Lennox FWCK, FWHK Installation, Operating And Maintenance Manual

Providing indoor climate comfort

FWCK/FWHK

Application guide
Installation, operating and
maintenance manual

MIL101E-0105 12-2009
Original manual translation

1

Congratulations you have made a wise choice. This product has been designed, assembled and supplied

in one of our world class manufacturing facilities and we feel sure that it will meet your expectations.

WARNING: Read this manual before installation, reparation o maintenance works.

• PRODUCT RANGE

• GENERAL DESCRIPTION

• PHYSICAL DATA

• ELECTRICAL SPECIFICATIONS

• ELECTRICAL CONNECTIONS

• OPERATING LIMITS

• FAN SPECIFICATIONS

• CAPACITY TABLES

• CORRECTION FACTORS

• DIMENSIONS

• INSTALLATION

• SERVICE AND MAINTENANCE

• OPTIONS

• POINTS TO KEEP IN MIND

• NOTES

1
2
3
3
4
4
5

6-8

9

10
11-12
13-14
15-16

17

18

INDEX

PRODUCT RANGE

COOLING ONLY UNITS

HEAT PUMP UNITS

400 V - 3Ph

MODEL V / Ph / 50 Hz

NOMINAL CAPACITY kW

10,2

13

2,73

3,47

400 V - 3Ph
230 V - 3Ph

400 V - 3Ph

NOMINAL POWER INPUT kW

230 V - 1Ph

230 V - 1Ph

7,3

1,93

230 V - 3Ph

230 V - 1Ph 8,4

2,38

230 V - 1Ph 5,7

1,5

14,9

4,28

230 V - 3Ph
400 V - 3Ph
230 V - 3Ph

20,1

5,91

4

1,12

COOLING

COOLING

FWCK 04
FWCK 06

FWCK 07
FWCK 08

FWCK 10

FWCK 12

FWCK 16
FWCK 22

230 V - 1Ph

400 V - 3Ph

MODEL V / Ph / 50 Hz

NOMINAL CAPACITY kW

400 V - 3Ph
230 V - 3Ph

400 V - 3Ph

NOMINAL POWER INPUT kW

230 V - 1Ph

230 V - 1Ph
230 V - 3Ph

230 V - 1Ph

230 V - 1Ph

230 V - 3Ph
400 V - 3Ph
230 V - 3Ph
400 V - 3Ph

3,15

3,92

2,22
2,75

1,72

4,83

6,65

12,3

15

8,6

10,4

7

18,5

24,5

5,7

1,42

COOLING

HEATING

COOLING

HEATING

FWHK 04
FWHK 06

FWHK 07
FWHK 08

FWHK 10

FWHK 12

FWHK 16
FWHK 22

230 V - 1Ph

10,2

13

7,3
8,4

5,7

14,9

20,1

4

2,73

3,47

1,93
2,38

1,5

4,28

5,91

1,12

CONTENTS PAGE

Lennox have been providing environmental solutions since 1895, our range of FWCK/FWHK continues to meet the standards that have made
LENNOX a household name. Flexible design solutions to meet YOUR needs and uncompromising attention to detail. Engineered to last, simple
to maintain and Quality that comes as standard. Information on local contacts at www.lennoxeurope.com.

All the technical and technological information contained in this manual, including any drawing and technical descriptions provided by us, remain
the property of Lennox and must not be utilised (except in the operation of this product), reproduced, issued to or made available to third parties
without the prior written agreement of Lennox.

ON / OFF

SET TEMP

HOLD

SWING

DAY

ON TIMER

CLOCK

SLEEP

FAN

OFF TIMER

HOUR MINUTE

MODE

SET CLOCK

MON TUE WED THU FRI SAT SUN

KEYLOCK

TIMER ACTIVE SET TIMER

AUTO

HEAT

HEAT
TEMP.
ROOM
TEMP.

AUTO
COOL
TEMP.

DRY

COOL

SLEEP

SWING

FAN

• Electrical heater mounted on fan discharge.

• Hot water coil (for cooling only units).

• Pressostatic valve regulating water flow for cooling only
models.

• Flow switch.

• Water filter.

• Main switch (not available for 04-06-07 models).

• Compressor acoustic jacket.

•

Three phase protection (three phase units).

GENERAL DESCRIPTION

COMPRESSOR

WATER EXCHANGER

WATER CIRCUIT

COOLING/HEATING CIRCUIT

ELECTRIC CIRCUIT

AIR EXCHANGER

CABINET

FAN

OPTIONS

Made of welded dehumidifying copper tube with access
connections.

