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USER MANUAL

CONTROL

CLIMATIC 50

AIRCOOLAIR

English/09-2005

CONTENTS

• CONTROL COMPONENTS

• WIRING CONNECTIONS

CONTROL CONNECTION ELEMENTS

TERMINAL DC50 COMFORT AND DS50 SERVICE CONNECTION

ELECTRICAL BOX (OUTDOOR UNIT)

• DC50 COMFORT DISPLAY OPERATION MODE

DISPLAY

REMOTE INSTALLATION

SWITCHING ON AND OFF THE UNIT

SET-POINT OVERRIDE 3 HOURS

FORCED UNOCCUPIED ZONE

CLOCK MENU

“TIME ZONE” MENU

“SCHEDULING” MENU

• DS50 SERVICE DISPLAY OPERATION MODE

START UP SCREEN

SCREEN LANGUAGE SELECTION

MAIN SCREEN AND MOVING DOWN THE MENUS

CLOCK

“SCHEDULING” MENU

SPECIAL SCREENS FOR DIAGNOSTIC

CONTROL INTERFACES DS50 MENU TREE

• ALARMS

DC50 COMFORT DISPLAY

DS50 SERVICE DISPLAY

ALARM CODES

• COMMUNICATIONS

SERVICE DISPLAY AND CONTROL ADDRESS

COMFORT DISPLAY ADDRESS

MASTER/SLAVE

COMMUNICATIONS BMS

MODBUS PROTOCOL

LONWORKS PROTOCOL

• BE50 MODULE

• CONTROL SOFTWARE FEATURES

CAPACITY FACTOR

REACTIVITY

TIME ZONES AND SCHEDULING

ANTICIPATION

FREE COOLING

DYNAMIC SET POINT

ON/OFF CONDENSING PRESSURE CONTROL

PROPORTIONAL CONDENSING PRESSURE CONTROL

REHEATING MODE

DEFROST

PROTECTION

PAGE

2

3

3

3

11

11

12-15

16

17

18

18

18

18

19

21

22

22

22

20

20

20

20

22

22

23

6

6

6

6

6

6

7-10

5

5

5

5

4

4

4

4

1

CONTROL COMPONENTS

Find below all the components for the CLIMATIC 50 controller:

STANDARD COMPONENTS:

Control module-BM50

Controller fitted on the electrical box, with a 16 bit microprocessor for running the control program, and the set of terminals required for connection to the controlled devices. The program and the parameters are saved permanently in the FLASH memory, preventing data loss in the event of power failure.

Different boards and terminals can be connected according to different communications protocol.

Connection module-DT50

It has to be connected to the main control-BM50. Comfort display and service display can be connected through it. It is used for long distances connection (up to 200m) as an option.

Comfort display-DC50

Remote controller with LCD display and very easy to use. This graphical display gives information such as running mode of the unit, status of the fan, set point, %of fresh air, and outside temperature.

On/off , scheduling, set-point override 3 hours, forced unoccupied zone, clock menu and alarm history can be managed through this terminal.

Remote ambient sensor-AS

To connect by the installer (see unit documentation). It has to be place in order to measure air ambient temperature.

Regulation is made according the temperature measured by this sensor.

It supplied with the outdoor unit.

Outdoor sensor-OS

To connect by the installer (see unit documentation). This sensor shows continuously outdoor temperature.

It is used to set operation limits, time advances, and set point adjustment. When free cooling option is included this sensor compares the outdoor air temperature with indoor ambient temperature.

Humidity temperature sensor (OS HR/T) is included with enthalpic free cooling.

It supplied with the outdoor unit.

OS (Tª) OS HR/T

( Tª -humidity)

Discharge sensor-DS

To connect by the installer (see unit documentation). The indoor unit includes a temperature air discharge sensor to assure the unit works properly.

Refrigerant pressure transducer-PT

The unit includes one per circuit. Control regulation is based on high pressure for cooling mode and on low pressure for heating mode.

OPTIONS

Service display-DS50

Remote controller with LCD display used for extra functions as anticipation, dynamic set point, different safety protections, defrost, condensing pressure control, free cooling, communications master/slave and BMS.

Maintenance personnel can used it to configurate up to 90 parameters, check up to 45 faults and the last

16 faults in the alarm history.

BE 50 Expansion Module-BE50

Connected to the main control BM50 in order to get additional inputs and outputs. 4 analogical inputs, 4 digital inputs and 4 digital outputs can be used. It is needed with options: Exhaust fan, TCB for voltage free contact and enthalpic free cooling.

TCB Module-TCB

For voltage free contact. All the signals, fan, compressor, electrical heater, cooling, heating, etc. are available as voltage free contacts.

RS (Tª)

RS HR/T

( Tª -humidity)

Duct sensor-RS

To connect by the installer. As an option it is possible to connect a NTC sensor in teh indoor unit return duct.

This sensor substitutes the AS remote ambient sensor.

Humedity temperature sensor (RS HR/T) is included with enthalpic free cooling.

It supplied with the outdoor unit.

Air differential pressure transducer-DPT

It is included with the option Dirty filter indication.

CO2 Air Quality Probe-CO2

An Air Quality Probe is available as an option. Available only with enthalpic free cooling option.

Duct sensor for thermostatic and enthalpic Free cooling-MS

A sensor in the air return duct is included with the free cooling option to set the fresh air mixing.

Thermostatic free cooling

Temperature comparison is made by the ambient sensor (AS) or the return temperature sensor (RS) and the outdoor sensor (OS).

Enthalpic free cooling

Ambient sensor (AS) or return sensor (RS) and outdoor temperature sensor (OS) are mixed sensors for relative humidity temperature (HR/T). BE50 is needed for the installation.

2

WIRING CONNECTIONS

IMPORTANT

Any wiring modification on the CLIMATIC 50 must be done by Lennox technician or employees having valid electrical qualification.

For any modification of wiring on the 24V supply or on 4-20mA sensor, check the polarity prior to apply the power. Wrong polarity may cause serious damage. Lennox will not accept liability for damage caused by wrong power connection or any wiring modification done by people without valid training and qualifications.

CONTROL CONNECTION ELEMENTS

Return section

(option)

Mixing section

(option)

Indoor unit

RS

RS

HR/T

DPT

CO2

MS

INDOOR

UNIT

DS

AS

AS

HR/T

Electrical box

PT1

PT2

OUTDOOR UNIT

TERMINAL DC50 COMFORT AND DS50 SERVICE CONNECTION

DC50

OS

OS

HR/T

(*) AWG24 shielded cable with 3 twisted pairs+screen.

A

DS50

B

Max 200m (*)

BM50

J10

C

DC50

Max 50m (*)

6 5 4 3 2 1 0

A

1 2 3 1 2 3

B

C

DT50

Max 50m (*)

DS50

Optional element

To wire by the installer

NOTE: Jumpers in the expansion module BE50 have to be connected between 1 and 2 in order to get power supply available to all connectors.

ELECTRICAL BOX (OUTDOOR UNIT)

TCB

Y1

Y2

O

BX50

BX50

W1

W2

RESET

90 91 92 93 94 95 96 94 110 111

Smoke detector

ON/

OFF

General alarm

DT50

DC50

BE50

3

Digital inputs Digital outputs Analogical inputs

DC50 COMFORT DISPLAY OPERATION MODE

Display used as a remote control and to set or change the scheduling of the different time zones, the temperature set point for each zone. It also has the capacity to set a 3 hours override and to force the unoccupied mode or any of the different time zones for a period of up to 7 days. It displays the real time clock and different faults signals.

