Coster RTU 644 User manual

E 132 - RTU 644 C2 Eng. 06.05.01

We reserve the right to make changes without notice

COSTER

TEMPERATUREAND HUMIDITY CONTROLLER

FOR TWO-BATTERYAIR HANDLING UNIT

RTU 644 Eng. C2

• Temperature and relative humidity control in air handling units

• Power supply 24 V~ , DIN rail mounting

1. APPLICATION

RTU 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).

2. FEATURESThe main features of RTU 644 are as follows:

•Three3-wiremodulatingoutputsor2-stageOn-off(twoequalloads)or3-stage(twounequalloads)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

–externalaircontrolforroomdehumidificationwithcompensationofdewtemperatureonglasswindowsand

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 faulty microprocessor.

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 132

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We reserve the right to make changes without notice

COSTER

AIR TREATMENT

CONTROLLER

DTU 644

COSTER

OUTPUT Y1

–

OUTPUT Ys

ESC

OUTPUT Y2

OUTPUT Y3

ALARM

°c

105

115

50.5 21

4.TECHNICAL DATA (default values in bold print)

• Electrical data

Power supply 24 V ~ ±10%

Frequency 50 … 60 Hz

Consumption 5 VA

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

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 – 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

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

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…10 V–

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

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

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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

Ss Win = On – Winter

Ss Sum = On – Summer

Season switching (M2.2) must be:

through ss control

7. WIRING DIAGRAMS

B1 – Flow air temp. detector

B2 – Outside temp. detector

B3 – Outside temp. detector

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

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

Y.. : MODULATING

Run t ime :

xxx

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 : MODULATING

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

1112 13

024 0Y

7.5Vapor Humidifier Control (0…10 V–)

24 V

24 0 024

Ys.p

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

E1 E2

Win Sum

Win

E1 E2

Sum

E1 E2

132

Co 3

24 V

B4MB3B2MB1

11 12 13 14

DTU 644

5 6 7 24 0 0 8 9 10

Rt°

B7 G

1234

E2B8 E1 C

Ys 0C

312

Co 3

T T

1Y1

312

Win Sum

E 132 - RTU 644 C2 Eng. 06.05.01

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COSTER

9. WHERE TO PLACE DEVICES

9.1Controller The controller

should be placed in a dry environment, in compliance with acceptable environment conditions as

describedunder“TechnicalData”.Iflocatedinenvironmentsclassifiedas“hazardous”itshouldbeinstalledwithin

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 thenorthornorthwest side,ata height ofatleast 3m.abovethe ground,protectedfrom 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: Itmustbeinstalleddownstreamwithrespecttothehumidifyingunit,preferablydownstreamofthedrop

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)

•Performthewiringconnectionsasillustratedinthediagram,incompliancewithapplicableregulationsandusing:

– 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.

E 132 - RTU 644 C2 Eng. 06.05.01

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COSTER

10. TEMPERATURE AND HUMIDITY CONTROL – EXAMPLES

10.1Room 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)

10.2Room temperature and humidity control with flow temperature and humidity limits

10.3Flow temperature and room or flow humidity control

Detector layout

–

3–

6–

M2.1

Detector layout

3–

M2.1

Detector layout

––

6–

M2.1

B6B3

DTU 644

RHRt°

T H

B6B3

B4MB3B2MB1

DTU 644

Rt°

B7 G

312

T T

DTU 644

T H

RHRt°

HT H

B4MB3B2MB1

DTU 644

Rt°

B7 G

312

B6B3

DTU 644

RHRt°

T H

B6B3

T H

B4MB3B2MB1

DTU 644

Rt°

B7 G

T T

312

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COSTER

DTU 644

24 V

B4MB3B2MB1

DTU 644

24 0 0

B7 G

E2B8 E1 C

Ys 0C

T T

1Y1

11. USE OF YSOUTPUT– EXAMPLES

11.1Enthalpic comparison air damper optimization

11.2Temperature comparison air damper optimization

11.3Heat 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

Detector layout

–23–––––

M2.1

Detector layout

–23–––––

M2.1

Ys - Con t r o l :

DAMP. TEMPERATURE

M2.12

Ys - Con t r o l :

RECUPERATOR

M2.12

11.4– Outside air control for room dehumidification (swimming pools) with dew point control (optional)

– 1 Heating modulating battery

Detector layout

1–34

6–

M2.1

Y1: MODULATING

Run t ime :

xxx

M2.6

Y1: HEATING

M2.7

Ys-Cont rol :

