Lennox CWC 090-4P Instruction manual

WATER
CASSETTE
INSTALLATION-OPERATION
&
MAINTENANCE MANUAL

1
CONTENTS
• PRODUCT RANGE
• GENERAL INFORMATION
• SPECIFICATION
• COOLING CAPACITIES
• HEATING CAPACITIES
• WATER PRESSURE DROP
• ELECTRICAL CONNECTIONS
• UNIT DIMENSIONS
• DRAIN PIPEWORK
• INSTALLATION
• CONTROL PANEL
• INSTALATION OF DIFFUSER AND INLET GRILLE
• MAINTENANCE
• AIR DISTRIBUTION
• OPTIONS
• FAULT ANALYSIS
• POINTS TO KEEP IN MIND
PAGE
2
3
4-5
6
7
8
8
9
10
10-11
12
13
14-15
15
16-17
17
18
TABLE OF CONTENTS
Congratulations, you have made a wise choice with the purchase of your Lennox chilled water ceiling
cassette CWC/CWC-D.
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.
Lennox an international organisation with world wide distribution takes pride in supplying you with this
product.
CONTENTS
• PRODUCT RANGE
• GENERAL INFORMATION
• SPECIFICATION
• COOLING CAPACITIES
• HEATING CAPACITIES
• WATER PRESSURE DROP
• ELECTRICAL CONNECTIONS
• UNIT DIMENSIONS
• DRAIN PIPEWORK
• INSTALLATION
• CONTROL PANEL
• INSTALATION OF DIFFUSER AND INLET GRILLE
• MAINTENANCE
• AIR DISTRIBUTION
• OPTIONS
• FAULT ANALYSIS
• POINTS TO KEEP IN MIND
PAGE
2
3
4-5
6
7
8
8
9
10
10-11
12
13
14-15
15
16-17
17
18
TABLE OF CONTENTS
Congratulations, you have made a wise choice with the purchase of your Lennox chilled water ceiling
cassette CWC/CWC-D.
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.
Lennox an international organisation with world wide distribution takes pride in supplying you with this
product.

2
PACKING CONTENT
Units 2P : 2 pipes system
Units 4P : 4 pipes system
PRODUCT RANGE
MODEL V / Ph / 50 Hz NOMINAL CAPACITY W
6750 9150
8650
230 V - 1Ph
CWC 070-2P 230 V - 1Ph
230 V - 1Ph
230 V - 1Ph
CWC 090-2P
CWC 070-4P
CWC 090-4P
COOLING HEATING
8450
5800
7050
10600
6450
LENNOX
Cassette unit
Difusser Installation manual Hanging bracket insulation
Screws and washers
Setting up
template
(*)
(*) Packed separately
PRODUCT RANGE
MODEL V / Ph / 50 Hz NOMINAL CAPACITY W
6750 9150
8650
230 V - 1Ph
CWC 070-2P 230 V - 1Ph
230 V - 1Ph
230 V - 1Ph
CWC 090-2P
CWC 070-4P
CWC 090-4P
COOLING HEATING
8450
5800
7050
10600
6450
LENNOX

3
GENERAL INFORMATION
The CEILING CASSETTES are designed to operate with chilled and hot water. They
provide both cooling and dehumidification in cooling mode and heating in the latter,
and filtering the air in the process. Electrical heating elements are available as an
option on all units.
The unit chassis is made of galvanised steel and is
fully insulated both inside and out.
Made of copper tubes and aluminium fins. Coils
have been designed and manufactured to ensure
maximum efficiency.
The units are supplied with, two, 3 speed centrifugal
fan. The impellor blades have been designed
specifically for this type of units ensuring
exceptionally low sound levels and the motor is
protected with internal thermal protection.
The air discharge louvres change position in
automatic or manual mode, (according to versions).
In the case that this function has not been
incorporated the position of the louvres can be
adjusted manually.
The unit is designed, with serviceability in mind, and
all components are easily accessible. A drip tray
collects condensate which is removed by means of
a condensate pump.
Made in decorative plastic, with a smooth finish.
Internal insulation prevents condensation from
forming.
Four louvres ensure air distribution.
A polypropylene washable air filter is incorporated
in the unit it is easily accessible for maintenance.
CABINET
ELECTRIC CIRCUITHEAT INTERCHANGE
INTERNAL COMPONENTS
OPTIONSFAN
AIR DISTRIBUTION
The electrical panel is provided with a terminal block
which provides connection of mains power .
- Electric heater.
- Fresh air kit.
Duct connection.
Fresh air fan.
Duct supports.
- Discharge of air to an adjacent room kit.
Duct connection.
Duct supports.
- Water control valve kit with 2 way or 3 way
proportional control valves.
- Auxiliary drip tray.
- Thermostat.
- Float switch.
DIFFUSER PANEL
AIR FILTER
CABINET
ELECTRIC CIRCUITHEAT INTERCHANGE
INTERNAL COMPONENTS
OPTIONSFAN
AIR DISTRIBUTION
The electrical panel is provided with a terminal block
which provides connection of mains power .
- Electric heater.
- Fresh air kit.
Duct connection.
Fresh air fan.
Duct supports.
- Discharge of air to an adjacent room kit.
Duct connection.
Duct supports.
- Water control valve kit with 2 way or 3 way
proportional control valves.
- Auxiliary drip tray.
- Thermostat.
- Float switch.
DIFFUSER PANEL
AIR FILTER

