FläktGroup Cassette-Geko Operating instructions

Brand: FläktGroup

Model: Cassette-Geko

Category: Split-system air conditioners

Type: Operating instructions

CASSETTE-GEKO ®

OPERATION MANUAL

Cassette-Geko

2FläktGroup DC-2011-0150-GB 2022-07/R10 • Subject to modifications

Product range

Cassette-Geko

FläktGroup DC-2011-0150-GB 2022-07/R10 • Subject to modifications 3

Type code

* applies only to Single or Double units

** on request

Controller location

Control unit

A = Stand-alone controller

Slave unit

D = without controller

Speed levels

Steel electrical cabinet with terminal block*

A = Speed levels 1, 2, 3

Steel electrical cabinet with terminal block

or integrated control system

K = Speed levels 1, 2, 3

L = Speed levels 2, 3, 4

M = Speed levels 3, 4, 5

O = Speed levels 1, 3, 5

S = Min...Max (EC-motor)

Capacity stage

1 = Capacity stage 1

Cassette-Geko ISYteq Control System Valves

G C B 1 . U 0 W .S E 5 A 0 . 0 9 5 . 1 A V R 3 2 5 1 0 .1 1

Air-flow function

S = Single

D = Double

B = Big Single

Unit function

U = Recirculating air unit

Heating / Cooling

only Heating

0 W = Heating water (PWW)

only Cooling

W0 = Cooling water (PKW)

Cooling or Heating

WC = Cooling water (PKW) / Hea-

ting water (PWW)

Cooling and Heating

WE = Cooling water (PKW) +

electric heating

WW = Cooling water (PKW) + Hea-

ting water (PWW)

Electric motor / Thermal contact

0 = AC-motor - Built-in thermal contact

1 = AC-motor - Thermal contact wire

E = EC-motor - Built-in motor protection

Colour

5 = Outlet colour RAL 9003 (white), air outlet louvres RAL

9003 (white)

9** = Colour shade of choice (only outlet design)

Type of control

0 = Terminal block

1 = Module ISYteq 3010

2 = Module ISYteq 3020

3 = Module ISYteq 3030

Control package No.

Controller

1 = CET.ACEC

A = ISYteq LCD IW

B = ISYteq Touch 4.0

Z = without controller

7 = CMT.AC

8 = CMT.EC

E = ISYteq Touch 2.1

F = ISYteq LCD FSE50

Valve actuator

2-pipe system / 4-pipe system

T = Thermoelectric (230 V, 2-point)

Q = Thermoelectric (24 V, 2-point)

R = Reversible (230 V, 3-point)

N = Reversible (24 V, 3-point)

S = Continuous

(24 V, analogue signal 0 - 10 V)

Combination (4-pipe system)

1 = Cooling

Heating

Thermoelectric

(230 V, 2-point)

Reversible

(230 V, 3-point)

2 = Cooling

Heating

Reversible

(230 V, 3-point)

Thermoelectric

(230 V, 2-point)

3 = Cooling

Heating

Thermoelectric

(24 V, 2-point)

Reversible

(24 V, 3-point)

4 = Cooling

Heating

Reversible

(24 V, 3-point)

Thermoelectric

(24 V, 2-point)

Valve combination

2 = 2-way (Cooling), 2-way (Heating)

3 = 3-way (Cooling), 3-way (Heating)

8 = 2-way (Cooling), 3-way (Heating)

9 = 3-way (Cooling), 2-way (Heating)

P = Pressure-independent 2-way valves

(Cooling and Heating)

Secondary circuit (4-pipe system Heating)

03 = Kvs value = 0.25 (R, N, S)

04 = Kvs value = 0.40 (R, N, S)

06 = Kvs value = 0.63 (R, N, S)

10 = Kvs value = 1.0 (R, N, S)

16 = Kvs value = 1.6 (R, N, S, T, Q)

25 = Kvs value = 2.5 (R, N, S, T, Q)

35 = Kvs value = 3.5 (R, N, S)

Pressure independent 2-way valve

P1 = DN10LF (R, S, T, Q)

P2 = DN10 (R, S, T, Q)

P3 = DN15 (R, S, T, Q)

Primary circuit (2-pipe system Cooling / Heating,

4-pipe system Cooling)

03 = Kvs value = 0.25 (R, N, S)

04 = Kvs value = 0.40 (R, N, S)

06 = Kvs value = 0.63 (R, N, S)

10 = Kvs value = 1.0 (R, N, S)

16 = Kvs value = 1.6 (R, N, S, T, Q)

25 = Kvs value = 2.5 (R, N, S, T, Q)

35 = Kvs value = 3.5 (R, N, S)

Pressure independent 2-way valve

P1 = DN10LF (R, S, T, Q)

P2 = DN10 (R, S, T, Q)

