Coster XTU 614 User manual

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E 134 - XTU 614 C1 Eng. 22.11.10 AM REV. 03
We reserve the right to make changes without notice
COSTER
TEMPERATURE AND HUMIDITY CONTROLLER
FOR ONE-BATTERY AIR HANDLING UNIT
XTU 614 C1 Eng.
• Temperature & relative humidity control in air handling units
• 24-hour, 7-day, and annual programming
• Power supply 24 V~, DIN rail mounting
• Communication systems:
– C-Bus: XTU 614 is already wired for Telemanagement
To enable Telemanagement use C-Bus Plug-in, model ACB 460 C1 or later,
to be ordered separately as an accessory.
1. APPLICATION
XTU 614 is designed for temperature and humidity control in air handling units composed of:
• 1 battery for hot/chilled water or vapour with 3-wire modulating controll
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 vapour-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 regenerator with 0...10 V- or On-Off control (CSV 304 converter).
The controller can be included in a Telemanagement system through the C-Bus connection.
2. FEATURES
The main features of XTU 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:
– winter and summer room temperature control with optional summer external compensation; flow limits to
prevent cold drafts, hot air stratification and condensing in the air ducts.
– flow temperature control (heating or cooling) with optional winter and summer compensation
– pre-heating temperature control according to room temperature and humidity
– battery frost protection temperature control
• One On-off output for winter adiabatic humidifying unit control
• One 0...10 V- progressive output, configurable forr:
– control of air mixing according to temperature, with minimum limit opening external air
– external air control for room dehumidification with compensation of dew point temperature on glass windows
and with minimum limit external air
– On-Off control heat regenerator according to room-outside temperature comparison
– adjustment vapour humidifier by means of 0...10 V- control
• One 3-wire On-Off output for manual or automatic season switching.
• Two On-Off outputs for control fan and pump according to timed program in use
• Winter battery frost protection temperature control
• Programming by means of 25 24-hour programs, five 7-day programs, and 25 annual period programs
• Variation of temp. and humidity set-points by remote control
• Alarms for short and open sensor circuits and for system and equipment malfunction.
• Enabled for data transmission via C-Bus with local PCs or remote Telemanagement PC.
To enable data transmission and Telemanagement use C-Bus Plug-in type ACB 460 C1 or later
To communicate locally with a PC use test Plug-in ACX 232
3. ACCESSORIES
No. Description Type Application Range Sensing element t° Code Data sheet
1 Discharge air temperature duct sensor STA 010 0…60 °C NTC 10 kΩ B1 –
1 Outside air temperature sensor - duct type STA 001 –30…+40 °C NTC 1 kΩ B2 –
or wall type SAE 001 –30…+40 °C NTC 1 kΩ B2 –
1 Extract air temperature sensor - duct type STA 010 0…40 °C NTC 10 kΩ B3 –
or room type SAB 010 0…40 °C NTC 10 kΩ B3 –
1 Pre-heating temperature sensor - duct type STA 010 0…40 °C NTC 10 kΩ B4 –
or dew point STV 010 0…40 °C NTC 10 kΩ B4 –
1 Room relative humidity and temperature sensor SAU 012 0…40 °C ; 20…80 % NTC 10 kΩ B3-B6 –
or duct relative humidity sensor SUR 012 20…80 % – B6 –
or duct relative humidity sensor (swimming pools) SUR 051 10…90 % – B6 –
1 Battery frost protection temp. sensor - cable type SAF 010 0…40 °C NTC 10 kΩ B7 –
or immersion type SIH 010 0…40 °C NTC 10 kΩ B7 –
1 0…10 V – to 2-stage On-Off converter CSV 304 – – Y –
1 Temperature set-point adjuster CDB 100 ± 5 °C – Rt° –
1 Relative humidity set-point adjuster CDB 200 ± 10 % – RH –
1 Outside air minimum distance positioner PCS 04 – – Rs –
Accessories for Telemanagement
1 Plug-in for communicating via C-Bus ACB 460 C1 – – – –
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BUS
C
OPTIONAL

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E 134 - XTU 614 C1 Eng. 22.11.10 AM REV. 03
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COSTER
5. OVERALL DIMENSIONS
6. FACIA
4. TECHNICAL DATA (default values in bold print)
• Electrical
Power supply 24 V ~ ± 10%
Frequency 50 … 60 Hz
Consumption 5 VA
Protection IP40
Radio interference 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 Italian Elechtrotech Comm. (CEI)
Data storage period 5 years
Software Class A
• Mechanical
Enclosure Modulo DIN 6E
Installation on DIN 35 rail
Materials:
base NYLON
cover ABS
Room temperature:
operating 0 … 45°C
storage – 25 … + 60°C
Room humidity Class F DIN 40040
Dimensions 105 x 115 x 71.5
Weight 0.6 kg
• Programs and annual periods
24-hour programs 1…25
24-hour schedules 2…6
7-day programs 1…5
Annual periods 0…25
• Setting range
Heating (or cooling) temperatures:
desired room (B3 or B1+B3) 0…20 (25)…40 °C
desired flow (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 design temp. (B1+B2) –30…–10 (35)…40 °C
design flow (B1+B2) 1…50 (10)…60 °C
summer compensation Te–Ta (B2+B3) 0…6…20 °C
Pre-heating or glass 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 or B1+B3) 1…2 …40 °C
1 - Alphanumeric display 7 - Humidifier warning
2 - + and – operating keys 8 - Frostprotection warning
3 - ← and →operating keys 9 - Air damper warning
4 - Valve warnings 10 - Readings alarm warning
5 - Pump warning 11 - Malfunction warning
6 - Fan warning 12 – Plug-in type ACB 460 C1 for
C-Bus communication
Heating (flow) (B1) 1…10…40 °C
Various temp. Proportional Band multipliers:
Heating flow (B1+B3) PB amb x 0.5…5…20
Cooling temperatures PB heat x 0.5…20
Pre-heating (B4) PB heat disch x 0.5…1…20
Dew point glass (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 heat 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 %
Proportional Band humidity 0.5…6 …40 %
Integral time humidity 0…10…255 min
Y output control: – modulating
– 2 stage
– 3 stage
Ys output control 0…10 V–
Valve run time (modulating) 30…120…630 s
Season switching: – manual from display
– by external control
– auto based on outside temp.
– auto based on room temp.
– automatic by dates
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 h
Summer 1…4…60 h
• Alarm setting
Telemanagement (from PC)
Alarm call attempts 1…5…255
Interval between calls 2…10…255 m
Alarms (settings from PC)
Flow temp. diff. threshold (B1) 0…5…99 °C
Flow temp. diff. delay 2…30…255 min
Room temp. diff. threshold (B3) 0…1…99 °C
Room temp. diff. delay 2…30…255 min
Delay trip Frosprot temperature (B4) 2…5…255 min
Humidity diff. threshold (B6) 0…10…100 %
Humidity diff. delay 2…30…255 min
• Telemanagement
Speed C-Bus chosen from 1200, 2400, 4800, 9600 bauds
Warning :
In case of static, the equipment’s output controls may change
settings; original settings will be subsequently restored auto-
matically.
12
4 5 6 7 8 9 11 310 12
1 – Protective cover for electronic components
2 – Base with transformer, relay & terminal blocks
3 – Screws for fixing cover- base
4 – DIN rail securing elements
5 – DIN rail release lever
6 – Plug-in for C-Bus communication
1
2
3
3
4
56

