Lennox SNE 2 User manual

PRODUCT RANGE

UNIT V / Ph / 50 Hz NOMINAL

CAPACITY W

10.700

13.600

3,18

3,82

400 V - 3Ph

230 V - 3Ph

400 V - 3Ph

NOMINAL

CONSUMPTION KW

230 V - 1Ph

230 V - 3Ph

230 V - 1PhSNE 2,8K 8.300 2,68

SNE 4K

SNE 3K

CONTENTS

• PRODUCT RANGE

• GENERAL DESCRIPTION

• SPECIFICATIONS

• ELECTRICAL CONNECTIONS

• FANS SPECIFICATIONS

• FUNCTION LIMITS

• TABLE OF CAPACITIES

• CONSUMPTION AND DROP WATER

• UNIT DIMENSIONS

• INSTALLATION

• MAINTENANCE OF THE UNIT

• OPTIONS

• POINTS TO KEEP IN MIND

• NOTES

PAGE

13-14

TABLE

Congratulations, you have made a wise choice the purchase of this product. This product

has been designed, assembled and supplied in one of our world class manufacturing

facilities and we feel that it will meet your expectations.

GENERAL INFORMATION

The air conditioner, horizontal compact, water condensed type SNE, are specially design for small and average

installation, office, house etc..

On standard version cools, heats, dehumidifies, cleans and filter the air. The option of easily incorporating an

electric heater or hot water coil to be able to work as heating

The unit includes condenser plate, compact and

resistant made on inoxidable steel, specially selected

for this type of unit.

The cabinet is made of electrozinced steel with epoxy

painted finish and finished on polyester powder. Its

compact dimensions and features allow the unit to

be positioned in almost any location.

Internally the unit incorporate thermal acoustic

insulation to reduce sound level.

Made of copper tubing with aluminium swirl fins, they

are designed and specially dimensioned to obtain

the maximum output

The units include a centrifugal three speed motor fan,

with a motor directly fitted, with high performance on

air flow.

A polypropylene washable air filters are incorporated

in the unit they are easy accessible for maintenance

• Electrical heater mounted on fan discharge.

• Hot water coil.

• Presostatic valves regulating water flow

• Discharge plenum

• Admission plenum

• Digital thermostat programmable.

COMPRESSOR

CONDENSER

AIR FILTER

COOLING CIRCUIT

HEAT EXCHANGER

CABINET

FAN

OPTIONS

Made of welded dehumidifying copper tube with

access connections. Includes dehydrator filter, liquid

recipient expansion system and high and low

pressostat on all models

The electrical panel includes a printed board,

necessary for installation, and plate circuit board

ready to control the unit, which incorporates defrosting

timer thermostat. The power supply of the unit may

turn be off by a fusses block on the electrical box.

The function of the unit is controlled by cable

thermostat.

Digital remote controller by cable at 24V, digital

selector temperature which permit to choose the

following function:

• Selection ON/OFF

• Three functions mode: cool, heat and fan operating.

• Two options fan operating: AUTO (automatic) which

Select turn on and stop automatically fan mode

temperature. On mode ON the fan doesn´t stop

even when temperature is selected.

• Selector three steps fan.

REMOTE CONTROL

One compressor of the hermetically sealed type

cooled with internal thermal insulation. It is mounted

on vibration-absorbent blocks both on the inside and

outside, statically and dynamically balanced. In all

cases the compressors are acoustically isolated,

resulting in silent operation.

ELECTRICAL CIRCUIT

m /h

230V /1Ph

230V / 400V 3Ph

NOMINAL ABSORBER POWER

Kw.

Compressor

Indoor fan

RUNNING CURRENT

Nominal running current

TOTAL

Kw.

14,0

2,78

0,40

3,18

9,5/5,5

VOLTAGE

17,4

Maximum running current 18,0

16,0/10,0

23,0

A91

78 / 39

Starting current

3,42

0,40

3,82

11,5/6,8

20,0/12,0

106 / 53

2,50

0,18

2,68

SPECIFICATIONS

Total cooling capacity

Nominal absorber power

Chilled water flow rate

Chilled water pressure drop

Hydraulic connections

Sound level (LP)(2)

Dimensions

l/h

W (*)

KPa

dB(A)

(mm)

Large

(mm)

SNE 4KSNE 3K

Air flow (max./min.)