4
m /h
3
(1)Inlet air temperature: 27ºC BS / 19ºC BH
Water temperature: 7/12º C
(2)Inlet air temperature: 20ºC BS
Water temperature: 50º C
(3)Inlet air temperature: 20ºC BS
Water temperature: 70/60º C
(4)Fan high speed.
Power supply 230V-1ph-50Hz 230V-1ph-50Hz
(*)Sound level has been tested at a distance of 2 m from the unit, at standard conditions
6750 8450
kPa(1)
W(1)
l
5190 6600
1160 1450
24 28
CWC 070-2P CWC 090-2P
W(1)
l/h(1)
42 54
9150 10600
kPa(2)
1160 1450
24 28
W(2)
l/h(2)
0.18 0.2
A
A(4)
0.8 0.9
4 4
17.4 17.4
W(4)
KW
14930 17300
kPa(3)
1280 1490
28 29
1400 / 1020 1650 / 1200
W(3)
l/h(3)
F 3/4'' GF 3/4'' G
dB(A)(*)
51/4247/41
Kg
298x1175x575
55
Kg
43 45
HxLxW(mm)
HxLxW(mm)
48x1320x720 48x1320x720
298x1175x575
SPECIFICATIONS
UNIT
Total cooling capacity
Sensible cooling capacity
Chilled water flow rate
Water content
Hot water flow rate
Air flow (max. / min)
Fan power consumption
Running current
Electric heater power consumption
Running current with electric heater
2 PIPES SYSTEM
Hot water flowrate
Hot water pressure drop
Pipe connections
Sound level (Lp)
Diffuser dimensions
Cassette dimensions
Diffuser weight
Cassette weight
Chilled water pressure drop
Hot water pressure drop
Total heating capacity
Total heating capacity
(*)Sound level has been tested at a distance of 2 m from the unit, at standard conditions
6750 8450
kPa(1)
W(1)
l
5190 6600
1160 1450
24 28
CWC 070-2P CWC 090-2P
W(1)
l/h(1)
42 54
9150 10600
kPa(2)
1160 1450
24 28
W(2)
l/h(2)
0.18 0.2
A
A(4)
0.8 0.9
4 4
17.4 17.4
W(4)
KW
14930 17300
kPa(3)
1280 1490
28 29
1400 / 1020 1650 / 1200
W(3)
l/h(3)
F 3/4'' GF 3/4'' G
dB(A)(*)
51/4247/41
Kg
298x1175x575
55
Kg
43 45
HxLxW(mm)
HxLxW(mm)
48x1320x720 48x1320x720
298x1175x575
SPECIFICATIONS
UNIT
Total cooling capacity
Sensible cooling capacity
Chilled water flow rate
Water content
Hot water flow rate
Air flow (max. / min)
Fan power consumption
Running current
Electric heater power consumption
Running current with electric heater
2 PIPES SYSTEM
Hot water flowrate
Hot water pressure drop
Pipe connections
Sound level (Lp)
Diffuser dimensions
Cassette dimensions
Diffuser weight
Cassette weight
Chilled water pressure drop
Hot water pressure drop
Total heating capacity
Total heating capacity

