumiditydetector)
Rt°– Temperature set point adjuster (optional)
RH– Humidity set point adjuster (optional)
B1– Flow temp. detector
B2– Outsidetemperaturedetector(forcompensationonly)
B6– Room or extract humidity detector
Rt°– Temperature set point adjuster (optional)
RH– Humidity set point adjuster (optional)
11.2Room temperature and humidity control with flow temperature and humidity limits
11.3Flow temperature and room or flow humidity control
Detector layout
– 2 3– 5 6– 8
M2.1
Detector layout
1 2 3– 5 67 8
M2.1
Detector layout
1 2 –– 5 6– 8
M2.1
B6B3
B2
DTU 644
T
HT
RHRt°
+
+
+
T H
B6B3
B2
M
B5
B4MB3B2MB1
DTU 644
B6
Rt°
B3
B7 G
RH
B8
B6
H
312
T T
B2
DTU 644
T
B1
T H
B6
+
+
+
RHRt°
B6
HT H
B6
B2
B1
M
B5
B4MB3B2MB1
DTU 644
B6
Rt°
B7 G
RH
B8
B6
H
312
T
T
B6B3
B2
DTU 644
T
B1
T
HT
+
+
+
RHRt°
T H
B6B3
T H
B6
B7
H
B2
B1
M
B5
B4MB3B2MB1
DTU 644
B6
Rt°
B3
B7 G
RH
B8
T
T T
B6
H
312
B7
H
312

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We reserve the right to make changes without notice
COSTER
B3
B2
DTU 644
T
T
M
Ys
U1
+
+
+
B2
0
24 V
~
24
M
B5
B4MB3B2MB1
DTU 644
B6
24 0 0
B3
B7 G
24
D
E2B8 E1 C
Ys 0C
U1
T T
24
1Y1
3
0
2
12. USE OF YSOUTPUT– EXAMPLES
12.1Enthalpic comparison air damper optimization
12.2Temperature comparison air damper optimization
12.3Heat recuperator On-Off control
B2– Outside temp. detector
B3– Room or extract temp. detector
B6– Room or extract humidity detector
B7– Outside humidity detector (alternative to flow)
Ys– Progressive air damper control
Rs– Outside air min. distance positioner (optional)
B2– Outside temp. detector
B3– Room or extract temp. detector
Ys– Progressive air damper control
Rs– Outside air min. distance positioner (optional)
B2– Outside temp. detector
B3– Room or extract temp. detector
Ys– Recuperator
U1– 0…10 V– into On-Off signal converter
Detector layout
–23––67–
M2.1
De tec tor l ayout
–23–––––
M2.1
De tec tor l ayout
–23–––––
M2.1
Ys - Con t r o l :
DAMP. TEMPERATURE
M2.12
Ys - Con t r o l :
RECUPERATOR
M2.12
12.4– Outside air control for room dehumidification (swimming pools) with dew point control (optional)
– 1 Heating modulating battery
Detector layout
1–34 5 6– 8
M2.1
Y1 : MODULATI NG
Run t ime : xxx s
M2.6
Y1: HEATING
M2.7
Ys -Con t r ol :
DEHUMIDI F ICAT ION
M2.12
B1– Flow temp. detector
B3– Room or extract temp. detector
B4– Dew point temp. detector (optional)
B6– Room or extract humidity detector
Rt°– Temperature set point adjuster (optional)
RH– Humidity set point adjuster (optional)
Rs– Outside air min. distance positioner (optional)
Y1– Heating modulating control
Ys– Progressiveairdampercontrol(dehumidification)
Use de t ec tor B4
DEW POI NT
M2.4
B3
B2
Ys
DTU 644
T
T
Rs
+
+
+
B7
H
B6
H
Rs
132
B2
0
24 V
~
24
M
B5
B4MB3B2MB1
DTU 644
B6
24 0 0
B3
B7 G
24
D
E2B8 E1 C
Ys 0C
B6
H
312
Ys
T T
24
1Y1
3
0
2
B7
H
312
B3
B2
Ys
DTU 644
T
T
Rs
+
+
+
Rs
132
B2
0
24 V
~
24
M
B5
B4MB3B2MB1
DTU 644
B6
24 0 0
B3
B7 G
24
D
E2B8 E1 C
Ys 0C
Ys
T T
24
1Y1
3
0
2
Ys - Con t r o l :
DAMP. ENTHALPY
M2.12
DTU 644
Ys
+
+
+
B6
H
B7
H
RH
12.5– Vapor humidifying unit control 0…10 V–
0
24 V
~
24
M
B5
B4MB3B2MB1
DTU 644
B6
24 0 0
B7 G
24
D
E2B8 E1 C
Ys 0C
Ys
Y
0
RH
B6
H
312
B7
H
312
B6– Room or extract humidity detector
B7– Flow humidity detector (optional)
RH– Humidity set point adjuster (optional)
Ys– Progressive humidifier control
De tec tor l ayout
–––––6 78
M2.1
Ys-Cont ro l :
HUMI DI F ICAT ION
M2.12
Use de t ec t or B7
FLOW HUM . LIMIT
M2.5
Use de t ec t or B7
OUTSIDE HUMIDITY
M2.5
Y1
Ys RH B4
Rs
Rt°
T
B6B3
DTU 644
B1
T
HT
+
Rs
132
Y1
1
Co 3
Cl
2
Op
B1
0
24 V
~
24
M
B5
B4MB3B2MB1
11 12 13 14
DTU 644
B6
5 6 7 24 0 0 8 9 10
Rt°
B3
B7 G
RH
24
1234
D
E2B8 E1 C
Ys 0C
B6
H
312
Ys
T
T
24
1
Y1
30
2
B4
T

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We reserve the right to make changes without notice
COSTER
13. USE OF Y1, Y2, Y3 OUTPUT– EXAMPLES
13.2– 1 Winter preheating, summer cooling/dehumidifying modulating battery
– 1 Post-heating modulating battery
– 1 Humidifying On-Off unit
B1– Flow temp. detector
B2– Outside temp. detector (for compensation)
B3– Room or extract temp. detector
B4– Preheating temperature detector
B6– Room or extract humidity detector
Rt°– Temperature set point adjuster (optional)
RH– Humidity set point adjuster (optional)
Y1– Preheating modulating control
Y2– Post-heating modulating control
Y3– Humidifier On-Off control
Detectors Layout
1 2 34 5 6– 8
M2.1
Y1 : MODULATING
Run t ime : xxx s
M2.6
Y1 : PREHEAT I NG
M2.7
Y2: MODULATING
Run t ime : xxx s
M2.8
Y2:HEATING
M2.9
Y3: 2 STAGES
M2.10
Y3:HUMIDI F.
M2.11
Detectors Layout
1 2 34 5 6– 8
M2.1
Y1 : MODULATING
Run t ime : xxxs
M2.6
Y1 -Wi n : PREHEAT .