P3 = DN15 (R, S, T, Q)

P4 = DN20 (R, S, T, Q)

P5 = DN25 (R, S, T, Q)

Valve ends

0 = Input / output - valve threaded fitting (male thread)

1 = Input / output - soldered fitting

2 = Input / output - shut-off valve (male thread)

3 = Input / output + shut-off valve + soldered fitting

4 = Input - shut-off valve + threaded fitting (male thread) /

output - throttle valve + threaded fitting (male thread)

5 = Input - shut-off valve + soldered fitting / output - thrott-

le valve + soldered fitting

6 = Input / output - valve threaded fitting (male thread)

- without pipe fittings

Unit type

1 = Single

2 = Double

3 = Big Single

Cassette-Geko

4FläktGroup DC-2011-0150-GB 2022-07/R10 • Subject to modifications

1 Safety and user instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1.1 Availability of the operation manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1.1 Scope of the operation manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1.3 Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1.4 Safety instructions: Warnings and danger symbols . . . . . . . . . . . . . . . . . . . . . . . . . 8

1.4.1 DANGER – Death / serious irreversible injury . . . . . . . . . . . . . . . . . . . . . . 8

1.4.2 WARNING – Death / serious injury . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

1.4.3 CAUTION – Minor or moderate injury . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

1.4.4 ATTENTION – Environmental damage and damage to the unit . . . . . . . . . 9

1.5 Safety symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

1.6 Health and safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

1.7 Use for intended purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

1.8 Improper use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

1.9 Safety standards and regulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

1.10 Amendments and changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

1.11 Spare parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

1.12 Staff qualifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

2 Technical data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

2.1 Unit components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

2.2 Material specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

2.3 Operational limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

2.3.1 Ambient conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

2.3.2 Unit and heat exchanger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

2.3.3 2- and 3-way valves with reversible actuators . . . . . . . . . . . . . . . . . . . . . 17

2.3.4 2-way pressure-independent valves with reversible actuators (ABQM) . . 17

2.3.5 2- and 3-way valves with thermoelectric actuators . . . . . . . . . . . . . . . . . . 18

2.3.6 2-way pressure-independent valves with thermoelectric actuators . . . . . . . .

(ABQM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

2.3.7 2- and 3-way valves with continuous actuators . . . . . . . . . . . . . . . . . . . . . 18

2.3.8 2-way pressure-independent valves with continuous actuators . (ABQM) 18

2.4 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

2.5 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

2.5.1 Unit weight and water volume in heat exchangers . . . . . . . . . . . . . . . . . . 20

2.5.2 Air flow rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

2.5.3 Electrical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

2.6 Condensate pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

2.6.1 Condensate drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

2.6.2 Condensate pump capacity and technical data . . . . . . . . . . . . . . . . . . . . 22

2.7 Ecodesign requirements according to Regulation (EU) 2016/2281 . . . . . . . . . . . . 23

3 Transport and storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

3.1 Transport safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

3.2 Packed content . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

3.3 Packaging and weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

3.4 Transportation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

3.5 Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

3.6 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

4 Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

4.1 Installation site . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

4.2 Recommended inspection access opening for maintenance . . . . . . . . . . . . . . . . . 26

4.3 Installation preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

4.3.1 Ceiling opening . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

4.4 Primary air intake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

4.4.1 Primary air intake opening position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

4.4.2 Primary air intake opening installation . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

4.5 Air supply ductwork . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

4.5.1 Primary air intake opening position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Cassette-Geko

FläktGroup DC-2011-0150-GB 2022-07/R10 • Subject to modifications 5

4.6 Mounting the unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

4.6.1 Mounting the unit directly on the ceiling (without mounting angle

brackets) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

4.6.2 Mounting the unit using mounting angle brackets . . . . . . . . . . . . . . . . . . 36

4.7 Mounting the unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

4.7.1 Direct mounting of the unit (without mounting angle brackets) . . . . . . . . 37

4.7.2 Mounting the unit using mounting angle brackets (accessory set . . . . . . . .

ZGC0112) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

4.7.3 Installing the design panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

5 Connecting heating / cooling medium . . . . . . . . . . . . . . . . . . . 42

5.1 General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

5.2 Overview of valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

5.3 Connecting the supply of cooling and heating media in units without

valves or with retrofitted valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