DISPLAY

Type FSTN graphic

Back light: Green LEDs

Resolution: 120×32 pixels

Power Supply: Voltage from main Climatic board

Max power: 0.8W

REMOTE INSTALLATION

The optional DC50 is designed to be mounted on the wall.

Fit the cable from the DT50 board through the back piece Fasten the back piece to the wall using the rounded head screws supplied in the packaging Connect the cable from the main board on the

RJ12 plug on the back of the DC50 display

Fasten the front panel on the back piece using the flush head screws supplied

Finally fit the click-on frame

A B C D

1

2

3

E

24.2°C ON

FA:20% Dyn Fan:Auto

Out:40.0°C Z:A Cool

F

SWITCHING ON AND OFF THE UNIT

G H

4

5

6

1 time Zone Settings

2 set Time

3 back screen 0 or cancel override

4 increases value or go to override

5 change field or validate

6 decreases value or go to override

A room Temperature

B dynamic set point «active»

C fan mode in dead band

D indoor Fan status

E actual fresh air rate

F outdoor air temperature

G current time zone

H operating mode

Pressing the key from the main screen, will display the message «Do you want to: Switch off unit». Press the keys and select «YES», the unit will be off and the next screen will appear in the comfort display DC50.

Do you want to:

Switch off unit:NO

Choose override:Yes

12.0°C OFF

WARNING: Switching Off the unit disable all safety Protections.

The unit can then be switched back ON by pressing the key again.

4

Override 3 hours

ROOM SP : 24.0°C

Mini FA : 20%

1

2

3

SET-POINT OVERRIDE 3 HOURS

From the main screen press simultaneously the keys.

The screen on the left will display.

1 and 3 increase or decrease a value while 2 validates the choice and go to the next line.

4 goes back to main screen.

If the display remains inactive for 15 seconds: It will reverts back to the main screen.

Pressing ESC from the main screen will cancel the set-point override.

4

1

2

1

2

3

Do you want to :

Switch off unit : NO

Define Unoccupation:Uno

Set override period:

Uno

M T W T F S S

12 h 24

Thursday March 27

Time zone : A

ROOM SP : 24.0°C

Min FA : 20%

Day : Monday

Start

ZA : 8h00 ZB :12h00

ZC :22h00 uno :22h00

1

2

1

FORCED UNOCCUPIED ZONE

From the main screen press key, the screen on the left will display.

Press key until the cursor moves to «choose override: no » and select with keys «uno»

Next screen will display and you can force the unoccupied period for up to seen days starting from the current day.

Keys 1 and 2 allow you to increase or decrease the number of days.

2

4

5

6

CLOCK MENU

Time and date can be adjusted in the clock menu than can be accessed by pressing the «clock key» from the main menu.

The Keys will change a value while the key validate the changes.

«Esc» returns to main screen.

NOTE: The day of the week is set automatically.

“TIME ZONE” MENU

Pressing «Prg», the screen on the left is displayed:

1 goes to scheduling.

2 change time zone (A, B, C, Uno).

3 back to main screen.

4 increases value.

5 validates and goes next line.

6 decrease value.

3

4

5

“SCHEDULING” MENU

The scheduling menu can be accessed from the

“time zone: A” menu by pressing “Prg” again.

1 change day.

2 back to main screen.

3 increases value.

4 validates and goes next line.

5 decreases value.

5

DS50 SERVICE DISPLAY OPERATION MODE

DS50 Service Display can be ordered as an option to access:

-Extra scheduling menu, time advance and dynamic set point.

-Unit adjustments: defrost, condensing pressure control, timer, limits of outdoor and discharge air temperature, BMS configuration.

-Displayable: Temperatures and pressures, different component status, capacity percentage, and other functions.

-Configuration: unit, master/slave, BMS communications, options and different parameters for the control.

Short cut to Alarm menu

Go out the service display menu

Go back to screen (1)

Language or

English

AC 050.01

BIOS.0357 Boot 0301

Move up in a menu or increase value

Software version

AC: Aircoolair

050: Climatic 50

01: 1 version

Enter/Valid/Select

Move down in a menu

LENNOX

Pres Prg to start

START UP SCREEN (1)

To access DS50 Service Display menu, press Prg key.

Menu selected

CAPITAL letters

Language or

English

AC 050.01

BIOS.0357 Boot 0301

Number of unit

(0000)01 Zone A

1-ALARM 12h44

2-Data Tuesday

3-Setting April 03

(3120)01

1-Hour 12h

2-Minute 44m

3-Day 4

Time zone

SCREEN LANGUAGE SELECTION

Five languages are available in addition to English. The required language must be specified at the time of order. It can be modified on site by Lennox technicians.

In this menu the specified language can be selected using the up and down keys. The “prg” key validates the choice and start the controller.

MAIN SCREEN AND MOVING DOWN THE MENUS

Pressing the arrow keys allows you to move up and down the menu tree. The selected item changes to CAPITAL letter.

You can select it pressing key.

Pressing “ESC” at any time sends you back one level up the menu tree.

Pressing “ESC” will invalidate any changes made to a value in a setting page.

CLOCK

The clock setting menu can be accessed from the main menu by selecting the menu “SETTING” and then navigating down through the sub-menus until page (3120).

Up one level

Current setting

(3121)01

min:00

HOUR

14h

std:

max:23

Maximum setting

Minimum setting

Validate and back one level

Factory setting

“SCHEDULING” MENU

From Main menu (0000) navigate down to sub-menu

“SETTINGS”, zone settings (3320).

In this particular page, pressing the “prg” key, changes the time zone. If «ROOM SET» is selected, it displays the Minimum Set

Point for the specific time zone shown in the top corner.

Pressing the “prg” validates any changes made, and moves to the next time zone. “ESC” does not validate the changes and move back one step in the menu tree.

SPECIAL SCREENS FOR DIAGNOSTIC

For unit operation diagnostic, it is helpful to use the special following screen:

— Screen 2500 defrosting cycles.

— Screen 2700 unit connected and unit in standby.

Which can be reached by pressing the «Prg» key while being on the current screen.

6

CONTROL INTERFACES DS50 MENU TREE

Code

1000

2000

2100

Description

1.- Alarm

2.- Data

1.- General

Code Description

2200 2.- Control

Code Description U

2110 1.-Temperature

2120

2130

2140

2150

2160

2210

2220

2.-Humidity

3.- Others

4.- Outputs

5.- Inputs

6.- % Inputs

1.- Ambient

2.- Reheat

2111

2112

2113

2114

2121

2122

2123

2124

2131

2132

2133

2134

2135

2161

2162

2163

2164

2165

2166

2167

2168

2141

2142

2143

2144

2151

2152

2153

2154

2211

2212

2213

2214

2215

2216

2221

Outdoor

Ambient

Discharge

Return

Outdoor

Ambient

Outdoor

Ambient

Air Diff.

CO

2

Sw On/Off

Sw Reset

Sw Unoc.

Eh50.1

Eh 50.2

Eh 50.3

Eh 50.4

Eh 50.1

Eh 50.2

Eh 50.3

Eh 50.4

Eh 50.1

Eh 50.2

Eh 50.3

Eh 50.4

Eh 50.1

Eh 50.2

Eh 50.3

Eh 50.4

S.P.cool

S.P.heat

Pot. cool

Pot. heat

Sw Des cool

Sw Des heat

Set point

ºC

ºC

ºC

ºC

%

% g/Kg g/Kg

Pa

Ppm

On/off

On/off

On/off

%

%

%

%

ºC

ºC

ºC

ºC

On/off

On/off

On/off

On/off

On/off

On/off

On/off

On/off

ºC

ºC

%

%

On/off

On/off

ºC

%

Min Set Max Description

Outdoor temperature.

