Lennox CWC 090-4P, CWC 070-4P, CWC 090-2P, CWC 070-2P Maintenance 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

5 5

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

5 5

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 070-4P

CWC 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

5 5

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 070-4P

CWC 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

5 5

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