Coster XTA 624 User manual

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We reserve the right to make changes without notice
COSTER
XTA 624 C1 Eng.
• Temperature control in air handling units
• Communication systems :
– C-Bus : XTA 624 Telemanagement optional;
to enable Telemanagement use the "C-Bus Plug-in" type ACB 400 C1 or later,
to be ordered separately as accessory.
• 24 V ~ power supply; DIN rail mounting
1. APPLICATION
XTA 624 is designed for temperature 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 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. OPERATION
The main features of XTA 624 are as follows:
• Two 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.
– flow temperature control (heating or cooling) with winter and summer compensation if desired
– pre-heating temperature control at a fixed value
• One 0...10 V– progressive output, configurable for:
– air mixing control based on temperature comparison or with minimum external air limit
– heat recuperator On-Off control according to room-external temperature comparison
• 2 pump control On-Off outputs accoring to output load
• Manual seasonal switching from a display or an external switch.
• Remote-controlled temperature setting adjustment
• Alarms for short and open detector circuits and for system and equipment malfunction.
• Programming by means of 25 24-hour programs, five 7-day programs, and 25 annual period programs
• Enabled for data transmission via C-Bus with local PCs or remote Telemanagement PC.
• Optional C-Bus transmission of data with local PCs or remote Telemanagement PC.
To enable data transmission and Telemanagement use the “C-Bus Plug-in” type ACB 400 C1 or later
To communicate locally with a PC use the test Plug-in type ACX 232
3. ACCESSORIES
No. Description Type Application range Sensing Code Data
element sheet
1 Duct flow air temperature detector STA 010 0…60 °C NTC 10 kΩ B1 –
1 Duct outside air temperature detector STA 001 –30…+40 °C NTC 1 kΩ B2 –
or wall outside air temperature detector SAE 001 –30…+40 °C NTC 1 kΩ B2 –
1 Duct extract air temperature detector STA 010 0…40 °C NTC 10 kΩ B3 –
or room air temperature detector SAB 010 0…40 °C NTC 10 kΩ B3 –
1 Duct pre-heating temperature detector STA 010 0…40 °C NTC 10 kΩ B4 –
1 Temperature set-point adjuster CDB 100 ± 5 °C – Rt° –
1 Outside air minimum distance positioner PCS 04 – – Rs –
Accessory for Telemanagement
1 Plug-in for communicating via C-Bus ACB 400 C1 – – –
E 136
22.11.10 AM
REV. 02
BUS
C
OPTIONAL
TEMPERATURE CONTROLLER FOR TWO-BATTERY
AIR HANDLING UNIT

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E 136 - XTA 624 C1 Eng. 22.11.10 AM REV. 02
We reserve the right to make changes without notice
COSTER
4. TECHNICAL DATA (default values in bold print)
• Electrical data
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 Electroth. Committee(CEI)
Data storage period 5 yars
Software Class A
• Mechanical data
Case DIN 6E Module
Mounting DIN 35 rail
Materials:
base NYLON
cover ABS
Room humidity
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
• Adjustment ranges
Heating (or cooling) temperatures:
desired room temp. (B3 or 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
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
5. OVERALL DIMENSIONS 6. FACIA
1 - Alphanumeric display
2 - + and – operating keys
3 - ← and→ operating keys
4 - Y1 output LED
5 - M1 pump LED
6 - Y2 output LED
7 - M2 pump LED
8 - Ys output LED
9 - Measurement alarm LED
10 - Microprocessor malfunction LED
11 - Plug-in type ACB 400 C1 for C-Bus communica-
tion
Preheating temperature (B4) 0…10…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) Bp amb x 0,5…10…20
Cooling temperatures Pb heat x 0,5…20
preheating (B4) Pb heat disch x 0,5…1…20
Air dampers (B2+B3) Pb room heat x 0,5…1…20
Valve stroke time (modulating) 0…10…255 min.
Y1, Y2 output control – modulating
– 2 stage
– 3 stage
Valve stroke time (modulating) 30…120…630 s
Ys output control 0…10 V–
Season switching: – manual (display)
– external control
M1, M2 pump Off control delay 0…20…99 min.
• 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. delay 2…30…255 min.
Room temp. diff. threshold (B3) 0,5…1…30 °C
Room temp. diff. delay 2…30…255 min.
Preheat temp. diff. threshold (B4) 1…5…99 °C
Preheat temp. diff. delay (B4) 2…5…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.
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456 37 8 10
9
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
11

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COSTER
Ss Win and c1 closed = On - Winter;
ss Sum and c1 open = On – Summer
c1 open = Off
Season switching (M2.2) must be:
through ss control
c1 closed = On; c1 open = Off
Possible Season switching (M2.2) modes:
No ; Winter ; Summer ; Based on Outside Temp.;
Based on Room Temp.; Based on Seasons
Always On (as supplied)
Possible Season switching (M2.2)modes:
No ; Winter; Summer; Based on Outside Temp.;
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 – Room or extract air temp. detector
B4 – Preheating temp. detector
ss – Season switch (eliminate D-E1 link)
Win = Winter, Sum = Summer.
M 1-2 – Pump On-Off control
Y 1-2 – 3-wire modulating controls
Ys – Air dampers or recuperator 0...10V– control
Rt° – Temp. set-point adjuster
Rs – Minimum outside air positioner
C-Bus – Transmission data via Telemanagement; C-Bus
is enabled using the Plug-in type ACB 400 C1
7.4 Use of D-E1-E2 Outputs – Examples
ss – Control through manual or centralized season switch or through
XTU 614-type controller.
c1 – on-off contact through timeswitch or through manual control or
through fan relay
Y .. : M O D U L A T I N G
R un T i m e : x x x s
M2.3.5
7.1 3-Wire Modulating Valve Control
7.2 Electric Battery Control
Y .. : 2 S T A G E S
M2.3.5
2 equal loads
Y .. : 3 S T A G E S
M2.3.5
Y .. : 2 S T A G E S
M2.3.5
7.3 Direct Expansion Battery Control
2 unequal loads
Y1-2.e – Electric batteries Y1-2.c – Direct expansion batteries (refrigerators)
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
9. WHERE TO PLACE DEVICES
9.1 Controller
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 in
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.
9.3 Outside temperature detector B2
STA 001 : It may be used in systems with constant outside air inflow. It must be installed upstream with respect to
the 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 bui-
lding, 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.
9.4 Room temperature or extract air detector B3
SAB 010 : environment : It must be installed in a spot that reflects the average temperature of a significant room
(e.g. living room) at a height of 1.5...1.6 m. above the floor, on an inside wall away from 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.
9.5 Preheating temperature detector B4
It must be installed downstream with respect to the humidifying unit, preferably downstream of the drop separator.
10. COMMUNICATION
10.1 C-Bus communication for telemanagement (for detailed information please see technical data sheet T 021)
XTA 624 provides :
– remote Telemanagement by when enabled by C-Bus Plug-in type ACB 400 C1
– local communication (e.g. setting via PC) when enabled with Test Plug-in ACX 232
Telemanagement is bidirectional, with one or more local PCs and/or the remote central PC via
PSTN.
Local communication is direct to a portable PC to be connected directly to the unit.
From PC or PCs it is possible to display and/or change :
– the data and values entered on display pages of the controller and those of configuration
dedicated exclusively to telemanagment (see 4.TECHNICAL DATA)
– operational status of plant components (pumps, auxiliaries in general)
– acquire alarms coming from boiler plant
– read the measurements of the detectors (temperatures : outside, flow, boiler, etc)
10.2 C-Bus electrical connection for local or remote Telemanagement
Each controller must be equipped with
the C-Bus Plug-in of the required type
for the controller in question
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 “CONVENIENCE KIT”.
If the PC has only USB inputs use a standard RS232 to USB conversion cable.
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 you could have dispersed currents, 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
–Convenience kit = KIT RS 232
The “Convenience kit” contains
the 2 cables & other useful ac-
cessories.