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COSTER
7. WIRING DIAGRAM
B1 – Discharge air temp. sensor 0...60°C
B2 – Outside temp. sensor –30...+40°C
B3 – Room or extract air temp. sensor 0...40°C
B4 – Pre-heating or dew point temp. sensor 0...40°C
B6 – Room humidity or extract air or discharge air sensor
B7 – Frost protection sensor
Y – 3-wire modulating control or 2- or 3-stage On-Off
Ys – 0...10V- control of air dampers or heat recuperator or
vapour humidifier
Ycs – Season switch
Mv – Fan control
Mp – Pump control
Mu – Adiabatic humidifier control
Rt° – Heating setting adjuster
RH – Humidity setting adjuster
Rs – Outside air minimum distance positioner
cs – Season switch:1 = winter, 2 = summer
C-Bus – Transmission Telemanagement
Y : M O D U L A T I N G
R u n t i m e : x x x s
M3.5
7.1 3-wire modulating valve control
7.2 Electric battery control 7.3 Direct expansion battery control
Y : 2 S T A G E S
M3.5
2 equal loads
Y : 3 S T A G E S
M3.5
Y : 2 S T A G E S
M3.5
2 unequal loads
On-Off according to program in use (M0.2 or M0.4)
Season Switching (M3.2) can be: No; Winter; Summer; By Outside T; By Room T; By Seasons
c1 open : On-Off according to Program setting (M0.2 or M0.4)
c1 closed : Always On (for switchings outside program)
To use c1 as only On-Off control set OFF in Programs in use (M0.2 and M0.4).
Season switch (M3.2) can be: No; Winter; Summer; From Outside T; From Room T; From Seasons.
cs Win : On-Off by Winter Program in use (M0.2)
cs Sum: On-Off by Summer Program in use (M0.4)
Season switching (M3.2) must be : by cs control
cs Win & c1 open : On-Off -according to Winter Program setting (M0.2)
cs Win & c1 closed: On-Off -Always On, Winter
cs Sum & c1 open : On-Off -according to Summer Program setting (M0.4)
cs Sum & c1 closed: On-Off -Always On, Summer
To use c1 as only On-Off control, set OFF in the Program setting (M0.2 and M0.4).
Season Switching (M3.2) must be : As control cs + c1
7.5 Use of D-E1-E2 outputs – examples
cs – Control of manual or centralised season switching or by controller with season switch type XTU 614.
c1 – On-Off switch for manual control or by fan heavy duty switch,
0
24 V ~
24
24 0 024
Ys
Ys
Y0
7.4 Vapour humidifier control (0…10 V–)
Y s - C o n t r o l :
H U M I D I F .
M3.5
1
2
3
4
L
Y.e
N
1st
2nd
1
2
3
4
1st 2nd
Y.c
1
2
3
4
MYs B1 B2 B3 B4 B5 B6 DC
0C
T T
M M B7 B8G
T
TT
Co Co Sum Win
Cl
Op
0Y1
24
124 24 0 0 2 3 46 7 8 9 11 12 13 1410
XTU 614
YYcs
5
Rs Ys
B1 B2 B3 B4 B6 B7 RHRt˚ c � 8 � � �s
WinSum
C BUS
MBG
H
24 0 N N L NL L
Mu Mp Mv
24 V ~

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COSTER
9. SITING DEVICES
9.1 Controller
The controller should be sited in a dry environment which meets the relevant ambient conditions given under 4.TE-
CHNICAL DATA “, If installed in a location classified as “Hazardous” it must be installed in a cabinet for electrical
equipment constructed according to the regulations in force for the class of danger concerned.
The controller can be mounted on a DIN rail and housed in a standard DIN enclosure.
9.2 Discharge air temperature sensor B1
B1 must be installed downstreamof the discharge air fan.
9.3 Outside temperature sensor B2
STA 001: It may be used in systems with constant inflow of outside air. It must be installed upstream of the outside
air dampers near the air intake.
SAE 001: It should be used in systems where the intake of outside air is not constant. It must be installed outside
the building, on the north or northwest side, at a height of at least three metres from the ground, protected from
sunlight and as far as possible from windows, doors, chimneys or other direct sources of thermal interference.
9.4 Room temperature or extract air sensor B3, or room temperature and humidity sensor B3 + B6
Room sensors SAB 010 or SAU 012: Must be installed in a spot that represents the average temperature and/or
humidity of a significant room (e.g. living room) at a height of 1.5 to1.6 metres
from the floor, on an inside wall away from windows, doors and sources of
heat and corners, bookcases and curtains should be avoided
STA 010 extract air: Mustbe installed upstream of the extract air fan..
9.5 Air duct humidity detector B6
Extract air SUR 012 or SUR 051: It must be installed upstream of the extract air fan.
Discharge air SUR 012 or SUR 051: It must be installed downstream of the discharge air fan.
9.6 Pre-heating temperature sensor or swimming pool glass dew point B4
Pre-heating STA 010: Must be installed downstream of the humidifying unit, preferably downstream of the drop
separator.
Windows dew point STV 010: Must be installed in contact with the glass most exposed to north.
9.7 Frost protection temperature sensor B7
SAF 010: It should be installed downstream of the pre-heating battery, in contact with the battery itself (cable-type
sensor SAF 010) or immersion type on the battery outflow piping.
8. WIRING
Proceed as follows :
• Separate base and cover
• Mount base on DIN rail and check that securing elements (5.4) hold it firmly in place.
• Carry out wiring according to the diagram and in observance of the relevant regulations in force, and using cables of :
– 1.5 mm2 for power and relay control outputs
– 1 mm2 for sensors and remote control
– 1 mm2 for C-Bus and C-Ring. For wire length limits please see technical data sheets T 021 and T 022
• Reposition the cover on the base / terminal block and fasten with the 4 screws supplied (5.3).
• Check that voltage is correct and supplied by the dedicated auxiliary line, measuring it upstream of the protec-
tion (circuit breaker, fuse....).
• Power up the device.
You are advised not to insert more than two cables in a single terminal of the controller and if necessary to use external junction
boxes.

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COSTER
10. COMMUNICATION
10.1 C-Bus Telemanagement Communication (for more detailed information please see Technical Sheet T 021)
XTU 614 provides:
- remote Telemanagement by means of C-Bus Plug-in type ACB 460 C1
- local communication (e.g. setting via PC) with Test Plug-in ACX 232
Telemanagement is two-way, with 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 change data and values entered on the controller display pages, and the configuration data
dedicated to Telemanagement only (see 4.Technical Data)
- check the operational status of the site components (pumps, accessories in general)
- to acquire system-generated alarms
- to view sensor readings (temperatures: outside, room, flow, etc.)
10.2 C-Bus wiring for local or remote Telemanagement
Each controller must be equipped
with the correct model of the C-Bus
Plug-in of the required type for the
controller in question
Observations : – Before communicating, ensure that the address entered in the controller is the address with which you wish
to communicate via PC.
– It is advisable to use a portable PC powered by battery with the connection to 230 Volts unplugged, since
the earth (0 volts) of the controller is connected to that of the RS 232 and so to that of the PC. By connecting
the two earths together the currents may be dispersed, if the earths have not been well made and if the PC
has its 0 volt connected directly to the central pole of the plug (as is usual).
– The transmisssion speed can be adjusted (1200, 2400, 4800, 9600 bps).
A speed suitable for all the devices connected in C-Bus must be chosen.
ACCESSORIES:
–Test Plug-in = ACX 232
– handy kit = KIT RS 232
The “handy kit” contains the 2
cables & other useful acces-
sories.
10.3 Connection to PC for local communication via test Plug-in ACX 232
Extract the C-Bus Plug-in and insert the test Plug-in ACX 232; use a standard cable to connect the RS232 plug to
the PC (the cables are included in the “HANDY KIT”.
If the PC has only USB sockets use a standard RS232 to USB conversion cable.

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COSTER
B2 – Outside temp. sensor (for compensation only)
B3 – Room or extract air temp. sensor
B6 – Room humidity or extract air sensor
Rt° – Temperature set point adjuster (optional)
RH – Humidity set point adjuster (optional)
11.1 – Room temperature and humidity control
D e t e c t o r s L a y o u t
– 2 3 – 5 6 – 8
M3.1
B1 – Discharge air temp. sensor
B2 – Outside temp. sensor (for compensation only)
B3 – Room or extract air temp. sensor
B6 – Room or extract air humidity sensor
Rt° – Temperature set point adjuster (optional)
RH – Humidity set point adjuster (optional)
11.2 – Room temperature and humidity control with discharge air temperature limits
D e t e c t o r s L a y o u t
1 2 3 – 5 6 – 8
M3.1
B1 – Discharge air temp. sensor
B2 – Outside temp. sensor (for compensation only)
B6 – Discharge air or room or extract air humidity sensor
Rt° – Temperature set point adjuster (optional)
RH – Humidity set point adjuster (optional)
11.3 – Discharge air temperature and room or discharge air humidity control
D e t e c t o r s L a y o u t
1 2 – – 5 6 – 8
M3.1
11. TEMPERATURE AND HUMIDITY CONTROL – EXAMPLES
M
B5
B4
M
B3
B2 GB7B6 B8
M
B1
TTH
M
B
G
B2 B3 Rt B6 RH
XTU 614
GB7B6 B8
M
B5
B4
M
B3
B2
M
B1
T
TTH
M
B
G
B2B1 B3 Rt B6 RH
XTU 614
GB7B6 B8
M
B5
B4
M
B3
B2
M
B1
T
TH
M
B
G
B2B1 Rt B6 RH
XTU 614