Y1 - Sum: COOL+DHU
M2.7
Y2: MODULATING
Run t ime : xxxs
M2.8
Y2-Win:HEAT ING
Y2-Sum:HEAT ING
M2.9
Y3: 2 STAGES
M2.10
Y3-Win:HUMIDIF.
Y3-Sum:OFF
M2.11
B1– Flow temperature detector
B2– Outside temp. detector (for compensation)
B3– Room or extract temp. detector
B4– Preheating temperature detector
B6– Room or extract humidity detector
Rt°– Temperature set point adjuster (optional)
RH– Humidity set point adjuster (optional)
Y1– Winterpreheatingsummercooling/dehumidifying
modulating control
Y2– Post-heating modulating control
Y3– Humidifier On-Off control
13.1– 1 Preheating modulating battery
– 1 Post-heating modulating battery
– 1 Humidifying On-Off unit
13.3– 1 Heating modulating battery
– 1 Cooling modulating battery
– 1 Humidifying On-Off unit
B1– Flow temp. detector
B2– Outside temp. detector (for compensation)
B3– Room or extract temp. detector
B6– Room or extract humidity detector
Rt°– Temperature set point adjuster (optional)
RH– Humidity set point adjuster (optional)
Y1– Heating modulating control
Y2– Cooling modulating control
Y3– Humidifier modulating control
Detectors Layout
1 2 3– 5 6– 8
M2.1
Y1 : MODULATING
Run t ime : xxxs
M2.6
Y1:HEAT ING
M2.7
Y2: MODULATING
Run t ime : xxxs
M2.8
Y2 : COOL I NG
M2.9
Y3: MODULATING
Run t ime : xxxs
M2.10
Y3:HUMIDI F.
M2.11
Use de t ec t o r B4
PREHEAT I NG
M2.4
Use de t ec t o r B4
PREHEAT I NG
M2.4
Output 8-9-10:
CONTROL
M2.3
Season Swi t ching
NO
M2.2
Season Swi t ching
XXXXXXXXX
M2.2
Season Swi t ching
NO
M2.2
Y3Y1 Y2
+
B4
T
+
B6B3
B2
DTU 644
T
B1
T
HT
RHRt°
Y3Y1 Y2
+
B4
T
+
–
B6B3
B2
DTU 644
T
B1
T
HT
RHRt°
Y3Y2Y1
–+
B6B3
B2
DTU 644
T
B1
T
HT
RHRt°
Y1
1
Co 3
Cl
2
Op
B2
B1
0
24 V
~
24
M
B5
B4MB3B2MB1
11 12 13 14
DTU 644
B6
5 6 7 24 0 0 8 9 10
Rt°
B3
Y2
B7 G
RH
24
1234
D
E2B8 E1 C
Ys 0C
B6
H
312
1
Co 3
Cl
2
Op
T
T T
B4
T
Y3
NL
Y1
1
Co 3
Cl
2
Op
B2
B1
0
24 V
~
24
M
B5
B4MB3B2MB1
11 12 13 14
DTU 644
B6
5 6 7 24 0 0 8 9 10
Rt°
B3
Y2
B7 G
RH
24
1234
D
E2B8 E1 C
Ys 0C
B6
H
312
1
Co 3
Cl
2
Op
T
T T
B4
T
Y3
NL
Y1
1
Co 3
Cl
2
Op
B2
B1
0
24 V
~
24
M
B5
B4MB3B2MB1
11 12 13 14
DTU 644
B6
5 6 7 24 0 0 8 9 10
Rt°
B3
Y2
B7 G
RH
24
1234
D
E2B8 E1 C
Ys 0C
B6
H
312
1
Co 3
Cl
2
Op
Y3
1
Co 3
Cl
2
Op
T
T T

9
We reserve the right to make changes without notice
COSTER
13.4– 1 Heating modulating battery
– 1 Cooling direct expansion On-Off battery
– 1 Humidifying On-Off unit
B1– Flow temp. detector
B2– Outside temp. detector (for compensation)
B3– Room or extract temp. detector
B6– Room or extract humidity detector
Rt°– Temperature set point adjuster (optional)
RH– Humidity set point adjuster (optional)
Y1– Heating modulating control
Y2– Cooling On-Off control
Y3– Humidifier On-Off control
Detector Layout
1 2 3– 5 6– 8
M2.1
Y1 : MODULATING
Run t ime :xxxs
M2.6
Y1:HEATING
M2.7
Y2: 2 STAGES
M2.8
Y2 : COOL I NG
M2.9
Y3 : 2 STAGES
M2.10
Y3:HUMIDI F.
M2.11
Season Swi tching
NO
M2.2
13.5– 1 Summer cooling/dehumidifying direct expansion On-Off battery
– 1 Heating On-Off battery
– 1 Humidifying On-Off unit
B1– Flow temp. detector
B2– Outside temp. detector (for compensation)
B3– Room or extract temp. detector
B6– Room or extract humidity detector
Rt°– Temperature set point adjuster (optional)
RH– Humidity set point adjuster (optional)
Y1– Summer cooling/dehumidifying On/Off control
Y2– Heating On-Off control
Y3– Humidifier On-Off control
Detector Layout
1 2 3– 5 6– 8
M2.1
Y1: 2 STAGES
M2.6
Y1-Win:OFF
Y1 - Sum: COOL+DHU
M2.7
Y2: 2 STAGES
M2.8
Y2-Win:HEATING
Y2-Sum:HEATING
M2.9
Y3 : 2 STAGES
M2.10
Y3-Win:HUMIDI F.
Y3-Sum:OFF
M2.11
Season Swi tching
XXXXXXXXX
M2.2
13.6– 1 Winter heating, summer cooling/dehumidifying modulating battery
– 1 Summer post-heating On-Off battery
– 1 Humidifying On-Off unit
B1– Flow temp. detector
B2– Outside temp. detector (for compensation)
B3– Room or extract temp. detector
B6– Room or extract humidity detector
Rt°– Temperature set point adjuster (optional)
RH– Humidity set point adjuster (optional)
Y1– Winter heating, summer cooling/dehumidifying
modulating control
Y2– Summer post-heating On-Off control
Y3– Humidifier On-Off control
Detector Layout
1 2 3– 5 6– 8
M2.1
Y1 : MODULATING
Run t ime :xxxs
M2.6
Y1-Win:HEAT ING
Y1 - Sum: COOL+DHU
M2.7
Y2: 2 STAGES
M2.8
Y2-Win:OFF
Y2-Sum:HEATING
M2.9
Y3 : 2 STAGES
M2.10
Y3-Win:HUMIDI F.