Ambient temperature.

Discharge temperature.

Return temperature.

Outdoor relative humidity

Ambient relative humidity

Outdoor absolute humidity

Ambient absolute humidity

Difference air pressure (option)

Quantity of CO

2

(option)

On/Off switch

(On/off Unit)

Alarm reset switch

On – Reset, Off – normal)

Unoccupied switch

(On – unoccupation, Off – normal)

On/off outputs status-BE 50 module

On/off inputs status-BE 50 module

Proportional inputs status-BE50 module

Cooling set point

Heating set point

Cooling capacity desired

Heating capacity desired

Switch for cooling mode disabled

Switch for heating mode disabled

Reheat set point temperature. See below outdoor Tª > TC cooling 0.5 -> cooling set point cooling TC-0.5 > outdoor Tª> TC heating + 0.5 -> outdoor Tª

Heating TC +0.5 > outdoor tª -> heating set point

Reheat capacity desired

TCB switches status

2300

2400

3.- Fan

4.- Refrig. Aux

2230

2310

2320

2330 3.- Condenser 1

2340

2410

3.- TCB

1.- Fan mode

2.- Exhaust

4.- Condenser 2

2334

2335

2341

2342

2343

2344

2345

2411

2412

2315

2316

2321

2322

2323

2331

2332

2333

2222

2241

2242

2243

2244

2245

2246

2311

2312

2313

2314

2413

2414

2415

2416

Cooling

Sw G

Sw Y1

Sw Y2

Sw W1

Sw W2

Sw O

Config.

Status

Sw status

Fire/smoke

Relay

T.Func

Status

Relay

Relay

Config

Status

Sw status

Relay

Prop. CPC

Config

Status

Sw Status

Relay

Prop CPC

Config

Status

Min Ae

Modulac.

Open

No

List

List

On/off

On/off

On/off h

List

On/off

On/off

List

List

On/off

On/off

%

List

List

On/off

On/off

%

List

List

%

%

%

Yes/no

No/500Pa/1000Pa

Stop/Time/Fault/Starting up

Fan signal status

Smoke signal opened/closed

(On/Off smoke signal)

Control signal sent to the fan

Fan running hours

Stopped/air flow/Fault/Starting up

First step-exhaust fan

Second step-exhaust fan

Yes/No

Stopped/air flow/starting up/defrost

Fan status signal

Control signal sent to the fan

Proportional output value (option)

Yes/No

Stopped/air flow/starting up/defrost

Fan status signal

Control signal sent to the fan

Proportional output value (option)

No/0%-50%/Modulation/100%

Stopped/Air Flow/Starting up/

Enthalpy/Outdoor temperature/Time/Defrost

Minimum fresh air

7

CONTROL INTERFACES DS50 MENU TREE

2500

2600

2700

3000

3100

3200

5.- Compressor

6.- E.heater

7.- Comunic

3.- Set point

1.- General

2.- Scheduling

2510

2520

2530

2540

2610

2620

2710

2720

3110

3120

3210

1.- Compressor 1

2.- Compressor 2

3.- Compressor 3

4.- Compressor 4

1.-E.heater

2.- Hot water coil

1.- Outdoor

2.- Ambient

1.- Order

2.- Clock

1.-Time

2.- Anticipation

2718

2721

2722

2723

2724

2725

2726

2727

2728

2625

2711

2712

2713

2714

2715

2716

2717

2615

2616

2617

2618

2621

2622

2623

2624

2546

2547

2548

2549

2611

2612

2613

2614

2537

2538

2539

2541

2542

2543

2544

2545

2528

2529

2531

2532

2533

2534

2535

2536

2519

2521

2522

2523

2524

2525

2526

2527

2511

2512

2513

2514

2515

2516

2517

2518

3125

3126

3211

3212

3213

3214

3221

3222

3111

3112

3113

3114

3121

3122

3123

3124

On/off

Sw Reset

Cancel

Test

Hour

Minute

Day

Month

Year

Inv/Ver

Starting Unoc

Starting Z A

Starting B

Starting Z C

Plant

Slope

Sw Disabled

Value

Sensor

Connection

Bms

Value

Sensor

Connection

Bms

Value

Sensor

Connection

Bms

Value

Sensor

Connection

Bms

Relay

H.pump, comp

Sw disabled

T.Func

Config

Status

Sw Status 1

Sw Status 2

Relay 1

Relay 2

Modulac.

Sw disabled

Config

Status

Openning

Sw Antifreeze

Config

Status

Defrost T

Sw Status

Sw Pres B

Relay

H.pump comp

Sw disabled

T.Func

Config

Status

Defrost T.

Sw Status

Sw Pres B

Relay

H.pump, comp

Sw disabled

T.Func

Config

Status

DefrostT.

Sw status

Sw Pres B

Relay

H.pump, comp

Sw disabled

T.Func

Config

Status

Defrost T.

Sw Status

Sw Pres B

8

CONTROL INTERFACES DS50 MENU TREE

3300

3400

3500

3600

3700

3800

3.- Control

4.- Fan mode

5.- Fresh air

6.- Compressor

7.- Reheat.

8.- Config.

3310

3320

3330

3340

3350

3360

3410

3510

3610

3620

3630

3640

3650

3710

3720

3810

3820

1.- Customer

2.- Ambient

3.- Reheat

4.-Enable

5.- Reactiv.

6.- Safety

1.- Out. im E

2.- Defrost

3.- Timer

4.- CPC

5.- Prop. CPC

1.- Reheat.

2.-Hot w/coil

1.- Unit

2.- Option

3830 3.- Custom.out.

3366

3367

3411

3412

3413

3511

3512

3513

3351

3352

3353

3361

3362

3363

3364

3365

3514

3515

3516

3517

3518

3611

3341

3342

3343

3344

3345

3346

3347

3348

3311

3312

3321

3322

3323

3324

3331

3332

3612

3613

3621

3633

3641

3642

3643

3644

3651

3652

3653

3622

3623

3624

3625

3626

3627

3631

3632

3654

3655

3711

3712

3713

3721

3722

3723

3811

3812

3813

3821

3822

3823

3824

3825

3831

3832

3833

3834

Low noise

Cool

Heat

Reheat

Low Amb

High Alta

Low disch. 1

Low disch. 2

Low disch. 3

High disch. 1

High disch. 2

Air flow

With.filter

Dirty filter

Out.limit

Maximum

SP int

Min Ae

SP Dyna

SP Cool

SP Heat

Inv Priori

Activation

Inv Priori

Fan on/off

Fan dead zone

Out.air

CO

2

Comp cooling

Comp heating

E.Heater

Hab Ext

Stara Ext 1

Stara Ext 2

Min CO

Max CO

Calib

Cool 50

2

2

Cool 100

Heat 100

Type

E.heater

Defrost Fin

Mn Time

Mx Time

Reduction

Safety

On On

Off On

Sequence

Lo Speed

Hi Speed

Dif Speed

Low Heat

Hab CPC

Set CPC

Band CPC

% Min CPC

% Max CPC

Out. Lim

Mixing SP

Maximum

Out.Lim

Open

Antifreeze

Comp.nr

Circuits

Heat Pump

E.H.