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COSTER
12. USE OF YS OUTPUT– EXAMPLES
B2 – Outside temp. sensor
B3 – Room or extract air temp. sensor
Ys – Progressive air damper control
Rs – Outside air min. distance positioner (optional)
12.1 – Temperature comparison air damper optimization
B2 – Outside temperature sensor
B3 – Room or extract air temp. sensor
Ys – Recuperator
U1 – 0...10 V– to On-Off signal converter
12.4 – Vapor humidifying unit control (0...10 V–)
Y s - C o n t r o l :
D E H U M I D I F I C A T I O N
M3.6
12.3 – Outside air control for room dehumidification (swimming pools) with dew point control (optional)
– 1 Heating modulating battery
B1 – Discharge air temp. sensor
B3 – Room or extract air temp. sensor
B4 – Dew point temp. sensor (optional)
B6 – Room or extract air humidity sensor
B7 – Battery antifreeze sensor
Mp – Pump On-Off control
Mv – Fan On-Off control
Rt° – Temperature set point adjuster (optional)
RH – Humidity set point adjuster (optional)
Rs – Outside air min. distance positioner (optional)
Y – Heating modulating control
Ys – Progressive air damper control
(dehumidification)
U s e D e t e c t o r B 4
D E W P O I N T
M3.3
D e t e c t o r s L a y o u t
– 2 3 – – – – –
M3.1
Y s - C o n t r o l :
D A M P . T E M
M3.6
D e t e c t o r s L a y o u t
– 2 3 – – – – –
M3.1
D e t e c t o r s L a y o u t
1 – 3 4 5 6 – 8
M3.1
Y s - C o n t r o l :
R E C U P E R A T O R
M3.6
Y : M O D U L A T I N G
R u n T i m e : x x x s
M3.4
Y : H E A T I N G
M3.5
B6 – Room or extract air or discharge air
humidity sensor
RH – Humidity set point adjuster (optional)
Ys – Progressive humidifier control
Y s - C o n t r o l :
H U M I D I F I C A T I O N
M3.6
D e t e c t o r s L a y o u t
6 – 8
M3.1
12.3 – Heat recuperator On-Off control
M
B5
B4
M
B3
B2
B1 C
0C
D
24 24 0 0
0 Y
24 0
24 V ~
B6 RH
XTU 614
Ys
M
B
G
H
Ys
M
B5 B6 B7 G
B4
M
B3
B2
M
B1 C
0C
T
T
TT
Co Cl
Op
1234567910 11 12 13 14
8
D
24 24 0 0
24 0 Y1
24 0N L N L
24 V ~
B3 B4 Rt B6 B7 RH
Rs B1
Ys
XTU 614
B8 E1 E2
Ys
Mp Mv
M
B
G
H
Y
M
B5 B6 B8 E1 E2B7 G
B4
M
B3
B2
MYs B1 C
0C
T T
D
24 24 0 0
24 0 Y1
24 0
24 V ~
B3
B2
Ys
Rs
XTU 614
B6 B8 E1 E2B7 G
Ys M
B5
B4
M
B3
B2
M
B1 C
0C
TT
D
24 24 0 0
24 0 Y1
24 0
24 V ~
B3
B2
U1
XTU 614

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COSTER
13. USE OF Y OUTPUTS– EXAMPLES
13.2 – 1 Winter heating, summer cooling modulating battery
– 1 Humidifying On-Off unit
B1 – Discharge air temp. sensor
B2 – Outside temp. sensor (for compensation)
B3 – Room or extract air temp. sensor
B6 – Room or extract air humidity sensor
B7 – Battery frost protection sensor
Mu – Humidifier On-Off control
Mv – Fan On-Off control
Mp – Pump On-Off control
Rt° – Temperature set point adjuster (optional)
RH – Humidity set point adjuster (optional)
Y – Heating modulating control
B1 – Discharge air temp. sensor
B2 – Outside temp. sensor (for compensation)
B3 – Room or extract air temp. sensor
B6 – Room or extract air humidity sensor
B7 – Battery frost protection sensor
Mu – Humidifier On-Off control
Mv – Fans On-Off control
Mp – Pump On-Off control
Rt° – Temperature set point adjuster (optional)
RH – Humidity set point adjuster (optional)
Y – Winter heating, summer cooling modulating
control
13.1 – 1 Heating modulating battery
– 1 Humidifying On-Off unit
13.3 – 1 Heating On-Off battery
– 1 Humidifying On-Off unit
B1 – Discharge air temp. sensor
B2 – Outside temp. sensor (for compensation)
B3 – Room or extract air temp. sensor
B6 – Room or extract air humidity sensor
Mu – Humidifier On-Off control
Mv – Fans On-Off control
Rt° – Temperature set point adjuster (optional)
RH – Humidity set point adjuster (optional)
Y – On-Off heating control
D e t e c t o r s L a y o u t
1 2 3 – 5 6 7 8
M3.1
Y : M O D U L A T i N G
R u n T i m e : x x s
M3.4
Y : H E A T I N G
M3.5
S e a s o n S w i t c h i n g
N O
M3.2
D e t e c t o r s L a y o u t
1 2 3 – 5 6 7 8
M3.1
Y : M O D U L A T I N G
R u n T i m e : x x x s
M3.4
Y : H E A T I N G
M3.5
S e a s o n S w i t c h i n g
X X X X X X X X X
M3.2
D e t e c t o r s L a y o u t
1 2 3 – 5 6 – 8
M3.1
Y : 2 S T A G E S
M3.4
Y : H E A T I N G
M3.5
S e a s o n S w i t c h i n g
N O
M3.2
MDC
0C
MM
T
T
T
1234
M
B
G
H
XTU 614
B5
B4 B6 B8 E1 E2B7 G
B3B2
Ys B1
B6
B3 Rt˚B2 RH
B1
567910 11 12 13 14
8
24 24 0 0
24 0 N L N L
24 V ~
Mu Mv
1st 2nd
Win Sum
cs
0
MC
0C
MM
T
T
T
T
Co Cl
Op
1
23
4
D
M
B
G
H
XTU 614
567910 11 12 13 14
8
24 24 0 0
B5
B4 B6 B8 E1 E2B7 G
B3B2
Ys B1
B6
B3 Rt˚B2 B7 RH
B1
24 0 N LN L N L
24 V ~
MpMu Mv
Y
Win Sum
cs
0
Co Cl
Op
M
1234
C
0C
MM
T
T
T
T
D
B6
M
B
G
H
XTU 614
567910 11 12 13 14
8
24 24 0 0
B5B4 B6 B8 E1 E2B7 G
B3
B2
Ys B1
B3 Rt˚B2 B7 RH
B1
24 0 N LN L N L
24 V ~
MpMu Mv
Y

