FläktGroup HyFlex-Geko Operating instructions

HyFlex-Geko ®

OPERATION MANUAL

Contents HyFlex-Geko

2FläktGroup DC-2019-0100-GB 2022-05/R5 • Subject to modification

1 Safety and user instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

1.1 Availability of the Operation Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

1.2 Scope of the Operation Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

1.3 Symbols used . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

1.4 Safety instructions: warning and danger symbols . . . . . . . . . . . . . . . . . . . 11

1.4.1 DANGER – Death/serious irreversible injury . . . . . . . . . . . . . . . . 11

1.4.2 WARNING – Death/serious injury . . . . . . . . . . . . . . . . . . . . . . . . . 11

1.4.3 CAUTION – Minor or moderate injury possible . . . . . . . . . . . . . . 11

1.4.4 ATTENTION – Environmental or material damage . . . . . . . . . . . 12

1.5 Identification of safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

1.6 Safety-conscious work procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

1.7 Proper use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

1.7.1 Units with electric heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

1.8 Improper use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

1.9 Safety regulations and codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

1.10 Modifications and changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

1.11 Spare parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

1.12 Selection and qualification of personnel . . . . . . . . . . . . . . . . . . . . . . . . . . 16

2 Technical description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

2.1 Unit components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

2.2 Material specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

2.3 Operating limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

2.3.1 Medium inlet temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

2.3.2 External air side resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

2.3.3 Unit and heat exchanger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

2.3.4 2- and 3-way valves with modulating actuators R, N . . . . . . . . . . 21

2.3.5 2-way pressure-independent valves with modulating actuators R 21

2.3.6 2 and 3-way valves with thermoelectric actuators T, Q . . . . . . . . 21

2.3.7 2-way pressure-independent valves with thermoelectric actuators

T, Q . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

2.3.8 2- and 3-way valves with continuous actuators S . . . . . . . . . . . . . 22

2.3.9 2-way pressure-independent valves with continuous actuators S 22

2.3.10 6-way valves with continuous actuators Z . . . . . . . . . . . . . . . . . . 22