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COSTER
11. TEMPERATURE CONTROL – EXAMPLES
11.1 Room temperature control
B2 – Outside temp. detector (for compensation only)
B3 – Room or extract temperature detector
Rt° – Temperature set point adjuster (optional)
B1 – Flow temperature detector
B2 – Outside temperature detector (for compensation only)
B3 – Room or extract temperature detector
Rt° – Temperature set point adjuster (optional)
B1 – Flow temp. detector
B2 – Outside temperature detector (for compensation only)
Rt° – Temperature set point adjuster (optional)
11.2 Room temperature control with flow temperature limits
11.3 Flow temperature control
D e t e c t o r s L a y o u t
– 2 3 – 5
M2.1
D e t e c t o r s L a y o u t
1 2 3 – 5
M2.1
D e t e c t o r s L a y o u t
1 2 – – 5
M2.1
12. USE OF YS OUTPUT– EXAMPLES
12.1 Temperature comparison air damper optimization
12.2 Heat recuperator On-Off control
B2 – Outside temperature detector
B3 – Room or extract temperature detector
Ys – Progressive air damper control
Rs – Outside air min. distance positioner (optional)
B2 – Outside temp. detector
B3 – Room or extract temperature detector
Ys – Recuperator
U1 – 0...10 V– into On-Off signal converter
D e t e c t o r s L a y o u t
– 2 3 – – – – –
M2.1
Y s - C o n t r o l :
D A M P . T E M P E R A T U R E
M2.7
D e t e c t o r s L a y o u t
– 2 3 – – – – –
M2.1
Y s - C o n t r o l :
R E C U P E R A T O R
M2.7

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COSTER
13. USE OF Y1, Y2 OUTPUT – EXAMPLES
13.2 – 1 Heating modulating battery
– 1 Cooling modulating battery
B1 – Flow temp. detector
B2 – Outsidetemperature detector (for compensation)
B3 – Room or extract temperature detector
B4 – Pre-heating temperature detector
M1 – Pre-heating pump
M2 – Post-heating pump
Rt° – Temperature set point adjuster (optional)
Y1 – Heating modulating control
Y2 – Cooling modulating control
D e t e c t o r s L a y o u t
1 2 3 4 5
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
M2.3
Y 1 : P R E H E A T I N G
M2.4
Y 2 : M O D U L A T I N G
R u n T i m e : x x x s
M2.5
Y 2 : H E A T I N G
M2.6
D e t e c t o r s L a y o u t
1 2 3 4 5
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
M2.3
Y 1 : H E A T I N G
M2.4
Y 2 : M O D U L A T I N G
R u n T i m e : x x x s
M2.5
Y 2 : C O O L I N G
M2.6
B1 – Flow temperature detector
B2 – Outside temperature detector (for compensation)
B3 – Room or extract temperature detector
M1 – Heating pump
M2 – Cooling pump
Rt° – Temperature set point adjuster (optional)
Y1 – Heating modulating control
Y2 – Cooling modulating control
13.1 – 1 Preheating modulating battery
– 1 Post-heating modulating battery
– 1 Humidifying On-Off unit (controlled from outside the controller)
13.3 – 1 Winter pre-heating, summer cooling modulating battery
– 1 Winter post-heating modulating battery
– 1 Humidifying On-Off unit (controlled from outside the controller)
B1 – Flow temperature detector
B2 – Outside temperature detector (for compensation)
B3 – Room or extract temperature detector
B4 – Winter pre-heating temperature detector
M1 – Winter pre-heating, summer cooling pump
M2 – Winter post-heating pump
Rt° – Temperature set point adjuster (optional)
Y1 – Winter pre-heating, summer
cooling modulating control
Y2 – Winter post-heating modulating control
D e t e c t o r s L a y o u t
1 2 3 4 5
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
M2.3
Y 1 - W i n : P R E H E A T .
Y 1 - S u m : C O O L I N G
M2.4
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 2 - W i n : H E A T I N G
Y 2 - S u m : O F F
M2.6
S e a s o n s w i t c h i n g
N O
M2.2
S e a s o n s w i t c h i n g
N O
M2.2
S e a s o n s w i t c h i n g:
X X X X X X X X X
M2.2