9
E 134 - XTU 614 C1 Eng. 22.11.10 AM REV. 03
We reserve the right to make changes without notice
COSTER
14. 3 - OR 4 - BATTERY SYSTEM CONTROL (XTU644 + XTU 614) – EXAMPLES
14.1 – 1 Winter pre-heating with frost protection control modulating battery
– 1 Summer cooling/dehumidifying modulating battery
– 1 post-heating modulating battery
– 1 Humidifying On-Off unit
B1 – Discharge air. temp sensor
B2 – Outside temp. sensor (for compensation)
B3 – Room or extract air temp. sensor
B4 – Pre heating temperature sensor
B6 – Room or extract air humidity sensor
B7 – Frost protection sensor
Mv – Fans
Mu – Humidifier On-Off control
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)
D e t e c t o r s L a y o u t
– – – – – 6 7 8
M3.1
D e t e c t o r s L a y o u t
1 2 3 – 5 6 – –
M3.1
Y 1 : M O D U L A T I N G
R u n T i m e : x x x s
M3.4
Y 1 - W i n : P R E H E A T .
Y 1 - S u m : O F F
M2.6
Y 2 : M O D U L A T I N G
R u n T i m e : x x x s
M2.7
Y 2 - W i n : O F F
Y 2 - S u m : C O O L + D E H U
M2.8
Y 3 - W i n : H E A T I N G
Y 3 - S u m : H E A T I N G
M2.10
S e a s o n S w i t c h i n g
F R C O N T R O L s s
M3.2
Y 3 : M O D U L A T I N G
R u n t i m e : x x x s
M2.9
S e a s o n S w i t c h i n g
X X X X X X X X X
M3.2
13.4 – 1 Winter heating, summer cooling modulating battery with season switching heat pump
– 1 Humidifying On-Off unit
B1 – Discharge air temp. sensor
B2 – Outside temp. sensor (for compensation)
B3 – Room or extract air temp. sensor
B6 – Room or extract air humidity sensor
B7 – Battery frost protection sensor
Mu – Humidifier On-Off control
Mv – Fans On-Off control
Mp – Pump On-Off control
Rt° – Temperature set point adjuster (optional)
RH – Humidity set point adjuster (optional)
Y – modulating control winter heating & summer
cooling
Ycs – Heat pump season control
13.5 – 1 Winter heating, summer cooling On-Off battery with heat pump season switching
– 1 Humidifying On-Off unit
B1 – Discharge air temp. sensor
B2 – Outside temp. sensor (for compensation)
B3 – Room or extract air temp. sensor
B6 – Room or extract air humidity sensor
Mu – Humidifier On-Off control
Mv – Fans On-Off control
Rt° – Temperature set point adjuster (optional)
RH – Humidity set point adjuster (optional)
Y – Winter heating, summer cooling
On-Off control (heat pump)
Ycs – Heat pump season control
D e t e c t o r s L a y o u t
1 2 3 – 5 6 7 8
M3.1
Y : M O D U L A T I N G
R u n T i m e : x x x s
M3.4
Y - W i n : H E A T I N G
Y - S u m : C O O L I N G
M3.5
S e a s o n S w i t c h i n g
X X X X X X X X X
M3.2
D e t e c t o r s L a y o u t
1 2 3 – 5 6 7 8
M3.1
Y : 2 S T A G E S
M3.4
Y - W i n : H E A T I N G
Y - S u m : C O O L I N G
M3.5
S e a s o n S w i t c h i n g
X X X X X X X X X
M3.2
U s e d e t e c t o r B 4
P R E H E A T I N G
M3.3
O u t p u t 8 - 9 - 1 0 :
C O N T R O L
M2.3
Y : M O D U L A T I N G
R u n t i m e : x x x s
M3.4
Y - W i n : F R O S P R O T .
Y - S u m : O F F
M3.5
HT
TT
T
++
–
T
XTU 614
XTU 644
B6 B3
Rt RH
B2 B1
B7
B4
Y2Y1 Y3
Mv
Mu
MDC
0C
MM M
T
T
T
1234
B5
B4 B6 B8 E1 E2
B7
B3
B2
Ys B1
M
B
G
H
567910 11 12 13 14
8
24 24 0 0
N L N L
B6
B3 Rt˚B2 RH
B1
Sum
Win
cs
0
24 0
24 V ~
Sum Win Co
Ycs
Mu Mv
1st Stage
2nd Stage
Y
XTU 614
MDC
0C
MM
1234
Co Cl
Op Sum Win Co
B5B4 B6 B8 E1 E2B7 G
B3B2
Ys B1
B6
B3 RtB2 B7 RH
B1
567910 11 12 13 14
8
24 24 0 0
24 0 N LN L N L
24 V ~
MpMu Mv
Y
cs
Ycs
XTU 614
T
T
T
T
M
B
G
H
SumWin
0
M
B5
B4 G
B7 B8 E1 E2
B6
M
B3
B2
M
B1Ys B5
B4 B7 B8 E1 E2
B6B3
B2
B1
Ys
DC
0C
Co Cl
Op
T
TT
M
1
234
C
0C
M G
M
T
T
Co Cl
Op
12345678910 11 12 13 14
24 24 005678910 11 12 13 14 24 24 00
Co Cl
Op
D
M
B
G
H
B6 RH
cs
B7
B3 B4 Rt˚B2
Mu Mv
B1
24 0
24 V ~
24 0 N L N L
24 V ~
Win Sum
Mv
Y1 Y3 Y2
XTU 644 XTU 614

10
E 134 - XTU 614 C1 Eng. 22.11.10 AM REV. 03
We reserve the right to make changes without notice
COSTER
14.2 – 1 Winter pre-heating 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 – Discharge air temp. sensor
B2 – Outside temp. sensor (for compensation)
B3 – Room or extract air temp. sensor
B4 – Pre-heating temperature sensor
B6 – Room or extract air humidity sensor
B7 – Frost protection sensor
Mu – Humidifier On-Off control
Mv – Fans
Y – Winter pre-heating 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 for humidifying only)
D e t e c t o r s L a y o u t
1 2 3 – 5 6 – –
M2.1
Y 1 : M O D U L A T I N G
R u n t i m e : x x x s
M2.5
Y 1 - W i n : H E A T I N G
Y 1 - S u m : O F F
M2.6
Y 2 : M O D U L A T I N G
R u n t i m e : x x x s
M2.7
Y 2 - W i n : O F F
Y 2 - S u m : C O O L + D E H U
M2.8
Y 3 - W i n : O F F
Y 3 - S u m : H E A T I N G
M2.10
S e a s o n S w i t c h i n g
F R C O N T R O L c s
M2.2
Y 3 : 2 S T A G E S
M2.9
U s e d e t e c t o r B 4
P R E H E A T I N G
M3.3
Y : M O D U L A T I N G
R u n t i m e : x x x s
M3.4
Y - W i n : P R E H E A T .
Y - S u m : O F F
M3.5
O u t p u t 8 - 9 - 1 0 :
C O N T R O L
M2.3
S e a s o n S w i t c h i n g
X X X X X X X X X
M3.2
14.3 – 1 Battery modulating winter pre-heating with frost protection control and summer cooling/dehumidifying
– 1 Battery winter post-heating modulating
– 1 Battery summer post-heating On-Off
– 1 Humidifying On-Off unit
B1 – Discharge air temperature sensor
B2 – Outside temperature sensor (for compensation)
B3 – Room or extract air temp. sensor
B4 – Preheating temperature sensor
B6 – Room or extract air humidity sensor
B7 – Frost protection sensor
Mu – Adiabatic humidifier On-Off control
Mv – Fans
Y – Winter pre-heating control
Y1iwin – Winter post-heating control
Y2 – Summer cooling/dehumidifying control
Y3sum – Summer post-heating control
Rt° – Temperature set point adjuster (optional)
RH – Dehumidification set point adjuster (optional for humidifying only)
D e t e c t o r s L a y o u t
– – – – – – 7 8
M3.1
D e t e c t o r s L a y o u t
1 2 3 – 5 6 – –
M2.1
Y 1 : M O D U L A T I N G
R u n t i m e : x x x s
M2.5
Y 1 - W i n : P R E H E A T .
Y 1 - S u m : C O O L + D E H U
M2.6
Y 2 : M O D U L A T I N G
R u n t i m e : x x x s
M2.7
Y 2 - W i n : H E A T I N G
Y 2 - S u m : O F F
M2.8
Y 3 - W i n : O F F
Y 3 - S u m : H E A T I N G
M2.10
S e a s o n S w i t c h i n g
F R C O N T R O L s s
M2.2
Y 3 : 2 S T A G E S
M2.9
Y : M O D U L A T I N G
R u n t i m e : x x x s
M3.4
Y - W i n : F R O S T P R .
Y - S u m : O F F
M3.5
U s e d e t e c t o r B 4
P R E H E A T I N G
M2.4
O u t p u t 8 - 9 - 1 0 :
C O N T R O L
M2.3
S e a s o n S w i t c h i n g
X X X X X X X X X
M3.2
D e t e c t o r s L a y o u t
– – – 4 – – 7 8
M3.1
M
B5
B4
M
B3
B2
M
B1
3
DC
0C
T
TT
Co Cl
Op
M
1234
D E2
T
MM
T
124
Co Cl
Op Co Cl Op
C
0C
G
B7 B8 E1 E2
B6Ys B5 B4B3B2B1 B7 E1B8
G
B6Ys
567567 8910 8910 11 12 11 12
13 14 13 14
24 24 0024 24 00
H
Mu Mv
N L N L
M
B
G
B6 RH cs
B7B4
B3 Rt˚B2
B1
Win Sum
Mv
Y3.sum
24 0
24 V ~
24 0
24 V ~
Y1.win Y2 Y
0
1st 2nd
XTU 644 XTU 614
G
B7 B8 E1 E2
B6
Ys
5678910 8910 11 12 11 12
13 14 13 14
24 24 00567 24 24 00
M
B5
B4
M
B3
B2
M
B1 G
B7 B8 E1 E2
B6
Ys B5
B4B3B2B1
DC
0C
Co Cl
Op
T
TT
MC
0C
MM
TT
1234
1234
Co Cl
Op
D
Mu Mp Mv
N L N L N L
Y3.sum
24 0
24 V ~
24 0
24 V ~
Y1 Y2.win
H
M
B
G
B6 RH cs
B7
B3 B4 Rt˚B2
B1
Win Sum
Mv
0
1st 2nd
XTU 644 XTU 614