5
m /h
3
(1)Inlet air temperature: 27ºC BS / 19ºC BH
Water temperature: 7/12º C
(2)Inlet air temperature: 20ºC BS
Water temperature: 70/60º C
(3)Fan high speed.
Power supply 230V-1ph-50Hz 230V-1ph-50Hz
(*)Sound level has been tested at a distance of 2 m from the unit, at standard conditions
5800 7050
kPa(1)
W(1)
l
4350 5270
1000 1210
11 25
CWC 070-4PCWC 090-4P
W(1)
l/h(1)
42 54
6450 8650
kPa(2)
555 745
24 17
W(2)
l/h(2)
0.18 0.2
A
A(3)
0.8 0.9
4 4
17.4 17.4
W(3)
KW
1400 / 1020 1650 / 1200
dB(A)(*)
51/4247/41
Kg
298x1175x575
55
Kg
43 45
HxLxW(mm)
HxLxW(mm)
48x1320x720 48x1320x720
298x1175x575
Cold water F 3/4'' G
Hot water F 1/2'' G
SPECIFICATIONS
UNIT
Total cooling capacity
Sensible cooling capacity
Chilled water flow rate
Water content
Heating capacity
Hot water flow rate
Air flow (max. / min)
Fan power consumption
Running current
Electric heater power consumption
Running current with electric heater
4 PIPES SYSTEM
Pipe connections
Sound level (Lp)
Diffuser dimensions
Cassette dimensions
Diffuser weight
Cassette weight
Chilled water pressure drop
Hot water pressure drop
5800 7050
kPa(1)
W(1)
l
4350 5270
1000 1210
11 25
CWC 070-4PCWC 090-4P
W(1)
l/h(1)
42 54
6450 8650
kPa(2)
555 745
24 17
W(2)
l/h(2)
0.18 0.2
A
A(3)
0.8 0.9
4 4
17.4 17.4
W(3)
KW
1400 / 1020 1650 / 1200
dB(A)(*)
51/4247/41
Kg
298x1175x575
55
Kg
43 45
HxLxW(mm)
HxLxW(mm)
48x1320x720 48x1320x720
298x1175x575
Cold water F 3/4'' G
Hot water F 1/2'' G
SPECIFICATIONS
UNIT
Total cooling capacity
Sensible cooling capacity
Chilled water flow rate
Water content
Heating capacity
Hot water flow rate
Air flow (max. / min)
Fan power consumption
Running current
Electric heater power consumption
Running current with electric heater
4 PIPES SYSTEM
Pipe connections
Sound level (Lp)
Diffuser dimensions
Cassette dimensions
Diffuser weight
Cassette weight
Chilled water pressure drop
Hot water pressure drop

6
CORRECTION FACTORS
The given values have been calculated for
a high-speed fan. For a different speed,
the given values must be multiplied by the
following correction factors:
Total cooling capacity W
Sensible cooling capacity W
Room air temperature
with DB ºC
Room air temperature
with WB ºC
Low
speed Medium
speed
Cooling
Capacity
Water inlet temperature ºC
T water ºC
COOLING CAPACITIES
3
4
9 8 7 6 5
10
4
98765 10
11
12 13
3000
22
21
20
19
1817161514
22
21
20
19
18
25
24
23
28 27 26 30 29
4000 5000 6000 7000 8000 9000
4000 5000 6000 7000 8000 9000 10000 11000 12000
070-2P
070-4P
090-4P
090-2P
070-4P
070-2P
090-4P
090-2P
EXAMPLE: For the unit CWC 090-2P with chilled water rise of T = 5
ºC, chilled water temperature 7 ºC and entering air temperature 27
ºC DB/19 ºC WB, according to the diagram the cooling capacity is:
Total cooling capacity = 8450 W
Sensible cooling capacity= 6600 W
To estimate the water flow use the formula Qw=Pt x 0.86
Qw = Water flow (l/h) T
Pt = Total cooling capacity (W)
T = Inlet water temperature - outlet water temperature (ºC)
For the example given Qw =1453 l/h and water pressure drop in page
8 is 28 Kpa.
DB : Dry bulb
WB : Wet bulb
0,8 0,9
COOLING CAPACITIES
3
4
9 8 7 6 5
10
4
98765 10
11
12 13
3000
22
21
20
19
1817161514
22
21
20
19
18
25
24
23
28 27 26 30 29
4000 5000 6000 7000 8000 9000
4000 5000 6000 7000 8000 9000 10000 11000 12000
070-2P
070-4P
090-4P
090-2P
070-4P
070-2P
090-4P
090-2P
EXAMPLE: For the unit CWC 090-2P with chilled water rise of T = 5
ºC, chilled water temperature 7 ºC and entering air temperature 27
ºC DB/19 ºC WB, according to the diagram the cooling capacity is:
Total cooling capacity = 8450 W
Sensible cooling capacity= 6600 W
To estimate the water flow use the formula Qw=Pt x 0.86
Qw = Water flow (l/h) T
Pt = Total cooling capacity (W)
T = Inlet water temperature - outlet water temperature (ºC)
For the example given Qw =1453 l/h and water pressure drop in page
8 is 28 Kpa.
DB : Dry bulb
WB : Wet bulb