5.3.1 Installing connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

5.3.2 Position of connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

5.3.3 Media connection - 2-pipe system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

5.3.4 Media connection - 4-pipe system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

5.4 Connecting the supply of cooling and heating media in units with retrofitted

valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

5.4.1 Installing media connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

5.4.2 Media connection - 2-pipe system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

5.3.4 Media connection - 4-pipe system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

5.5 Fitting the lateral condensate drain pan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

5.6 Connecting condensate drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

6 Electrical connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

6.1 Wiring diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

6.2 Electrical enclosure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

6.3 Power supply connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

6.4 Connecting E-heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

6.4.1 E-heating protection values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

6.5 Connecting units with an AC-motor, with the control system on-site . . . . . . . . . . . 77

6.6 Connecting units with an EC-motor, with the control system on-site . . . . . . . . . . . 79

6.6.1 EC-motor control in units with E-heating . . . . . . . . . . . . . . . . . . . . . . . . . 80

6.7 Electrical connections for units with an AC-motor and CET.ACEC

controller / without relay board / with relay board RM1.PCB . . . . . . . . . . . . . . . . . 81

6.7.1 Only Heating mode (2-pipe system) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

6.7.2 Only Cooling mode (2-pipe system) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

6.7.3 Heating or Cooling mode (2-pipe system) . . . . . . . . . . . . . . . . . . . . . . . . 84

6.7.4 Heating and Cooling (4-pipe system/2-pipe system and

E-heating) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

6.8 Electrical connections for units with an EC-motor and CET.ACEC

controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

6.8.1 Only Heating mode (2-pipe system) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

6.8.2 Only Cooling mode (2-pipe system) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

6.8.3 Heating or Cooling mode (2-pipe system) . . . . . . . . . . . . . . . . . . . . . . . . 86

6.8.4 Heating and Cooling mode (4-pipe system) . . . . . . . . . . . . . . . . . . . . . . . 87

6.8.5 CET.ACEC controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

6.9 ISYteq control system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

6.9.1 Features and functions of the ISYteq control system . . . . . . . . . . . . . . . . 91

6.9.2 ISYteq controller technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

6.9.3 Overview of control boards and panels of the ISYteq control

system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

7 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

7.1 Safety test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

7.1.1 Pre-commissioning checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

7.2 Checking control and shut-off valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

Cassette-Geko

6FläktGroup DC-2011-0150-GB 2022-07/R10 • Subject to modifications

7.2.1 Control valves and actuators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

7.2.2 Setting pressure-independent 2-way valves . . . . . . . . . . . . . . . . . . . . . . . 97

7.2.3 Setting throttle valves (optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

7.2.4 Throttle valve for control valves with a kvs value of up to

1.6 (1/2") . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

7.2.5 Throttle valve for control valves with a kvs value of 2.5 (3/4")

up to 4.0 (3/4") . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100

4.6 Venting air from the unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

7.4 Condensate drainage check (not in units with Heating only mode) . . . . . . . . . . . 101

7.5 Condensate pump check (not in units with Heating only mode) . . . . . . . . . . . . . . 102

7.6 Checking E-heating (only in units with E-heating) . . . . . . . . . . . . . . . . . . . . . . . . 102

7.7 Starting the unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

7.8 Commissioning and setting the control system with the CET.ACEC

controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

7.9 Commissioning and setting the ISYteq control system . . . . . . . . . . . . . . . . . . . . . 102

8 Maintenance and troubleshooting . . . . . . . . . . . . . . . . . . . . . . 103

8.1 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104

8.1.1 Overview of regular maintenance intervals . . . . . . . . . . . . . . . . . . . . . . . 104

8.2 Quarterly maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

8.2.1 Filter cleaning / replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

8.3 Annual maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

8.3.1 Condensate drain check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

8.3.2 Checking threaded fittings on media supply lines . . . . . . . . . . . . . . . . . . 106

8.3.3 Checking electrical wiring and earthing . . . . . . . . . . . . . . . . . . . . . . . . . . 106

8.3.4 Cleaning the lateral condensate drain pan . . . . . . . . . . . . . . . . . . . . . . . 106

8.3.5 Checking valves / venting the heat exchanger . . . . . . . . . . . . . . . . . . . . 106

8.4 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

8.4.1 Resetting the manual thermal fuse for E-heating . . . . . . . . . . . . . . . . . . 107

8.5 Operational faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

9 Dismantling and disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110

9.1 Dismantling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110

9.2 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110

Distributing and copying of this document, its sale and the disclosure of its content is strictly prohibited without express

prior consent. Any violation of this clause will result in liability for damages. All rights in relation to patent, utility model

or industrial design registration are reserved.

Cassette-Geko Safety and user instructions

FläktGroup DC-2011-0150-GB 2022-07/R10 • Subject to modifications 7

1 Safety and user instructions

This is the original operation manual verified by the manufacturer.

HyCassette-Geko® fan coil units are developed and manufactured in accordance with

the state-of-the-art technological standards, established technical safety codes and

EC Machinery Directive.

Cassette-Geko® fan coil units are reliable in operation and satisfy strict quality stan-

dards.