11
E 134 - XTU 614 C1 Eng. 22.11.10 AM REV. 03
We reserve the right to make changes without notice
COSTER
16. TEMPERATURE CONTROL
Temperature control can operate alternatively with:
• Room or extract air sensor B3 only:
Fixed point control of room heating and cooling temperature
• Discharge air sensor B1 only:
Fixed point control of heating and cooling discharge air temperature.
• Room or extract air sensor B3 and discharge air sensor B1:
Control of heating and cooling discharge air temperature according to deviaton of room tem-
perature
16.1 Desired temperatures
The desired temperatures for heating and cooling
Can be entered in and if B3 or B1 and B3 are connected
or in and if only B1 is connected
If set point adjuster Rt° is connected it is possible to adjust such values remotely.
The value of the variation made is shown, in ±°C, next to the values entered.
16.2 Proportional 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 discharge air: if B1 only is connected) and
can be changed in the SETTINGS menu.
The Proportional Band parameter (in ± °C) is used for the other temperature settings by means of
modifiable multipliers that adapt it to the different types of control (Cooling; Pre-heating; Auxiliary
heating; Dew point; Air Dampers).
Examples of PB multipliers with
PB Disgarge air (heating) = PB Room (heating) x 5.0 (= ± 10 °C)
PB Cooling (room) = PB heating (room) x 0.5 (=± 1 °C)
PB Cooling (Disgarge air) = PB heating (Disgarge air) x 0.5 (= ± 5 °C)
PB Pre-heating = PB Disgarge air heating x 1.0 (= ± 10°C)
PB Dew point = PB room heating x 1.0 (= ± 2 °C)
15. OPERATION
XTU 614 is a microprocessor-based digital controller for temperature and relative humidity
control in air handling units composed of:
– 1 unit with 3-wire modulating control, or 1, 2 or 3-stage On-Off control which can be:
Pre-heating; Heating; Cooling; Heating with heat pump.
– 1 adiabatic humidification On-Off unit
or vapour with 0...10 V- control (as alternative to air-mixing or
heat recovery unit
– 1 air mixing or heat recovery unit) with 0...10 V- control (as alternative to vapour humidifier)
To adjust the controller to the site requirements, proceed as follows:
– configure site according to sensors and controls connected.
– assign to control output Y the action it is required to perform also according to season
switching, if applicable.
D e t e c t o r s L a y o u t
– – – – – – –
M3.1
D e t e c t o r s L a y o u t
– – – – 5 – –
M3.1
Y : H E A T I N G
M3.5
Y - W i n : H E A T I N G
Y - S u m : C O O L I N G
D e t e c t o r s L a y o u t
1 – 3 – – – –
D e t e c t o r s L a y o u t
1 – – – – – –
D e t e c t o r s L a y o u t
– – 3 – – – –
M3.1
H e a t T . R o o m
D e s i r . : 2 0 . 0 c ± 0 . 0
M0.5
H e a t T . F l o w
D e s i r . : 2 0 . 0 c ± 0 . 0
C o o l T . R o o m
D e s i r . : 2 5 . 0 c ± 0 . 0
M0.7
C o o l T . F l o w
D e s i r . : 2 5 . 0 c ± 0 . 0
T e m p e r . R o o m
P r o p . b a n d : ± 2 . 0 c
M2.1
T e m p e r . R o o m
I n t e g r . T i m e : 1 0 m
M2.2
P b C o o l i n g =
P b H e a t i n g x 0 . 5
M3.15
P b F l o w =
P b R o o m x 5 . 0
M3.14
P b P r e h e a t i n g =
P b H e a t F l o w x 1 . 0
M3.16
P b D e w p o i n t =
P b H e a t R o o m x 1 . 0
T e m p e r . R o o m
P r o p . B a n d : ± 2 . 0 c
M2.1

12
E 134 - XTU 614 C1 Eng. 22.11.10 AM REV. 03
We reserve the right to make changes without notice
COSTER
PB Air dampers = PB room heating x 1.0 (= ± 2 °C)
PB recuperator = PB room heating x 1.0 (=± 2 °C)
PB Frost protection = PB room heating x 1.0 (=± 10°C)
When sensors B1 and B3 are connected, the Integral Time parameter of the discharge air tempe-
rature (B1) is shown on a display page to permit changes to be made to it separately from the room
temperature parameter.
P b D a m p e r s =
P b H e a t R o o m x 1 . 0
M3.17
d T R e c u p e r a t o r =
P b H e a t R o o m x 1 . 0
F l o w T e m p e r a t u r e
I n t e g r . T i m e : 1 0 m
M2.3
P b F r o s t p r o t e c t =
P b H e a t F l o w x 5 . 0
M3.18
16.3 Control by room detector (B3) only or discharge air detector (B1) only
The controller compares the values: or if B3 is used
or or if B1 is used
with the temperature measured by sensor B1 or B3,
and calculates the load values for Heating QHea
and for Cooling QCoo according to the deviations
measured .
16.4 Control by room detector (B3) and discharge air detector (B1)
The controller compares the values: or
with the temperature measured by sensor
B3, and calculates the desired discharge
air temperatures for Heating T°fHea and for
Cooling T°fCoo according to the deviation
measured and the values set:
• Min : – – c Max : – – c = minimum and maximum values of Heating discharge air temp. which
determine the range of the Proportional Band (BpHea.).
The minimum value T°fminHea helps to eliminate annoying cold drafts in the room.
• Min : – – c Max : – – c = minimum and maximum values of Cooling discharge air temp. which
determine the range of the Proportional Band BpCoo.
The controller compares desired discharge air tempe-
ratures for Heating T°fminHea and for Cooling T°fCoo
and for Cooling T°fCoo against the temperature mea-
sured by the discharge air detector B1 and derives the
load values for Heating Qhea and for Cooling Qcoo
according to the deviations detected.
When the manipulation of air dampers (M3.6) is foreseen the operation is
optimised.
If under Ambient Authority (M2.6 bis) a value other than zero
has been set, the controller re-calculates the desired minimum
heating flow temperature (T°fminHea) at the moment in which
the measured room temperature is between T°fminHea) at the
moment in which the measured room temperature is between
T°Hea and T°Coo
Example: values set T°fminHea: 18°C, T°Hea: 20°C, T°Coo: 25°C,
Ambient Authority: 2°C.
Operation: for each degree of increase in room temperature between 20°C
(T°Hea) and 25°C (T°Coo), the desired value of minimum flow heating
will be decreased by 2°C (T°fmin Hea).
If Ambient Authority: 0°C the function is excluded
H e a t T . R o o m
D e s i r . : 2 0 . 0 c ± 0 . 0
M0.5
H e a t T . F l o w
D e s i r . : 2 0 . 0 c ± 0 . 0
C o o l T . R o o m
D e s i r . : 2 5 . 0 c ± 0 . 0
M0.7
C o o l T . F l o w
D e s i r . : 2 5 . 0 c ± 0 . 0
H e a t i n g F l o w
M i n : 1 8 c M a x : 5 0 c
M2.4
H e a t T . R o o m
D e s i r . : 2 0 . 0 c ± 0 . 0
M0.5
H e a t T . R o o m
D e s i r . : 2 5 . 0 c ± 0 . 0
M0.7
C o o l i n g F l o w
M i n : 8 c M a x : 2 5 c
M2.6
A m b i e n t A u t h o r i t y
M i n F l o w H e a t : 0 . 0 c
M2.6 bis
A m b i e n t A u t h o r i t y
M i n F l o w H e a t : 0 . 0 c
M2.6 bis
Y s - C o n t r o l :
D A M P E R S T E M P E R A T
M3.6