Y3-Sum:OFF
M2.11
Season Swi tching
XXXXXXXXX
M2.2
Y3
Y2
–
Y1
+
B6B3
B2
DTU 644
T
B1
T
HT
RHRt°
Y3
Y1
–
Y2
B6B3
B2
DTU 644
T
B1
T
HT
RHRt°
1º 2º
Y2
B2
B1
0
24 V
~
24
M
B5
B4MB3B2MB1
11 12 13 14
DTU 644
B6
5 6 7 24 0 0 8 9 10
Rt°
B3
B7 G
RH
24
1234
D
E2B8 E1 C
Ys 0C
B6
H
312
T
T T
Y3
NL
Y1
1º 2º
Y1 Y3 Y2
+
–
B6B3
B2
DTU 644
T
B1
T
HT
RHRt°
1º 2º
Y1
1
Co 3
Cl
2
Op
B2
B1
0
24 V
~
24
M
B5
B4MB3B2MB1
11 12 13 14
DTU 644
B6
5 6 7 24 0 0 8 9 10
Rt°
B3
Y2
B7 G
RH
24
1234
D
E2B8 E1 C
Ys 0C
B6
H
312
T
T T
Y3
NL
Y1
1
Co 3
Cl
2
Op
B2
B1
0
24 V
~
24
M
B5
B4MB3B2MB1
11 12 13 14
DTU 644
B6
5 6 7 24 0 0 8 9 10
Rt°
B3
Y2
B7 G
RH
24
1234
D
E2B8 E1 C
Ys 0C
B6
H
312
T
T T
1º 2º
Y3
NL

10
E 122 - DTU 644 C2 Eng. 05.05.01
We reserve the right to make changes without notice
COSTER
13.7– 1 Winter heating, summer cooling/dehumidifying modulating battery with heat pump season switching
– 1 Summer post-heating On-Off battery
– 1 Humidifying On-Off unit
B1– Flow temp. detector
B2– Outside temp. detector (for compensation)
B3– Room or extract temp. detector
B6– Room or extract humidity detector
Rt°– Temperature set point adjuster (optional)
RH– Humidity set point adjuster (optional)
Y1– Winter heating, summer cooling/dehumidifying
modulating control
Y2– Summer post-heating On-Off control
Y3– Humidifier On-Off control
Ycs– Heat pump season control
Detectors Layout
1 2 3– 5 6– 8
M2.1
Y1 : MODULATING
Run t ime : xxxs
M2.6
Y1-Win:HEATING
Y1 - Sum: COOL+DHU
M2.7
Y2: 2 STAGES
M2.8
Y2-Win:OFF
Y2-Sum:HEAT ING
M2.9
Y3-Win:HUMIDIF.
Y3-Sum:OFF
M2.11
Season Swi t ching
XXXXXXXXX
M2.2
Output 8-9-10:
CONTROL SEASON
M2.3
13.8– 1 Winter heating, summer cooling/dehumidifying direct expansion On/Off battery with heat pump season switching
– 1 Summer post-heating On-Off battery
– 1 Humidifying On-Off unit
B1– Flow temp. detector
B2– Outside temp. detector (for compensation)
B3– Room or extract temp. detector
B6– Room or extract humidity detector
Rt°– Temperature set point adjuster (optional)
RH– Humidity set point adjuster (optional)
Y1– Winter heating,summercooling/dehumidifying
On/Off control
Y2– Summer post-heating On-Off control
Y3– Humidifier On-Off control
Ycs– Heat pump season control
Detectors Layout
1 2 3– 5 6– 8
M2.1
Y1: 2 STAGES
M2.6
Y1-Win:HEATING
Y1 - Sum: COOL+DHU
M2.7
Y2: 2 STAGES
M2.8
Y2-Win:OFF
Y2-Sum:HEAT ING
M2.9
Y3-Win:HUMIDIF.
Y3-Sum:OFF
M2.11
Season Swi t ching
XXXXXXXXX
M2.2
Output 8-9-10:
CONTROL SEASON
M2.3
13.9– 1 Winter preheating, summer cooling/dehumidifying modulating battery
– 1
Winter post-heating On-Off battery
– 1 Summer post-heating On-Off battery
– 1 Humidifying On-Off unit
B1– Flow temp. detector
B2– Outside temp. detector (for compensation)
B3– Room or extract temp. detector
B4– Preheating temperature detector
Rt°– Temperature set point adjuster (optional)
Y1– Winter preheating,summercooling/dehumidifying
modulating control
Y2– Winter post-heating modulating control
Y3– Summer post-heating On/Off control
Detectors Layout
1 2 3– 5 6– 8
M2.1
Y1 : MODULATING
Run t ime : xxxs
M2.6
Y1 -Wi n : PREHEAT .
Y1 - Sum: COOL+DHU
M2.7
Y2: MODULATING
Run t ime : xxxs
M2.8
Y2-Win:HEATING
Y2-Sum:OFF
M2.9
Y3-Win:OFF
Y3-Sum:HEATING
M2.11
Season Swi t ching
XXXXXXXXX
M2.2
Output 8-9-10:
CONTROL
M2.3
Y3: 2 STAGES
M2.10
Use de t ec t o r B4
PREHEAT I NG
M2.4
Y1
Y3 Y2
Ycs
+
–
B6B3
B2
DTU 644
T
B1
T
HT
RHRt°
Y1
+
–
Y3 Y2
Ycs
B6B3
B2
DTU 644
T
B1
T
HT
RHRt°
Y1 Y2
+
B4
+
–
Y3
H
T
B3
B2
DTU 644
T
B1
T
T
Rt°
1º 2º
Y1
1
Co 3
Cl
2
Op
B2
B1
0
24 V
~
24
M
B5
B4MB3B2MB1
11 12 13 14
DTU 644
B6
5 6 7 24 0 0 8 9 10
Rt°
B3
Y2
B7 G
RH
24
1234
D
E2B8 E1 C
Ys 0C
B6
H
312
T
T T
Y3
NL
Ycs
CoWinSum
Ycs
Y1
2ºSt
1º 2º
B2
B1
0
24 V
~
24
M
B5
B4MB3B2MB1
11 12 13 14
DTU 644
B6
5 6 7 24 0 0 8 9 10
Rt°
B3
Y2
B7 G
RH
24
1234
D
E2B8 E1 C
Ys 0C
B6
H
312
T
T T
Y3
NL
Co
Win
Sum
1ºSt
Y1
1
Co 3
Cl
2
Op
B2
B1
0
24 V
~
24
M
B5
B4MB3B2MB1
11 12 13 14
DTU 644
B6
5 6 7 24 0 0 8 9 10
Rt°
B3
Y2
B7 G
24
1234
D
E2B8 E1 C
Ys 0C
1
Co 3
Cl
2
Op
Y3
T
T T
B4
T
1º 2º

11
We reserve the right to make changes without notice
COSTER
14. 3 OR 4 BATTERY SYSTEM CONTROL– EXAMPLES
14.1– 1 Winter preheating modulating battery
– 1 Summer cooling/dehumidifying modulating battery
– 1 Winter and summer post-heating modulating battery
– 1 Humidifying On-Off unit with humidostat
B1– Flow temp. detector
B2– Outside temp. detector (for compensation)
B3– Room or extract temp. detector
B4– Preheating temperature detector
B6– Room or extract humidity detector
F– Battery frost protection thermostat
Y– Winter preheating modulating control
Y1– Summer cooling/dehumidifying modulating control
Y2– Post-heating modulating control
Y3– Humidifier On-Off control
Rt°– Temperature set point adjuster (optional)
RH– Dehumidification set point adjuster (optional)
Detector Layout
1 2 3– 5 6– 8
M2.1
Y1 : MODULATING
Run t ime :xxxs
M2.6
Y1-Win:OFF
Y1 - Sum: COOL+DHU
M2.7
Y2 : MODULATING
Run t ime :xxxs
M2.8
Y2-Win:HEATING
Y2-Sum:HEATING
M2.9
Y3-Win:HUMIDIF.