Their technical quality level meets the high user requirements for easy maintenance

and servicing.

Nevertheless, each unit may pose a risk to the user or third parties, may break down

or cause other damage. Safety regulations must therefore be observed at all times.

The operation and maintenance of the unit must therefore be conducted in keeping

with regulations and user standards; failure to follow them could result in death, serious

injury, environmental damage and/or other damage

Observing the safety instructions in this operation manual will help avoid risk and

ensure the economical operation of the unit and full benefits of its use.

The safety aspects covered by this Chapter apply to the entire operation manual for

Cassette-Geko units.

1.1 Availability of the operation manual

This operation manual contains instructions regarding the safe and proper operation

of Cassette-Geko fan coil units.

This operating manual applies to installation companies, building technicians,

technical personnel, operators and electricians.

The manual must at all times be available at the site where the unit is being operated.

All persons working with the unit or in its vicinity must read and observe the

information contained in this manual, paying particular attention to safety instructions.

1.2 Scope of the operation manual

This operation manual contains information on the following areas:

– Transportation

– Assembly / Installation

– Power supply connection

– Commissioning

– Use and operation

– Maintenance and troubleshooting

1.3 Symbols

The text of this operation manual uses the following symbols:

– Symbol for a new paragraph

•Symbol for instructions to follow

Symbol for the result of an action

Note!

This symbol indicates additional information regarding Cassette-Geko fan coil units

and their accessories.

Recycling!

This symbol indicates information on handling packing material and used machine

parts (classified according to the type of material used).

Safety and user instructions Cassette-Geko

8FläktGroup DC-2011-0150-GB 2022-07/R10 • Subject to modifications

1.4 Safety instructions: Warnings and danger symbols

1.4.1 DANGER – Death / serious irreversible injury

This indicates an extremely hazardous situation which would result in death or serious

irreversible injury unless the safety instructions are followed.

Example:

1.4.2 WARNING – Death / serious injury

This indicates a very hazardous situation which can result in death or serious

irreversible injury unless the safety instructions are followed.

Example:

1.4.3 CAUTION – Minor or moderate injury

This indicates a hazardous situation which can result in minor or moderate injury

unless the safety instructions are followed.

Example:

Electric shocks from hazardous high voltage will lead to death or serious in-

jury!

•Disconnect the unit from the power supply and ensure that the power cannot be

switched back on.

•Ensure that the unit is isolated from the power supply, earth it and short-circuit the

parts that conduct power. Cover the unit or protect it from voltage from other

appliances.

Risk of injury from rotating parts!

•A risk of injury from rotating fan impellers.

•Before commencing any kind of work on the unit, disconnect it from the power

supply.

•Ensure that it is secured against being switched back on.

Sharp edges can cause injuries!

During cleaning operations exercise caution due to the risk of injury from thin and

sharp edges.

•Use protective gloves.

Cassette-Geko Safety and user instructions

FläktGroup DC-2011-0150-GB 2022-07/R10 • Subject to modifications 9

1.4.4 ATTENTION – Environmental damage and damage to the unit

This indicates activities which may result in damage to the unit or property.

Example:

1.5 Safety symbols

The following symbols are used throughout the manual as warnings:

ATTENTION

Damage to the environment!

Heavily contaminated filters can have a negative impact on production processes.

Depending on the materials used contaminated filters are therefore classified as

hazardous waste and must be properly disposed of according to

the guidelines and regulations in force.

ATTENTION

Damage to the unit!

If air intake and discharge outlets are covered during operation, the unit can be

damaged beyond repair as a result of negative pressure or overpressure.

Risk of electrocution!

This symbol indicates activities posing a risk of electrocution.

Injury to persons!

This symbol indicates a possible risk of injury.

Risk of injury from suspended loads!

This symbol indicates a risk of injury and damage due to suspended loads.

Sharp edges can cause injuries!

This symbol indicates instructions, commands and restrictions which, if not obser-

ved, may result in cuts or damage caused by sharp edges.

Risk of injury from rotating parts!

This symbol indicates instructions, commands and restrictions which, if not obser-

ved, may result in injury or damage caused by rotating parts.

Damage to the environment!

This symbol warns of damage to the environment and refers to the applicable env-

ironmental protection regulations.

Risk of scalding!

This symbol indicates a possible risk of injury due to hot liquids.

Damage to the unit!

This symbol refers to special data, commands and restrictions to avoid damage to

the unit.

Safety and user instructions Cassette-Geko

10 FläktGroup DC-2011-0150-GB 2022-07/R10 • Subject to modifications

1.6 Safety at work

When installing or repairing fan coil units on-site, observe the following instructions:

•During work wear suitable protective clothing, protective footwear, gloves and safety

goggles etc.