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COSTER
13.4 – 1 Winter heating modulating battery
– 1 Summer cooling direct expansion On-Off battery
– 1 Humidifying On-Off unit (controlled from outside the controller)
B1 – Flow temperature detector
B2 – Outside temperature detector (for compensation)
B3 – Room or extract temperature detector
M1 – Heating pump
Rt° – Temperature set point adjuster (optional)
Y1 – Winter heating modulating control
Y2 – Summer heating On-Off control
D e t e c t o r s L a y o u t
1 2 3 – 5
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
M2.3
Y 1 - W i n : H E A T I N G
Y 1 - S u m : O F F
M2.4
Y 2 : 2 S T A G E S
M2.5
Y 2 - W i n : O F F
Y 2 - S u m : C O O L I N G
M2.6
S e a s o n s w i t c h i n g
X X X X X X X X X
M2.2
13.5 – 1 Winter heating electric On-Off battery
– 1 Summer cooling direct expansion On-Off battery
– 1 Humidifying On-Off unit (controlled from outside the controller)
B1 – Flow temperature detector
B2 – Outside temperature detector (for compensation)
B3 – Room or extract temperature detector
M1 – Heating pump
Rt° – Temperature set point adjuster (optional)
Y1 – Winter heating On/Off control
Y2 – Summer cooling On-Off control
D e t e c t o r s L a y o u t
1 2 3 – 5
M2.1
Y 1 : 2 S T A G E S
M2.3
Y 1 - W i n : H E A T I N G
Y 1 - S u m : O F F
M2.4
Y 2 : 2 S T A G E S
M2.5
Y 2 - W i n : O F F
Y 2 - S u m : C O O L I N G
M2.6
S e a s o n s w i t c h i n g
X X X X X X X X X
M2.2

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COSTER
14. OPERATION
XTA 624 is a microprocessor-operated digital controller for temperature control in air handling units
composed of: 2 units with 3-wire or 1, 2 or 3-stage On-Off modulating control.
The units can have the following functions: Preheating; Heating; Cooling.
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.
15. TEMPERATURE CONTROL
Temperature control can operate either with:
• Room or extract air detector B3 only:
Fixed point room Heating and Cooling temperature control, or:
• Discharge air detector B1 only:
Fixed point flow Heating and Cooling temperature control, or:
• Room or extract air detector B3 and discharge air detector B1:
Flow Heating and Cooling temperature control according to room temperature deviation
15.1 Desired temperatures
Desired temperatures for heating and cooling
Can be set in and if B3 or B1 and B3 are connected
or in and if only B1 is connected
If the set point adjuster Rt° is connected, these values can be changed remotely. The value of the
change expressed in ± °C is displayed next to the set values.
15.2 Proportional band and Integral Time
Basic temperature control parameters, Proportional Band and Integral Time, refer to heating
control (Room: if B3 only or B1 + B3 are connected, or Flow: if B1 only is connected) and can be
changed through the ADJUSTMENT menu.
The Proportional Band parameter (in ± °C) is used for other temperature settings through modifiable
multipliers that adapt it to the different types of controls (Cooling; Preheating; 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 room heating x 0.5 (= ±5 °C)
Pb Preheating = Pb flow heating x 1.0 (= ±10 °C)
Pb Air damper= Pb room heating x 1.0 (= ±2 °C)
dT recuperator = Pb room heatingx 1.0 (= 2 °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.
T e m p e r . R o o m
P r o p . B a n d : 2 . 0 c
M2.1
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
– – 3 – – –
M3.1
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
1 – 3 – – –
H e a t . T . R o o m
D e s i r . : 2 0 . 0 c ± 0 . 0
M0.3
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
M0.5
H e a t . T . F l o w
D e s i r . : 2 5 . 0 c ± 0 . 0
D e t e c t o r s L a y o u t
– – – – 5
M3.1
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
Y .. : H E A T I N G
M3.4.6
Y .. - W i n : H E A T I N G
Y .. - S u m : C O O L I N G
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 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

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COSTER
15.3 Control 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.
15.4 Control 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 = Heating flow temp. min
and max values determine the PbHea propor-
tional 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 = Cooling flow temp. min
and max values determine the PbCoo propor-
tional band’s range.
The controller compares desired flow temperatures for
Heating T°minHea 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.
When the manipulation of air dampers (M3.7) is foreseen the operation is
optimised.
If under Ambient Authority (M2.5 bis) a value other than zero
has been set, the controller re-calculates the desired minimum
heating flow temperature (T°minHea) at the moment in which
the measured room temperature is between T°minHea) at the
moment in which the measured room temperature is between
T°Hea and T°Coo
Example: values set T°minHea: 18°C, T°Hea: 20°C, T°Coo: 25°C, Am-
bient 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°min Hea).
If Ambient Authority: 0°C the function is excluded
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
M0.3
C o o l . T . R o o m
D e s i r . : 2 5 . 0 c ± 0 . 0
M0.5
H e a t . T . R o o m
D e s i r . : 2 0 . 0 c ± 0 . 0
M0.3
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
M0.5
C o o l . T . F l o w
D e s i r . : 2 5 . 0 c ± 0 . 0
C o o l i n g F l o w
M i n : 8 c M a x : 2 5 c
M2.5
0%
100%
Q
T°Hea
PbHea
50%
–+t°
T°Coo
PbCoo
QHea QCoo
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
M2.5 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
M2.5 bis
Y s - C o n t r o l :
D A M P T E M P E R A T U R E
M3.7

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We reserve the right to make changes without notice
COSTER
16. 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 tem-
peratures;
• Summer compensation of desired room or flow Cooling
temperatures;
16.1 Compensation of desired flow Heating and Cooling temperatures
This function can only be 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
The controller decreases desired temp. when outside temperature increases,
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
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
M2.7
C o o l T . F l o w
D e s i r . : 2 5 . 0 c ± 0 . 0
M0.5
H e a t i n g C o m p . : N O
O p t : – 1 0 c F p t : 5 0 c
M2.6
S e a s o n S w i t c h i n g
1 2 – – –
M3.1
H e a t T . F l o w
D e s i r . : 2 0 . 0 c ± 0 . 0
M0.3
F l o w H e a t T .
C o m p e n s a t : ± 0 0 . 0
M0.4
F l o w C o o l T .
C o m p e n s a t : ± 0 0 . 0
M0.6
C o o l T . R o o m
C o m p e n s a t . : ± 0 0 . 0
M0.6
15.5 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 (see paragraph 24).
– status of season switching (ss) and/or the control c1 (terminals D-E1-E2).
Examples :
• With mode is : ON – when contact c1 (D-E1) is closed
OFF – when contact c1 (D-E1) is open
• With mode is : ON winter – when contact c1 (D-E1) is closed
OFF winter – when contact c1 (D-E1) is open
• With mode is : ON Summer – when contact c1 (D-E1) is closed
OFF Summer – when contact c1 (D-E1) is open
• With with ss contact on Winter (D-E1 closed)
mode is : ON Winter - when contact c1 (D-E1) is closed
OFF Winter - when contact c1 (D-E1) is open
• With with ss contact on Summer (D-E2 closed)
mode is : ON Summer - when contact c1 (D-E2) is closed
OFF Summer - when contact c1 (D-E1) is open
C u r r e n t m o d e :
O N W i n t e r
M0.2
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
S e a s o n S w i t c h i n g
N O
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
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
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