Y3-Sum:OFF
M2.11
Season Swi t ch ing
FR CONTROL ss
M2.2
Ou t pu t 8 - 9 - 10 :
CONTROL
M2.3
14.2– 1 Winter preheating modulating battery
– 1 Summer cooling/dehumidifying modulating battery
– 1 Winter and summer post-heating modulating battery
– 1 Humidifying On-Off unit
B1– Flow temp. detector
B2– Outside temp. detector (for compensation)
B3– Room or extract temp. detector
B4– Preheating temperature detector
B6– Room or extract humidity detector
F– Battery frost protection thermostat
Y1– Winter preheating modulating control
Y2– Summer cooling/dehumidifying modulating control
Y3– Post-heating modulating control
Rt°– Temperature set point adjuster (optional)
RH– Dehumidification set point adjuster (optional)
Detector Layout
1 2 34 5 6– 8
M2.1
Y1 : MODULATING
Run t ime :xxxs
M2.6
Y1 -Wi n : PREHEAT .
Y1-Sum:OFF
M2.7
Y2 : MODULATING
Run t ime :xxxs
M2.8
Y2-Win:OFF
Y2 - Sum: COOL+DHU
M2.9
Y3-Win:HEATING
Y3-Sum:HEATING
M2.11
Season Swi t ch ing
FR CONTROL ss
M2.2
Ou t pu t 8 - 9 - 10 :
CONTROL
M2.3
Y3 : MODULATING
Run t ime :xxxs
M2.10
H T
TT
T
➚
➚
B6
B1
B2
YY1
B4
Y3
Rt°RH
F
B3
Y2
+ +–
DTU 644
DTF 314
T
H T
TT
T
➚
➚
B6
B1
B2
Y1 Y2
B4
Mu
Mv
Rt°RH
B7
B3
Y3
T
+ +–
DTU 644
DTU 614
Y1
1
Co 3
Cl
2
Op
B2
B1
M
B5
B4MB3B2MB1
11 12 13 14
DTU 644
B6
5 6 7 24 0 0 8 9 10
Rt°
B3
Y2
B7 G
24
1234
D
E2B8 E1 C
Ys 0C
B6
H
312
1
Co 3
Cl
2
Op
T
T T
0
24 V
~
24
Y3
1
Co 3
Cl
2
Op
cs
0
Win Sum
B4
T
RH
F
Y1
1
Co 3
Cl
2
Op
B2
B1
M
B5
B4MB3B2MB1
11 12 13 14
DTU 644
B6
5 6 7 24 0 0 8 9 10
Rt°
B3
Y2
B7 G
24
1234
D
E2B8 E1 C
Ys 0C
B6
H
312
1
Co 3
Cl
2
Op
T
T T
0
24 V
~
24
MB1
DTF 314
1 2 3 4
B4
F1
B3 F2B2
0
24 V
~
24
Y
1
Co 3
Cl
2
Op
24 0
Y3
NL
T
cs
0
Win Sum
RH
0C C
F

12
E 122 - DTU 644 C2 Eng. 05.05.01
We reserve the right to make changes without notice
COSTER
14.4– 1 Winter preheating modulating battery with frost protection control
– 1 Summer cooling/dehumidifying modulating battery
– 1 Winter post-heating modulating battery
– 1 Summer post-heating On-Off battery
– 1 Humidifying On-Off unit
B1– Flow temp. detector
B2– Outside temp. detector (for compensation)
B3– Room or extract temp. detector
B4– Preheating temperature detector
B6– Room or extract humidity detector
B7– Battery frost protection detector
Mu– Humidifier On-Off control
Mv– Fan On-Off control
Y– Winter preheating modulating control
Y1Win– Winter post-heating modulating control
Y2– Summer cooling/dehumidifying modulating control
Y3Sum– Summer post-heating On-Off control
Rt°– Temperature set point adjuster (optional)
RH– Dehumidification set point adjuster (optional)
De t ec t ors Layou t
–––4–––8
M3.1
Detectors Layout
1 2 3– 5 6––
M2.1
Y1 : MODULATING
Run t ime : xxxs
M2.6
Y1-Win:HEATING
Y1-Sum:OFF
M2.7
Y2 : MODULATING
Run t ime : xxxs
M2.8
Y2-Win:OFF
Y2 - Sum: COOL+DHU
M2.9
Y3-Win:OFF
Y3-Sum:HEATING
M2.11
Season Swi t ch ing
DA COMANDO cs
M2.2
Y3: 2 STAGES
M2.10
Use de t ec t o r B4
PREHEAT I NG
M3.3
Y : MODULATI NG
Run t ime : xxxs
M3.4
Y -Wi n : PREHEAT .
Y-Sum:OFF
M3.5
Output 8-9-10:
CONTROL
M2.3
H T
TT
T
➚
B6
B1
B2
YY2
B4
Mu
Mv
Rt°
B7
B3
Y1.inv
T
+ +–
DTU 644
DTU 614
Y3.est
➚
RH
Season Swi tching
XXXXXXXXX
M3.2
B1– Flow temp. detector
B2– Outside temp. detector (for compensation)
B3– Room or extract temp. detector
B4– Preheating temperature detector
B6– Room or extract humidity detector
B7– Battery frost protection detector
Mv– Fan On-Off control
Y1– Winter preheating modulating control
Y2– Summer cooling/dehumidifying modulating control
Y3– Post-heating modulating control
Mu– Humidifier On-Off control
Rt°– Temperature set point adjuster (optional)
RH– Dehumidification set point adjuster (optional)
De t ec t ors Layou t
–––––67 8
M3.1
Detectors Layout
1 2 34 5 6––
M2.1
Y1 : MODULATING
Run t ime : xxxs
M2.6
Y1 -Wi n : PREHEAT .