13
E 134 - XTU 614 C1 Eng. 22.11.10 AM REV. 03
We reserve the right to make changes without notice
COSTER
16.5 Operating modes
The controller can operate in the following modes: – ON Winter; OFF Winter
– ON Summer; OFF Summer
– ON ; OFF
depending on: : – current season according to setting in M3.2 (see section 24)
– Program in use selected in M0.2 or in M0.4
– Status of season switch cs and/or the c1 control (terminals D-E1-E2).
Examples :
• With mode is: – When program in use requires unit to be On
– When program in use requires unit to be off and switch
c1 (D-E1) is closed.
– When Program in use requires unit to be off and switch
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 Winter Program in use requires unit to be On
– When Winter Program in use requires unit to be Off and switch
c1 (D-E1) is closed.
– When winter program in use requires unit to be Off and switch
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 summer program in use requires unit to be On
– when summer program in use requires unit to be Off and switch
c1 (D-E1) is closed.
– when summer program in use requires unit to be off and switch
c1 (D-E1) is open.
• With with switch cs on winter (D-E1 closed)
mode is : – When winter program in use requires unit to be On
– When winter program in use requires unit to be off
• With with switch cs on summer (D-E2 closed)
mode is : – When summer program in use requires unit to be On
– When summer program in use requires unit to be off
C u r r e n t m o d e :
O N W i n t e r
M0.3
S e a s o n S w i t c h i n g
N O
M3.2
C u r r e n t m o d e :
O N
M0.3
C u r r e n t m o d e :
O F F
M0.3
S e a s o n S w i t c h i n g
W I N T E R
M3.2
C u r r e n t m o d e :
O N W i n t e r
M0.3
C u r r e n t m o d e :
O F F W i n t e r
M0.3
C u r r e n t m o d e :
O N S u m m e r
M0.3
C u r r e n t m o d e :
O F F S u m m e r
M0.3
S e a s o n S w i t c h i n g
F R . O U T S I D E T .
S e a s o n S w i t c h i n g
F R . R O O M T .
S e a s o n S w i t c h i n g
F R . S E A S O N S
S e a s o n S w i t c h i n g
S U M M E R
M3.2
S e a s o n S w i t c h i n g
F R . O U T S I D E T .
S e a s o n S w i t c h i n g
F R . R O O M T .
S e a s o n S w i t c h i n g
F R . S E A S O N S
C u r r e n t m o d e :
O N W i n t e r
M0.3
C u r r e n t m o d e :
O F F W i n t e r
M0.3
C u r r e n t m o d e :
O N S u m m e r
M0.3
C u r r e n t m o d e :
O F F S u m m e r
M0.3
S e a s o n S w i t c h i n g
F R C O N T R O L s s
M3.2
S e a s o n S w i t c h i n g
F R C O N T R O L s s
M3.2
To prevent hot air stratification during the heating stage it is possible to prevent the heating di-
scharge air temp. T°fHea from ever exceeding an established actual room temperature value.
To prevent condensation in the discharge air duct during the cooling stage it is possible to pre-
vent the cooling discharge air temp. T°fCoo from dropping below the actual room temperature by
more than a certain value
H e a t i n g L i m i t M a x
F l o w – R o o m : 1 0 c
M2.5
C o o l i n g L i m i t M a x
F l o w – R o o m : 7 c
M2.7

14
E 134 - XTU 614 C1 Eng. 22.11.10 AM REV. 03
We reserve the right to make changes without notice
COSTER
17. OUTSIDE TEMPERATURE COMPENSATION
Compensation functions are only enabled if the outside sensor B2 is connected.
Such functions can be:
• Compensation of desired discharge air heating and cooling temperatures;
• Summer compensation of desired room temperature required by cooling;
Desired temperature adjustment values,
resulting from compensation, are displayed in and
17.1 Climatic compensation of desired flow Heating and Cooling temperatures
This function can be used only if sensors B1 and B2 are connected and sensor B3 is not connected.
It is useful when the primary air system, in addition to ensuring air circulation, also has to provide
for external dispersions.
Desired discharge air temperature required by heating
The controller increases desired temp. when outside temperature drops,
according to settings:
• Heating Comp. : NO = function disabled
YES = function enabled
• Opt : xx c = design outside temp. : winter
• Fpt : xx c = design flow temp. : winter
Desired discharge air temperature required by cooling
The controller decreases desired temp. when outside temperature
increases, according to settings:
• Heating Comp. : NO = function disabled
YES = function enabled
• Opt : xx c = design outside temp. : summer
• Fpt : xx c = design discharge air temp. : summer
17.2 Summer compensation of desired room Cooling temperature
This function can be only used if sensors 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. OT-R T : xx c = maximum allowed difference between
outside and room temp.
C o o l T . R o o m
D e s i r . : 2 5 . 0 c ± 0 . 0
M0.7
S u m me r C o m p e n : N O
D i f f . O . T - R . T : 6 c
M2.10
H e a t i n g C o m p . : N O
P p t : – 1 0 c F p t : 5 0 c
M2.8
C o o l i n g C o m p . : N O
O p t : + 3 5 c F p t : 1 0 c
M2.9
D e t e c t o r s L a y o u t
1 2 – – – – – –
M3.1
D e t e c t o r s L a y o u t
1 2 3 – – – – –
M3.1
F l o w C o o l T .
D e s i r . : 2 5 . 0 c ± 0 . 0
M0.7
F l o w H e a t . T .
D e s i r . : 2 0 . 0 c ± 0 . 0
M0.5
F l o w H e a t . T .
C o m p e n s a t . : ± 0 0 . 0
M0.6
F l o w C o o l T .
C o m p e n s a t . : ± 0 0 . 0
M0.8
• With with switch cs on winter (D-E1 closed)
mode is : – When winter program in use requires unit to be On
– When winter program in use requires unit to be Off and switch
c1 (D-E1) is closed.
– When winter program in use requires unit to be Off and switch
c1 (D-E1) is open.
• With with switch cs on summer (D-E2 closed)
mode is : – When summer program in use requires unit to be On
– When summer program in use requires unit to be Off and switch
c1 (D-E2) is closed.
– When summer program in use requires unit to be Off
and switch c1 (D-E2) is open.
S e a s o n S w i t c h i n g
F R C O N T R O L s s + c 1
M3.2
S e a s o n S w i t c h i n g
F R C O N T R O L s s + c 1
M3.2
C u r r e n t m o d e :
O N W i n t e r
M0.3
C u r r e n t m o d e :
O F F W i n t e r
M0.3
C u r r e n t m o d e :
O N S u m m e r
M0.3
C u r r e n t m o d e :
O F F S u m m e r
M0.3

15
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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 in: 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 with the relative humidity as
measured by sensor B6, and calculates the humidification load value
Qhumi and for Dehumidification Qdehu according to deviations and the
parameters set:
• Prop. Band: – – . – % = Humidity Proportional Band in %
• Integral time: – – m = Humidity Integral Time in minutes
The Humidification load is always assigned to the Mu control output for an
adiabatic humidifier On-Off control, and can also be assigned to the Ys
control output for a 0...10 V– vapour humidifier control.
The Dehumidification Qdehu load can only be assigned to the Ys control
output for swimming pool dehumidification with outside air.
H u m i d i f i c a t i o n
D e s i r . : 5 0 % ± 0 0
M0.9
D e h u m i d i f i c a t i o n
D e s i r . : 6 0 % ± 0 0
M0.10
R e l a t i v e H u m i d i t y
P r o p . B a n d : ± 6 . 0 %
M2.11
R e l a t i v e H u m i d i t y
I n t e g r . T i m e : 6 m
M2.12
D e t e c t o r s L a y o u t
– – – – – 6 – 8
M3.1
19. PREHEATING OR DEW POINT CONTROL
The function is enabled only if sensor B4 is connected..
It can be used for :
• PREHEATING = control of pre-heater battery unit ac-
cording to humidification condensation temperature
through duct mounting sensor B4, installed downstream
of the humidification unit..
• DEW POINT = De-humification value compensation to
limit dew formation on swimming pool windows with
sensor B4 in contact with the glass.
19.1 Preheating temperature control
If sensor B3 or sensors B1 and B3 are connected, the con-
troller calculates the pre-heating temp T°pre according to
the following:
– Condensation curve calculated on the basis of actual
room temp. (t°r) and room humidity (h%a)
– Minimum value set in M0.12
– Manual adjustment in M0.13 if applicable
If only sensor B1 is connected, the controller calculates pre-
heating temp. T°pre according to the following.
– Minimum value set in M0.12
– Manual adjustment in M0.13 if applicable
The controller compares dew point temp. T°dp with the temp. measured by sensor B4, and calcu-
lates the load value for preheating Qpre according to the deviation detected.
19.2 Swimming 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 set in M0.12
– Manual adjustment in M0.13 if applicable
The controller compares dew point temp. T°dp with the temp. measured by
sensor B4, and calculates the reduction of the value required for dehumidifi-
cation H%Dehu according to the deviation detected..
P r e h e a t i n g T .
C a l c . : 1 6 . 0 c ± 0 . 0
M0.13
D e w p o i n t T .
C a l c . : 1 6 . 0 c ± 0 . 0
M0.13
D e h u m i d i f i c a t i o n
C o m p e n s a t . : ± 0 . 0
M0.11
D e t e c t o r s L a y o u t
– – – 4 – – – –
M3.1
U s e d e t e c t o r B 4
P R E H E A T I N G
M3.3
U s e d e t e c t o r B 4
D E W P O I N T