2.4 Unit data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

2.4.1 Unit weight and water charge of heat exchangers . . . . . . . . . . . . 23

2.4.2 Electrical data for units with auxiliary electric heating

(max. values) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

2.4.3 Air flow rate and electrical data . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

2.4.4 Electrical data of valve actuators . . . . . . . . . . . . . . . . . . . . . . . . . 26

2.5 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

2.5.1 Basic unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

2.5.2 Unit casing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

2.6 Condensate pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

2.6.1 Function of condensate drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

2.6.2 Technical data and capacity of condensate pump P for wall and

ceiling units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

2.6.3 Technical data and capacity of condensate pump F (for ceiling

units only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

2.7 Air side and other accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

2.8 Regulation 2016/2281 of the EU Commission of 30 November 2016 . . . 34

HyFlex-Geko Contents

FläktGroup DC-2019-0100-GB 2022-05/R5 • Subject to modification 3

3 Shipping and storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

3.1 Transport safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

3.2 Packaged content . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

3.3 Packaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

3.4 Transport . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

3.4.1 Shipping without unit casing . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

3.4.2 Shipping with unit casing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

3.5 Temporary storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

4 Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

4.1 Installation site . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40

4.2 Recommended service opening for maintenance work on the basic unit .41

4.3 Removing the unit casing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42

4.3.1 Removing the unit casing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42

4.4 Pre-installation work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43

4.5 Recirculating air unit assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44

4.5.1 Vertical installation – wall-mounting/freestanding on the floor . . . .45

4.5.2 Horizontal installation – ceiling / suspended ceiling / floor unit . . .46

4.5.3 Horizontal installation – suspended ceiling unit

(hotel configuration) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47

4.6 Mixed air unit assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48

4.6.1 Vertical installation – wall-mounting/freestanding on the floor . . . .49

4.6.2 Horizontal installation – ceiling / suspended ceiling / floor unit . . .50

4.6.3 Installation of mixed air units on the wall with outside air intake

from the rear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51

4.6.4 Installation of mixed air units on the ceiling with outside air intake

from above (vertical) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52

4.6.5 Installation of mixed air units on the ceiling with outside air intake

from rear (horizontal) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53

4.6.6 Adjusting the mixed air rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53

4.7 Installation of ducts provided by the customer . . . . . . . . . . . . . . . . . . . . . .54

4.7.1 Installation of ducts provided by the customer on the discharge

side . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54

4.7.2 Installation of ducts provided by the customer on the intake side

(recirculating air units) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55

4.7.3 Installation of ducts provided by the customer on the intake side

(mixed air units) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55

4.8 Installation of the unit casing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56

4.9 Installation of accessories on the air intake side . . . . . . . . . . . . . . . . . . . .58

4.9.1 Installation of filter chamber F7/F9 on the air intake side

(ZGS.#AF71 or ZGS.#AF91) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58

4.10 Installation of accessories on the air discharge side . . . . . . . . . . . . . . . . .59

4.10.1 Installation of filter chamber F7/F9 on the air discharge side

(ZGS.#AF72 or ZGS.#AF92) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59

4.11 Installation of other accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60

4.11.1 Installation of the analogue pressure gauge (ZGS.0APG3) . . . . .60

Contents HyFlex-Geko

4FläktGroup DC-2019-0100-GB 2022-05/R5 • Subject to modification

5 Hydraulic connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

5.1 General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

5.2 Overview of valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

5.3 Heating and cooling connections for units without valves or with valves

provided by the customer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

5.3.1 Installation of the connections . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

5.3.2 Media connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

5.3.3 Medium connection, 2-pipe or 4-pipe system . . . . . . . . . . . . . . . . 66

5.4 Heating and cooling water connections for units with factory-mounted

valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

5.4.1 Installation of connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

5.4.2 Medium connection in a 2-pipe system . . . . . . . . . . . . . . . . . . . . 68

5.4.3 Medium connection in a 4-pipe system . . . . . . . . . . . . . . . . . . . . 69

5.5 Connecting the condensate drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

5.5.1 Connecting the condensate drain (vertical installation – wall

units) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

5.5.2 Connecting the condensate drain (horizontal installation –

ceiling units) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

5.6 Connecting the condensate pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

5.6.1 Connecting condensate pump P (vertical installation – wall units) 73

5.6.2 Connecting condensate pump P (horizontal installation – ceiling

units) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

5.6.3 Condensate pump connection F (for horizontal installation only) . 75

6 Electrical connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