7
50
200 800 1600
50403020 60 70
070-4P
070-2P
090-4P
090-2P
40 30 20 10
400 600 1000 1200 1400
5
10
15
20
25
Water pressure drops (Kpa)
(Hot water coil)
Entering water temperature ºC - entering air temperature ºC
Heating capacity (Kw) 1800 2000
070-4P
070-2P
090-4P
090-2P
Water flow (l/h)
Low speed Medium
speed
Cooling
Capacity
80
CORRECTION FACTORS
The given values have been
calculated for a high-speed fan. For
a different speed, the given values
must be multiplied by the following
correction factors:
HEATING CAPACITY
EXAMPLE: For the unit CWC 090-2P, with entering water temperature - entering air temperature equal to 50 ºC
and water flow 1490 l/h in the diagram we get:
Total heating capacity = 17300 W
Water pressure drops = 29 KPa
(high speed fan)
0,77 0,85
HEATING CAPACITY
EXAMPLE: For the unit CWC 090-2P, with entering water temperature - entering air temperature equal to 50 ºC
and water flow 1490 l/h in the diagram we get:
Total heating capacity = 17300 W
Water pressure drops = 29 KPa
(high speed fan)

8
2
3 X 1,5mm
2
3 X 1,5mm
2
7 X 1,5mm 2
8 X 1,5mm
2
3 X 1,5mm
2
7 X 1,5mm
1 1
22
As the percentage of glycol increases the standard pump flow decreases
due to the increased pressure characteristics. This means that the cooling
and heating duties will decrease. As a result the pressure drop must be
multiplied by the coefficient shown in the table below.
2 PIPES SYSTEM 4 PIPES SYSTEM
WATER PRESSURE DROP
Ethylene glycol % Pressure drop
POWER SUPPLY WIRING
This equipment must be installed in accordance with national
regulations. A suitable means of disconnecting all supply
poles must be provided in the power supply wiring. The
power supply must incorporate suitably rated fused or
circuit breaker protection.
MODEL VOLTAGE
50Hz
CWC070-2P /
CWC090-2P
CWC070-4P /
CWC090-4P
230 V / 1Ph
230 V / 1Ph ---- ----
COOL WATER COOL AND HOT WATER
Nº OF WIRES X SECTION
ELECTRICAL CONNECTIONS
10% x 1,07
20% x 1,12
30% x 1,20
5 7 81 2 3
0 1 2 3 42 51 2
230V/50HZ 1Ph + N
4 6
6 7 8
5 7 81 2 3
0 1 2 3 42 51 2
230V/50HZ 1Ph + N
4 6
6 7 8
THERMOSTAT
RC-311-X2
CASSETTE UNIT
Power supply
Thermostat connections
1
1
2
2
CHILLED WATER
CWC 070-4P / CWC 090-4P
CWC 070-2P / CWC 090-2P
CHILLED WATER AND HOT WATER
CWC 070-2P / CWC 090-2P
PRESSURE DROP Kpa
CWC 070-2P CWC 090-2P
800
1100
1000
1200
1300
900
1400
1600
1700
1800
1500
1900
14
16
19
22
19
22
FLOW
RATE
l/h
2000
25
28
32
35
38
---
---
---
---
25
29
31
35
38
42
46
9
11
14
16
1160 24 18
1450 33 28
CWC 070-4P CWC 090-4P CWC 090-4PCWC 070-4P
400
900
500
1000
1200
700
600
800
24
27
COOL WATER HOT WATER
7
9
11
21
15
16
18
PRESSURE DROP Kpa
1100
1300
1400
1500
1600
35
38
14
16
19
32
22
25
28
35
43
53
14
20
27
15
19
24
29
11
34
40
46
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
FLOW
RATE
l/h
555 24--- --- ---
745 --- --- 41 17
1210 16 25 40---
POWER SUPPLY WIRING
This equipment must be installed in accordance with national
regulations. A suitable means of disconnecting all supply
poles must be provided in the power supply wiring. The
power supply must incorporate suitably rated fused or
circuit breaker protection.
MODEL VOLTAGE
50Hz
CWC070-2P /
CWC090-2P
CWC070-4P /
CWC090-4P
230 V / 1Ph
230 V / 1Ph ---- ----
COOL WATER COOL AND HOT WATER
Nº OF WIRES X SECTION
ELECTRICAL CONNECTIONS
10% x 1,07
20% x 1,12
30% x 1,20
5 7 81 2 3
0 1 2 3 42 51 2
230V/50HZ 1Ph + N
4 6
6 7 8
5 7 81 2 3
0 1 2 3 42 51 2
230V/50HZ 1Ph + N
4 6
6 7 8
THERMOSTAT
RC-311-X2
CASSETTE UNIT
Power supply
Thermostat connections
1
1
2
2
CHILLED WATER
CWC 070-4P / CWC 090-4P
CWC 070-2P / CWC 090-2P
CHILLED WATER AND HOT WATER
CWC 070-2P / CWC 090-2P
PRESSURE DROP Kpa
CWC 070-2P CWC 090-2P
800
1100
1000
1200
1300
900
1400
1600
1700
1800
1500
1900
14
16
19
22
19
22
FLOW
RATE
l/h
2000
25
28
32
35
38
---
---
---
---
25
29
31
35
38
42
46
9
11
14
16
1160 24 18
1450 33 28
CWC 070-4P CWC 090-4P CWC 090-4PCWC 070-4P
400
900
500
1000
1200
700
600
800
24
27
COOL WATER HOT WATER
7
9
11
21
15
16
18
PRESSURE DROP Kpa
1100
1300
1400
1500
1600
35
38
14
16
19
32
22
25
28
35
43
53
14
20
27
15
19
24
29
11
34
40
46
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
FLOW
RATE
l/h
555 24--- --- ---
745 --- --- 41 17
1210 16 25 40---