Available static power. (1)

Net weight

13.600

3,82

SNE 4K

SNE 3KSNE 2,8K

3000

120

1125

635

515

2050/1450

1" G

SNE 2,8K

10.700

3,18

100

2390

110

1125

635

515

2050/1100

3/4" G

8.300

2,68

120

1885

100

1125

635

515

1800/950

3/4" G

(*) Inlet air temperature: 27ºC DB / 19ºC WB

Inlet/Outlet water temperature: 30ºC / 35ºC

(1) With minimum air flow admissible 

(2) Sound level has been tested at a distance of 2m from the unit.

UNIT

ELECTRICAL SPECIFICATIONS

ELECTRICAL CONNECTIONS

E G HA B C D F

1 4 6 75 82 3 9 10 11 12 13 THERMOSTAT

PCB (Electronic)

Supply power

SNE 2,8K-3K-4K

400V/50HZ 3Ph + N + PE

FUSES

230V/50HZ 1Ph + N

FUSES

230V/50HZ 3Ph

6 X 1,5mm

Power supply

Thermostat connections

3 X 4mm

4 X 6mm

5 X 4mm

3 X 4mm

4 X 4mm

5 X 2,5mm

MODEL VOLTAGE

50Hz

SNE 2,8K

Nº OF CABLES X SECTION

230 V / 1Ph

SNE 3K

230 V / 1Ph

230 V / 3Ph

400 V / 3Ph

SNE 4K 230 V / 3Ph

400 V / 3Ph

ELECTRICAL WIRING DIAGRAM

FOR ELECTRICAL CONNECTION

REFER TO WIRING DIAGRAM IN

THE UNIT

FAN SPECIFICATIONS

HIGH SPEED

AVERAGE SPEED

LOW SPEED

HIGH SPEED

AVERAGE SPEED

LOW SPEED

HIGH SPEED

AVERAGE SPEED

LOW SPEED

m /h

Unit leaves factory connected in AVERAGE and HIGH Speed.

m /h

Unit leaves factory connected in AVERAGE and LOW Speed

m /h

Unit leaves factory connected in HIGH and AVERAGE Speed.

100

120

1400

20 40

--- --- ---

---

SNE 2,8K

------ --- ---

1250 12251200

1150 ---1075 950 ---

1800 16501550

1425 97513001150 ---

100

120

1400

20 40

1840 17001575

1375

SNE 3K

---1275 --- ---

2000 18501700

1550 ---13751100 ---

2050 19251775

1625 ---14501250 ---

100

120

1400

20 40

1840 17001575

---

SNE 4K

------ --- ---

2000 18501700

1550 ------ --- ---

2050 19251775

1625 ---1450 --- ---

AIR FLOW

AVAILABLE STATIC PRESSURE

Pa.

AIR FLOW

AVAILABLE STATIC PRESSURE

Pa.

AIR FLOW

AVAILABLE STATIC PRESSURE

Pa.

WB.: Temperature Wet bulb

DB.: Temperature Dry bulb

OPERATING LIMITS

-- /21ºC

32ºC / 38ºC

19°C / 14ºC 32°C / 23ºC

Inlet/outlet water

temperature to outdoor

section

Inlet air temperature to indoor section DB/ WB

COOLING CAPACITY

INLET AIR

TEMPERATURE TO

INDOOR UNIT

COOLING

CAPACITY

IN kW

CONDENSING TEMPERATURE CONDENSING TEMPERATURE

INLET AIR

TEMPERATURE TO

INDOOR UNIT

COOLING

CAPACITY

IN kW

CONDENSING TEMPERATURE

DB: Dry Bulb

WB: Wet Bulb

TOTAL CAPACITY

SENSIBLE CAPACITY

COEFFICIENTS OF CORRECTION OF COOLING CAPACITY

AIR FLOW

MODELS SNE

2,8 3

1550 1700

AIR FLOW IN M3/H

SNE 2,8K

1700

SNE 3K SNE 4K

MAX. NOMINAL MÍN. MAX. NOMINAL MIN. MÁX. NOMINAL MIN.