6.1 Connection diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

6.2 Terminal box or electric switch cabinet . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

6.3 Fan speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

6.3.1 5-speed AC motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

6.3.2 Fan with EC motor (type E) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

6.3.3 Fan with EC motor (type Y) and with external PCBs . . . . . . . . . . 79

6.4 Condensate pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

6.5 Connection for external control or when using a controller/switch . . . . . . 81

6.5.1 Connection of several HyFlex-Gekos with AC fan(s) . . . . . . . . . . 82

6.5.2 Connection of HyFlex-Gekos with EC motor (type E) . . . . . . . . . . 84

6.5.3 Connection of HyFlex-Gekos with EC motors (type Y) . . . . . . . . . 87

6.5.4 Minimum air flow rates for units with auxiliary electric heater . . . . 90

6.6 Electrical connection with on-site regulation by customer . . . . . . . . . . . . 91

6.6.1 Connecting mains supply voltage for controller . . . . . . . . . . . . . . 91

6.6.2 Connection of the mains voltage for auxiliary electric heating . . . 91

6.7 Electrical connection with CET.ACEC . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

6.7.1 Unit connection terminals for versions with AC motor without FG

relay PCB / with FG relay PCB RM1.PCB . . . . . . . . . . . . . . . . . . 92

6.7.2 Electrical connection for EC fan with compact switch CET.ACEC 98

6.7.3 Control panel CET.ACEC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

6.8 CMT controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

6.8.1 CMT.AC controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

6.8.2 CMT.EC controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

6.9 ISYteq controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

6.9.1 Properties and functions of ISYteq controllers . . . . . . . . . . . . . . 108

6.9.2 Technical data of the ISYteq controls . . . . . . . . . . . . . . . . . . . . . 108

6.9.3 Overview of the controller PCBs and operator panels of the

ISYteq controllers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

HyFlex-Geko Contents

FläktGroup DC-2019-0100-GB 2022-05/R5 • Subject to modification 5

7 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

7.1 Safety check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .114

7.1.1 Pre-commissioning requirements . . . . . . . . . . . . . . . . . . . . . . . .114

7.1.2 Checks prior to commissioning . . . . . . . . . . . . . . . . . . . . . . . . . .115

7.2 Checking the control and shut-off valves . . . . . . . . . . . . . . . . . . . . . . . . .116

7.2.1 Control valves and actuators . . . . . . . . . . . . . . . . . . . . . . . . . . . .116

7.2.2 Adjustment of the pressure-independent valves . . . . . . . . . . . . .117

7.2.3 Shut-off valve settings (variants) . . . . . . . . . . . . . . . . . . . . . . . . .118

7.2.4 Shut-off valve for control valves up to kvs value 1.6 (1/2”) . . . . .119

7.2.5 Shut-off valve for control valves from kvs value 2.5 (3/4”) to

kvs value 4.0 (3/4”) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .120

7.3 Vent the unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .121

7.4 Check the condensate drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .122

7.5 Check electric heating (only for units with auxiliary electric heating) . . . .122

7.6 Checking frost protection (only with mixed air units) . . . . . . . . . . . . . . . .123

7.7 Checking condensate pump (applies only to cooling units with

condensate pump) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .123

7.7.1 Check condensate pump for cooling units . . . . . . . . . . . . . . . . . .124

7.8 Commissioning and adjustment of the compact controller CET.ACEC . .125

7.9 Commissioning and adjustment of the ISYteq controller . . . . . . . . . . . . .125

8 Maintenance and troubleshooting . . . . . . . . . . . . . . . . . . . . . . 126

8.1 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .126

8.1.1 Disinfection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .127

8.2 Quarterly maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .128

8.2.1 Cleaning or replacing filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . .128

8.2.2 Replacement of the plate filter in filter chamber F7 / F9

(ZGS.#AF7#.00 or ZGS.#AF9#.00) . . . . . . . . . . . . . . . . . . . . . . .130

8.3 Semi-annual maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .131

8.3.1 Air intake plenum/discharge plenum cleaning/disinfecting . . . . .131

8.3.2 Cleaning/disinfecting the fan chamber . . . . . . . . . . . . . . . . . . . .132

8.3.3 Check the fan. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .132

8.4 Annual maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .133

8.4.1 Check screw connections of medium lines . . . . . . . . . . . . . . . . .133

8.4.2 Check heat exchanger and main condensate pan for

dirt/contamination, and clean/disinfect if necessary . . . . . . . . . .133

8.4.3 Check internal insulation for dirt/contamination, and

clean/disinfect if necessary . . . . . . . . . . . . . . . . . . . . . . . . . . . . .134

8.4.4 Check electrical connections and earthing . . . . . . . . . . . . . . . . .135

8.4.5 Fixation of actuators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .135

8.4.6 Cleaning/disinfecting the condensate pan . . . . . . . . . . . . . . . . . .135

8.4.7 Check valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .135

8.5 Before cooling season . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .136

8.5.1 Clean condensate pan filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . .136

8.5.2 Clean level sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .136

8.5.3 Check function of condensate pump P, F . . . . . . . . . . . . . . . . . .137

8.6 Before heating season . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .138

8.6.1 Checking antifreeze agent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .138

8.7 Malfunctions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .139

Contents HyFlex-Geko

6FläktGroup DC-2019-0100-GB 2022-05/R5 • Subject to modification

9 Disassembly and disposal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142

9.1 Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142

9.2 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142

EC Declaration of Conformity . . . . . . . . . . . . . . . . . . . . . . . . . . 143

– Original Operation Manual –

Copyright note

Disclosing, copying, distributing or taking any action in reliance on the contents of this document is strictly prohibited

of the grant of a patent, utility model or design.