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We reserve the right to make changes without notice
COSTER
18. OUTPUT Y1, Y2
Outputs Y1 and Y2 can be configured as:
• Y.. - MODULATING = modulating control for 3-wire valves or 3-
wire signal converters into 0...10 V- or step
controllers.
2 STAGE = 2-stage On-Off control (1 ; 1+2) for solenoid
valves, pumps, humidifiers, burners, refri-
gerators, 2 equal-load electric batteries,
etc.
3 STAGE = 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 M2.2, a different action can be assigned for each season.
E.g.: Y1 – Win: Heating; Y1 – Sum: Cooling.
• Y1 - .....: PREHEAT = Preheating (only if B4 is configured)
HEATING = Heating
COOLING = Cooling
OFF = Not used in current season
• Y2 - .....: PREHEAT = Preheating (only if B4 is configured)
HEATING = Heating
COOLING = Cooling
OFF = Not used in current season
Y .. - M O D U L AT I N G
R u n T i m e : 1 2 0 s
M3.3.5
Y 1 : H E A T I N G
M3.4
Y 1 - W i n : H E A T I N G
Y 1 - S u m : H E A T I N G
Y 2 : C O O L I N G
M3.6
Y 2 - W i n : C O O L I N G
Y 2 - S u m : C O O L I N G
17. PREHEATING TEMPERATURE CONTROL
The function is only enabled if detector B4 is connected. It can be used for the following purpo-
ses:
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.
S e a s o n S w i t c h i n g
– – – 4 –
M3.1
P r e h e a t i n g T .
D e s i r . : 1 8 . 0 c
M0.7
16.2 Summer compensation of desired room Cooling temperature
This function can only be 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.
• Summer Comp. : NO = function disabled
YES = function enabled
• Diff. T - 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
M0.5
S u m m e r C o m p e n : N O
D i f f . T - R . T : 6 c
M2.8
S e a s o n S w i t c h i n g
1 2 3 – – –
M3.1

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COSTER
20. SEASON SWITCHING
The controller switches the action of output Y1 and Y2 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
– output D-E1 can be used for Remote Control On-Off
with D-E1 closed: outputs Y1, Y2 controlling
with D-E1 open: outputs Y1, Y2 closing
• Manual season switching through display:
Winter: – the action of output Y1, Y2 is according to setting in
Summer : – the action of output Y1, Y2 is according to setting in
• Season switching according to position of season switch cs (D-E1-E2).
– with D-E1 closed and D-E2 open: action of output Y1, Y2 on Winter
– with D-E1 open and D-E2 closed: action of output Y1, Y2 on Summer
S e a s o n S w i t c h i n g
N O
M2.2
S e a s o n S w i t c h i n g
W I N T E R
M2.2 Y .. - W i n : XXXXXXXX
Y .. - S u m :
M2.4.6
S e a s o n S w i t c h i n g
S U M M E R
M2.2
Y .. - W i n :
Y .. - S u m : XXXXXXXX
M2.4.6
Y .. - : XXXXXXXX
M2.4.6
19. OUTPUT Ys
Output Ys with 0...10 V– control signal can be used for:
• AIR DAMPER TEMP. = Temp. comparison air damper control
RECUPERATOR = Heat recuperator control
19.1 Air 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
room temperature t°r, the controller shuts outside air through
the On-Off control.
19.2 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 on (Ys signal = 10 V–) when:
– The outside temperature value t°o is lower than actual
room temperature T°r and lower than the target T°rHea
value.
– The outside temperature value t°o is higher than actual
room temperature T°r and higher than the target T°rCoo
value.
A signal converter is required to transform the 0...10V– signal into an On-Off control.
19.3 Minimum flow temperature limit
In the case shown :
When actual flow temperature t°f drops below the minimum flow value T°fmin
the controller shuts off outside air with a modulating action.
19.4 Minimum outside air
In the case shown :
The minimum amount of outside air required to ensure air circulation can be controlled in two
different ways:
– directly through the controller display
– using a minimum air positioner Rs directly connected to the air damper actuator.
Y s - C o n t r o l :
D A M P . T E M P E R A T U R E
M2.7
Y s - C o n t r o l :
R E C U P E R A T O R
M2.7
Y s - O u t s i d e a i r
M i n i m u m : x x x %
M1.9
Y s - C o n t r o l :
D A M P . T E M P E R A T U R E
M2.7
Y s - C o n t r o l :
D A M P . T E M P E R A T U R E
M2.7
H e a t i n g F l o w
M i n : 1 8 c M a x : 5 0 c
M1.4
t°o = t°r
t°o
+
0
10
–
t°o > t°r
Ys
T°rHea T°rHea
t°o = t°r t°o < t°r
dTrec dTrecdTrec dTrec
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

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COSTER
• 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%.
When Heating load value Qhea is 0% and the Cooling load
value Qcoo is higher than 0%
.
• 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 = Y1 and Y2 control
From 16.04 to 14.10 = Y1 and Y2 control.
– Shortened season periods :
Result: intermediate periods with unit off
From 15.10 to 15.04 = Y1 and Y2 control
From 16.04 to 14.05 = Y1 and Y2 control in OFF
From 15.05 to 15.09 = Y1 and Y2 control
From 16.09 to 14.10 = Y1 and Y2 control IN OFF
– Overlapping season periods:
Result: overlapping periods according to outside temperature
From 02.11 to 14.03 : = Y1 and Y2 control
From 16.05 to 31.08 : = Y1 and Y2 control
From 15.03 to 15.05 and from 01.09 to 01.11 :
When outside temperature remains below temperature
for a period exceeding:
the controller switches Y1 and Y2 control
when outside temperature stays above Summer Outside Temp.
for a period exceeding:
the controller switches Y1 and Y2 control
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
F R . R O O M T .
M3.2
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
Win.
Sum.
100% 100%0%0% 0% Q
QHea
QCoo

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We reserve the right to make changes without notice
COSTER
21. 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
21.1 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.
21.2 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 Y1 and Y2 active
• OFF : – output Y1 and Y2 closed or off (if On-Off type)
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.
21.3 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.
21.4 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
21.5 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
21.6 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