Cooling only units (FWCK):
They include dehydrator filter, liquid recipient, and
expansion system, high pressure switch for all models
and low pressure switch for modes 08-10-12-16-22.
Heat pump units (FWHK):
They include thermostatic valve as expansion system,
high and low pressure switches for all models. In addition
they includes a security thermostat for low warter
temperatures, 4 ways valve and liquid recipient.
To work properly in heating mode, the unit includes check
valve, restrictor and filter drier.

The unit leaves the factory with R407C refrigerant.

The electrical box includes all the components and terminal
blocks needed for the installation. It includes a printed
board, starting timer and reversible working mode in heat
pump units. In addition alarm, ON/OFF remote and dry
contact for water pump are available too.
The wired remote control manages the unit.

REMOTE CONTROL

2

The air conditioner, horizontal compact, water condensed type FWCK/FWHK, are specially designed for small and average
installation, office, house, etc.
On standard version the unit cleans, filters, cools and dehumidifies the air (FWCK), and in addition heats if it is heat pump unit
(FWHK). You are able to incorporate option elements such as electrical heater or hot water coil.

The unit includes an exchanger plate, compact and resistant
made on stainless steel, specially selected for this type of
unit.

The cabinet is made of galvanised steel with compact
dimensions and features allow the unit to be positioned in
almost any location.
Internally the unit incorporates thermal acoustic insulation
to reduce sound level.

Made of copper tubing with aluminum 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 (except FWCK/FWHK 22 with belts­pulley), with high performance on air flow.

It includes water threaded connections H-G.
Heat pump units include a differential water switch in order
to stop the unit without water flow.

Rotary compressor for 04 model and Scroll for the rest of
the models, all of them with internal thermic protection. It
is mounted on vibration-absorbent blocks both on the inside
and outside, statically and dynamically balanced.

AIR FILTER

A polypropylene washable air filter is incorporated in the
unit it is accessible for maintenance operations.

The unit includes a wired remote control with LCD display.

OLT-1X Controller

Basic characteristics for the controller:

- 3 fan speeds (High/Medium/Low).

- Different modes of working: Cool, Heat, Auto, Fan and
Dry.

- Sleep mode.

- 7 days programmable timers.

- Real time clock

- Keyblock function

- Alarms display

- Temperature indication ºC ó ºF.

3

MAXIMUM ABSORBED POWER

ELECTRICAL SPECIFICATIONS

kW.

Compressor
Indoor fan

MAXIMUM RUNNING CURRENT

TOTAL

kW.

kW.

2,3

0,33
2,63

2,9

0,33
3,23

3,4

0,46
3,86

4,05
0,46

4,51

4,70

0,83

5,53

5,78
0,83

6,61

A

VOLTAGE

7,60
1,10

8,70

Maximum running current

13,0 16,4 19,5

18,9/9,4

23,3/12,7

23,9/15,5

26,8/16,5

20,8

A

48,6

62,6 78,2

93,2/48,2 102,0/54,0 137,0/70,0 180,5/103,5

97,2

Starting current

PHYSICAL DATA

MODEL

Total cooling capacity

Nominal absorbed power
Cooling

kW (**)

kW (*)

Air flow (max./min.)

20,1
24,5

210

13
15

14,9
18,5

10,2
12,3

8,4

10,4

2350/1000

7,3
8,6

1400/800

5,7

7

FWCK 06
FWHK 06

1550/600

3618

72

168/171

---/56,5

2250/1200 3100/1500 3100/1800 4500/2250

1" G

FWCK 08
FWHK 08

FWCK 10
FWHK 10

FWCK 12
FWHK 12

FWCK 16
FWHK 16

FWCK 22
FWHK 22

FWCK 07
FWHK 07

4

5,7

FWCK 04
FWHK 04

1050/450

Nominal water flow

Water pressure drop

Hydraulic connections

Sound pressure

level (LP) (2)

dB(A)

Dimensions

l/h

kPa

Cooling

(low / high) speed

(mm)

Height
Width

Depth

(mm)
(mm)

Pa

Max. available static pressure(1)

Net weight

Kg

120 120100120100140

2340 26641829150513071019

75 3545836135

147/150

155/158

104/106

101/103

78/80

75/77

47/50 46/4949/5051/5244/4542/49

3/4" G 3/4" G 3/4" G 3/4" G 1" G 1" G

80

713

16

54/56
44/47

440
492

792

3/4" G

Total heating capacity

Nominal absorbed power
Heating

5,91
6,65

3,47
3,92

4,28
4,83

2,73
3,15

2,38
2,75

1,93
2,22

1,5

1,72

1,12
1,42

kW (**)

kW (*)