•Avoid sources of open flames, especially lit cigarettes. Sources of open flames and

smoking in the proximity of the unit are prohibited. Filters, especially used ones, are

easily flammable.

When working with the power supply:

For all types of work:

Electric shocks from hazardous high voltage will lead to death or serious in-

jury!

•Disconnect the unit from the power supply and ensure that the power cannot be

switched back on.

•Ensure that the unit is de-energised and isolated, grounded and short-circuited.

Cover the unit or protect it from voltage from other appliances.

Risk of scalding!

Before performing work on the valves or media inlet or outlet connections, close

the heating medium inlet to prevent scalding. Do not commence work until the

heating medium in the unit has cooled down.

•During work use suitable protective equipment.

Sharp edges can cause injuries!

During cleaning operations exercise caution due to the risk of injury from thin and

sharp edges.

•Use protective gloves.

Risk of injury from rotating parts!

Risk of injury from rotating fan impellers. Before commencing any kind of work on

the unit, disconnect it from the power supply. Ensure that it is secured against

being switched back on.

Injury to persons!

When transporting and mounting the unit always wear protective gloves to prevent

injury from sharp edges.

Observe all work safety standards and regulations .

Cassette-Geko Safety and user instructions

FläktGroup DC-2011-0150-GB 2022-07/R10 • Subject to modifications 11

1.7 Use for intended purpose

Cassette-Geko fan coil units are used in a standard environment according to CSN EN

60 721-3-3 and are intended exclusively for heating, filtration and cooling. Water or a

water/glycol solution may be used as a medium (max. solution concentration 50%).

The unit must be used pursuant to Commission Regulation (EU) No. 1253/2014.

The following limiting values apply for use with Cu/Al heat exchangers:

Cassette-Geko fan coil units may only be used indoors.

Cassette-Geko fan coil units are suitable for ceiling mounting.

ATTENTION

Damage to the environment!

Do not pollute the environment with coolants and oils. Dispose of them in

accordance with local regulations and in an ecologically friendly manner. Mixtures

of ethylene and propylene glycol are regarded as substances hazardous to water,

categorized in water hazard class 1 (slightly hazardous to water). The same

applies to water mixtures.

Damage to the unit!

The mounting position of the unit should prevent dripping or splashing water from

entering the unit’s interior wiring and damaging the unit.

Parameter Unit with Value

pH value (at 20°C) 7.5 - 9

Conductivity (at 20°C) S/cm < 700

Oxygen content O2mg/l < 0.1

Total hardness °dH 1 - 15

Dissolved sulphur S Not detectable

Sodium Na+mg/l < 100

Iron Fe2+, Fe3+ mg/l < 0.1

Manganese Mn2+ mg/l < 0.05

Ammonia content NH4+mg/l < 0.1

Chloride Cl-mg/l < 100

Sulphate SO42- mg/l < 50

Nitrite NO2-mg/l < 50

Nitrate NO3-mg/l < 50

Tab. 1-1: Threshold values for media in closed cooling and heating circuits

Damage to the unit!

In open systems (e.g. when using well water, observe the threshold values from

tab. 1-1) it is also necessary to remove deposits from the water using a supply line

filter. Otherwise, there is a risk of corrosion, resulting in possible damage to or

destruction of the heat exchanger.

The unit must also be protected from dust and other substances which, in contact

with water, will start an acidic or alkaline reaction (aluminium corrosion).

Especially in Cassette-Geko units with a cooling function the intake of waste air from

the kitchen containing organic acids such as vinegar must be prevented. Also, the

room in which the unit is installed must not be cleaned using cleaners containing

vinegar or other organic acids.

Acids may cause the corrosion of aluminium louvres!

Safety and user instructions Cassette-Geko

12 FläktGroup DC-2011-0150-GB 2022-07/R10 • Subject to modifications

1.8 Improper use

Cassette-Geko units must not be operated:

– without the air intake vent grille

– outdoors

– with an open media system (well water) without a supply line filter

– with an outside air (outdoor air) supply

– in explosive environments

– in humid areas,

– In excessively dust-laden areas containing, for example in areas where drywalling

is being carried out or there is construction dust, or in zones with a corrosive env-

ironment.

1.9 Safety standards and regulations

When carrying out the installation, electrical connection, maintenance and service of

Cassette-Geko® units, be sure to observe all local safety regulations and standards

and generally established technical practices.

• CSN EN 60335-1 ed. 3 Safety of household and similar electrical appliances Part 1:

General requirements.

• CSN 331310 ed. 2 Safety regulations for electrical equipment Safety regulati-

ons for electrical equipment intended to be used by persons

without any electrical engineering qualifications.

• CSN 332000-1 ed. 2 Low-voltage electrical installations – Fundamental princip-

les, assessment of general characteristics

• CSN 06 1008 Fire protection of heating appliances.