1,02

1,06

0,90

0,81

1,03

1,08

0,90

0,82

1,03

1,07

0,98

0,96

Data based on the following air flow:

Data of cooling capacity rated on tables are calculated for nominal air flow, for minimum /maximum air flow, you

must follow the following table

7,53

5,52

8,17

5,93

8,85

6,33

9,60

6,36

10,39

6,73

45°C 50°C40°C

35°C

7,21

5,36

7,83

5,77

8,49

6,16

9,20

6,19

9,97

6,57

5,04

7,13

5,44

7,74

5,83

8,40

5,86

9,10

6,23

6,89

5,20

7,48

5,61

8,12

6,00

8,80

6,03

9,54

6,40

55°C

6,24

4,88

6,78

5,28

7,36

5,67

7,99

5,69

8,65

6,05

21°C DB

15°C WB

24°C DB

17°C WB

27°C DB

19°C WB

29°C DB

21°C WB

32°C DB

23°C WB

TOTAL

SENSIBLE

TOTAL

SENSIBLE

TOTAL

SENSIBLE

TOTAL

SENSIBLE

TOTAL

SENSIBLE

7,84

5,68

8,50

6,09

9,21

6,49

9,98

6,53

10,81

6,90

30°C

9,80

7,13

10,65

7,66

11,58

8,18

12,58

8,24

13,66

8,74

45°C 50°C40°C

35°C

9,40

6,93

10,23

7,46

11,13

7,97

12,10

8,03

13,14

8,52

8,61

6,53

9,38

7,05

10,21

7,56

11,11

7,62

12,08

8,10

9,01

6,73

9,81

7,26

10,67

7,77

11,61

7,83

12,62

8,31

55°C

8,20

6,33

8,94

6,85

9,74

7,36

10,61

7,41

11,54

7,89

10,19

7,33

11,07

7,86

12,02

8,38

13,06

8,45

14,18

8,95

30°C

12,36

8,49

13,41

9,05

14,54

9,60

15,77

9,69

17,08

10,21

45°C 50°C40°C

35°C

11,84

8,20

12,85

8,76

13,95

9,31

15,13

9,39

16,40

9,90

10,82

7,66

11,76

8,21

12,78

8,74

13,87

8,81

15,04

9,31

11,33

7,92

12,30

8,48

13,36

9,02

14,50

9,10

15,72

9,60

55°C

10,32

7,40

11,23

7,94

12,20

8,47

13,25

8,53

14,37

9,03

21°C DB

15°C WB

24°C DB

17°C WB

27°C DB

19°C WB

29°C DB

21°C WB

32°C DB

23°C WB

TOTAL

SENSIBLE

TOTAL

SENSIBLE

TOTAL

SENSIBLE

TOTAL

SENSIBLE

TOTAL

SENSIBLE

12,89

8,78

13,98

9,35

15,14

9,91

16,41

10,00

17,77

10,52

30°C

SNE 2,8K SNE 3K

Nominal capacity established on following conditions:

• Air inlet temperature : 27ºC DB/19ºC WB

• Inlet/outlet water temperature: 30ºC/35ºC

• Condensing Temperature between 40 and 45ºC depending on models

SNE 4K

1000 1500 2000 2500 3000 3500 4000 4500 5000

100

WATER FLOW (L / H)

WATER PRESSURE DROP Kpa

10 15 4520 25 30

TABLE OF WATER CONSUMPTION ON UNITS SNE (L/H) (*)

DIFFERENCES BETWEEN:

CONDENSATION TEMPERATURE AND INLET WATER TEMPERATURE (ºC)

35 40

( * ) Inlet air

temperature

27ºCWB / 19ºC DB

SNE 2,8K 3300 1220 235740 520 400 325 270

SNE 3K 4160 1545 300945 670 515 420 350

SNE 4K 4550 1690 3301030 730 560 460 385

COEFFICIENTS FOR DIFFERENT AIR INLET TEMPERATURE.

Coefficients of water consumption

32/23

1,14

21/15

0,88

24/17

0,93

AIR INDOOR TEMPERATURE (WB/DB)

27/19

29/21

1,07

CONSUMPTION AND WATER PRESSURE DROP

UNIT

For different air inlet temperature multiply the

consumption by the coefficent of this table.

Normally, the water condense is used across a cooling tower with water temperature around 30ºC, and water

flow avilable to work the unit with condensation temperature between 40 and 45ºC.