440
492

792

465
623

1083

505
703

1503

465
623

1083

505
703

1503

505
703

1503

1,4

0,19
1,59

9,7

29,9

FWCK 06
FWHK 06

FWCK 08
FWHK 08

FWCK 10
FWHK 10

FWCK 12
FWHK 12

FWCK 16
FWHK 16

FWCK 22
FWHK 22

FWCK 07
FWHK 07

FWCK 04
FWHK 04

440
492

792

44/47

47/49

51/52

47/50

50/50

46/49

---/56,544/45

Heating

(low / high) speed

Cooling / heating

230V /1Ph

230V / 400V 3Ph

m /h

3

(*) Exchanger air inlet temperature: 27ºC DB / 19ºC WB.
Exchanger water inlet temperature: 30ºC.
(**) Exchanger air inlet temperature: 20ºC DB.
Exchanger water inlet temperature: 20ºC.
(1) With admissible minimum air flow.
(2) Sound pressure level has been tested at a distance of 2 m from the unit, with duct in aspiration and air discharge, normal absorption in

accordance with room size and unit capacity.

DB.- Dry bulb temperature
WB.- Wet bulb temperature

4

Power supply
Thermostat connection
Electrical heater power supply
Connection Electrical heater - control.

2

2
2

2

2

2

2

2

2

2

2

2

2

2

2

2

2

2

2

2
2
2

Electrical heater

ON / OFF

SET TEMP

HOLD

SWING

DAY

ON TIMER

CLOCK

SLEEP

FAN

OFF TIMER

HOUR MINUTE

MODE

SET CLOCK

MON TUE WED THU FRI SAT SUN

KEYLOCK

TIMER ACTIVESET TIMER

AUTO

HEAT

HEAT
TEMP.
ROOM
TEMP.

AUTO
COOL
TEMP.

DRY

COOL

SLEEP
SWING

FAN

(supplied with

the unit)

Length 15m.

4x1mm

2

23

3x1mm

2

ELECTRICAL CONNECTIONS:
Power supply, remote ON/OFF, alarm and
dry contact for water pump.

NOTE: Remote ON/OFF and dry contact for water
pump. Can support 3A for AC3.

ELECTRICAL CONNECTIONS

FOR ELECTRICAL CONNECTION REFER TO WIRING DIAGRAM IN THE

UNIT.

PLEASE, CHECK ELECTRICAL DATA IN ORDER TO SELECT THE

FUSES.

Nº OF WIRES X SECTION

3 X6mm

4 X 6mm
4 X 4mm

4 X 4mm

4 X 6mm

3 X 6mm
4 X 4mm

4 X 2,5mm

1

3 X 4mm

4 X 4mm

5 X 2,5mm

5 X 4mm

4 X 6mm

3 X 4mm
4 X 4mm

5 X 2,5mm

MODEL

FWCK/FWHK 08

FWCK/FWHK

10

FWCK/FWHK

12-16

FWCK/FWHK

22

VOLTAGE

50Hz

230 V / 1Ph
230 V / 1Ph

230 V / 3Ph
400 V / 3Ph
230 V / 3Ph
400 V / 3Ph
230 V / 3Ph

400 V / 3Ph

FWCK/FWHK 04
FWCK/FWHK 06

FWCK/FWHK 07

230 V / 1Ph

230 V / 1Ph

230 V / 1Ph 3 X 2,5mm

3 X 2,5mm
3 X 2,5mm

3 X 2,5mm

3 X 4mm
3 X 4mm

OPERATING LIMITS

WB.- Wet bulb temperature
DB.- Dry bulb temperature

Water inlet temperature

Air inlet temperature into indoor section D.B/W.B

Air inlet temperature into indoor section D.B/W.B

Water inlet temperature

HEATING MODE

(*)

(*)

Up to 35

ºC mimimum or more than minimum water flo

w can be used.

Between 35

ºC and 43ºC nominal or more than nominal water flow can be used.

It is not possible to use minimum water flow for that range of temperatures.