Freecool

Out. air

P. Air

TCB

Eh 50.1

Eh 50.2

Eh 50.3

Eh 50.4

Yes/No

List

List

List

List

Yes/No

List

List

List

List

ºC

%

Yes/No

%

% ppm ppm

Yes/No

ºC

ºC

ºC

List

Yes/No

Bar

Bar

Bar

ºC

Yes/No

Bar

Bar bar bar min min min min

Seg

Seg

%

ºC

%

List

%

%

ºC

ºC

-20.0

0

~

0

0

~

0

0

10.0

-20.0

100

No

33

66

1000

1500

Yes

20.0

40.0

100

~

100

100

2000

2000

~

40.0

10.0

12.0

40.0

-40.0

-20.0

40.0

0 0 1

0

~

0

0

~

0

0

0

0

0

0

0

No

6.0

14.0

1.0

6.0

No

8.0

4.0

60

30

3

6

4.0

14.0

30

60

80

40

10.0

5.0

100

10.0

0

1

~

5.0

5.0

0.1

-10.0

~

5.0

1.0

30

30

0

0

2.0

8.0

0

0

0

0

-20.0

0

0

-20.0

0

0

~

25.0

25.0

9.0

25.0

~

25.0

12.0

6.0

25.0

90

90

10

10

900

900

100

100

40.0

10.0

100

40.0

100

1

0

0

0

No

0

0

No

0

0

0

0

0

2

~

3

3

~

4

4

2

13

13

13

13

Half capacity steps running below this value on cooling mode.

Compressors do not work below this value on cooling mode.

Compressors do not work below this value on heating mode.

0 Dynamic

1 Cyclical

0 0%

1 100%

9

CONTROL INTERFACES DS50 MENU TREE

3900 Comunic

3840

3850

3910

3920

3930

4.- Customer inp.

5. % custom.inp.

1.- Display

2.- Connection

3.- Bms

3911

3912

3913

3914

3921

3922

3923

3924

3841

3842

3843

3844

3851

3852

3853

3854

3931

3932

3933

3934

3935

Eh 50.1

Eh 50.2

Eh 50.3

Eh 50.4

Eh 50.1

Eh 50.2

Eh 50.3

Eh 50.4

SP Min

SP Max

OFFset

Standard SP

Id

Number

Tiype

Type

Id

Type

Baud

Guardian

Bms Unoc.

ºC

ºC

ºC

Yes/No

~

~

List

List

List

List

List

List

List

List

List

List

~

List

List

~

On/Off

0

0

1

1

8.0

21.0

-5.0

~

0

0

1

0

~

0

0

0

0

0

0

0

0

8

2

12

12

21.0

35.0

5.0

~

200

2

4

1000

~

4

4

4

4

14

14

14

14

0

0

1

1

17.0

27.0

0.0

No

3

0

1

0

Off

0

0

0

0

0

0

0

0

10

ALARMS

This menu can be available with DC50 Comfort display or with DS50 Comfort display.

The way to access to the menu is different for both of them, but the information is the same.

DC50 COMFORT DISPLAY

Red

24.2°C OFF

Alarm: Major

Call for maintenance

Alarm history

ALARMS

«Prg» key are lit red. All keys are locked until the cause of the fault disappears.

Red

Alarm 02

01-03/03.12h10*127

02 03/03.12h05*127

03-27/02.12h03=127

ALARM HISTORY MENU

Pressing the key will display the alarm history menu.

Once in the «alarm history» menu you can scroll down using the keys, With the key you will have a full text description of the fault and the date and time at which it occurred.

Red

Alarm 00

03/03 12h05*125

Compressor 2

High pres/elec. power

DS50 SERVICE DISPLAY

Red

(0000)01 Zone A

1-ALARM 12h44

2-Data Tuesday

3-Setting April 03

ALARMS

Select the alarm menu using the arrow keys and press return.

Number of active Alarm

RESET

Red

(1000) 01 Alarm 02

01-03/03.12h10*127

02 03/03.12h05*125

03-27/02.12h03 = 125

Selected Alarm

Alarm Date and Time

Active* or Inactive =

Alarm code

ALARM HISTORY MENU

The faults history is then displayed in the page (1000).

Pressing the “ALARM” resets all the alarms. The number of active alarms goes to 0, no active alarm shown in the menu, the

“bell” key is switched off.

(1000) 01 Alarm 02

01-03/03.12h10=127

02 03/03.12h05=125

03-27/02.12h03=125

Select

Pressing the key, will display details of the selected alarm.

11

ALARMS

ALARM CODES

Al INDICATION

1

Low air flow default

CAUSE EFFECT

Low air flow is detected by the air differential pressure switch. The air pressure difference is below the parameter value 3411.

There is low air flow (belts broken).

The unit will stop. Prg lits red in

DC50 and «Alarm» in DS50.

General alarm and fan alarm are on.

4

Dirty filter indication

Dirty filter is indicated by the air differential pressure switch.

The air pressure difference is higher than the parameter value 3413.

The filters are dirty.

Dirty filter indication. Prg lits red in DC50 and «Alarm» in

DS50. Filter alarm is on.

RESET

Manual

Auto

5

Missing filters

Detected by air differential pressure switch. The air pressure difference is below the parameter value 3412.

There is low air flow.

Filter alarm. Prg lits red in

DC50 and «Alarm» in DS50.

Filter alarm is on.

11

Electrical Heater fault

The electrical heater does not work when the control gives the order.

The electrical heater will stop.

Prg lits red in DC50 and «Alarm» in DS50. General alarm and electrical heater alarm are on.

12

13

22

23

70

71

High air intake temperature

Low ambient temperature

Low air intake temperature

Clock fault

BE50 fault

Air intake temperature higher than the parameter value 3367 (60ºC).

Compressors and Electrical heater will stop. Prg lits red in

DC50 and «Alarm» in DS50.

General alarm is on.

Ambient temperature is lower than the parameter value 3361.

Air intake temperature is lower than the parameter value 3365. (6ºC)

Prg lits red in DC50 and «Alarm» in DS50. General alarm is on.

If it occurs during more than

15′, the unit in back-up will start.

Compressors and Electrical heater will stop. Prg lits red in

DC50 and «Alarm» in DS50.

General alarm and low air intake temperature alarm are on.

Prg lits red in DC50 and «Alarm» in DS50. General alarm is on.

If it occurs during more than

15′, the unit in back-up will start.

Clock board does not work or it has not been installed properly.

Prg lits red in DC50 and

«Alarm» in DS50. General alarm is on.

BE 50 Module has not been installed or it does not work properly.

Prg lits red in DC50 and

«Alarm» in DS50. General alarm is on.

12

Auto

Manual

Auto

Auto

Auto

Auto

Auto

Auto

ALARMS

ALARM CODES

Al INDICATION

81 Wrong ambient sensor

83 Wrong outdoor sensor

85

Wrong air intake temperature sensor

CAUSE

Sensor temperature is lower than

-48ºC or higher than 99ºC.

EFFECT

The unit will stop. Prg lits red in

DC50 and «Alarm» in DS50.

General alarm is on.

Sensor value is lower than 2% or higher than 98%. Only available with enthalpic free cooling.

The unit will stop. Prg lits red in

DC50 and «Alarm» in DS50.

General alarm is on.

Sensor temperature is lower than

-48ºC or higher than 99ºC.

The unit will stop. Prg lits red in

DC50 and «Alarm» in DS50.

General alarm is on.

Sensor value is lower than 2% or higher than 98%. Only available with enthalpic free cooling.

The unit will stop. Prg lits red in

DC50 and «Alarm» in DS50.

General alarm is on.

Sensor temperature is lower than

-48ºC or higher than 99ºC.

The unit will stop. Prg lits red in

DC50 and «Alarm» in DS50.

General alarm is on.

Sensor temperature is lower than

-48ºC or higher than 99ºC

Only available with free cooling.

Prg lits red in DC50 and «Alarm» in DS50. General alarm is on.