Y1-Sum:OFF
M2.7
Y2 : MODULATING
Run t ime : xxxs
M2.8
Y2-Win:OFF
Y2 - Sum: COOL+DHU
M2.9
Y3-Win:HEAT ING
Y3-Sum:HEAT ING
M2.11
Season Swi t ch ing
FR CONTROL ss
M2.2
Y3:MODULATING
Run t ime : xxxs
M2.10
Use de t ec t or B4
PREHEAT I NG
M2.4Y : MODULATI NG
Run t ime :xxxs
M3.4
Season Swi tching
XXXXXXXXX
M3.2
H T
TT
T
➚
➚
B6
B1
B2
Y1 Y2
B4
Mu
Mv
Rt°RH
B7
B3
Y3
T
+ +–
DTU 644
DTU 614
Output 8-9-10:
CONTROL
M2.3
14.3– 1 Winter preheating modulating battery with frost protection control
– 1 Summer cooling/dehumidifying modulating battery
– 1 Winter and summer post-heating modulating battery
– 1 Humidifying On-Off unit
Y-Win:FROSTPROT
Y-Sum:OFF
M3.5
Y1
1
Co 3
Cl
2
Op
B2
B1
M
B5
B4MB3B2MB1
11 12 13 14
DTU 644
B6
5 6 7 24 0 0 8 9 10
Rt°
B3
Y2
B7 G
24
1234
D
E2B8 E1 C
Ys 0C
B6
H
312
1
Co 3
Cl
2
Op
T
T T
0
24 V
~
24
Y3
1
Co 3
Cl
2
Op
MB1
11 12 13 14
DTU 614
56 7 24 0 08 9 10
24
1 2 3 4
D
E2E1 C
0C
Mv
NL
B7
M
B3 B4B2 MB5 B6 B7 G B8
T
0
24 V
~
24
Ys
Mu
NL
Mv
cs
0
Win Sum
B4
T
RH
B2
B1
M
B5
B4MB3B2MB1
11 12 13 14
DTU 644
B6
5 6 7 24 0 0 8 9 10
Rt°
B3
Y2
B7 G
24
1234
D
E2B8 E1 C
Ys 0C
B6
H
312
1
Co 3
Cl
2
Op
Y3.sum
T
T T
Y
1
Co 3
Cl
2
Op
B4
MB1
11 12 13 14
DTU 614
56 7 24 0 08 9 10
24
1 2 3 4
D
E2 C
0C
T
Mv
NL
MB3 B4B2 MB5 B6 B7 E1G B8
Mu
NL
1
Co 3
Cl
2
Op
Y1.win
1º 2º
0
24 V
~
24 0
24 V
~
24
Ys
Mv
cs
0
Inv Est
B7
T
RH

13
We reserve the right to make changes without notice
COSTER
14.5– 1 Winter preheating modulating battery with frost protection control and summer cooling/dehumidifying
modulating battery
– 1 Winter post-heating modulating battery
– 1 Summer post-heating On-Off battery
– 1 Humidifying On-Off unit B1– Flow temp. detector
B2– Outside temp. detector (for compensation)
B3– Room or extract temp. detector
B4– Preheating temperature detector
B6– Room or extract humidity detector
B7– Battery frost protection detector
Mu– Comando On-Off umidificatore
Mv– Fan On-Off control
Y– Winter preheating modulating control
Y1Win– Winter post-heating modulating control
Y2– Summer cooling/dehumidifying modulating control
Y3Sum– Summer post-heating On-Off control
Rt°– Temperature set point adjuster (optional)
RH– Dehumidification set point adjuster (optional)
De t ec to r Layout
––––––7 8
M3.1
Detectors Layout
1 2 3– 5 6––
M2.1
Y1 -Wi n : PREHEAT .
Y1 - Sum: COOL+DHU
M2.7
Y2-Win:HEAT ING
Y2-Sum:OFF
M2.9
Y3-Win:OFF
Y3-Sum:HEAT ING
M2.11
Season Swi tching
DA COMANDO cs
M2.2
Y : MODULATING
Run t ime : xxxs
M3.4
Y-Win:FROSTPROT
Y-Sum:OFF
M3.5
Use de t ec tor B4
PREHEAT I NG
M2.4
Output 8-9-10:
CONTROL
M2.3Season Swi t ching
XXXXXXXXX
M3.2
HT
TT
T
➚
B6
B1
B2
Y1
B4
Mu
Mv
Rt°
B7
B3
Y2.inv
T
+
–+
DTU 644
DTU 614
Y3.est
➚
RH
Y3: 2 STAGES
M2.10
Y1 : MODULATING
Run t ime :xxxs
M2.6
Y2 : MODULATING
Run t ime :xxxs
M2.8
B2
B1
M
B5
B4MB3B2MB1
11 12 13 14
DTU 644
B6
5 6 7 24 0 0 8 9 10
Rt°
B3
Y2.win
B7 G
24
1234
D
E2B8 E1 C
Ys 0C
B6
H
312
1
Co 3
Cl
2
Op
Y3.sum
T
T T
MB1
11 12 13 14
DTU 614
56 7 24 0 08 9 10
24
1 2 3 4
D
E2 C
0C
Mv
NL
Mp
NL
MB3 B4B2 MB5 B6 B7 E1G B8
Mu
NL
1
Co 3
Cl
2
Op
Y1
1º 2º
Mv
0
24 V
~
24 0
24 V
~
24
B4
T
Ys
B7
T
RH cs
0
Inv Est

14
E 122 - DTU 644 C2 Eng. 05.05.01
We reserve the right to make changes without notice
COSTER
15. OPERATION DTU 644 is a microprocessor-operated digital controller for temperature and relative humidity
control in air handling units composed of:
–2unitswith3-wireor1,2or3-stageOn-Offmodulatingcontrol.Theunitscanhavethefollowing
functions:
Preheating; Heating; Auxiliary heating; Cooling and dehumidification;
– 1 adiabatic humidification On-Off unit
or vapor humidification unit with 3-wire modulating control
or vapor humidification unit with 0...10 V- control (alternative to air
mixing or heat recuperatingunit)
– 1 air mixing or heat recuperating unit with 0...10 V- (alternative to vapor humidifier)
To adjust the controller to system requirements, proceed as follows:
– configure system according to connected detectors and controls
– assign control outputs Y1, Y2 and Y3 the action they are to perform also according to season
switching, if applicable.
16. TEMPERATURE CONTROL
Temperature control can operate in alternative to:
• Room or extract air detector B3 only:
Fixed point room Heating and Cooling temperature control
• Discharge air detector B1 only:
Fixed point flow Heating and Cooling temperature control
• Room or extract air detector B3 and discharge air detector B1 :
Flow Heating and Cooling temperature control according to room temperature deviation
16.1Desired temperatures
Desired temperatures for heating and cooling
Can be set in and if B3 or B1 and B3 connected
or in and if only B1connected
If the set point adjuster Rt°is connected, these values can be changed remotely.
The value of the change is displayed , in ±°C, next to the set values.
16.2Proportional band and Integral Time
Basic temperature control parameters, Proportional Band and Integral Time, apply to heating
control (Room
: if B3 only or B1 + B3 are connected, or Flow : if B1 only is connected) and can be
changed in the ADJUSTMENT menu.