HyFlex-Geko Type code

FläktGroup DC-2019-0100-GB 2022-05/R5 • Subject to modification 7

FFan

Heat exchanger

Cooling

Heating

Position

Direction of air

flow

Medium connection

Motor type

Speeds

Capacity

Controller

Air intake

Air discharge

Filter class

Filter design

PRODUCT

G S 1 M M . U 0 W H I 3 . 1 0 A 0 0 0 0 . S S 0 0 1 F . 0

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29

PRODUCT: REVISION:

G = Fan coil unit

TYPE: FILTER CLASS

S = HyFlex-Geko 0 = without filter

1 = Filter G1 (ISO course 5%)

3 = Filter G3 (ISO course 60%)

UNIT SIZE:

5 = Filter M5 (ISO ePM10 50%)

1,2,3,4,5,6,8

FILTER MODEL AND REPLACEMENT:

FAN CAPACITY SIZE

F = Flat filter with rigid frame /

M = medium Front filter change

H = high L = Flat filter with collapsible frame /

Lateral filter change

CAPACITY SIZE – HEAT EXCHANGER:

M = medium

H = high MOUNTED ACCESSORIES, AIR INTAKE:

0 = without

C =

Box with pre-punched openings for 200 mm

AIR FUNCTION:

Round connector

U = Recirculating air P = Discharge panel with 200 mm round connector

M = Outdoor air (mixed air) S = Box with 200 mm round connector

1 = U : inlet spigot water side - NO fresh air

2 = U : inlet spigot opposite to water side - NO fresh air

3 = U : inlet spigot water side + fresh air spigot

4 = U : inlet spigot opposite to water side + fresh air spigot

5 = H : inlet spigots 200mm

7 = H : inlet spigots 200mm water side + fresh air spigot

8 = H : inlet spigots 200mm opposite to water side + fresh air spigot

MOUNTED ACCESSORIES, AIR DISCHARGE:

MEDIUM FUNCTION:

0 = without

0W = Heating Water

C =

Box with pre-punched openings for 200 mm

0 F = Heating Water or electric heating Round connector

W0 = Cooling Water P = Intake panel with 200 mm round connector

WC = Cooling or heating Water S = Box with 200 mm round connector

WE = Cooling or heating Water (cooling) or e-heating

WB = Cooling or heating Water (cool/heat) or e-heating 1 = U : supply spigot water side - NO fresh air

WW = Cooling and heating Water 2 = U : supply spigot opposite to water side - NO fresh air

WF = Cooling and heating

Wat

e

3 = U : supply spigot water side + fresh air spigot

4 = U : supply spigot opposite to water side + fresh air spigot

5 = H : supply spigots 200mm

7 = H : supply spigots 200mm water side + fresh air spigot

8 = H : supply spigots 200mm opposite to water side + fresh air spigot

HEAT EXCHANGER EQUIPMENT:

S = Standard (Cu/Al, hydrophilic coating)

H =

Hygienic design (VDI6022, Cu/Al uncoated)

POSITION:

H = horizontal (access from below) EQUIPMENT:

V = vertical (air flow from bottom to top) S = Standard

H =

Hotel

AIR FLOW DIRECTION:

I = Direct intake / direct discharge

L = 90° intake / direct discharge ACTUATOR, OUTDOOR AIR:

0 = without

MEDIUM CONNECTION / HE ARRANGEMENT:

1 = Open/Close 230V – Return spring

3 = left / hygienic

4 = right / hygienic

ELECTRIC HEATING:

SWITCH CABINET / ARRANGEMENT / CABLES:

0 = without electric heating

1 = small switch cabinet / water side A = Single stage – 1x550W

2 = small switch cabinet / water side console / cable approx. 0.5 m B = Single stage – 1x850W

4 = small switch cabinet / opposite water connection side

C =

Single stage – 1x1100W

5 = small switch cabinet / external opposite water connection side /

D = Single stage – 1x1400W

Trailing cable approx. 2 m E = Single stage – 1x1700W

7 = large switch cabinet / water connection side / cable approx. 2 m F = Single stage – 1x2200W

8 = large switch cabinet / opposite water connection side 1 = Two-stage – 1100W (2x550W)