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COSTER
23. COMPLEMENTARY FUNCTIONS
23.1 Password
Password selection and enabling. The command disables the use of keys + and –, so that data
cannot be modified. Enter the number (1900... 1999) using the + and – keys. To delete password
press + and – simultaneously until the dashes reappear.
Password selection and enabling. The command disables the use of keys + and –, so that data
cannot be modified. Enter the number (1900... 1999) using the + and – keys. To delete password
press + and – simultaneously until the dashes reappear.
23.2 Site name
Site name as it appears on the first display page.
Each dash can be replaced with a letter (A...Z) or a number (0...9), using the + and – keys.
The → key is used to position the cursor.
23.3 Display of values and operating data
The controller displays all values measured by the detectors as well as all data that help understand
the system’s operating status:
• Actual room temperature (if B3 is connected) or flow temperature (if only B1 is connected).
• Calculated flow temperature based on Heating setting (if B3 and B1 are connected).
• Calculated flow temperature based on Cooling setting (if B3 and B1 are connected).
• Actual temperature measured by detector B3 (only if B3 and B1 are connected).
• Actual Pre-heating temperature, only if B4 is connected
• Actual outside temperature (only if B2 is connected).
• Output Y1 load value: Preheat. or Heat. or Cool.
• Output Y2 load value: Preheat. or Heat. or Cool.
• Output Ys load value: DampTemp. or Recuper.
23.4 Data recording
Every hour and with every mode change the controller stores a set of data indicating operating
status:
– Current date and time, type of recording (new hour or mode change)
– Current mode: On or Off; current season: Winter or Summer.
– Controller desired and calculated values
– Values measured by the detectors connected
– Outputs Y1, Y2 load value.
The controller is able to store 32 complete recordings, and the latest recording causes the oldest to
be deleted. If the display is not on page 1, the controller will perform the new hour recordings, but not
the mode change recordings, as it assumes that changes are being made on adjustment data.
Recordings can only be viewed from the Telemanagement computer.
M2.12
P a s s w o r d c h o i c e
- - - -
M2.13
S i t e N a m e
- - - - - - - - - -
P a s s w o r d c h o i c e
- - - -
M0.1
S i t e - - - - - - - - - - - -
R o o m T . : 2 0 . 0 c
M0.8
C a l c u l a t e d F l o w
C o o l i n g T . : 2 2 . 0 c
M0.11
O u t s i d e T . : – 2 . 0 c
M0.12
Y 1 - P R E H E A T . : 1 0 0 %
Y 2 - C O O L I N G : 1 0 0 %
M0.9
C a l c u l a t e d F l o w
C o o l i n g T . : 3 5 . 0 c
M0.10
F l o w T . : 2 0 . 0 c
P r e h e a t i n g : 1 5 . 0 c
22. M1, M2 PUMP CONTROLS
The controller controls M1 pump output depending on control output Y1 load, and M2 pump output
depending on control output Y2 load:
– Pump on with load over 0%
– Pump off with load equal to 0 after delay time D e l a y O f f M 1 : x x m
D e l a y O f f M 2 : x x
m
M1.10
M0.12
Y s - D A M P . T E M : 1 0 0 %

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COSTER
25. SYSTEM STARTUP TEST
The test must be carried out once installation is completed and the wiring and configuration have
been executed and checked.
Using the + and – keys, select:
• output to be tested:
– Y1 MODUL. or Y1 2 STAGES or Y1 3 STAGES: depending on M2.3 setting .
– Y2 MODUL. or Y2 2 STAGES or Y2 3 STAGES: depending on M2.5 setting .
– PUMP M1 ;
– PUMP M2 ;
– Ys ;
• status :
– with Y...MODUL. : IDLE ; CCLOSES ; OPEN
– with Y.. 2 STAGES : ON 1 ; ON 1+2 ; OFF.
– with Y.. 3 STAGES : ON 1 ; ON 2 ; ON 1+2 ; OFF.
– with Ys : 0 VOLT ; 5 VOLT ; 10 VOLT.
– with PUMP M1 and PUMP M2 : ON ; OFF.
Check results.
M3.1
O u t p u t : Y 1 M O D U L .
S t a t u s : I D L E
24. ALARMS
The controller processes two types of alarms:
– alarms related to functional irregularities affecting the controller and the controlled systems
(LED 6.10)
– alarms related to short and open detector circuits (LED 6.8)
Alarms are signaled by LEDs located on the controller’s front panel. On the display page alarms are
identified by a letter “A” flashing alternately to the number corresponding to the relevant alarm.
Alarms can be transmitted to a local and/or a central telemanagement computer through the C-Bus
connection.
24.1 Functional alarms
Functional alarms occur when there is a continuing deviation between actual and desired measures.
These alarms do not affect the controller’s proper operation.
“By default” all alarms are disabled except clock alarm (8)
Use the + and – keys to enable desired alarms, entering numbers in place of the dashes.
Number flashing = the alarm is on
IAlarm limit values and delays can only be changed via computer.
Types and reasons of alarms:
1 = flow temperature difference (if only B1 is connected)
–for actual temp. lower than T°fHea when Y..: Heating
or higher than T°fCoo when Y..: Cooling
3 = room temperature difference (if B3 is connected)
–for actual temp. lower than T°rHea when Y..: Heating
or higher than T°rCoo when Y..: Cooling
4 = preheating temperature difference (if B4 is connected and when Y..: Pre-heating)
– for actual temp. lower than desired value
8 = internal clock cannot be disabled
– when the clock assumes inconsistent values
24.2 Detector alarms
Detector alarms occur when there is a short circuit or open circuit affecting the connected de-
tectors.
The effect of alarm situations is delayed by one minute.
By default” all alarms are disabled.
Use the + and – keys to enable desired alarms, entering numbers in place of the dashes.
Types and effects of alarms:
1 = flow temp. detector (B1): valve stops where it is
2 = outside temp. detector (B2): valve stops where it is
3 = room temp. detector (B3): valve stops where it is
4 = preheating temp. detector (B4): valve stops where it is
M2.10
A l a r m s F u n c t i o n .
– – – 8
M2.11
A l a r m s D e t e c t o r
– – – –