9
Inlet cool water
connection 3/4''G
30
90
Inlet hot water
connection 1/2''G
Outlet cool water connection 3/4''G
Outlet hot water connection 1/2''G
4 PIPES SYSTEM
2 PIPES SYSTEM
575
196
273
Fresh air knockout panel for
branch duct
CASSETTE UNIT
DIFFUSER PANEL
298
37
152
197
Outlet cool water connection 3/4''G
Inlet cool water connection 3/4''G
75
63
24
Drain tube
16 mm O.D.
Condensate pump
flexible hose 10 mm
I.D. 15 mm O.D.
Electrical cable entry point
Branch duct knockout hole, to supply
air into adjacent area
4x Hanging brackets
123
284,8
O 150
251
1140
17,5
29,5 51,9
493,6
527 121 527
1320
720
Auxiliary electrical board Main electrical
board
17,5
UNIT DIMENSIONS (mm.)
143
46,5
O 68

10
2%
2% min.
Máx.200mm
-The unit is fitted with a condensate pump to ensure condensate removal.
-To insure that there is condensate flow, the drain tube must be installed with a fall of 2 % without obstructions,
or without rising sections.
-To avoid any unpleasant odours from the drainage system a trap must be fitted with a trap depth of no less than
50 mm.
-The condensate pump has a maximum lift of 200 mm. The rising tube must always be vertical.
- On completion the drain line must be insulated.
-The drain tube is connected to drip tray.
-This drain tube is supplied with a cap; the cap can be removed when it is necessary to remove any water that
accumulates in the drip tray.
1.The unit should be positioned centrally within the room.
The ceiling must be horizontal to ensure that the unit is
on level. The unit must be installed in a position where
there is sufficient strength in the structure to support the
weight of the unit. The false ceiling must have at less a
height of 308 mm.
2.Ensure there is sufficient space around the unit to service
it. Where there is a false ceiling ensure that there is
enough space to provide access. Where there is a false
panelled ceiling, ensure that there is sufficient space
adjacent to remove the panels.
308
Diffuser panel
Cassette unit
DRAIN PIPEWORK.
INDOOR UNIT INSTALLATION METHOD
CONDENSATE PUMP
FLEXIBLE HOSE
DRAIN TUBE
CONDENSATE PUMP FLEXIBLE HOSE
DRAIN TUBE

11
SETTING UP TEMPLATE
25
25
3.Cut the false ceiling, to a maximum dimension of
625x1225 mm. For a panelled ceiling removes
two panels of 600x600 or one of 600x1200mm.
4.Install the suspension rods to the ceiling, the rods
should have three nuts and two washers, as in
next figure. The setting up template can be used
to indicate the position for the suspension rods.
NOTE: Before marking the fixing points to the ceiling,
ensure that the unit is positioned in the correct
orientation taking into account of where the electrical
cabinet are required. When the unit is fixed it is not
easy to change position.
5.The water connections should be positioned, before
that the unit is installed.
6.When lifting the cassette into position care should
be taken not to lift the unit by, the drip tray, water
connection, drain tube; which could be damaged.
The cassette should be lifted by the hanging
brackets.
The hanging brackets should be insulated, with
the supplied insulation.
7.The cassette brackets hook over the washer.
Tighten the cassette, with the lower nuts
8.Check to ensure the unit is level. The drain will
then automatically be lower than the rest of the
drip tray.
9.Tighten the nuts on the suspended rods to ensure
a distance of 25 mm between the bottom face of
the body of the unit and false ceiling.
Suspension rod
1
2
1
1
2
1
2
Nut
Washer
493,6
55,2
600
1225
1140
42,5 42,5
51,2
INDOOR UNIT INSTALLATION METHOD