2 = Two-stage – 1700W (2x850W)

FAN / MOTOR TYPE AND DESIGN:

3 = Two-stage – 2200W (2x1100W)

0 = AC motor – integrated thermal contact

1 = AC motor – thermal contact led out

ELECTRIC HEATING CONTROL:

E = EC Motor – Advanced 0 = without controller

Y = EC Motor – Standard 1 =

Relay

SPEED STAGES:

A = 1,2,3 CONDENSATE REMOVAL:

B = 2,3,4 0 = without condensate drain and condensate pans

C = 3,4,5

G

=

Discharge by gravity with condensate pans

E = 1,3,5 P = with condensate pump – Universal

H = 1,2,3,4,5 F = with condensate pump – Economy

F = Continuous (for ceiling unit only)

RANGE

CAPACITY

FUNCTION / MOUNTING

MODEL

CONFIGURATION

TYPE

UNIT SIZE

AIR FUNCTION

SWITCH CABINET

CONDENSATE REMOVAL

MEDIUM FUNCTION

INSTALLATION

AND CONNECTION

FAN

CAPACITY STAGE

E-HEATING

ACTUATOR OUTDOOR AIR

UNIT

HEAT EXCHANGER

REVISION

MOUNTED

ACCESSORIES

FILTER

Unit type code – Basic unit

Type code HyFlex-Geko

8FläktGroup DC-2019-0100-GB 2022-05/R5 • Subject to modification

Control type

Module

Control panel

Controller installatio

Valve equipment

Unit type

Series

Actuator

Valve

Actuator

Valve

A 0 . 0 0 1 . Z D V G S . R 2 0 3 R 2 0 3 . 0 0 . D Z G S . 1 C 0 1 2

1 2 3 4 4 5 4 6 7 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 1 2 3 4 5 6 7 8 9

CONTROL TYPE: DISCHARGE GRILLE

A0 = Terminal box

1 =

fixed

A1 =

Module ISYteq 3010

2 =

manually adjustable

A2 =

Module ISYteq 3020

A3 =

Module ISYteq 3030 TYPE*:

01 =

Intake below – discharge above

CONTROL PACKAGE no.:

(U – recirculating air / I – air direction)

(000-999)

03 =

Intake front – discharge above

(U – recirculating air / L – air direction)

05 =

Intake below – discharge above

CONTROL PANEL:

+ unit foot cover

Z = without control panel (U – recirculating air / I – air direction)

1 = CET.ACEC

07 =

Intake front – discharge above

7 = CMT.AC + unit foot cover / + intake grille

8 = CMT.EC (U – recirculating air / L – air direction)

A = ISYteq LCD IW (M – mixed air / I, L – air direction)

B = ISYteq Touch 4.0

13 =

Intake front – discharge above

E = ,6<WHT7RXFK - intake grille

(U – recirculating air / L – air direction)

*) Description refers

) = ,6<WHT/&')6(

CONTROLLER INSTALLATION:

to a vertical unit

A = Master unit, control panel included

B = Master unit, control panel installed MODEL

D = Slave unit without control panel

C

=

Comfort

E = Economy

WATER ACCESSORIES MODEL SIZE

VGS = HyFlex-Geko valve equipment 1,2,3,4,6,8

ACTUATOR: ACCESSORIES: CASING

0 =

without

ZGS = designation for HyFlex-GeKo casing

R = 3-point – 230V

T = Open/Close – 230V

N = 3-point – 24V

Q =

Open/Close – 24V

S = 0-10V / 24V

Z = 0-10V / 230V (for 6-way valve only)

VALVE:

0 =

without

2 = 2-way

3 = 3-way (4-port)

6 = 6-way MANUFACTURER:

P = pressure-independent valve (2-port) D = Danfoss

S = Siemens (6-way valve only)

VALVE SIZE:

00 = no data

CONNECTION SIDE:

03 = k

vs

0.25 0 = Not defined

04 = k

vs

0.40 A = Valve connections on side, connection side right (hygienic HE)

06 = k

vs

0.63 B = Valve connections on side, connection side left (hygienic HE)

10 = k

vs

1.0 C = Valve connections on rear, connection side right (hygienic HE)

16 = k

vs

1.6 D = Valve connections on rear, connection side left (hygienic HE)

25 = k

vs

2.5 G = Valve connections parallel to side, connection side right

35 = k

vs

3.5 H = Valve connections parallel to side, connection side left (for hotel configuration only)

P1 = DN10LF

P2 = DN10 --- only for pressure-independent valves

P3 = DN15 VALVE ACCESSORIES:

P4 =

DN20 (cooling) / DN15HF (heating)

0 = External thread

P5 = DN25 (cooling) 1 =

Solder fitting

P6 = DN25HF (cooling) 2 =

Ball valve and external thread

61 = DN10 – k

vs

heating 0.4 / cooling 0.65 3 = Ball valve with solder fitting

62 =

DN10

–

k

vs

h

ea

ti

ng

1

.

0

/

coo

li

ng

1

.

3

4 = Supply: ball valve and external thread / Return: adjustable shut-off valve

63 =

DN10

–

k

vs

h

ea

ti

ng

1

.

6

/

coo

li

ng

1

.

9

--- for primary circuit only (6-way valve) and external thread

64 = DN20 – k

vs

heating 2.5 / cooling 3.45 5 = Supply: ball valve with solder fitting / Return: adjustable shut-off valve with solder fitting

65 = DN20 – k

vs

heating 4.25 / cooling 4.25 6 = External thread – without tubes

ELECTRICAL

ACCESSORIES

ELECTRIC

WATER

CASING

CONTROL PACKAGE

K

vs

value

K

vs

value

VALVE ACCESSORIES

CONNECTION SIDE

MANUFACTURER

ACCESSORIES – CASING

MODEL SIZE

MODEL

GRILLE

CONTROLLER

PRIMARY CIRCUIT

SECONDARY CIRCUIT

TYPE

WATER ACCESSORIES

Type code for electric, water-side accessories and unit casing

HyFlex-Geko Type code

FläktGroup DC-2019-0100-GB 2022-05/R5 • Subject to modification 9

Accessories

Unit type

Series

Equipment

Diameter

DESIGNATION

Z G S . 1 A 0 3 1 . 0 0

1 2 3 4 5 6 7 8 9 10 11 12

ACCESSORIES: CONNECTORS – DIAMETER:

ZGS = designation for HyFlex-GeKo accessories 0 = not specified

3 = DN125 – sheet steel

7 = DN200 – sheet steel

8 = DN125 – plastic

MODEL SIZE:

9 = DN200 – plastic

0 = Not defined A = Combination DN200 plastic / DN125 plastic

1,2,3,4,5,6,8 B = Combination DN200 sheet steel / DN125 sheet steel

CONNECTION FITTINGS:

0 = no connectors (factory perforation for on-site installation)

DESIGNATION:

1 = all positions provided with nozzles

A = Unit accessories

SPECIFICATION:

1 = Intake side

INTAKE SIDE:

2 = Discharge side

03 = Air intake plenum – inclined for round connector DN 200/125, not insulated 3 = other accessories

05 = Air intake bend, not insulated

07 = Air intake plenum – rectangular for round connector DN 200/125

OOTHER ACCESSORIES:

81 = Filter G1 (ISO course 5%) – fixed (not for GS8H #. ######. # E)

83 = Filter G3 (ISO course 60%) – fixed (not for GS8H #. ######. # E)

85 = Filter M5 (ISO ePM10 50%) – fixed (not for GS8H #. ######. # E)

8A = Filter G1 (ISO course 5%) – pleated

8C = Filter G3 (ISO course 60%) – pleated

8E = Filter M5 (ISO ePM10 50%) – pleated

8T = Filter G1 (ISO course 5%) – fixed (for GS8H #. ######. # E)

8V = Filter G3 (ISO course 60%) – fixed (for GS8H #. ######. # E)

8Z = Filter M5 (ISO ePM10 50%) – fixed (for GS8H #. ######. # E)

87 = Filter F7 (ISO ePM1 55%)

89 = Filter F9 (ISO ePM1 80%)