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COSTER
Keys for scrolling the display pages and positioning the cursor � on adjustable data on the pages.
The adjustable data, in the following descriptive tables of display pages are highlighted by
By pressing these keys together, or in any event after 15 minutes, the first page returns to the display
Keys forr : – adjusting the values highlighted by the cursor �
– displaying the configuration options of a function, e.g. : or
– switch directly from one menu (block of pages) to another.
S e a s o n S w i t c h i n g
W I N T E R
S e a s o n S w i t c h i n g
S U M M E R
S i t e - - - - - - - - - - - -
R o o m T . : 2 0 . 0 c
–+
26. SEQUENCE OF DISPLAY PAGES (the data and functions are those set at factory)
H e a t T . R o o m
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
F l o w H e a t T .
C o m p e n s a t . : ± 0 0 . 0
C o o l T . R o o m
C o m p e n s a t . : ± 0 0 . 0
C u r r e n t m o d e :
O N
X T A 6 2 4 E n g .
V e r s . x x
S u m m e r T i me
F r : 2 6 . 0 3 t o : 2 8 . 1 0
1 2 . 1 8 M O N D A Y
1 0 . 0 3 . 0 0 G M T
Y 1 - H e a t i n g . : 1 0 0 %
Y 2 - C o o l i n g . : 1 0 0 %
O u t s i d e T . : – 2 . 0 c F l o w T . : 2 2 . 0 c
P r e h e a t T . : 1 5 . 0 c
C a l c u l a t e d F l o w
C o o l i n g T . : 3 5 . 0 c
C a l c u l a t e d F l o w
H e a t i n g T . : 2 2 . 0 c
P r e h e a t i n g T .
D e s i r . : 1 8 . 0 c
Y s - O u t s i d e A i r
M i n i m u m : 0 %
H e a t i n g F l o w
M i n : 1 8 c M a x : 5 0 c
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
P b F l o w =
P b R o o m x 5 . 0
+
T E C H I N I C A L P A G E S
P R E S S + K E Y
S i t e n a m e
- - - - - - - - - -
P a s s w o r d c h o i c e
- - - -
A l a r m s D e t e c t o r
– – – –
A l a r m F u n c t i o n s
– – – – 8
A d d r e s s : - - -
G r o u p : -
S e n d A l a r m s : N O
P a s s W T e l e m a n : N O
Y 2 - W i n : C O O L I N G
Y 2 - S u m : C O O L I N G
Y 2 : M O D U L A T I N G
R u n T i m e : 1 2 0 s
Y 1 - W i n : H E A T I N G
Y 1 - S u m : H E A T I N G
Y 1 : M O D U L A T I N G
R u n T i m e : 1 2 0 s
D e t e c t o r s L a y o u t
– – – – –
S e a s o n S w i t c h i n g
N O
T e m p e r . R o o m
P r o p . B a n d : ± 2 . 0 c
T e m p e r . R o o m
I n t e g r . T i m e : 1 0 m
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
C o o l i n g F l o w
M i n : 8 c M a x : 2 5 c
H e a t i n g C o m p . : N O
O p t : – 1 0 c F p t : 5 0 c
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
S u m m e r C o m p e n : N O
D i f . O . T – R . T : 6 c
–
+
C h o i c e M e n u + / –
C O N F I G C O N T R O L L E R
M3.
C h o i c e M e n u + / –
A D J U S T M E N T
M2.
S i t e - - - - - - - - - - - -
R o o m T . : 2 0 . 0 c
M0.
C h o i c e M e n u + / –
T E S T I N G
M4.
O u t p u t : Y 1 M O D U L .
S t a t u s : I D L E
+
–
Y s - D a m p . T e m : 1 0 0 %
D e l a y O f f M 1 : 2 0 m
D e l a y O f f M 2 : 2 0 m
P b C o o l i n g =
P b H e a t i n g x 0 . 5
Y s - C o n t r o l :
D A M P . T E M P E R A T U R E
H o w m a n y d a i l y
p r o g r a m m e s ? 1
D a i l y 1 h r 1 6 . 0 0
O N
D a i l y 1 h r 6 2 2 . 0 0
O F F
W e e k 1 : M O N D A Y
D A I L Y 1
W e e k . 1 : S U N D A Y
D A I L Y 1
H o w m a n y a n n u a l
p e r i o d s ? 0
P r o g r . P e r i o d 1
O F F
A n n P 1 s t a r t N O
F r - - . - - t o - - . - -
W i n t e r S e a s o n
F r 1 5 . 1 0 t o 1 5 . 0 4
B S T A U T
F r 2 6 . 0 3 t o 2 8 . 1 0
+
C h o i c e M e n u + / –
T I M E S & P E R I O D S
M1.
H o w m a n y w e e k l y
p r o g r a m m e s ? 1
S u m m e r S e a s o n
F r 1 5 . 1 0 t o 1 5 . 0 4
–
P b D a m p e r s =
P b H e a t R o o m x 1 . 0
O u t W i n t e r T . : 2 0 c
D e l a y : 2 4 o r e
O u t S u m me r T . : 2 5 c
D el a y : 4 h r s
C B U S s p e e d
1 2 0 0 b p s