43ºC

1N~230V-50Hz+PE

PE L N 1 2 19 20

ON/OFF

Flow

switch

Dry contact for

water pump

Alarm

12 13

PE

1 2 19 20

ON/OFF

Flow

switch

Dry contact for

water pump

Alarm

12 13

3~230V-50Hz+PE

L1 L2 L3

PE

1 2 19 20

ON/OFF

Flow

switch

Dry contact for

water pump

Alarm

12 13

3N~400V-50Hz+PE

L1 L2 L3 N

INSTALLATION GUIDE FOR CONTROL CABLE (TO AVOID INTERFERENCES):

• Use the screened 15 m cable supplied with terminal (3 wires + screen).

• Wire the cable separated from electrical power wiring by a physical distance of 500 mm.

• Wire the cable separated from halogen lamps/fluorescent tube lighting... by a phyisical distance of 500 mm.

• Wire the cable separated from radio frequency sources such as radio transmitter... at least 500 mm.
NEVER WIND THE REMAINING CABLE AROUND, CUT THE CABLE BY THE TERMINAL END.

Local and national legislation has to be taken into account when the unit will be installed.

1

2

3

4

4

4

1
2

3

COOLING MODE

15ºC

35ºC

21ºC/15ºC 32ºC/23ºC

12ºC

30ºC

17ºC

24°C

5

FANS SPECIFICATIONS

Unit leaves the factory with pulley opened (1-1/2 V) turn.

FWCK/FWHK 22

120

3300

150

3000

180

2750

210

2500

0

4500304200603900903600

3750 3400

4060 3750 3450 3200 2900 2650 2300 ---

2250 --- ---

3100 2800 2550

HIGH SPEED
MEDIUM SPEED
LOW SPEED

HIGH SPEED
MEDIUM SPEED
LOW SPEED

HIGH SPEED
MEDIUM SPEED
LOW SPEED

HIGH SPEED
MEDIUM SPEED
LOW SPEED

HIGH SPEED
MEDIUM SPEED
LOW SPEED

HIGH SPEED
MEDIUM SPEED
LOW SPEED

HIGH SPEED
MEDIUM SPEED
LOW SPEED

Unit leaves the factory with three speeds connected.

Cooling only units leave the factory with three speeds connected. Heat pump units leave the factory with HIGH and MEDIUM speeds connected.

Unit leaves the factory with HIGH and MEDIUM speeds connected (the unit can not work in LOW speed).

Cooling only units leave the factory with three speeds connected. Heat pump units leave the factory with HIGH and MEDIUM speeds connected.

Unit leaves the factory with HIGH and MEDIUM speeds connected.

Unit leaves the factory with HIGH and MEDIUM speeds connected.

Unit leaves the factory with three speeds connected.

m /h

3

AVAILABLE STATIC PRESSURE Pa.

80

1700

100

1350

120

1000

140

---

0

2350202200402050601900

1860 1840 1750 1650

2200 2075 1950 1800

FWCK/FWHK 08

1550 1250 --- --­1375 1050 --- ---

AVAILABLE STATIC PRESSURE

Pa.

80

1500

100

1220

120

---

140

---

0

2250202150402000601800

1850 1820 1700

1525

2100 2000

1875

1675

FWCK/FWHK 10

1400 ---

---

---

1260 ---

---

---

AVAILABLE STATIC PRESSURE Pa.

80

2250

100

2050

120

1800

140

---

0

3100202850402650602450

1900 1800 1700 1600

2450 2300 2150 1975

FWCK/FWHK 12

1800 1600 --- --­1500 --- --- ---

3

m /h

3

m /h

3

m /h

3

m /h

3

m /h

3

3

AVAILABLE STATIC PRESSURE Pa.

AVAILABLE STATIC PRESSURE Pa.

AIR FLOW

AVAILABLE STATIC PRESSURE Pa.

AIR FLOW

AIR FLOW

AIR FLOW

AIR FLOW

AIR FLOW

AIR FLOW

AIR FLOW

80

950

100
800

120

---

140

---

0

1400201300401150601075

---

1100 1050 1000 925

FWCK/FWHK 07

800 --- --- ---

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

80

2250

100

2050

120

1800

140

---

0

3100202850402650602450

1900 1800

2450 2300 2150 1975

FWCK/FWHK 16

1800 --- --- ---

--- --- ---

--- --- ---

FWCK/FWHK 04

80

1150

100

1000

120
800

140
600

0

1550201450401350601250

675 660 650 640

1175 1160 1140 1050

FWCK/FWHK 06

950 790 600 --­625 --- --- ---

80

500

1000

1050209504085060700

750 700 600 500

950 850 750 650 450

---

---

---

---