• CSN EN 13501-1 Fire classification of construction products and building ele-

ments - Part 1: Classification using test data from reaction

to fire tests.

Note!

Cassette-Geko fan coil units designed only for heating cannot be modified to have

a cooling function at a later date.

Note!

The manufacturer is not liable for any subsequent damage caused improper

installation or use. The liability is always with the supplier, installer or user.

Proper use includes compliance with this manual with respect both to the mounting

and installation of the unit and the inspection and maintenance conditions described

herein.

Damage to health and property!

When installing the unit it is necessary to observe safe distances from flammable

materials according to CSN EN13501-1, (i.e. for Class A2 at least 150 mm, other

classes B, C, D, E, F (flammable and slightly flammable materials) at least 300 mm).

A minimum distance of 1,000 mm from objects of all classes must be maintained in

the direction of air discharge (except for inflammable Class A1 objects).

Damage to health and property!

The improper use of Cassette-Geko fan coil units may lead to damage to health and

property.

Cassette-Geko Safety and user instructions

FläktGroup DC-2011-0150-GB 2022-07/R10 • Subject to modifications 13

1.10 Changes and modifications

No modifications or changes to Cassette-Geko units are permitted.

Any changes or modifications to the unit will invalidate the declaration of conformity

and, consequently, all warranty claims.

1.11 Spare parts

Only original FläktGroup spare parts may be used. FläktGroup is not liable for damage

caused by using third-party spare parts.

1.12 Operator qualifications

Note!

Every person assigned to work with Cassette-Geko units must read and properly

understand the operation manual.

Installation / commissioning / maintenance / repairs:

Only by trained and instructed HVAC professionals.

Electrical installation:

Only by trained electrical engineering professionals qualified pursuant to Clause 6

of Directive CUBP and CBU No. 50/78Coll.

All professionals must be able to assess the work assigned to them

and identify and prevent any risks.

Technical data Cassette-Geko

14 FläktGroup DC-2011-0150-GB 2022-07/R10 • Subject to modifications

2 Technical data

2.1 Unit components

Pos. 1: Air intake grille

Pos. 2: Filter

Pos. 3: Design panel with louvres

Pos. 4: Main condensate drain pan

Pos. 5: Radial fan

Pos. 6: Heat exchanger (optionally incl. electric

heating)

Pos. 7: Unit casing

Pos. 8: Electrical enclosure

Pos. 9: Lateral condensate drain pan

Pos. 10: Mounting angle brackets

Pos. 11: Primary air connectionopening

Pos. 12: External outlet air duct opening

Pos. 13: Condensate pump

Fig. 2-1: Cassette-Geko (Single) unit components

Cassette-Geko Technical data

FläktGroup DC-2011-0150-GB 2022-07/R10 • Subject to modifications 15

Some of the unit parts indicated in fig. 2-1are described in detail below.

Air intake grille (Pos. 1)

The removable air intake grille serves as protection against contact with the fan.

Filter (Pos. 2)

The filter treats intake air. It is regenerative.

Design panel with louvres (Pos. 3)

The front design panel acts as a visual end piece between the unit and the suspended

ceiling. The directional louvres control the direction of the flow of air being discharged.

Main condensate drain pan (Pos. 4)

The main condensate drain pan collects condensate generated inside the Cassette-

Geko unit during cooling and at the same time acts as an integrated fan air intake

nozzle.

Radial fan (Pos. 5)

The radial fan consists of a single radial impeller and features quiet, maintenance-free

ball bearings. The fan motors are available with speed stages (AC) or with variable

speed control (EC), with motor protection provided through integrated (optionally

wired) thermal contacts or, in EC motors, with an interlocking device.

IP44 rating and Class B insulation.

Heat exchanger (optionally incl. electric heating) (Pos. 6)

The heat exchanger for chilled and warm water has a connection fitting with an R½" or

R3/4" female thread, air vent valves and drain valves. Depending on the type of appli-

cation the heat exchanger is equipped with two connection fittings (inlet and outlet in a

2-pipe system) or four connection fittings (2 inlets and 2 outlets in a 4-pipe system).

Unit casing (Pos. 7)

The unit casing is made of galvanized sheet steel and features an external layer of

insulation (fleece).

Electrical enclosure (Pos. 8)

Depending on the version the galvanized sheet steel electrical enclosure contains:

– one or more circuit boards

– contactors / relays

– two manual and automatic thermal fuses (E-heating)

– one or two terminal blocks.

Lateral condensate drain pan (Pos. 9)

The lateral condensate drain pan is used to collect condensate from valves and fittings

and includes a drain for the condensate to flow into the main condensate drain pan.

Mounting angle brackets (Pos. 10)

The mounting angle brackets are fitted on the side of the unit casing. The fork-like

shape facilitates quick mounting on a suitable ceiling suspension bracket.