The fan does not work according to the control information (start/stop information).

The unit will stop. Prg lits red in

DC50 and «Alarm» in DS50.

General alarm and fan alarm are on.

The fan does not work according to the control information (start/stop information) before 5 seconds.

Not activated or not configured in circuit 1.

Compressor and fan for circuit

1 stop. Prg lits red in DC50 and

«Alarm» in DS50. General alarm and compressor alarm are on.

93 Fire/smoke default

The fan does not work according to the control information (start/stop information) before 5 seconds.

Not activated or not configured in circuit 2.

Compressor and fan for circuit

2. Prg lits red in DC50 and

«Alarm» in DS50. General alarm and compressor alarm are on.

Fire/smoke inlet opened

The unit will stop and air intake damper will be open. Prg lits red in DC50 and «Alarm» in DS50.

General alarm and smoke alarm are on.

Pressure transducer for circuit 1 detects a pressure lower than 1 bar and higher than 30bar.

Compressor and fan for circuit

1 stop.Prg lits red in DC50 and

«Alarm» in DS50. General alarm and compressor alarm are on.

Compressor 1 does not work according to the start/stop control information before 5 seconds.

It does not work if compressor 1 is disabled.

Compressor and fan for circuit

1 stop. Prg lits red in DC50 and

«Alarm» in DS50. General alarm and compressor alarm are on.

13

Auto

Manual

Manual

Manual

Manual

Auto

Manual

RESET

Auto

Auto

Auto

Auto

Auto

ALARMS

ALARM CODES

Al INDICATION

117

(1)

Low pressure failure circuit 1

CAUSE

High pressure input for circuit 1 opens. It does not work if circuit 1 is disabled.

EFFECT

Compressor and fan for circuit

1 stop. Prg lits red in DC50 and

«Alarm» in DS50. General alarm and compressor alarm are on.

Low pressure input for circuit 1 opens. It does not work if circuit 1 is disabled.

Compressor and fan for circuit

1 stop. Prg lits red in DC50 and

«Alarm» in DS50. General alarm and compressor alarm are on.

121

Pressure transducer default circuit 2

Pressure transducer for circuit 2 detects a pressure lower than 1 bar and higher than 30bar.

Compressor and fan for circuit

1 stop. Prg lits red in DC50 and

«Alarm» in DS50. General alarm and compressor alarm are on.

124

Power compressor 2 default

Compressor 2 does not work according to the start/stop control information before 5 seconds.

It does not work if compressor 2 is disabled.

Compressor and fan for circuit

2 stop. Prg lits red in DC50 and

«Alarm» in DS50. General alarm and compressor alarm are on.

125

127

(1)

134

High pressure failure circuit 2

Low pressure failure circuit 2

Power compressor 3 default

High pressure input for circuit 2 opens. It does not work if circuit 2 is disabled.

Low pressure input for circuit 2 opens. It does not work if circuit 2 is disabled.

Compressor and fan for circuit

2 stop. Prg lits red in DC50 and

«Alarm» in DS50. General alarm and compressor alarm are on.

Compressor and fan for circuit

2 stop. Prg lits red in DC50 and

«Alarm» in DS50. General alarm and compressor alarm are on.

Compressor 3 does not work according to the start/stop control information, before 5 seconds.

It does not work if compressor 3 is disabled.

Compressor and fan for circuit

3 stop. Prg lits red in DC50 and

«Alarm» in DS50. General alarm and compressor alarm are on.

144

Power compressor 4 default

902 Unit 2 fault

903 Unit 3 fault

904 Unit 4 fault

905 Unit 5 fault

Compressor 4 does not work according to the start/stop control information, before 5 seconds.

It does not work if compressor 4 is disabled.

Compressor and fan for circuit

4 stop. Prg lits red in DC50 and

«Alarm» in DS50. General alarm and compressor alarm are on.

There is a fault in the master/slave connection for unit 2.

For master unit Prg lits red in

DC50 and «Alarm» in DS50,

General alarm is on.

There is a fault in the master/slave connection for unit 3.

For master unit Prg lits red in

DC50 and «Alarm» in DS50,

General alarm is on.

There is a fault in the master/slave connection for unit 4.

For master unit Prg lits red in

DC50 and «Alarm» in DS50,

General alarm is on.

There is a fault in the master/slave connection for unit 5.

For master unit Prg lits red in

DC50 and «Alarm» in DS50,

General alarm is on.

14

RESET

Manual

Auto/

Manual

Auto

Manual

Manual

Auto/

Manual

Manual

Manual

Auto

Auto

Auto

Auto

ALARMS

ALARM CODES

Al INDICATION

906

907

908

909

910

911

912

Unit 6 fault

Unit 7 fault

Unit 8 fault

Unit 9 fault

Unit 10 fault

Unit 11 fault

Unit 12 fault

CAUSE EFFECT

There is a fault in the master/slave connection for unit 6.

For master unit Prg lits red in

DC50 and «Alarm» in DS50,

General alarm is on.

There is a fault in the master/slave connection for unit 7.

For master unit Prg lits red in

DC50 and «Alarm» in DS50,

General alarm is on.

There is a fault in the master/slave connection for unit 8.

For master unit Prg lits red in

DC50 and «Alarm» in DS50,

General alarm is on.

There is a fault in the master/slave connection for unit 9.

For master unit Prg lits red in

DC50 and «Alarm» in DS50,

General alarm is on.

There is a fault in the master/slave connection for unit 10.

For master unit Prg lits red in

DC50 and «Alarm» in DS50,

General alarm is on.

There is a fault in the master/slave connection for unit 11.

For master unit Prg lits red in

DC50 and «Alarm» in DS50,

General alarm is on.

There is a fault in the master/slave connection for unit 12.

For master unit Prg lits red in

DC50 and «Alarm» in DS50,

General alarm is on.

RESET

Auto

Auto

Auto

Auto

Auto

Auto

Auto

(1) Low pressure switch does not work during the first 2 minutes while the compressor is working and during defrost cycle.

The reset for the alarm is Automatic the first 3 times, after that it will be manual.

If the pressure switch is opening more than 1 hour the alarm will be manual too.

The number of alarms is daily reset at 11:00 h.

15

COMMUNICATIONS

ADDRESS CONFIGURATION

Several units can be connected in order to share comfort displays, with master/slave configuration or with a BMS configuration. For all of these cases an address configuration is needed.

Each unit has to be addressed with each comfort display, control and service display (option).

See below the values for each one:

-Service display (DS50) = 32

-Control module BM50 = 1…12

-Comfort display (DC50) = 17…28.

D2 units can be work with only one comfort display. By changing the comfort display address (17….28) we can have access to the indoor unit setting.

SERVICE DISPLAY AND CONTROL ADDRESS

Unit :- —

Display address

Setting………………: 32

I/O Board address:—

(1) Press simultaneously keys during a few seconds.

It will display screen (2).

(2) Press the key until the cursor moves to the field

«Display address setting». Use the key to select between

0 and 32.

Display address changed

Display address

Setting………………: 00

I/O Board address:—

(3) To address the control select 0 and press key. It will display screen (4).

###################

Selftest

Please wait

###################

It will display screen (4) during a few seconds and then it will display screen (5).

pLAN address: 1

UP: increase

DOWN: decrease

ENTER: save & exit

When the address value is changed and switch on the display it will display screen (5). Press and Alarm during a few seconds and it will display screen (6).

(6) Control board can be addressed. With keys the address can be changed and press key to validate.

Display address

Setting——:32

I/O Board address:—

(7) Switch off and then switch on the control. Press

keys for changing service display address.