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We reserve the right to make changes without notice
COSTER
20. FROST PROTECTION TEMPERATURE CONTROL
The function is enabled only if sensor B7 is connected.
The controller compares the frost protection temp. entered with the temp.
measured by sensor B7, and calculates the load value Qaf according to
the deviation detected and the PI parameters.
The Qaf load value acts in priority with the Qpre load or Qhea load
(opening pre-heating or heating valve).
If the controller has switched off the Mp pump, when the Qaf load value exceeds the10% value the
controller turns it on again, and turns it off when it drops to 0%.
If the controller has switched on the Mv fan, when the Qaf load value reaches the 100% value the
controller turns off the Mv fan, and cancels the Ys air damper control signal (closing) ; when it drops
to 0%, the controller turns on the fan again and restores the air damper control signal.
D e s . F r o s t p : 7 . 0 c
A c t . F r o s t p : 3 5 . 0 c
M0.14
21. HEAT PUMP CONTROL
If the Air Handling Unit is composed of a direct-exchange heat
pump, output Y can be assigned the HT.P.HEA. winter function.
(diagramma)
The load QH.pmp replicates load Qhea exactly, the only difference
being that when outside temp. drops below the T°omin value, the
load QH.pmp is cancelled.
Y - W i n : H E A T P U M P
Y - S u m : C O O L I N G
M3.5
M2.17
M i n i m . O u t si d e T .
H e a t . p u m p : – – c
D e t e c t o r s L a y o u t
– – – – – – 7 –
M3.1

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We reserve the right to make changes without notice
COSTER
22. CONTROL OUTPUTS
22.1 Control output Y
The Y outputs can be configured as:
• Y - MODULATING = modulating control for 3-wire valves or con-
vertors of 3-wire signals into 0...10 V– direct
current or step controllers
2 STAGES = 2-stage On-Off control (1 ; 1+2) for solenoid val-
ves, pumps, humidifiers, burners, refrigerators
single or two stage heat pumps, 2 equal-load
electric batteries, etc.
3 STAGES = 3-stage On-Off control (1 ; 2; 1+2) for 2 unequal-
load electric batteries.
• Run time: xxx s = valve actuator run time. It only appears if control is MODULATING.
To output Y must be assigned the type of action (load) which it must perform. E.g.: Heating.
If Season Switching is enabled in M3.2, a different action can be assigned for each season.
e.g.: Y – Win: Preheating; Y – Sum: Cooling.
• Y - .....: PREHEAT = Preheating QPre
HEATING = Heating QHea
HTP HEA = Heating through heat pump QHea.P.Cal
COOLING = Cooling Qcoo
FROSTPROT. = Frostprotection Qfrp (antifreeze control through one valve controlled
by another controller)
OFF = Not used in current season
22.2 Mu adiabatic humidifier control output
Output Mu (8-9-10) uses the humidification Qhumi load to control the adiabatic
humidifier:
While operating : – when setting is ON (only if the fan control Mv is on,
and only in Winter if season switching is activated)
Off : – when setting is OFF
– in Summer, if season switching is activated
– when setting is ON, if the fan control Mv is off,
due to antifreeze temperature (B7)
22.3 Mv fan control output
The system’s fan Mv (output 13-14) is:
On : – when setting is ON
Off : – when setting is OFF
– when setting is OFF : when, for action of Frosprot temp. (B7), load value Qfrp exceeds
10%
22.4 Mp pump control output
The system’s pump Mp (output 11-12) is:
On : – when setting is ON
– when setting is OFF : when load value Qfrp exceeds 10%, due to frosprot temperature
(B7)
Off : – when setting is OFF
Y - M O D U L A T I N G
R u n t i m e : 1 2 0 s
M3.4
Y : P R E H E A T .
M3.5
Y - W i n : P R E H E A T .
Y - S u m : O F F

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We reserve the right to make changes without notice
COSTER
23. OUTPUT Ys
Output Ys with 0...10V– control signal is only enabled when the Mv fan is operating, and can be
used for:
– AIR DAMPERS TEMP. = Control air damper according to temperature
– HUMIDIFICATION = 0…10 V– vapor humidifiers control.
– DEHUMIDIFICATION = Control air damper for room dehumidification (swimming pools)
– RECUPERATOR = Heat recuperator control
23.1 Air damper control based on temperature comparison
When actual room temperature t°r exceeds the desired
value T°rHea, the controller starts with PI characteristic the
progressive opening of the outside air.
When the actual room temp. t°r exceeds the desired value
T°rCoo, and the outside temperature t°o exceeds the
actual room temperature t°r, the controller shuts off the
outside air by On-Off control.
23.2 0…10 V– control of vapour humidifiers
The controller converts the humidification load signal Qhumi into the Ys
output 0...10V– signal to control vapour humidifiers.
23.3 Air damper control for room dehumidification (swimming pools)
The controller converts the dehumidification load signal Qdehu into the Ys
output 0...10V– signal to control the mixing dampers and to use the outside
air to dehumidify the room.
23.4 Heat recuperator control
The recuperator is off (Ys signal = 0 V–) when:
– The outside temperature value t°o is comprised between
T°rhea and T°rCoo.
The recuperator is switched on (Ys signal = 10 V–) when:
– The outside temperature value t°o is below the actual room
temperature T°r and below the desired value T°rHea .
– The outside temperature value t°o is above the actual room
temperature T°r and above the desired value T°rCoo .
A signal converter is required to convert the 0...10V– signal into an On-Off control.
23.5 Minimum dicharge air temperature limit
In the case:
When actual discharge air temperature t°f drops below the minimum discharge
air value T°fmin the controller shuts outside air with a modulating action.
23.6 Minimum outside air
In the cases shown:
The minimum amount of outside air required to ensure air circulation can be controlled in two
different ways:
– directly through the controller display, or
– using a minimum air positioner Rs directly connected to the air damper actuator.
23.7 Rapid function
In the cases:
If the Rapid Function is enabled, when the controller is switched on (E1-D or E2-D closed) the air dam-
pers remain shut 0% until room temp. returns within the T°rHea and T°rCoo target value range.
Rapid Function deletes the value but not the setting for the minimum
positioner Rs.
Y s - C o n t r o l :
A I R D A M P E R
M3.6
D e t e c t o r s L a y o u t
– 2 3 – – – – –
M3.1
Y s - C o n t r o l :
R E C U P E R A T O R
M3.6
Y s - C o n t r o l :
D E H U M I D I F I C A T I O N
M3.6
Y s - O u t s i d e A i r
M i n i m u m : x x x %
M2.13
Y s - C o n t r o l :
D A M P . T E M
M3.6
Y s - C o n t r o l :
D A M P E R S T E M P E R A T
M3.6
Y s - C o n t r o :
D E H U M I D I F I C A T I O N
M3.6
D e t e c t o r s L a y o u t
– – – – – 6 – –
M3.1
D e t e c t o r s L a y o u t
– 2 3 – – – – –
M3.1
Y s - C o n t r o l :
D A M P . T E M
M3.6
Y s - C o n t r o l :
D E H U M I D I F I C A T I O N
M3.6
Y s - R a p i d F u n c t i o n
a c c e n s i o n e : S I
M2.14
Y s - O u t s i d e A i r
M i n i m u m : x x x %
M2.13
H e a t i n g F l o w
M i n : 1 8 c M a x : 5 0 c
M2.4
Y s - C o n t r o l :
H U M I D I F I C A T I O N
M3.6
D e t e c t o r s L a y o u t
– – – – – 6 – –
M3.1