Primary air connection opening (Pos. 11)

At this point it is possible to connect a standard rectangular primary air supply duct to

the casing.

External outlet air duct opening (Pos. 12)

At this point it is possible to connect an external air outlet to the unit casing to a more

remote point using a circular air duct.

Condensate pump (Pos. 13)

The condensate pump transports the condensate collected in the main condensate

drain pan to collection and drainage points located higher up.

Technical data Cassette-Geko

16 FläktGroup DC-2011-0150-GB 2022-07/R10 • Subject to modifications

2.2 Material specifications

2.3 Operational limits

2.3.1 Ambient conditions

The air temperature within the intake area of a Cassette-Geko® unit (an the centre of

the design panel) must be kept between 6° and 40 °C; higher or lower temperatures

are not permitted. The unit can only be used in areas with relative humidity of between

15% and 65%.

The table shows the operational limits for the various operational modes.

TR is room temperature; TR is the difference between room temperature and the tem-

perature of air discharged by the unit, r.h. is relative air humidity in relation to room tem-

perature.

In the limit value range, the opening of the directional air louvres should be approx. 25

mm and not be used for a period of time longer than (> 3 h) as fluctuations in tempe-

rature or humidity will cause a condensation build-up on the casing or the louvres.

Unit part Material

Air intake grille Plastic

Filter Synthetic fabric

Design panel with louvres Plastic

Main condensate drain pan Polystyrene foam with an integrated inlet nozzle made of plastic

Fan Various materials

Heat exchanger (optionally incl. electric hea-

ting)

Copper / aluminium

Unit casing Galvanized sheet steel with polyethylene insulation

Electrical enclosure Various materials

Lateral condensate drain pan Plastic with insulation at the bottom of cellulose polyethylene

Mounting angle brackets Galvanized sheet steel

Condensate pump Various materials

E-heating A stainless steel heater inside the heat exchanger

Tab. 2-1: Material specifications

Note!

No more than 50% of the directional air louvres may be shut during cooling opera-

tion.

Temperature difference

TR [°C]

Room temperature TR (°C) Relative humidity [%]

23 35 45

21 30 50

18 30 55

13 30 58

12 25 65

Tab. 2-2: Operational limits for the various operational modes

Cassette-Geko Technical data

FläktGroup DC-2011-0150-GB 2022-07/R10 • Subject to modifications 17

2.3.2 Unit and heat exchanger

2.3.3 2- and 3-way valves with reversible actuators

2.3.4 2-way pressure-independent valves with reversible actuators (ABQM)

Unit and heat exchanger Values

Max. operating pressure / temperature 1.6 MPa (16 bar) / 85 °C

Min. cooling medium temperature 6 °C

Ambient conditions see Chapter 2.3.1

Operating voltage 230 V~/50/60 Hz

Power input / consumption See the type label

Tab. 2-3: Operational limits for the unit and heat exchanger

Unit type Capacity

stage

Maximum water volume [l/h]

2-pipe system 4-pipe system

Heating or Cooling Heating Cooling

Single 1 978 489 734

Double 1 1956 978 1467

Big Single 1 1712 978 1712

Tab. 2-4: Maximum water volume

Valves with reversible actuators Values

230 V AC / 24 V AC 230 V AC 24 V AC

Max. operating pressure / temperature 1.6 MPa (16 bar) / 110 °C

Valve travel 2.8 mm

Max. permitted ambient temperature 55 °C

Operating voltage 230 VAC

50/60 Hz

24 V AC

50/60 Hz

Power input / protection rating 8 VA/IP 43 1 VA/IP 43

Run time 130 seconds

Water max. 50% glycol content

Tab. 2-5: Operational limits for valves with reversible actuators

Pressure-independent valves with reversible

actuators

Values

Max. operating pressure / temperature 1.6 MPa (16 bar) / 110 °C

Valve travel 2.25 mm

Max. permitted ambient temperature 55 °C

Operating voltage 230 V AC, 50/60 Hz

Power input / protection rating 8 VA / IP 43

Run time Approx. 130 seconds

Water max. 50% glycol content

Tab. 2-6: Operational limits for pressure-independent valves with reversible actuators

Technical data Cassette-Geko

18 FläktGroup DC-2011-0150-GB 2022-07/R10 • Subject to modifications

2.3.5 2- and 3-way valves with thermoelectric actuators

2.3.6 2-way pressure-independent valves with thermoelectric actuators (ABQM)

2.3.7 2- and 3-way valves with continuous actuators

2.3.8 2-way pressure-independent valves with continuous actuators (ABQM)