DEHUMIDI F I CAT 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 t o r B4

DEW POI NT

M2.4

DTU 644

132

24 V

B4MB3B2MB1

DTU 644

24 0 0

B7 G

E2B8 E1 C

Ys 0C

312

T T

1Y1

312

DTU 644

132

24 V

B4MB3B2MB1

DTU 644

24 0 0

B7 G

E2B8 E1 C

Ys 0C

T T

1Y1

Ys - Con t r o l :

DAMP. ENTHALPY

M2.12

DTU 644

11.5– Vapor humidifying unit control 0…10 V–

24 V

B4MB3B2MB1

DTU 644

24 0 0

B7 G

E2B8 E1 C

Ys 0C

312

B6 – Room or extract humidity detector

B7 – Flow humidity detector (optional)

RH – Humidity set point adjuster (optional)

Ys – Progressive humidifier control

De t ec t or l ayou t

–––––6

M2.1

Ys-Cont rol :

HUMIDI F ICAT ION

M2.12

Use detector B7

FLOW HUM . L IMI T

M2.5

Use de t ec t or B7

OUTSIDE HUMIDITY

M2.5

Ys RH B4

Rt°

B6B3

DTU 644

132

Co 3

24 V

B4MB3B2MB1

11 12 13 14

DTU 644

5 6 7 24 0 0 8 9 10

Rt°

B7 G

1234

E2B8 E1 C

Ys 0C

312

E 132 - RTU 644 C2 Eng. 06.05.01

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COSTER

12. USE OF Y1, Y2, Y3 OUTPUT– EXAMPLES

12.2– 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

Detec tors Layout

6–

M2.1

Y1 : MODULATING

Run t ime :

xxx

M2.6

Y1 :PREHEAT ING

M2.7

Y2: MODULATING

Run t ime :

xxx

M2.8

Y2:HEATING

M2.9

Y3: 2 STAGES

M2.10

Y3 :HUMIDI F .

M2.11

Detec tors Layout

6–

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:HEATING

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

12.1– 1 Preheating modulating battery

– 1 Post-heating modulating battery

– 1 Humidifying On-Off unit

12.3– 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

Detec tors Layout

3–

6–

M2.1

Y1 : MODULATING

Run t ime :xxxs

M2.6

Y1:HEATING

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 tor B4

PREHEAT I NG

M2.4

Use de t ec tor B4

PREHEAT I NG

M2.4

Output 8-9-10:

CONTROL

M2.3

Season Swi tching

M2.2

Season Swi tching

XXXXXXXXX

M2.2

Season Swi tching

M2.2

Y3Y1 Y2

B6B3

DTU 644

RHRt°

Y3Y1 Y2

–

B6B3

DTU 644

RHRt°

Y3Y2Y1

–+

B6B3

DTU 644

RHRt°

Co 3

24 V

B4MB3B2MB1

11 12 13 14

DTU 644

5 6 7 24 0 0 8 9 10

Rt°

B7 G

1234

E2B8 E1 C

Ys 0C

312

Co 3

T T

Co 3

24 V

B4MB3B2MB1

11 12 13 14

DTU 644

5 6 7 24 0 0 8 9 10

Rt°

B7 G

1234

E2B8 E1 C

Ys 0C

312

Co 3

T T

Co 3

24 V

B4MB3B2MB1

11 12 13 14

DTU 644

5 6 7 24 0 0 8 9 10

Rt°

B7 G

1234

E2B8 E1 C

Ys 0C

312

Co 3

T T

E 132 - RTU 644 C2 Eng. 06.05.01

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COSTER

12.4– 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

De t ec t or Layou t

3–

6–

M2.1

Y1 : MODULATING

Run t ime :xxxs

M2.6

Y1:HEATING

M2.7

Y2: 2 STAGES

M2.8

Y2 : COOLI NG

M2.9

Y3: 2 STAGES

M2.10

Y3:HUMIDIF .

M2.11

Season Swi tchi ng

M2.2

12.5– 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

De t ec t or Layou t

3–

6–

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 -Wi n :HUMID I F .

Y3-Sum:OFF

M2.11

Season Swi tchi ng

XXXXXXXXX

M2.2

12.6– 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

De t ec t or Layou t

3–

6–

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-Wi n:OFF

Y2-Sum:HEATING

M2.9

Y3: 2 STAGES

M2.10

Y3 -Wi n :HUMID I F .