The ProportionalBand parameter (in ±°C)isusedforother temperature settingsthroughmodifiable
multipliers that adapt it to the different types of controls (Cooling; Preheating; Auxiliary heating;
Dew point; Air Damper).
Examples of PB multipliers with
Pb Flow (heating) = PB Room (heating) x 5.0 (= ±10 °C)
Pb Cooling (room) = PB heating (room) x 0.5 (= ±1 °C)
Pb Cooling (flow) = PB heating (flow) x 0.5 (= ±5 °C)
Pb Preheating = PB flow heating x 1.0 (= ±10 °C)
Pb Dew point = PB room heating x 1.0 (= ±2 °C)
Temper . Room
Prop.Band: 2.0c
M1.1
Det ec tor Layout
––––––––
M2.1
Det ec tor Layout
––3–––––
M2.1
Det ec tor Layout
1–––––––
Det ec tor Layout
1–3–––––
Heat .T . Room
Des i r . : 20 . 0c±0.0
M0.3
Heat.T. Flow
Des i r . : 20 . 0c±0.0
Coo l . T . Room
Des i r . : 25 . 0c±0.0
M0.5
Cool.T. Flow
Des i r . : 25 . 0c±0.0
Det ec tor Layout
––––5–––
M2.1
Temper . Room
Prop band:±2.0c
M1.1
Temper . Room
Integ time: 10m
M1.2
Pb Cool ing =
Pb Hea t ing x 0 . 5
M2.20
Pb Flow =
Pb Room x 5 . 0
M2.19
Pb Preheat i ng =
Pb Hea tRoom x1 . 0
M2.21
Pb Dew poi nt =
Pb Hea tFl ow x1 . 0
Y.. : HEATING
M2...
Y..-Win: HEATING
Y.. - Sum: COOLI NG

15
We reserve the right to make changes without notice
COSTER
Pb Air damper = PB room heating x 1.0 (= ±2 °C)
dt recuperator = PB room heating x 1.0 (= 2 °C)
With B3 only :
Pb auxiliary heating = PB Room Heatingx 1,0 (= ±2 °C)
With B1 and B3 :
Pb Auxiliary Heating = Pb Flow Heating x 1.0 (= ±10 °C)
When detectors B1 and B3, are connected, the flow temperature (B1)
Integral Time parameter is
displayed on a display page to allow for changes to be made separately from the room temperature
parameter.
16.3Control through room detector (B3) only or discharge air detector (B1) only
The controller compares the values and if B3 is used
or and if B1 is used
against the temperature measured by detector B1 or B3, and
calculates the load values for Heating QHea and for Cooling
QCoo according to the deviation measured.
16.4Control through room detector (B3) and discharge air detector (B1)
The controller compares the values and
against the temperature measured by detector B3, and calculates the load values for
desired flow
temperatures for Heating T°fHea and for Cooling T°fCoo according to the deviation measured and
values set:
•
Min : – – c Max : – – c = Heatingflowtemp.min
and max values determine the PbHea
proportional band’s range.
The minimum value T°fminHea helps eliminate
annoying cold drafts in the room. To prevent
heating and cooling simultaneousness, the
minimum value T°fminHea is always 3°C lower
than Cooling flow temperature T°fCoo.
•
Min : – – c Max : – – c = Coolingflowtemp.min
and max values determine the PbCoo
proportional band’s range.
The controller compares desired flow temperatures for
Heating
T°fHea and for Cooling T°fCoo and for Cooling
T°fCoo against the temperature measured by the discharge
air detector B1and derives the load values for Heating
Qhea
and for Cooling
Qcoo according to the deviations detected.
To prevent hot air stratification during the Heating stage
it is possible to prevent the heating flow temp. T°fHea from
exceeding actual room temperature by more than a certain value.
To prevent condensation in the air duct during the Cooling stage it is possible to prevent the
cooling flow temp. T°fCoo from dropping below actual room temperature by more than a certain
value.
Heating Flow
Min:18c Max:50c
M1.4
Hea t . T . Room
Des i r . : 20 . 0c ±0.0
M0.3
Coo l . T . Room
Des i r . : 25 . 0c±0.0
M0.5
Heat ingLimi t Max
Flow–Room :+10c
M1.5
Coo l ingLimi t Max
Room–F l ow : – 7c
M1.7
Hea t . T . Room
Des i r . : 20 . 0c ±0.0
M0.3
Heat.T.Flow
Des i r . : 20 . 0c ±0.0
Coo l . T . Room
Des i r . : 25 . 0c±0.0
M0.5
Heat . T. Flow
Des i r . : 25 . 0c±0.0
Pb Dampers =
Pb Hea tRoom x1 . 0
M2.22
dt Recuperator =
Pb Hea tRoom x1 . 0
Pb Aux heat ing =
Pb Hea tRoom x1 . 0
M2.23
Pb Aux heat ing=
Pb Hea t F l ow x1 . 0
F l ow Temperat ur e
Integr.Time: 10m
M1.3
Cooling Flow
Min: 8c Max:25c
M1.6
0%
100%
Q
T°Hea
PbHea
50%
–+t°
T°Coo
PbCoo
QHea QCoo
t°r
+
T°f maxHea
T°f
–
Pb Hea Pb Coo
T°f Hea
T°f Coo
T°f minRis
T°r Hea
T°r Coo
T°f LimHea = t°r + ∆t° hea
T°f minCoo
T°f maxCoo
T°f LimCoo = t°r – ∆t° coo
T°f minHea = T°f Coo – 3 °C
0%
100%
Q
T°f
Hea
Pbf Hea
50%
–+
t°f
T°f
Coo
Pbf Coo
Q Hea
Q Coo

16
E 122 - DTU 644 C2 Eng. 05.05.01
We reserve the right to make changes without notice
COSTER
16.5Operating modes
The controller can operate in the following modes:
–ON Winter; OFF Winter
–ONSummer;OFFSummer
–ON;OFF
depending on :
– current season according to setting in (see paragraph 24)
– status of season switching ss e/o and/or the control c1 (terminals D-E1-E2)
Examples
:
• With is : – when contact c1 (D-E1) is closed
– when contact c1 (D-E1) is open
• With
or and outside temp. imposes winter operating mode
or and room temp. imposes winter operating mode
or and season periods impose winter operating mode
mode is: – when contact c1 (D-E1) is closed
– when contact c1 (D-E1) is open
• With
or and outside temp. imposes summer operating mode
or and room temp. imposes summer operating mode
or and season periods impose summer operating mode
mode is: – when contact c1 (D-E1) is closed
– when contact c1 (D-E1) is open
• With with contact ss in winter (D-E1 closed)
mode is: – when contact c1 (D-E1) is closed
– when contact c1 (D-E1) is open
• With with contact ss in summer (D-E2 closed)
mode is: – when contact c1 (D-E2) is closed
–whencontactc1 (D-E2) is open
Cur ren t mode :
ON Wi n t e r
M0.2
Season Swi tch i ng
XXXXXXXXX
M2.2
Season Swi t ch ing
NO
M2.2
Cu r r en t mode :
ON
M0.2
Cur r en t mode :
OFF
Season Swi tch ing
WINTER
M2.2
Cu r r en t mode :
ON Wi n t e r
M0.2
Cu r r en t mode :
OFF Wi n t e r
Cu r r en t mode :
ON Summer
M0.2
Cu r r en t mode :
OFF Summe r
Season Swi tch ing
FR OUTS IDE T .