12
Cover
plate for
electrical
board
Terminal
plate
cover
Cover plate for
auxiliary electrical
board
WARNING
Electric shock hazard can cause injury or death. Before
attempting to perform any service or maintenance on the
unit, turn OFF the electrical power, and check that the fan
has stopped.
1
3
2
3
CONTROL PANEL
Removing the corresponding plate cover screws gives
access to the electrical board and terminal plate, as indicated
on the drawing.
For electrical connection refer to wiring diagram in the unit.
ELECTRICAL WIRING DIAGRAM
ACCESS TO THE ELECTRICAL COMPONENTS OF THE UNIT
Electrical inlets, power supply and remote
controller.
Terminal plate.
Electrical connections (it depends on versions)

13
Air grille and
filter
Diffuser panel
Display unit
holder
Swing motor
WARNING
Electric shock hazard can cause injury or death. Before
attempting to perform any service or maintenance on the
unit, turn OFF the electrical power, and check that the fan
has stopped.
The diffuser panel is sealed with insulation to avoid air
gaps between the unit and the air panel. The insulation
can be compressed from 8 mm to 3 mm, allowing the panel
to be tightened to the cassette by up to 5 mm.
Insulation
Unit
Fig 1.
INSTALATION OF DIFFUSER AND INLET GRILLE
The display holder includes the infrared receiver (when the remote controller is of this type) and indicators.
(Refer to the corresponding infrared controller manual)
The infrared receiver panel is connected to the electrical board by means of wires.
1. - The display unit holder is mounted by two screws, on any side of the diffuser panel (Fig 1).
2. - The swing motor should now be connected with the power supply wires (it depends on versions).
Check that the position in which the diffuser is mounted is the right one.
1. - Release the air intake grille.
2. - The diffuser panel can then be provisionally positioned on the cassette using the fixing clips.
3. - The diffuser is fastened with the eight bolts supplied.
4. - Make sure that the frame has not been deformed in the installation, by an excessive tighten of the bolts. There
must be no recirculation of air between intake and outlet air paths.
MOUNTING THE DIFFUSER PANEL TO THE UNIT
INSTALLATION OF DISPLAY UNIT HOLDER
MOUNTING THE AIR INTAKE GRILLE AND FILTER ASSEMBLY
The position in which the grill is mounted depends on the position of the display unit holder.
1.- The grill fixing hooks should be fitted into the holes provided.
2.- The stays need to be placed between the diffuser and the inlet grille (Fig 2).
3.- The grille is mounted on the diffuser via two hand triggers. Initially pull off the hand triggers, then insert the grille
into the diffuser and release the hand triggers. When this operation is completed the grille is attached to the diffuser
(Fig 2).

14
WARNING
Electric shock hazard can cause injury or death. Before attempting to perform any service or maintenance on the
unit, turn OFF the electrical power, and check that the fan has stopped.
MAINTENANCE
Access to terminal plate
The terminal plate can be accessed by
removing the air intake grille and unscrewing
the terminal cover. (Fig. 2)
Access to electrical panel
To gain access to the electrical board follow
these instructions:
1.- Disconnect the infrared receiver display
unit (if fitted), and the swing motor wire.
2.- Disassemble the diffuser panel by removing
the screws that attaches it to the unit.
3.- Remove the cover of the electrical panel,
where is the PCB.
Fig 2.
A
HAND TRIGGERS
HOOKS
STAYS
AIR FILTER
AIR INTAKE GRILLE
ELECTRICAL
PANEL COVER
ALWAYS INSTALL THE FILTER
If the unit operates without the filter, there is
a risk of damaging the unit through dust
contamination.
ACCESS TO ELECTRICAL COMPONENTS
(Fig. 2 & 3)
1.- Stop the unit.
2.- Open the air intake grille on the unit.
Open the grille by way of two hand triggers, which are close to
the display unit holder. The grille will swing down supported by
the stays and the hooks.
3.-Relese the air intake grille from de unit.
To release the grille pull it down until the stays can be unlock
from the diffuser, then pull it back to an angle greater of 90º and
lift it lightly, finally the grille hooks will come away from the
diffuser.
4.-Remove the air filter once the air intake grille have been
released
Clean the air filter depending on the operation conditions and
working time, (approximately once every 6 months).
Use a vacuum cleaner to clean dust off. If the filter is too dirty,
wash it with water and neutral detergent. Dry the filter before
re-fitting.
5.-Replace the filter in the right position.
6.- Close the air intake grille.
Place the hand triggers on position again.
CLEANING THE AIR FILTER (Fig. 2)