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COSTER
24. SEASON SWITCHING
The controller switches the action of output Y and the position of season control Ycs depending on
the choice: NO; WINTER; SUMMER; BY cs CONTROL; BY cs + c1 CONTROL; AUTOM. BASED ON
OUTSIDE TEMP.; AUTOM. BASED ON SEASON;
• Without season switching :
– the action of output Y is according to setting in
– season control Ycs cannot be used
• Manual season switching through display:
Winter: – the action of output Y is according to setting in
– season control Ycs is on Winter: 7-6 = closed; 7-5 = open.
Summer : – the action of output Y is according to setting in
– season control Ycs is on Summer: 7-6 = open; 7-5 = closed.
• Season switching according to position of season switch cs (D-E1-E2).
– with D-E1 closed and D-E2 open: action of output Y and season control Ycs on
Winter
– with D-E1 open and D-E2 closed: action of output Y and season control Ycs on
Summer
– with D-E1 open and D-E2 open: control Y on OFF and season control Ysc on last
position assumed.
• Automatic season switching according to outside temp. (only if B2 is connected).
When outside temp. remains lower than
for a period exceeding
The controller switches the action of output Y and season control Ysc to Winter
When outside temp. remains lower than
for a period exceeding
The controller switches the action of output Y and season control Ycs to Summer
• Automatic season switching according to room temp. (only if B3 is connected).
When Heating load value Qhea is higher than 0% and the
Cooling load value Qcoo is 0%, the season control Ycs
switches to Winter.
When Heating load value Qhea is 0% and the Cooling
load value Qcoo is higher than 0%, the season control
Ysc switches to Summer.
• Automatic season switching according to season periods. In this case, the following conditions
may occur:
– Successive season periods :
Result: no intermediate periods
From 15.10 to 15.04 = Y control and Ycs season switch on Winter
From 16.04 to 14.10 = Y control and Ycs season switch on Summer.
– Shortened season periods: :
Result: intermediate periods with unit off
From 15.10 to 15.04 = Y control and Ycs season switch on Winter
From 16.04 to 14.05 = Y control on OFF and Ycs season switch on Winter
From 15.05 to 15.09 = Y control and Ycs season switch on Summer
From 16.09 to 14.10 = Y control on OFF and Ycs season switch on Summer
– Overlapping season periods :
Result: overlapping periods according to outside temperature
From 02.11 to 14.03 : = Y control and Ycs season switch on Winter
From 16.05 to 31.08 : = Y control and Ycs season switch on Summer.
From 15.03 to 15.05 and from 01.09 to 01.11 :
When outside temperature remains below temp.
for a period exceeding:
the controller switches Y control and Ycs season switch on Winter
when outside temperature stays above Summer Outside Temp.
for a period exceeding:
the controller switches Y control and Ycs season switch on Summer
S e a s o n S w i t c h i n g
F R . O U T S I D E T .
M3.2
O u t W i n t e r T . : 2 0 c
D e l a y : 2 4 h r s
M2.15
O u t S u m m e r T . : 2 5 c
D el a y : 4 h r s
M2.16
S e a s o n S w i t c h i n g
N O
M3.2
Y - W i n : XXXXXXXX
Y - S u m :
M3.5
Y - W i n :
Y - S u m : XXXXXXXX
M3.5
Y - : XXXXXXXX
M3.5
S e a s o n S w i t c h i n g
F R . R O O M T .
M3.2
S e a s o n S w i t c h i n g
W I N T E R
M3.2
S e a s o n S w i t c h i n g
S U M M E R
S e a s o n S w i t c h i n g
F R . S E A S O N S
M3.2
W i n t e r S e a s o n
F r : 1 5 . 1 0 t o : 1 5 . 0 4
M1.19
S u m m e r S e a s o n
F r : 1 6 . 0 4 t o : 1 4 . 1 0
M1.20
W i n t e r S e a s o n
F r : 1 5 . 1 0 t o : 1 5 . 0 4
M1.19
S u m m e r S e a s o n
F r : 1 5 . 0 5 t o : 1 5 . 0 9
M1.20
W i n t e r S e a s o n
F r : 0 1 . 0 9 t o : 1 5 . 0 5
M1.19
S u m m e r S e a s o n
F r : 1 5 . 0 3 t o : 0 1 . 1 1
M1.20
O u t S u m m e r T . : 2 0 c
D e l a y : 2 4 h r s
M2.15
O u t S u m m e r T . : 2 5 c
D el a y : 8 h r s
M2.16
S e a s o n S w i t c h i n g
F R . C O N T R O L s s
M3.2
S e a s o n S w i t c h i n g
F R . C O N T R O L s s + c 1

20
E 134 - XTU 614 C1 Eng. 22.11.10 AM REV. 03
We reserve the right to make changes without notice
COSTER
25. PROGRAMS & PERIODS WITH DATES
XTU 614 can start and shut down the air handling sites using:
– 25 24-hour programs
– 5 7-day programs
– 25 annual periods with dates
25.1 Assigning the program
If Season Switching is not required the program is assigned on a single page
If Season Switching is enabled, the program is assigned on
two separate pages, one for the Winter season and one for
the Summer season.
25.2 24-hour programs
Set the number of 24-hour programs to be used (1 to 25) in order to eliminate unused display
pages.
In each 24-hour program (24hr 1 ... 24hr 25) you can enter up a maximum of 6 start times (h1 ...
h6), assigning to each one of the following modes :
• ON : – output Y active
– system fan Mv on
– pump Mp on
• OFF : – output Y closed or off (if On-Off type)
– system fan Mv off
– pump Mp off
Period start times must be entered in increasing order.
Unused times (– – –) should be deleted by pressing the two + and – keys simultaneously..
No unused times (– – –) should be left between programmed times.
25.3 7-day programs
Enter the number of 7-day programs to be used (1 to 5) in order to eliminate unused display pages.
In each 7-day program you can assign to each day of the week one of the programs (24hr 1 ... 25);
ON; or OFF.
25.4 Annual periods
Each annual period, as defined by the period start and end dates, imposes an operating program
that replaces the one currently in use.
At the end of each annual period, the controller restores the normal program.
Enter the number of annual periods to be used, in order to eliminate unused display pages.
For each annual period, select the program to be used:
– 7-DAY 1...4; 24-HOUR 1...25; ON; OFF
Enter the data for each individual period:
• Per. 01 = selection of available periods
• Start : – NO = annual period not used
– 00 = annual period used; start time midnight
– 12 = annual period used; start time 12 o’clock noon
• from - - . - - t o - - . - - = day and month start and end of the annual period
For one-day periods set the same date as start and end .
To cancel annual period, press + and – keys simultaneously
25.5 Season periods
Season periods define the winter and summer seasons.
Enter the day and month of start and end of the winter season.
Enter the day and month of start and end of the summer season.
To cancel periods, press + and – keys simultaneously
For use of season periods, please see section 24. SEASON SWITCHING
25.6 Summer time
The controller can automatically change the current time of day at the beginning and end of the
daylight saving period.
– AUT = The change from BST to GMT and viceversa is automatic.
– MAN = you can set date different from that of European Community
To cancel the period, press + and – keys simultaneously
M1.16
H o w m a n y a n n u a l
p e r i o d s ? 0
M1.17
P r o g . P e r i o d 1
O F F
M1.18
A n n P 1 S t a r t N O
F r : - - . - - t o : - - . - -
M1.19
W i n t e r S e a s o n
F r : - - . - - t o : - - . - -
M1.21
B S T A U T
F r : 2 5 . 0 3 t o : 2 7 . 1 0
31.19
S u m m e r S e a s o n
F r : - - . - - t o : - - . - -
M1.2.7
D a y l y 1 h r 1 6 . 0 0
O N
M1.1
H o w m a n y d a y l y
P r o g r a m m e s ? 1
P r o g r a m
D A I L Y 1
M0.2
S e a s o n S w i t c h i n g
N O
M3.2
M1.8
H o w m a n y w e e k l y
P r o g r a m m e s ? 1
P r o g r a m S u m m e r
D A I L Y 1
M0.4
P r o g r a m W i n t e r
D A I L Y 1
M0.2
M1.9
W e e k 1 : M O N D A Y
D A Y L Y 1