Season Swi tch ing
FR ROOM T .
Season Swi tch ing
FR SEASONS
Season Swi tch ing
SUMMER
M2.2
Season Swi tch ing
FR OUTS IDE T .
Season Swi tch ing
FR ROOM T .
Season Swi tch ing
FR SEASONS
Cu r r en t mode :
ON Wi n t e r
M0.2
Cu r r en t mode :
OFF Wi n t e r
Season Swi tch ing
FR CONTROL ss
M2.2
Season Swi tch ing
FR CONTROL ss
M2.2
Cu r r en t mode :
ON Summer
M0.2
Cu r r en t mode :
OFF Summer

17
We reserve the right to make changes without notice
COSTER
17. OUTSIDE COMPENSATION OF TEMPERATURE
Compensation functions are only enabled if the outside detector B2 is connected. Such functions
can be as follows:
• Compensation of desired flow Heating and Cooling
temperatures;
• Summer compensation of desired room or flow Cooling
temperatures;
17.1Compensation of desired flow Heating and Cooling temperatures
This function can be only used if detectors B1 and B2 are connected, and Detector B3 is not
connected. It is useful when the primary air system, in addition to ensuring air circulation, is also
intended to make up for ambient dispersion.
Desired flow Heating temperature
The controller increases desired temp. when outside temperature drops,
according to settings
• Heating Comp. :NO = function disabled
YES= function enabled
• Opt : xx
c = default outside temp. : winter
• Fpt : xx
c = default flow temp. : winter
Desired flow Cooling temperature
Thecontrollerdecreases desired temp. whenoutsidetemperatureincreases, according to settings:
• Heating Comp. :NO =function disabled
YES= function enabled
• Opt : xx
c = default outside temp. : summer
• Fpt : xx
c = default flow temp. : summer
17.2Summer compensation of desired room Cooling temperature
This function can be only used if detectors B2 and B3 or B1, B2 and B3 are connected. It is useful to
prevent excessive temp. differences between room and outside.
The controller maintains temp. at a constant level
until outside temp. exceeds the value T°Coo+ ∆t°, when this occurs T°Coo is increased by 1°C per
each °C increase in outside temp.
• Heating Comp : NO = function disabled
YES = function enabled
• Diff. O.- R. -T: xx
c = maximum allowed difference between
outside and room temp.
Coo l . T . Room
Des i r . : 25 . 0c±0.0
M0.5
Summer Compen :NO
Diff .O.-R.-T: 6c
M1.10
Coo l i ng Comp. :NO
Opt :+35c Fpt :10c
M1.9
Det ec tors Layout
123–––––
M2.1
Cool.T.Flow
Des i r . : 25 . 0c±0.0
M0.5
Coo l i ng Comp. :NO
Opt :–10c Fpt :50c
M1.8
Det ec tors Layout
12––––––
M2.1
Flow Heat T.
Des i r . : 20 . 0c±0.0
M0.3
Flow Heat T.
Compensa t . : ±00.0
M0.4
Coo l . T . F l ow
Compensa t . : ±00.0
M0.6
Coo l . T . F l ow
Compensa t . : ±00.0
M0.6
Flow Heat T.
Compensa t . : ±00.0
M0.6
–+
–
+
T°m Hea
t°e
T°m
Hea
T°m Hea
T°m p
T°e p
–+
–
+
T°m Coo
t°e
T°m
Coo
T°m Coo
T°m p
T°e p
–+
–
+
T° Coo
t°e
T°
Coo
T° Coo
∆t°1°C
1°C

18
E 122 - DTU 644 C2 Eng. 05.05.01
We reserve the right to make changes without notice
COSTER
18. RELATIVE HUMIDITY CONTROL
The function is only enabled if detector B6 is connected.
Desired Humidification and Dehumidification
values can be set as shown and
If set point adjuster R%, is connected, such values can be changed remotely.
The value of the change is displayed in ±% next to the set values.
The controller compares the desired values against relative humidity as measured by detector B6,
andcalculatestheloadvaluesforHumidification QhumiandforDehumidification Qdehuaccording
to deviations detected:
• Prop. Band
: ±x x . x % = Humidity proportional band
in ±%.
• Integral Time: x x m = Humidity integral time in
minutes
If the humidification control output is
intended to be modulating, it should be set as shown:
18.1Flow humidification limits
Whenhumidity is controlled through detectorB6(roomorextractairduct), if detector B7 isnotbeing
usedforenthalpic-comparisonairdampercontrol,suchdetectorcanbeemployedasHumidification
flow limit.
•
Min : – – % Max :– – % = Min. and max value of Humidification flow humidity
When the value of flow humidity exceeds one of the limit values, the desired Humidification value is
increased or decreased by the set Influence value, for each deviation %.
The adjustment value is displayed in
18.2Cooling – Dehumidification priority
When a single output is concurrently serving for Cooling and Dehumidification functions (COOL +
DEHU mode), the controller compares the two load values and operates according to the higher
one.
Humi d i f i ca t i on
Des i r . : 50 . 0%±0.0
M0.7
Dehumidification
Des i r . : 60 . 0%±0.0
M0.9
Re l a t i veHumid i t y
Prop Band:±6.0%
M1.11
Re l a t i veHumid i t y
Integr.Time: 10m
M1.12
Det ec tors Layout
–––––6– 8
M2.1
Output 8-9-10:
CONTROL
M2.3
Ut i l i zzo SondaB7
LIM.UMIDITA'MAND
M2.5
Flow humidity
Min: 1% Max:99%
M1.13
Flow humidity
Influence : 5%
M1.14
Humidification
Compensa t . : ±00
M0.8
0%
100%
Q
H%
Humid
Pb U
50%
–+
h%
H%
Dehum
Pb U
Q Humi
Q Dehu

19
We reserve the right to make changes without notice
COSTER
19. PREHEATING OR DEW POINT CONTROL
The function is only enabled if detector B4 is connected.
It can be used for the following purposes:
• PREHEATING
=preheaterbatteryunitcontrolaccording
to humidification condensation temperature through
duct mounting detector B4, installed downstream of
the humidification unit.