Service terminal

Wait to connect

(8) Press key until the cursor moves to the field «Display address setting». Use keys to select the required value

(usually 32) and confirm by pressing key

Unit :- —

(9) Switch off and then switch on the control. It will display the screen showed above.

16

(10) Finally it will display the screen where you have to indicate the number of the unit.

Pressing keys more than five seconds when the unit start, it can display the screen on the right.

indicates control address and indicates display address.

COMFORT DISPLAY ADDRESS

Display address settings ….: nn

I/O Board adress:XX

Display address changed

(1) Switch on the unit, press together and hold them for at least 5 seconds. The screen shown above will be displayed with the cursor flashing in the top left hand corner. To change the address of the terminal display press the key once. Use the keys to select the desired value and confirm by pressing .

Display address settings ….: 17

I/O Board adress:XX

(2) If the address was changed, it will display this screen during a few seconds and after that it will appear the main screen of the display.

Terminal Config

Press ENTER

To Continue

It will display the screen (4) . Pressing again Iit will display the screen (5).

(3) Access the configuration mode by pressing at least 5 seconds. Press the key until the cursor

for moves to the field «I/O Board address :XX». Use keys to select the correct control board and press to validate.

P12:Adr Priv/Shared

Trm1

Trm2

17

32 pr sh

Trm None —OK? NO

(5) The field «P:XX » shows the address of the selected board. In the example the value «12» has been selected. The filed under the «Adr» column represents the addresses of the terminal displays associated with the board that has the address «12», while the column under «Priv/Shared » indicate the type of terminal selected.

Ph: Private

Sh: Shared

Sp: Shared Printer (N/A)

To exit the configuration procedure and save the data, select the filed «OK?NO», choose «Yes» using the keys and confirm by pressing .

If the terminal remains inactive (no button is pressed) for 30 seconds, the configuration procedure is aborted automatically.

17

COMMUNICATIONS

MASTER/SLAVE

Unit controls can now be connected together (up to 12 for D units and up to 6 for D2 units) with a shielded pair of wire (0.75mm

2

not supplied by Lennox) as explained below:

COMMUNICATIONS BMS

The Climatic 50 can communicate according to various protocol:

— MODBUS Protocol (3932=1)

— Protocol LONWORKS (3932=2)

SERIAL

CARD

AC 01

SERIAL

CARD

AC 02

SERIAL

CARD

AC 03

SERIAL

CARD

AC 04

Cable c, section (mm 2 two wire S12E racing

) from mini 0,2 to maxi 2,5 mm 2

AWG20/22

1000 m maxi

SERIAL CARD

With master/slave connection, next configurations are available:

1.- DC50. The master gives the ventilation order and its set point.

2.- DC50 Temperature. The master gives the ventilation order and its room temperature but other units have their own set point.

3.- DC50 Average. The master gives the ventilation order and the room temperature is the average of all units. Each unit has its own set point.

4.- Master/Slave Temperature. The master gives its room temperature and humidity to all units, each unit has its own ventilation order & set point.

5.- Master/Slave Average. The room temperatures and humidity used by all units are the average. Each unit has its own ventilation order & set point.

6.- Master/Slave Cooling / Heating. Each unit is standalone but they have to have the same running mode as the master

7.- Back-Up mode. One is the back-up unit and will operate if any of the other unit has a failure.

8.- Rolling Back-up mode. Same as above, except the

«back-up» unit will be different each Tuesday.

For 7 and 8, after 15 min above or below the limits, the back-up unit will start.

1. DC50

2. DC50 Temperature

3. DC50 Average

4. Master/Slave Temperature

7. Back-up

FAN

MASTER

MASTER

MASTER

STAND ALONE

5. Master/Slave Average

STAND ALONE

6. Master/Slave Cooling/Heating

STAND ALONE

SET-POINT

MASTER

STAND ALONE

STAND ALONE

STAND ALONE

STAND ALONE

STAND ALONE

ROOM TEMP

STAND ALONE

MASTER

AVERAGE

MASTER

AVERAGE

STAND ALONE

COOLING/HEATING

STAND ALONE

STAND ALONE

STAND ALONE

STAND ALONE

STAND ALONE

MASTER

All units are stand alone, one unit is waiting for a failure

8. Rolling Back-up

All units are stand alone; one unit is waiting for

This back-up unit changes every Tuesday

Go to 2700 parameter in the service display. Press (Prg) key in order to see Master/slave status.

18

Connect a 120 ohms

1/4 W end line resistor

ONLY MODBUS

MODBUS protocol

For this option the BM50 must be equipped with the board,

PCO1004850. This card is used to interface BM50 to an

RS485 network. The card guarantees the optical isolation of the controller from the RS485 serial network.

Communications can be configured in the DS50 display through the following parameters:

Communication protocol, set point 3932 = ModBus

Transmission Mode = RTU

Baud Rate = set point 3933 (1200/2400/4800/9600/19200)

Word Length = 8

Parity = NONE

Stop Bits = 2

Device Id = set point 3931 (1 to 200)

LONWORKS protocol

For this option the BM 50 must be equipped with the board,

PCO10000F0

This card is used to interface BM 50 to a LonWorks network, by FTT-10A 78 kbs (TP/FT-10)

Communications can be configured in the DS50 display through the following parameters:

Communication protocol, set point 3932 = LonWorks

Baud Rate = set point 3933 (4800)

Device Id = set point 3931 (1 to 200)

NOTE: The points in writing received from the BMS are taken into account by Climatic only if mode BMS is activated («Watchdog», address 3934)

The BMS mode is activated if the watchdog is different from zero

(DS50 address 3934, Modbus analogical item 1, Lonworks address

I_Sp_BMS_Dog).

Every second, the Climatic 50 decreases the value of this address by 1. If this address reaches zero, then the Climatic 50 works as a stand alone unit in order to check continuously the communication with BMS. Normally, the BMS has to send a value to this address regularly (example 255 every 4 min).

BE50 EXPANSION MODULE

BE50 expansion module is available as an option. It is placed in the electrical box to get an extra number of inputs and outputs.

This option is need with TCB for Voltage free contact, exhaust fan and enthalpic free cooling.

4 Digital outputs 4 Analogical inputs

BE 50

4 Digital inputs

With BE50 as option, next inputs and outputs can be available:

DIGITAL OUTPUTS:

It is possible to use four digital outputs as:

1.-Filter alarm

2.-Fan alarm

3.-Compressor alarm

4.-Electrical heater alarm

5.-Freeze alarm

6.-Smoke alarm

7.-Heating mode

8.-Zone A

9.-Zone B

10-Zone C

11.-Unnocupied

12.-BMS

13.-Free

Exhaust fan as an option uses 2 digital outputs for units with 2 exhaust fans and 1 digital output for units with only one exhaust fan.

ANALOGIC INPUTS:

Four analogic inputs are available with BE50 option.

TCB option, uses 2 analogic inputs and Enthalpic free cooling uses other 2 analogic inputs.

If the unit does not operate with these options, we can configurate analogic inputs as:

1.-4-20mA signal in order to adjust minimum fresh air.

2.-4-20mA signal to adjust the set point of ambient temperature.

3.-Additional temperature sensor (with BMS configuration).

4.-Additional Humidity sensor (with BMS configuration)

DIGITAL INPUTS:

It is possible to use four digital inputs as:

1.-Electrical heaters disabled.

2.-Cooling mode disabled.

3.-DeHeating mode disabled.

4.-Unnocupied.

5-Electrical heaters and compressor disabled.

6.-Compressor disabled.

7.-0% Fresh air

8.-10% Fresh air

9.-20% Fresh air.