15
Coil
Fan motor
Condensate pump
Float switch
1
2
3
4
WARNING
Electric shock hazard can cause injury or death. Before
attempting to perform any service or maintenance on the
unit, turn OFF the electrical power, and check that the fan
has stopped.
Louvres change position to distribute air according to
heating or cooling operation.
iIn cooling only mode the louvres are positioned to
distribute air outwards from the discharge, which allow
airflow close to the ceiling.
In heat pump mode the louvres are repositioned to blow
air in a downward direction. The air should flow towards
to the floor to prevent layers or stationary hot air forming
in the upper part of the room.
Louvres can be placed on intermediate positions by using
the remote control; as well the louvres may be set to
move continuously, sweep mode. (For more information,
see the remote control manual.)
DIRECCIONAMIENTO DE AIRE
DRIP TRAY
VOLUTE
MAINTENANCE
1
2
Louvre position for correct air flow in heat
pump mode.
Louvre position for correct air flow in cooling
only mode.
When checking or replacing any internal component
of the unit eg coil, fan motor, condensate pump,
float switch, the drip tray and volute must be removed.
• Remove the air intake grille and filter.
• Disconnect the infrared receiver display unit, and
the swing motor wire.
• Disassembly the diffuser panel by removing the
screws that attach it to the unit.
• Detach the two volutes by removing their screws,
and the two electrical panel covers.
• The drip tray can be taken apart by removing its
screws. As shown in the figure.
IMPORTANT:
Do not try to move the louvres, when
they are connected to a motor.
ACCESS TO INTERNAL COMPONENTS
DISASSEMBLING DRIP TRAY
2
3
4
1
1
2

16
3
m /h
Air flow supplied to an adjacent room in m /h, fresh air fan at high speed.
3
OPTIONAL ELECTRIC HEATER TECHNICAL DATA
(*)Elements included in optional kit
Duct connection Ø150mm
flange and clip (*) Insulated flexible
duct Ø150
Air inlet
grille
Duct connection Ø75 mm(*)
Duct
Ø125mm
Air inlet grille
and filter
Air intake
Fan (*)
Reduction
125-75mm(*)
Branch 150x125(*)
Duct
Ø150mm
POWER
230 V 1Ph -50Hz
230 V / 400 V 3Ph -50Hz
2,5 Kw / 4 Kw
• Remove the 150 mm insulation material and cut out the
prepunched side knockouts. Do not use the same fan to
provide air conditioned to both ducts.
• Cut away the polystyrene around the inside edge of the
opened panel, remove the polystyrene.
• Use a duct connection flange and a suitable duct.
• Air supply to an adjacent room requires that outlet
corresponding with the duct is closed.
• An air inlet grille must be fitted (if possible near the floor)
between the air conditioned room (where the unit is
situated) and the adjacent room.
• Conduits can be of flexible polyester type or corrugate
aluminium, externally covered with anti-condensate
material. The duct length can be calculated by taking
into account the pressure drop through the unit, using
the following table.
• Side knockouts panel are provided. One to connect a fresh air inlet duct, and another to connect an air distribution
duct to deliver air to an adjacent room.
MODELS
OPTIONS
AIR SUPPLY TO AN ADJACENT ROOM
INSTALLATION
INSTALLATION
• Remove the 68 mm insulation material and cut out the
prepunched side knockouts.
• Secure the duct connection flange to the unit. Conduits
can be of flexible polyester type or corrugate aluminium,
externally covered with anti-condensate material.
• Install a supplementary fresh air fan for the introduction
of fresh air into the unit. The fan motor must be controlled
by an ON-OFF switch.
• Fresh air flow must be less than 10% of the total air flow,
to avoid operating problems. A speed controller should
be installed in the supplementary fan motor, for adjusting
the air flow.
Air flow
CWC 070-2P / CWC 070-4P
400
UNIT/MODELS
Available pressure
200 50
010 20
500 250 50
020 30
Pa.
CWC 090-2P / CWC 090-4P
070-2P / 090-2P
FRESH AIR MAKE UP

17
NOTE THE CORRECT POSITION OF THE
WATER CONTROL VALVE
Cool water control valve
NOTE: Proportional valves, must be connected to a proportional
flow regulation control (not included in optional kit)
Water control valve
Auxiliary drip tray
Main cable
2 PIPE SYSTEM
4 PIPE SYSTEM
PROBLEM ACTION
FAULT ANALYSIS
1.- Unit not operating
• Check power is available at unit.
• Check wiring.
• Check remote control is functioning and set properly ( if any).
2.- Indoor unit fans running
too fast without apparent
speed change
• Check the indoor unit filter is clean.
• Check wiring
• If problem persists then motor may be faulty.
3.- Condensate overflowing
• Check drip tray for blockage, and condensate drains away.
• Check unit is level.
• Check condensate pump is working.
• Check service drain pipework.
• Install the auxiliary drip tray as shown in
the illustration.
• Connect the drain tube from drip tray to the
auxiliary drip tray.
• The condensate drains from auxiliary drip
tray will be pumped away.
OPTIONS
WATER CONTROL VALVE KIT (2 AND 3 WAYS, ON/OFF AND PROPORTIONAL)
AUXILIARY DRIP TRAY
Auxiliary drip tray
Hot water control valve
Main cable
Water control valve
(3 ways) proportional
Water connection
Drain tube from drip tray
Connecting
flexible hose
Auxiliary drip tray
Drain tube from
auxiliary drip tray
CAUTION
Connect each valve ON/OFF to
its corresponding connector
(cooling connector and heating
conector