• DEW POINT= Dehumification value compensation to
limitdewbuilduponswimmingpoolwindows–detector
B4 should be placed so that it adheres to the glass
19.1Preheating temperature control
If detector B3 or detectors B1 and B3 are connected, the
controller calculates preheating temp. T°pre according to
the following:
– Condensation curve calculated on the basis of room
temp.( t°r)and room humidity ( h%a)actual
values
–Minimum value
– Manual adjustment in if applicable
Thecontrollercalculatesthedewpointtemp.T°dpaccording
to the following:
–Minimum value
– Manual adjustment in if applicable
The controller compares preheating temp. T°pre with the temp. measured by detector B4, and
calculates the load value for Preheating
Qpre according to deviation detected.
19.2Swimming pool windows dew point temperature control
The controller calculates the dew point temp. T°dp according to the following:
– Condensation curve calculated on the basis of room
temp.(t°r)and room humidity (h%a)actual values
–Minimum value
– Manual adjustment in if appliable
The controller compares dew point temp. T°dp with the temp. measured by
detector B4, and calculates the reduction of the value requested for
Dehumidification H%Dehu according to deviation detected.
Preheat ing T.
Minimum : 10.0c
M0.11
Dewpoint T.
Minimum : 10.0c
M0.11
Preheat ing T.
Calc. :16.0c±0.0
M0.12
Dewpoint T.
Calc. :16.0c±0.0
M0.12
Dehumidification
Compensa t . : ±0.0
M0.10
Det ec tors Layout
–––4––––
M2.1
20. SPECIAL CONTROL
20.1Auxiliary heater battery unit control
Ifthe system includes anauxiliaryheater battery unit tosupplement
the Heating load, one of the outputs Y1, Y2 or Y3 can be assigned
the AUX. HEA.
function.
Load Qaux cascades from load Qhea.
20.2Heat pump control
If the Air Handling Unit is composed of a direct-exchange, one of
theoutputsY1orY2 canbeassignedtheHT.P.HEA . winterfunction.
Load QH.pmp replicates load Qhea exactly, the only difference
being that when outside temp. drops below the value T°omin, load
QH.pmp is cancelled.
Y..-Win:HT.P.HEA
Y..-Sum:COOLING
M2.7.9
Y.. -Wi n : AUX .HEA.
Y.. - Sum: AUX . HEA .
M2.7.9.11
M1.19
Minim.Outside T.
Hea t Pump : ––c
Preheat ing T.
Minimum : 10.0c
M0.11
Preheat ing T.
Calc. :16.0c±0.0
M0.12
Use de tec tor B4
PREHEAT ING
M2.4
M2.4
Use de tec tor B4
DEWPOINT
Use de tec tor B4
PREHEAT ING
M2.4
Use de tec tor B4
DEWPOINT
T° pre
–+
0%
100%
50%
Q Pre
t° pre
Pb pre
–+
0%
100%
H%Deum
t°dp
Bprv
T°dp
H%Deum
0%
100%
T° Hea
Pb Aux
50%
–+
t°
Q
Hea
Pb Hea Q Aux
0%
100%
50%
–+
t° o
1°C
T°o min
Q Hea
Q H.pmp
50%100% 0%
Q
Hea
T° pre
T° dp
25°
15°
5°
20°
10°
30°
20% 30% 40% 50% 60% 70% 80% 90%
h% r
t° r
6°
10°
15°
20°
25°
30°
35°
t°
r
T° min

20
E 122 - DTU 644 C2 Eng. 05.05.01
We reserve the right to make changes without notice
COSTER
22. OUTPUT Ys Output Ys with 0...10V– control signal can be used for:
•AIRDAMPERTEMP. = Temp. comparison air damper control
AIRDAMPERENTHALPY = Enthalpic comparison air damper control .
HUMIDIFICATION = 0…10 V– vapor humidifier control.
DEHUMIDIFICATION = Air damper control for room dehumidification (swimming pool)
RECUPERATOR = Heat recuperator control
22.1Air damper control through temperature comparison
Whenever actual outside temperature t°r exceeds the target
T°rHea value, the controller starts the progressive opening
of outside air through the PI feature.
Whenever actual outside temperature t°r exceeds the target
T°rCoo value, and outside temperature t°o exceeds actual
roomtemperaturet°r,thecontrollershutsoutsideairthrough
the On-Off control.
Ys - Contro l :
DAMP. TEMPERATURE
M2.12
Detector Layout
–23–––––
M2.1
21.OUTPUTS Y1, Y2, Y3 Outputs Y1, Y2 and Y3 can be configured as:
• Y.. - MODULATING = modulating control for 3-wire valves or 3-
wire signal converters into 0…10 V – or
step controllers.
2STAGES = 2-stageOn-Offcontrol(1;1+2)forsolenoid
valves, pumps, humidifiers, burners,
refrigerators, 2 equal-load electric
batteries, etc.
3STAGES = 2-stage On-Off control (1 ; 2; 1+2) for
2 unequal-load electric batteries.
• Stroke time: xxx s = valve actuator stroke time. It only appears if control is MODULATING.
Each output can be assigned a different action (load). E.g.: Y1: Heating.
If Season Switching is enabled in M2.2a different action can be assigned for each season.
E.g.:Y1 – Win:Heating;Y1 – Sum:Cooling.
• Y1 - .....:PREHEAT. = Preheating
HEATING = Heating
AUX.HEAT = Heating through auxiliary battery
HT.P.HEA. = Heating through heat pump
COOLING = Cooling
COOL+DEHU = Cooling and dehumidification
OFF = Not used in current season
• Y2 - .....:PREHEAT
. = Preheating
HEATING = Heating
AUXHEAT = Heating through auxiliary battery
HT.P.HEA. = Heating through heat pump
COOLING = Cooling
COOL+DEHU = Cooling and dehumidification
OFF = Not used in current season
• Y3 - .....:HUMIDIF . = Humidification
HEATING = Heating
AUXHEAT = Cooling and dehumidification
OFF = Not used in current season
If output 5-6-7 can be used for 1-stage On-Off humidification control,
and output 8-9-10 for Season Control.
Y..- MODULATING
Run t ime :120s
M2.6.8.10
Output 8-9-10
CONTROL SEASON
M2.3
100%
50%
0%
Q
0%
Y
100%50%
Y1: HEATING
M2.7
Y1-Win: HEATING
Y1-Sum: HEATING
Y2 : COOLI NG
M2.9
Y2 -Wi n : COOL I NG
Y2 - Sum: COOL I NG
Y3: HUMIDIF.
M2.11
Y3-Win: HUMIDIF.
Y3-Sum: OFF
0% Q
Y
100%50%
Off
Off
On
On
1stSt
2ndSt
0% Q
Y
100%1/3
Off
Off
On
On
1stSt
2ndSt
2/3
t°o = t°r
t° a
+
0 V
10 V
–
t°o < t°r
1°CYs Pb s
T°r Hea T°r Coo
Q
Hea
Q
Coo
Ys min
t° m
+
–
T°f min
Pb s
MsR MsR