10.-30% Fresh air

11.-40% Fresh air

12.-50%Fresh air

14.-Fee

A remote control of the unit can be possible using the inputs 1,2 and 3, and in addition the Remote on/off

(available as standard in the unit).

Cooling mode: Use «Heating mode disabled» input.

Heating mode: Use «Cooling mode disabled» input.

Auto: Use»Cooling mode disabled» and «Heating mode disabled» inputs.

Electrical heater: Use «Electrical Heaters disabled» input

ON/OFF: With remote on/off in the unit.

Note: See electrical drawing in the unit for the connections.

19

CONTROL SOFTWARE FEATURES

CAPACITY FACTOR

It is used to determine the exact capacity required at any time in order to react quicker an more accurately to any change in demand.

The capacity factor is a percentage of the total cooling or heating capacity.

The capacity factor will increase, decrease or freeze depending on the temperature difference between the set point and the room temperature is changing.

D Room Temp / Set Point

+4

+2

0

-2

-4

CAPACITY

FACTOR IS

FROZEN

CAPACITY

FACTOR

IS DECREASED

(REDUCE

CAPACITY)

D Room Temp / Decreasing

CAPACITY

FACTOR

IS INCREASED

(ADD CAPACITY)

CAPACITY

FACTOR IS

FROZEN

Room Temp / Increasing

Example: The room set point is 25ºC with a 3 compressor unit.

D T

Set point-Ambient Temp.

Ambient

Temperature

+2

+1

0

-1

0

0

+1

+2

+3

Increasing

Increasing

Increasing

Increasing

Decreasing

Decreasing

Decreasing

Decreasing

Increasing

Capacity factor

0%

35%

70%

100%

100%

100%

100%

60%

60%

COMP.1 COMP.2

OFF

ON

ON

ON

ON

ON

ON

ON

ON

OFF

OFF

ON

ON

ON

ON

ON

ON

ON

COMP. 3

OFF

OFF

OFF

ON

ON

ON

ON

OFF

OFF

REACTIVITY

The reactivity determines how fast the capacity factor should vary. It is given in: Percentage of capacity/Degree ºC.

Example: If the reactivity is set to 3%/ºC/min. Then: Capacity factor can go from 0 to 30% in 10 minutes if Delta Room temperature VS Set Point is 1ºC.

Or capacity factor will go from 0 to 60% in 4 minutes if

Delta room temperature VS Set point is 5ºC.

The reactivity can be adjusted with the CLIMATIC 50.

The larger the reactivity the faster the unit will react to a change.

The next table shows the effect of a change of reactivity on the capacity factor: This shows that by increasing the reactivity, the unit reaches the set point quicker but the energy consumption (capacity factor) is larger.

REACTIVITY:3

D T +5

D T +3

D T +1

15%

9%

1%

1 MIN

75%

45%

15%

5 MIN

100%

90%

30%

10 MIN

REACTIVITY:6

D T +5

D T +3

D T +1

30%

8%

2%

1 MIN

100%

90%

30%

5 MIN

100%

100%

60%

10 MIN

TIME ZONES AND SCHEDULING

With the CLIMATIC 50 the scheduling has been completely reviewed. It has been done with comfort display DC50 or with service display DS50.

SET POINTS

PER ZONE

AMBIENT TEMPERATURE

Average set point

Minimum fresh air

Dynamic set point

Cooling set point

Heating set point

Heating priority

FRESH AIR REHEAT

Activated

Heating priority

AUTHORIZATION

Fan mode On/off

Fan dead

Fresh air

CO2

Mechanical Cooling

Mechanical heating

Electrical heater

Low noise

SCHEDULING

Start unoccupied zone

Start zone A

Start zone B

Start zone C

CODE

3331

3332

3211

3212

3213

3214

3311

3312

3321

3322

3323

3324

3341

3342

3343

3344

3345

3346

3347

3348

COMFORT

DISPLAY DC50

SERVICE

DISPLAY DS50

YES

YES

YES

YES

YES

YES

Example of Zone setting:

Monday

Tuesday

Wed.

Thursday

Friday

Saturday

Sunday

Unnoc.

FA FB FC

Each zone is determined by its starting zone.

Unnoc.

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

ANTICIPATION

This allows an anticipated start-up in the morning depending on the outdoor temperature.

This function only works for zone A.

It allows the machine to move from unoccupied zone to zone A earlier. If the outdoor temperature is under a certain value.

This will allow the unit to anticipate a cool day.

This can be adjusted with set point 3221 and 3222.

3321-bottom of the slope (°C), Anticipation starting point.

3322-Slope in Minutes of anticipation per degrees (min/ºC).

Example:

Anticipation temperature: 10ºC

Outside air temperature: 4ºC

Anticipation slope: 5 min/ºC

Zone A starting: 06:00

If outside temperature is 0°C, the zone

A will start at 05:30 hours.

20

CONTROL SOFTWARE FEATURES

FREE COOLING

Free cooling is a saving system in the cooling mode, this makes the unit take air from the outside to take advantage of its energy. This system works as first cold stage.

There two main parameters for free cooling control:

Type of free cooling (3822)

0 = No

1 = Thermostatic

2 = Enthalpic

3 = Enthalpic + CO2

Regulation mode (3823)

0 = No (all return air)

1 = 100% (all fresh air)

2 = 0-100% (regulation between 0 and 100%)

3 = 0-50% (regulation between 0 and 50%)

For free cooling enable, next situations has to be right:

-1, 2 or 3 for the type of free cooling and regulation

0-100% or 0-50% have been selected.

-There is no fan alarm or smoke/fire alarm.

-Unit is working on cooling mode.

-Fresh air has to be enable for the time zone.

Free cooling is working if:

Thermostatic free cooling:

-Outdoor temperature (OS sensor) is lower than indoor room temperature (AS or RS sensor)

(differential 0’5ºC)

-Outdoor temperature (OS sensor) is higher than

3511 parameter (-20ºC differential 1ºC)

Enthalpic free cooling:

Enthalpic free cooling is working when the first conditions are right and in addition outdoor absolute

Humidity (OS HR/T sensor ) is lower than room absolute humidity (AS HR/T) (differential 0’4 g/Kg)

Free cooling regulation

If free cooling conditions are favorable, the control calculates the cooling capacity needed from the free cooling in cooling mode. The free cooling works as first step of capacity.

Fresh air damper will open and close according to the minimum air discharge temperature (DS sensor ) and return air temperature (DS sensor). The minimum discharge temperature is the parameter value 3363+2ºC.

Exhaust fan

For units with two exhaust fans, one starts up if besides to be activated the exhaust fan (parameter 3513), the overpressure damper is located in the damper position 1

(3514) and the second starts up when the overpressure damper of this one is located in the damper position 2

(3515). For the units with an exhaust fan, this one starts up if the exhaust fan is activated and the overpressure damper is located in the damper position 1.

21

Minimum fresh air

In the situations that are not activated free cooling, the fresh air damper is located on renovation air position.

Two possibilities of fresh air damper adjustment exist, with or without damper calibration.

1.-Without damper calibration:

Minimum position of the fresh air damper:

It will be the one of greater opening of the following conditions:

-Value of the set point of the minimum fresh air for each time zone (parameter 3312)

— According to digital input of the expansion module BE50 activated (See description Expansion module BE50)

— With Air quality probe CO2 activated in each time zone according to the following picture:

Fresh air

Maximum fresh air

(3512)

Minimum fresh air

(3312)

Min CO

2

1000ppm

(3516)

Max CO

2

1500ppm

(3517)

CO

2

Fresh air damper totally opened:

The fresh air damper is opened completely if:

-The smoke alarm is activated

-100% fresh air is activated with the digital input of BE50

— The value of the parameter 3823 is 1 (all fresh air).