18
The air filter cleaning operations do not
require technical service; however when
an electrical or mechanical operation
is required call an Engineer.
WARNING
Electric shock hazard can cause injury
or death. Before attempting to perform
any service or maintenance on the
unit, turn OFF the electrical power,
and check that the fan has stopped.
FILTER CLEANING
Check the air filter and make
sure it is not blocked with dust
or dirt. If the filter is dirty, wash it in a bowl with neutral
soap and water, drying it in the shade before
inserting it in the unit.
Standard Guidelines to Lennox Refac equipment
All technical data contained in these operating instructions including the diagrams and technical description
remains the property of Lennox Refac and may not be used (except for the purpose of familiarising the user
with the equipment), reproduced, photocopied, transferred or transmitted to third parties without prior written
authorisation from Lennox Refac.
The data published in the operating instructions is based on the latest information available. We reserve the
right to make modifications without notice.
We reserve the right to modify our products without notice without obligation to modify previously supplied
goods.
These operating instructions contain useful and important information for the smooth operation and maintenance
of your equipment.
The instructions also include guidelines on how to avoid accidents and serious damage before commissioning
the equipment and during its operation and how to ensure smooth and fault-free operation. Read the operating
instructions carefully before starting the equipment, familiarise yourself with the equipment and handling of
the installation and carefully follow the instructions. It is very important to be properly trained in handling the
equipment. These operating instructions must be kept in a safe place near the equipment.
Like most equipment, the unit requires regular maintenance. This section concerns the maintenance personnel
and management.
If you have any queries or would like to receive further information on any aspect relating to your equipment,
do not hesitate to contact us.
Risk of injury with
rotating objects
Low
temperatures High temperatures Risk of injury with moving objects Electrical voltage
Abrasive
surfaces
POINTS TO KEEP IN MIND

GREAT BRITAIN,
IRELAND:
BELGIUM :
CZECH REPUBLIC :
FRANCE :
GERMANY:
NETHERLANDS :
POLAND :
PORTUGAL :
RUSSIA :
SLOVAKIA :
SPAIN:
UKRAINE :
OTHER EUROPEAN COUNTRIES,
AFRICA,
MIDDLE-EAST :
LENNOX INDUSTRIES LTD
tél. : + 44 1604 59 9400
fax : + 44 1604 594200
e-mail : marketing lennoxind.com
LENNOX BENELUX N.V./S.A.
tél. : + 32 3 633 30 45
fax : + 32 3 633 00 89
e-mail : inf.beo lennoxbenelux.com
JANKA RADOTIN AS
tél. : + 420 2 510 88 111
fax : + 420 2 579 10 393
e-mail : janka janka.cz
LENNOX FRANCE
tél. : + 33 1 60 17 88 88
fax : + 33 1 60 17 86 58
e-mail : accueil lennoxfrance.com
LENNOX DEUTSCHLAND Gmbh
tél. : + 49 69 42 0979 0
fax : + 49 69 42 0979 40
e-mail : info lennoxdeutschland.com
LENNOX BENELUX B.V.
tél. : + 31 33 2471 800
fax : + 31 33 2459 220
e-mail : info lennoxbenelux.com
LENNOX POLSKA SP z o.o.
tél. : + 48 22 832 26 61
fax : + 48 22 832 26 62
e-mail : lennoxpolska inetia.pl
LENNOX CLIMATIZAÇAO LDA.
tél. : + 351 22 999 84 60
fax : + 351 22 999 84 68
e-mail : marketing lennoxportugal.com
LENNOX DISTRIBUTION MOSCOW
tél. : + 7 095 246 07 46
fax : + 7 502 933 29 55
e-mail : lennox.dist.moscow co.ru
LENNOX SLOVAKIA
tél. : + 421 7 44 88 92 16
fax : + 421 7 44 88 16 88
LENNOX REFAC S.A.
tél. : + 34 902 400 405
fax : + 34 91 542 84 04
e-mail : marketing lennox-refac.com
LENNOX DISTRIBUTION KIEV
tél. : + 380 44 213 14 21
fax : + 380 44 213 14 21
e-mail : jankauk uct,kiev,ua
LENNOX DISTRIBUTION
tél. : + 33 4 72 23 20 14
fax : + 33 4 72 23 20 28
e-mail :marketing lennoxdist.com