You are able not to use a cooling tower when the unit is near a river etc.. with enough flow and enough quality of

the water. The use of the water must be used always across a previous Analysis of water.

If the water inlet temperature is below 20ºC, It is then necessary to use a regulation valve (Option) to maintain

condensing temperature value between 40 and 45 ºC.

Depending inlet water temperature and condensation temperature needed you will be able to calculate water

consumption following the table below.

WATER PRESSURE DROP

SNE 4K

SNE 2,8K - 3K

DIMENSIONS

515

635

540

529

1125

167,5 300 167,5

264 237

4xFILTERS OF 300x270

243,5

63,5

607

172

515

317

270

635

Possibility to change the situation of the electrical box tacking

out the screw of the tape as shown in the figure, for an easy

access depending on the installation of the unit.

Factory position of

the electrical box

Option position of the electrical box

(To change by the installer)

DETAIL A

MOTOR FAN

COMPRESSOR

COIL

4 x AIR FILTER

WATER EXCHANGER

ELECTRICAL BOX (2 possible positions)

DRAIN PAN

INLET/OUTLET WATER (3 possible access)

POWER SUPPLY

MAIN SWITCH

DRAINAGE TUBE O 16mm outdoor

PLENUM OF ADMISSION (OPTION)

PLENUM OF DISCHARGE (OPTION)

Prior to install the equipment make sure of the following points:

• Leave enough space for access to air supply, water section, power supply and outlet condense.

• The water section must have the correspondant valves.

• Easy extraction of the air filter.

• Easy access to lateral panel for easy accessibility to all services of the unit.

• Unit must be mounted with springs.

• The electrical section must be done following legal normative

• Check that the tension is the same as installation place.

• Check the water condense quality, across analysis.

• Keep in mind water inlet temperature of the unit. Temperature below 20ºC you will need a water regulation

pressostatic valve ( element as option) to maintain condensation temperature value between 40 and 45ºC.

• Depending on water entry temperature, you have to calculate the water flow following the consumption table.

• Check that air flow needed correspond for duct installation.

• Keep in mind power supply for maximum consumption for each unit.

• All installation must be carried out by qualified personnel

• Make sure that the unit is completely disconnected from the power supply before carrying out any type of work

on the unit.

Hydraulic circuit:

• Air flow:

• All models include three fan speed motor fan.

• Make the motor fan connections for the fan speed required to adecuate the air flow neded for the

installation

• Drainage tube:

• Use the flexible tube connected to the tray as a drainage tube.

Cause a siphon with this tube in order to avoid the inlet of scents from the installation to the unit.

• Make sure that the water connections are correct, inlet water (down side), outlet water (upper side)

• Fit a water filter in the outlet water connection, the step of the mesh should not be less than 0.5mm, wich

avoid welded and dirty get to the unit.

• If quality of water is not good, may be neccesary to install a decalcified

• Install cut off valves at inlet and outlet water connections, because of in case of repairs, the hydraulic

circuit can be independent.

• Install an adecuate water pump, and all the elements necessaries for the installation.

INSTALLATION

PRE-INSTALLATION

• The unit under supply, have rotating objects and high temperature into the pipe. Make sure to turn off electrically

the unit before to access for maintenance or revision.

• Air filter: Clean the filter (maximum each 6 months), but the clean of the filter depend on the ambient where the

units is working.

• Water filter: Realise a clean of the filter.

• Security elements: The unit include electrical elements of security( Internal thermal protection on the compressor

and motor fan, external thermal protection on the compressor and motor three phase) and cooling elements of

security like high and low pressostat pressure with electrical rearm. If limits of function of the unit is out of conditions

of work, some protections will be display.

LOCALISATION OF PROBLEMS

PROBLEMS CAUSES

SERVICE AND MAINTENANCE

• Cut low pressure (Electrical rearm) (*)

• Cooling capacity low.

• Freeze on coil

• Air in temperature very low

• Defect on refrigerant charge.

Test that the refrigerant is correct.

• Air filter dirty

• low air flow.

• Water temperature is too low

• High water temperature

• Low air flow

• Cut high pressure (Electrical ream) (*)

• High consumption

• Thermal compressor protection cut

(*) Rearm electrically the unit turning off/on, after repair the cause which produce a cut on high and low pressure.

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