Valves with thermoelectric actuators Values

230 V AC / 24 V AC 230 VAC 24 V AC

Max. operating pressure / temperature 1.6 MPa (16 bar) / 110 °C

Valve travel 2.8 mm

Max. permitted ambient temperature 60 °C

Operating voltage 230 VAC

50/60 Hz

24 V AC

50/60 Hz

Power input / protection rating 2 VA / IP 43

Run time Approx. 130 seconds Approx. 130 seconds

Water max. 50% glycol content

Tab. 2-7: Operational limits for valves with thermoelectric actuators

Valves with thermoelectric actuators Values

230 V AC / 24 V AC 230 VAC 24 V AC

Max. operating pressure / temperature 1.6 MPa (16 bar) / 110 °C

Valve travel 2.25 mm

Max. permitted ambient temperature 60 °C

Operating voltage 230 VAC

50/60 Hz

24 V AC

50/60 Hz

Power input / protection rating 2 VA / IP 431

Run time Approx. 130 se-

conds

Approx. 130 se-

conds

Water max. 50% glycol content

Tab. 2-8: Operational limits for valves with thermoelectric actuators

Valves with continuous actuators Values

Max. operating pressure / temperature 1.6 MPa (16 bar) / 110 °C

Valve travel 2.8 mm

Max. permitted ambient temperature 55 °C

Operating voltage 24 V AC, 50/60 Hz

Analogue control signal 0 ... 10 (2 ... 10) V

Power input / protection rating 1.3 VA / IP 42

Run time 130 seconds

Water max. 50% glycol content

Tab. 2-9: Operational limits for valves with continuous actuators

Pressure-independent valves with

continuous actuators

Values

Max. operating pressure / temperature 1.6 MPa (16 bar) / 110 °C

Valve travel 2.25 mm

Max. permitted ambient temperature 55 °C

Operating voltage 24 V AC, 50/60 Hz

Analogue control signal 0 ... 10 (2 ... 10) V

Power input / protection rating 1.3 VA / IP 42

Run time 130 seconds

Water max. 50% glycol content

Tab. 2-10: Operational limits for valves with continuous actuators

Cassette-Geko Technical data

FläktGroup DC-2011-0150-GB 2022-07/R10 • Subject to modifications 19

2.4 Dimensions

Type Single

Type Double

Fig. 2-2: Dimensions of Cassette-Geko fan coil units, type Single

1) = Minimum distance from the lower edge of the suspended ceiling to the ceiling necessary for mounting and dismant-

ling the unit

2) = The size of the electrical enclosure depends of the type of unit

3) = Distance from the ceiling depending on the type of mounting (see Chapter 4.3 "Installation preparation" on page 27)

Fig. 2-3: Dimensions of Cassette-Geko fan coil units, type Double

1) = Minimum distance from the lower edge of the suspended ceiling to the ceiling necessary for mounting and dismant-

ling the unit

2) = The size of the electrical enclosure depends of the type of unit

3) = Distance from the ceiling depending on the type of mounting (see Chapter 4.3 "Installation preparation" on page 27)

Technical data Cassette-Geko

20 FläktGroup DC-2011-0150-GB 2022-07/R10 • Subject to modifications

Type Big Single

2.5 Technical data

2.5.1 Unit weight and water volume in heat exchangers

2.5.2 Air flow rate

Fig. 2-4: Dimensions of Cassette-Geko fan coil units, type Big Single

1) = Minimum distance from the lower edge of the suspended ceiling to the ceiling necessary for mounting and dismant-

ling the unit

2) = Distance from the ceiling depending on the type of mounting (see Chapter 4.3 "Installation preparation" on page 27)

Type Capacity stage Weight [kg] Heat exchanger water volume [l]

2-pipe system 4-pipe system 2-pipe system 4-pipe system

Heating Cooling

Single 1 27 28 2.1 0.8 1.5

Double 1 53 54 4.2 1.6 3.0

Big Single 1 44 46 4.6 1) 4.3 2) 1.6 3.1

1) without E-heating ,2) with E-heating

Tab. 2-11: Unit weight and water volume in heat exchangers

Type Air-flow function Capacity

stage

Air flow rate [m3/h]

of the electric

motor

Fan speed levels 1)

1 2 3 4 5

Single AC 1 330 480 660 - -

EC 1 250 330 480 660 850

Double AC 1 530 740 1000 - -

EC 1 530 740 1000 1220 1400

Big Single AC 1 620 920 1200 - -

EC 1 620 770 920 1150 1530

1) EC-motors can be operated with speed stages only when a controller is used; otherwise, they run with stepless speed control

Tab. 2-12: Volume flow rate

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FläktGroup Cassette-Geko Operating instructions

Brand: FläktGroup

Model: Cassette-Geko

Category: Split-system air conditioners

Type: Operating instructions

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FläktGroup Cassette-Geko Operating instructions

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