Fresh air damper totally closed:

The fresh air damper is closed completely if:

— The fan alarm is activated.

— The temperature of discharge air low.

— The digital input of air fresh damper closed in the module of expansion BE50 is activated.

— The unit is working on heating mode and return temperature is return is lower than 12ºC (differential 0’5ºC).

2-With damper calibration:

When free cooling is disabled, the fresh air damper is in the minimum position. It is possible to calibrate this damper in order to introduce the quantity of fresh air like minimum air, with a better adjustment.

It can be enabled with the parameter 3516. To be able to calibrate the following conditions are needed:

-Minimum fresh air higher than 6%.

-Temperature difference between return and fresh air is higher than 6ºC.

-The fan is working during 6 minutes and without any other device working.

-Free cooling is disabled.

For that conditions it calculates the temperature of the theoretical mixture (fresh air+ return air ) and moves the damper until discharge temperature (DS sensor) is equal to calculated as the temperature of mixture.

CONTROL SOFTWARE FEATURES

DYNAMIC SET POINT

This feature allows the set point to change according to the outside temperature.

Example:

If the set point is 25°C

And the dynamic set point is set to 6°C

Then, when the outdoor temperature reaches: 31°C (25°C + 6°C) the set point will follow the outdoor temperature with a 6°C temperature difference.

If you do not want to use this feature, set the dynamic set point to 99 (factory setting at 99).

ON/OFF CONDENSING PRESSURE CONTROL

For cooling only units or cooling mode (heat pump units) there is a regulation of the condensing pressure through the pressure transducer PT. See the picture below:

Outdoor fan

High speed

( connection)

Low speed

( connection)

Off

11 bar 12 bar

19 bar 20 bar

Condensing

Pressure

On heating mode, with outside temperatures higher than

6ºC the outdoor fan is working with low speed (star connection) and with outside temperatures lower than 6ºC

the outdoor fan is working with high speed (triangle connection). Differential 1ºC.

PROPORTIONAL CONDENSING PRESSURE

CONTROL

For cooling only units or cooling mode (heat pump units), there is a regulation of the condensing pressure through the pressure transducer PT. See the picture below:

Voltage

100%

80%

40%

11 bar 12 bar 14 bar 18 bar 19 bar 20 bar Condensing Pressure

On heating mode (heat pump units), with outside temperatures higher than 6ºC the outdoor fan voltage will be 70% and with outside temperatures lower than 6ºC the voltage will be 100%. Differential 1ºC.

22

REHEATING MODE

This control feature can be activated (parameter 3331) that allows to regulate the operation of the unit and electrical heater in the dead zone of the Set point according to the discharge air temperature in order to prevent cool air inside the room.

It leaves the factory disabled.

DEFROST

The defrost process is activated during heating mode in heat pump units, when the outside temperature is low and the outdoor coil could become frozen.

Two types of defrost cycle can be possible, dynamic and cyclical.

They can be selected through 3621 parameter. The units leave the factory with dynamic defrost selected.

1.-Dynamic: The unit works according to the outside conditions, the time between two defrosts changes depending on the frequency with which they are made such.

2.-Cyclical: The time between two defrosts is a fixed time.

Defrost operatation mode:

Time between defrost cycles:

-Minimum time between defrost cycles (parameter 3624) is 30min.

-Maximum time between defrost cycles (parameter 3625) is 60 min.

-Reduction time (parameter 3626) is 3 min.

With these values the first defrost cycle starts:

Cyclical: Each 45 min (máx+min)/2

Dynamic: The first at the 45 min (máx+min)/2 and the following ones increasing or decreasing 3 min based on the frequency, until it reaches maximum or minimum value.

Beginning of defrost cycle:

The beginning of the defrost cycle is made based on the evaporation pressure (parameter 3622). Below this value the defrost cycle can start if the minimum time between defrost cycle has occurred.

Defrost cycle:

If the unit has electrical heater as option, the electrical heater starts up in the defrost cycle. This one works according to the discharge temperature (DS sensor). If discharge temperature is lower than the set point, electrical heater remains connected and if the temperature is higher than the set point electrical heater is disconnected.

In order to make defrost cycle, the control will stop the compressor and outdoor fan, after that it changes four way reversing valve and next it again starts up the compressor.

End of defrost cycle:

When the pressure for the end of defrost cycle is reached

(parameter 3623) 24 bar or the security time is reached

(parameter 3627) 6 min, the defrost cycle will finish.

Outdoor fan will start up, the compressor will stop, after that the control changes four way reversing valve and at the end the compressor starts up again.

With electrical heater as option it will be disconnected.

CONTROL SOFTWARE FEATURES

PROTECTION

Air differential pressure transducer-DPT

It measures pressure difference between the air inlet to the unit and the outlet air to the coil.

A

B

Factory regulation

Parameter

Cause

Alarm number

Effect

25

PRESSURE DIFFERENCE (A-B) in Pa.

100 300

3411

Belts broken

1

3412

Low air flow

5

3413

Dirty air filter

4

Unit OFF

Prg lits red in DC50 and «Alarm» in DS50

Prg lits red in DC50 and «Alarm» in DS50

Anticycle

There are two different time options:

— Time between two compressors starting (3631) factory setting at 360 minutes.

— Minimum time to stop the compressor (3632) factory setting at 240 minutes.

Both of them do not operate during defrost cycle.

Indoor fan, exhaust fan, outdoor fan and electrical heater start up with an interval of one second between each of them.

Time between compressor starting: 15 seconds.

Air discharge temperature

It is measured by DS sensor.

Minimum Tª 1 (3363)

(6ºC)*

Minimum Tª 2 (3364)

(4ºC)*

Minimum Tª 3 (3365)

(2ºC)*

Maximum Tª 1 (3366)

(40ºC)*

Maximum Tª 2 (3367)

(60ºC)*

COOLING

More than 30″. One step is disconnected

Capacity steps off

Fan stops

N/A

N/A

HEATING

N/A

N/A

N/A

More than 30″. One step is disconnected

Capacity steps off

FREE COOLING ALARM

N/A

Damper closed

Damper closed

N/A

N/A

22

12

*Temperatures without hot water coil as option. With hot water coil as option, these temperatures has to be increased

4ºC.

Outside temperature

3361 parameter values can be changed in order to modify outside temperature values. Depending on that values the unit can start up or stop on cooling and heating mode.

Find below the values:

Cooling 50 (5ºC)

Cooling 100 (0ºC)

Heating 100 (-10ºC)

If outside temperature is lower than 5ºC, only half capacity steps can operate. If outside temperature is lower than

0ºC the unit can not work on cooling mode.

If outside temperature is lower than -10ºC the unit can not operate on heating mode.

Note:

-Cooling limits are ignored by the control if proportional

CPC is included. (3651 parameter value).

-If outdoor temperature is lower than parameter values

3710 and 3720 (Electrical heater and hot water coil limits), electrical heater and hot water coil can not operate.

(standard value 10ºC).

-If outdoor temperature is lower than 3510 parameter value, free cooling option can not operate on cooling mode. (standard value -20ºC).

23

NOTES

24

NOTES

25

NOTES

26

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COD: MUL34E-0805 09-2005

Due to Lennox’s ongoing commitment to quality, Specifications, Ratings and Dimensions subject to change without notice and without incurring liability.

Improper installation, adjustment, alteration, service or maintenance can cause property damage or personal injury.

Installation and service must be performed by a qualified installer and servicing agency.

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