Y3-Sum:OFF

M2.11

Season Swi tchi ng

XXXXXXXXX

M2.2

–

B6B3

DTU 644

RHRt°

–

B6B3

DTU 644

RHRt°

1º 2º

24 V

B4MB3B2MB1

11 12 13 14

DTU 644

5 6 7 24 0 0 8 9 10

Rt°

B7 G

1234

E2B8 E1 C

Ys 0C

312

T T

1º 2º

Y1 Y3 Y2

–

B6B3

DTU 644

RHRt°

1º 2º

Co 3

24 V

B4MB3B2MB1

11 12 13 14

DTU 644

5 6 7 24 0 0 8 9 10

Rt°

B7 G

1234

E2B8 E1 C

Ys 0C

312

T T

Co 3

24 V

B4MB3B2MB1

11 12 13 14

DTU 644

5 6 7 24 0 0 8 9 10

Rt°

B7 G

1234

E2B8 E1 C

Ys 0C

312

T T

1º 2º

E 132 - RTU 644 C2 Eng. 06.05.01

We reserve the right to make changes without notice

COSTER

12.7– 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 – Winterheating,summercooling/dehumidifying

modulating control

Y2 – Summer post-heating On-Off control

Y3 – Humidifier On-Off control

Ycs – Heat pump season control

Detec tors Layout

3–

6–

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:HEATING

M2.9

Y3-Win:HUMIDIF.

Y3-Sum:OFF

M2.11

Season Swi tching

XXXXXXXXX

M2.2

Output 8-9-10:

CONTROL SEASON

M2.3

12.8– 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

Detec tors Layout

3–

6–

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:HEATING

M2.9

Y3-Win:HUMIDIF.

Y3-Sum:OFF

M2.11

Season Swi tching

XXXXXXXXX

M2.2

Output 8-9-10:

CONTROL SEASON

M2.3

12.9– 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

Detec tors Layout

3–

6–

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 tching

XXXXXXXXX

M2.2

Output 8-9-10:

CONTROL

M2.3

Y3: 2 STAGES

M2.10

Use de t ec tor B4

PREHEAT I NG

M2.4

Y3 Y2

Ycs

–

B6B3

DTU 644

RHRt°

–

Y3 Y2

Ycs

B6B3

DTU 644

RHRt°

Y1 Y2

–

DTU 644

Rt°

1º 2º

Co 3

24 V

B4MB3B2MB1

11 12 13 14

DTU 644

5 6 7 24 0 0 8 9 10

Rt°

B7 G

1234

E2B8 E1 C

Ys 0C

312

T T

Ycs

CoWinSum

Ycs

2ºSt

1º 2º

24 V

B4MB3B2MB1

11 12 13 14

DTU 644

5 6 7 24 0 0 8 9 10

Rt°

B7 G

1234

E2B8 E1 C

Ys 0C

312

T T

Win

Sum

1ºSt

Co 3

24 V

B4MB3B2MB1

11 12 13 14

DTU 644

5 6 7 24 0 0 8 9 10

Rt°

B7 G

1234

E2B8 E1 C

Ys 0C

Co 3

T T

1º 2º

E 132 - RTU 644 C2 Eng. 06.05.01

We reserve the right to make changes without notice

COSTER

13. 3 OR 4 BATTERY SYSTEM CONTROL– EXAMPLES

13.1– 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)

De t ec t or Layou t

3–

6–

M2.1

Y1 : MODULATING

Run t ime :xxxs

M2.6

Y1-Wi n: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:HUMIDI F.

Y3-Sum:OFF

M2.11

Season Swi tching

FR CONTROL ss

M2.2

Ou t pu t 8 - 9 - 10 :

CONTROL

M2.3

13.2– 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)

De t ec t or Layou t

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-Wi n:OFF

Y2 - Sum:COOL+DHU

M2.9

Y3-Win:HEATING

Y3-Sum:HEATING

M2.11

Season Swi tching

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

➚

YY1

Rt°RH

+ +–

DTU 644

DTF 314

H T

➚

Y1 Y2

Rt°RH

+ +–

DTU 644

DTU 614

Co 3

B4MB3B2MB1

11 12 13 14

DTU 644

5 6 7 24 0 0 8 9 10

Rt°

B7 G

1234

E2B8 E1 C

Ys 0C

312

Co 3

T T

24 V

Co 3

Win Sum

Co 3

B4MB3B2MB1

11 12 13 14

DTU 644

5 6 7 24 0 0 8 9 10

Rt°

B7 G

1234

E2B8 E1 C

Ys 0C

312

Co 3

T T

24 V

MB1

DTF 314

1 2 3 4

B3 F2B2

24 V

Co 3

24 0

Win Sum

0C C

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