18
E 136 - XTA 624 C1 Eng. 22.11.10 AM REV. 02
We reserve the right to make changes without notice
COSTER
M0. NORMAL USE
Ref. Display Description Notes Sect.
S i t e - - - - - - - - - - - -
R o o m T . : 2 0 . 0 c
M0.1Site name.
Actual temperature
22.2
Set in M2.13
Roon temp. : if B3 or B1 and B3 are connected
Floow temp. : if only B1 is connected
C u r r e n t m o d e :
O N W i n t e r
M0.2Current mode : – ON; OFF.
– ON Winter ; OFF Winter.
– ON Summer ; OFF Summer.
15.5
Mode is determined by Season Switching (M2.2)
and output D-E1-E2
H e a t T . R o o m
D e s i r . : 2 0 . 0 c ± 0 . 0
M0.3Required heating temperature and adjustment
through set point adjuster Rt° (only if configured)
15.1
Displayed if B3 or B1 and B3 are connected, and
if M2.4 or M2.6 setting is HEATING
Displayed only if B1 is connected, and if M2.4 or
M2.6 setting is HEATING
H e a t T . F l o w
D e s i r . : 2 0 . 0 c ± 0 . 0
F l o w H e a t T .
C o m p e n s a t . : ± 0 0 . 0
M0.4Compensation of heating flow temperature as
calculated by the controller
16.
Displayed if B1 and B2 are connected and B3
is not connected, and if M2.4 or M2.6 setting is
HEATING
C o o l . T . R o o m
D e s i r . : 2 5 . 0 c ± 0 . 0
M0.5Required cooling temperature and adjustment
through set point adjuster Ht° (only if configured)
15.1
C o o l . T . F l o w
D e s i r . : 2 5 . 0 c ± 0 . 0
Displayed if B3 or B1 and B3 are connected, and
if M2.4 or M2.6 setting is COOLING
Displayed if only B1 is connected, and if M2.4 or
M2.6 setting is COOLING
C o o l . T . F l o w
C o m p e n s a t . : ± 0 0 . 0
M0.6Compensation of cooling temperature as calculated
by the controller
16.
Displayed if B2 and B3 or B1, B2 and B3 are con-
nected, and if M2.4 or M2.6 setting is COOLING
Displayed if B2 with B1 only is connected, and if
M2.4 or M2.6 setting is COOLING
C o o l . T . F l o w
C o m p e n s a t . : ± 0 0 . 0
P r e h e a t i n g T .
D e s i r . : 1 8 . 0 c
M0.7Desired Preheating temperature 17.
Displayed if B4 is connected, and if M2.4 or M2.6
setting is PREHEATING
C a l c u l a r e d F l o w
H e a t i n g T . : 2 2 . 0 c
M0.8Calculated flow temperature based on Heating
control
22.3
Displayed if B1 and B3 are connected, and if M2.4
or M2.6 setting is HEATING
C a l c u l a r e d F l o w
C o o l i n g T . : 3 5 . 0 c
M0.9Calculated flow temperature based on Cooling
control
22.3
Displayed if B1 and B3 are connected, and if M2.4
or M2.6 setting is COOLING
F l o w T . : 2 2 . 0 c
P r e h e a t T . : 1 5 . 0 c
M0.10 Actual flow temp. as measured by B1
Preheating temp. as measured by B4
22.3
Flow T.: Displayed if B1 and B3 are connected
Preheat. T.: Displayed if B4 is connected
Y 1 - H e a t i n g . : 1 0 0 %
Y 2 - C o o l i n g . : 1 0 0 %
M0.12 Value of load assigned to output Y1
Value of load assigned to output Y2
22.3
Y1 - Y2 : PREHEAT; HEATING; COOLING; OFF
1 2 . 1 8 M O N D A Y
1 0 . 0 3 . 0 0 G M T
M0.14 Setting: time of day, day of week and date
Current time: GMT, BST
For data recording only.
Dates for BST (daylight saving time) to be set in
M0.15
S u m m e r T i m e
F r : 2 6 . 0 3 t o : 2 8 . 1 0
M0.15 BST (daylight saving time) start and end dates For data recording only.
X T A 6 2 4
V e r s . x x
M0.16 Controller ID data
O u t s i d e T . : – 2 . 0 c
M0.11 Outside temp. as measured by B2 22.3
Outside t.: Displayed if B2 is connected
Y s - D A M P . T E M : 1 0 0 %
M0.13 Value of load assigned to output Ys 22.3
Ys : DAMP.TEM.; RECUPERATOR

19
E 136 - XTA 624 C1 Eng. 22.11.10 AM REV. 02
We reserve the right to make changes without notice
COSTER
T e m p e r . R o o m
P r o p . B a n d : ± 2 . 0 c
M2.1Heating proportional band in ± °C.
If B3 or B1 and B3 are connected
15.2
Based on this value the controller derives other
functions’ proportional bands using the multipliers
set in the EQUIPMENT CONFIGURATION menu
T e m p e r . F l o w
P r o p . B a n d : ± 1 0 . 0 c
If only B1 is connected
T e m p e r . R o o m
I n t e g . T i m e : 1 0 m
Heating and cooling integral time, in minutes 15.2 Displayed if B3 or B1 and B3 are connected
Displayed if only B1 is connected
M2.2
F l o w T e m p e r a t u r e
I n t e g . T i m e : 1 0 m
F l o w T e m p e r a t u r e
I n t e g . T i m e : 1 0 m
Heating and cooling flow temperature integral
time.
15.2
Displayed if B1 and B3 are connected
M2.3
H e a t i n g F l o w
M i n : 1 8 c M a x : 5 0 c
M2.4Heating flow temp. limits
Field of room heating Pb.
15.4
Displayed if B1 and B3 are connected, and if M2.4
or M2.6 setting is HEATING
C o o l i n g F l o w
M i n : 8 c M a x : 2 5 c
M2.5Cooling flow temp. limits
Field of room cooling Pb.
15.4
Displayed if B1 and B3 are connected, and if M2.4
or M2.6 setting is COOLING
H e a t i n g C o m p . : N O
O p t : – 1 0 c F p t : 5 0 c
M2.6
Climatic variation of winter flow temp.
Opt=Outside project temp. Fpt =flow project temp.
16.1
Displayed if B1 and B2 are connected and B3
is not connected, and if M2.4 or M2.6 setting is
HEATING.
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
M2.7Climatic variation of summer flow temp.
Opt=Outside project temp. Fpt=flow project
temp.
16.1
Displayed if B1 and B2 are connected and B3
is not connected, and if M2.4 or M2.6 setting is
COOLING
S u m m e r C o m p e n : N O
D i f f . O . T - R . T : 6 c
M2.8Summer compensation : NO ; YES.
Differ.. O.T – R.T. = maximum allowed difference
between summer outside temp. and desired temp.,
above which desired temp. is increased by 1°C for
each °C increase in outside temp.
16.2
Displayed if B2 and B3 or B1, B2 and B3 are con-
nected, and if M2.4 or M2.6 setting is COOLING
D e l a y O f f M 1 : 2 0 m
D e l a y O f f M 2 : 2 0 m
M2.10 Delay time to M1 and M2 pump switch off 21.
Outside air damper opening minimum percentage
Y s - O u t s i d e A i r
M i n i m u m : 0 %
M2.9Displayed only if M2.12 setting is DAMP. TEMPE-
RATURE
19.4
M2. ADJUSTMENT
Ref. Display Description Notes Sect.
M1. TIME SETTINGS AND PERIODS
Ref. Display Description Notes Sect.
D a i l y 1 h r 1 6 . 0 0
O N
D a i l y 1 h r 6 2 2 . 0 0
O F F
M1.2
⇓
⇓
M1.7
Program number, time setting number, and program-
med period starting time.
Selection of type of mode to be assigned to the
period: ON; OFF.
Other 6-page groups according to data in M1.1
Max. 6 periods. To eliminate an unused period press
+ and – simultaneously, display will show - - . - -
Time settings must be in increasing order. No - - . - -
should be left among programmed time settings.
Modes set are winter modes.
25.2
W e e k . 1 : M O N D A Y
D A I L Y 1
W e e k . 1 : S U N D A Y
D A I L Y 1
M1.9
⇓
⇓
M1.15
Winter program selection for the entire year period 1 :
7-DAY 1...5; 24-HOUR 1...25; ON; OFF
25.3
H o w m a n y d a i l y
p r o g r a m m e s ? 1
M1.1Selection of amount of 24-hour programs to be
used (1...25)
Eliminates unused display pages 25.2
H o w m a n y w e e k l y
P r o g r a m me s ? 0
M1.8Eliminates unused display pages 25.3
Selection of amount of 7-day programs to be used
(0...5)
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 Winter season start and end dates 25.5
H o w m a n y a n n u a l
p e r i o d s ? 0
M1.16 Selection of amount of year period programs to be
used (0…25).
Eliminates unused display pages 25.4
P r o g r . P e r i o d 1
O F F
M1.17 Program selection for the entire year period 1:
7-DAY 1...5; 24-HOUR 1...25; ON; OFF
Other 6-page groups according to data in M1.16
Displayed only if more than 0 in M1.16 25.4
A n n P 0 1 s t a r t N O
F r : - - . - - t o : - - . - -
M1.18 NO=period not used; 00=starting time midnight;
12=starting time 12 o’clock noon;
Year period start and end date
Other pages according to selection in M1.16
Displayed only if more than 0 in M1.16 25.4
S u m m e r S e a s o n
F r : 1 5 . 0 6 t o : 1 5 . 0 9
M1.20 Summer season start and end dates 25.5
B S T A U T
F r : 2 5 . 0 3 t o : 2 7 . 1 0
M1.21 Dates of start and end of BST period. 25.6
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 Outside temp. for winter switching.
Period during which outside temp. must remain lower
than the set value before switching to Winter
24.
Displayed if M3.2 setting is FR.OUTSIDE T.
O u t S u m m e r T . : 2 5 c
D e l a y : 4 h r s
M2.16 Outside temp. for summer switching.
Period during which outside temp. must remain higher
than the set value before switching to Summer
24.
Displayed if M3.2 setting is FR.OUTSIDE T.

20
E 136 - XTA 624 C1 Eng. 22.11.10 AM REV. 02
We reserve the right to make changes without notice
COSTER
M3. EQUIPMENT CONFIGURATION
Ref. Display Description Notes Sect.
Configuration of connected detectors (outputs B-M)
– = detector not connected;
number = detector connected.
Default config.: no detectors connected
D e t e c t o r s L a y o u t
– – – – –
M3.11 : Flow temp. detector B1.
2 : Outside temp. detector B2.
3 : Room or extract air temp. detector B3.
4 : Preheating or dew point temp. detector B4.
5 : Temperature set point adjuster Rt°.
14.
Commutazione stagionale :
NO ; WINTER ; SUMMER; FR ss CONTROL ;
M3.220.
S e a s o n S w i t c h i n g
N O
Output Y1 : MODULATING ; 2 STAGES ; 3 STAGES;
actuator stroke time in seconds
M3.3
Stroke time: displayed only if MODULATING
18.
Y 1 : M O D U L A T I N G
R u n t i m e : 1 2 0 s
Output Y1 action.
Displayed if M2.2 setting is NO
Y 1 : H E A T I N G
M3.4Select action:
PREHEAT; HEATING; COOLING; OFF
18.
Y 1 - W i n : H E A T I N G
Y 1 - S u m : H E A T I N G
Output Y1 action in season periods.
Displayed if M2.2 setting is NO
Output Y2 : MODULATING; 2 STAGES; 3 STAGES;
actuator stroke time in seconds
M3.5
Stroke time: displayed only if MODULATING
18.
Y 2 : M O D U L A T I N G
R u n t i m e : 1 2 0 s
Output Y2 action.
Displayed if M2.2 setting is NO
Y 2 : C O O L I N G
M3.6Output Y2 action.
PREHEAT; HEATING; COOLING; OFF
18.
Y 2 - W i n : C O O L I N G
Y 2 - S u m : C O O L I N G
Output Y2 action in season periods.
Displayed if M2.2 setting is NO
S e n d A l a r m s : N O
P a s s W T e l e m a n : N O
M3.8Alarm transmission enabled.
Telemanagement password enabled
10.4
Required only if connected through C-Bus
10.3
A d d r e s s : – – –
G r o u p : –
M3.9Equipment Web address
Equipment group
Required only if connected through C-Bus
M3.10 23.1
Functional alarms enabled.
Default config.: Only alarm 8 enabled (cannot be
disabled)
1 : flow temperature difference B1
3 : room temperature differenceB3
4 : preheating temperature differenceB4
8 : internal clock alarm
A l a r m F u n c t i o n s
– – – 8
M3.11 A l a r m s D e t e c t o r
– – – –
23.2
Detector alarms enabled.
Default config.: all disabled
1 : flow temp. detector B1 malfunction
2 : outside temp. detector B2 malfunction.
3 : room temp. detector B3 malfunction
4 : preheating detector B4.
M3.13 P a s s w o r d c h o i c e
- - - -
22.1
Select password to disable + and – keys:
1901 … 1999
To delete key press + and – simultaneously
M3.14 S i t e N a m e
- - - - - - - - - -
22.2
Set site name Use + and – to enter letters or numbers
Use ← and → to change positions
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
M3.17 Multiplier to obtain Pb of Preheating temp. from
heating flow Pb.
15.2
Displayed if either output has been assigned the
function PREHEATING
T E C H N I C A L P A G E S
P R E S S + K E Y
P b F l o w =
P b R o o m x 5 . 0
M3.15 Multiplier to obtain Pbs of cooling temp. from
heating Pbs.
15.2
Displayed if B1 and B3 are connected
P b C o o l i n g =
P c H e a t i n g x 0 . 5
M3.16 Multiplier to obtain Pbs of cooling temp. from
heating Pbs.
15.2
Displayed if either output has been assigned the
function COOLING
Select Ys action:
DAMP.TEM.; RECUPER
Y s - C o n t r o l :
D A M P . T E M P .
M3.7
.
19.
P b D a m p e r s =
P b H e a t F l o w x 1 . 0
M3.18 Multiplier to obtain Pb of Air Damper Control from
room heating Pb.
15.2
Displayed if B2 and B3 are connected, and if M2.7
setting is DAMP.TEMPERATURE
d T R e c u p e r a t o r =
P b H e a t F l o w x 1 . 0
Multiplier to obtain Pb of recuperator Control from
room heating Pb.
Displayed if B2 and B3 are connected, and if M2.7
setting is RECUPERATOR
C B U S s p e e d
1 2 0 0 b p s
M3.12 The speed of the communication bus (C-Bus) can
be chosen from: 1200, 2400, 4800, 9600 bouds.