91 = Unit feet for recirculating air units

RS =

Round connector

61 = Suspension strip 750 mm

62 = Suspension strip 1250 mm

63 = Suspension strip 1650mm

K1 = Mounting kit for unit

K2 = Mounting kit for sound attenuator

71 = Connection cover DN 200, insulated

72 = Primary air facing piece, insulated

PG

=

Analogue pressure gauge 0 – 60 Pa for filter chamber F7/F9

0R = Air intake panel with rectangular opening – not insulated

0P = Air intake panel for round connector DN 200 – not insulated

B3 = Suction plenum with plastic round connector DN200, filter removal to the bottom only, not insulated

BP = Suction panel with plastic round connector DN200, filter removal to the bottom only, not insulated

11 = Flexible connection – not insulated

13 = Flexible connection transition piece – not insulated

21 = Sound attenuator – recirculating air units

31 = Internal wall mounting frame (for mixed air units)

33 = External weather grille – painted

37 = External wall mounting frame

F7 = Filter chamber F7

F9 = Filter chamber F9

DISCHARGE SIDE:

02 = Discharge plenum – for primary air connector – insulated

04 = Discharge plenum – angled for round connector, insulated

06 = Discharge plenum – Discharge bow, insulated

08 = Discharge plenum – rectangular for round connector DN 200/125, insulated

0R = Discharge panel with rectangular opening – not insulated

0P = Discharge panel for round connector DN 200 – insulated

11 = Flexible connection – not insulated

21 = Sound attenuator – recirculating air units

31 = Transition piece for grille provided by customer

G1 = Discharge grille

F7 = Filter chamber F7

F9 = Filter chamber F9

AIR SIDE AND OTHER ACCESSORIES

SPECIFICATION

MODEL SIZE

DESIGNATION

TYPE

ROUND

CONNECTORS

Type code for air side and other accessories

Safety and user instructions HyFlex-Geko

10 FläktGroup DC-2019-0100-GB 2022-05/R5 • Subject to modification

1 Safety and user instructions

This is an original Operation Manual verified by the manufacturer.

HyFlex-Geko fan coil units are developed and manufactured in accordance with the

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

Directive on Machinery.

HyFlex-Geko fan coil units are reliable in operation and satisfy strict quality standards.

Future-oriented technology and pronounced operator and maintenance friendliness

were combined in this product series.

Nevertheless, all fan coil units could pose unavoidable residual risk of injury for the

user or third parties, or risk of damage to equipment or property. Therefore your

personal safety and the proper operation of the unit depend on the strict observance

of the safety instructions. Failure to follow the safety precautions could result in death,

serious injury, environmental damage and/or considerable property damage.

Observing the safety instructions in the current Operation Manual will help avoid the

risks, ensure economical operation of the unit and let you enjoy the full benefits of the

product. The safety aspects covered by this chapter are valid for the entire Operation

Manual.

1.1 Availability of the Operation Manual

This Operation Manual contains important instructions regarding safe and proper

operation of the HyFlex-Geko fan coil unit.

This Operation Manual applies to installation companies, operators, building

technicians, technical personnel or instructed persons as well as electricians.

This manual, as well as the safety information of the manufacturer of the individual

components, must always be available at the unit’s installation site. When working on

the equipment, observe all instructions and precautions in the current Operation

Manual, in particular the chapter on safety.

1.2 Scope of the Operation Manual

This Operation Manual, as well as the instructions of the manufacturers of the

individual components, provide you with the necessary information on the areas:

– Shipping and storage

– Assembly

– Installation and electrical connection

– Commissioning and maintenance

– Disassembly and disposal

1.3 Symbols used

The following symbols are used to highlight particular text sections in this

Operation Manual:

– This symbol is used to indicate lists.

•This symbol indicates instructions to follow.

This symbol indicates the result of an action.

User instructions

User instructions provide optimal, efficient and environmentally friendly methods for

using and handling the units.

Recycling!

This symbol is used to highlight instructions on proper reuse of packaging material

and disused assembly groups (separated according to metals, plastics, etc.).

HyFlex-Geko Safety and user instructions

FläktGroup DC-2019-0100-GB 2022-05/R5 • Subject to modification 11

1.4 Safety instructions: warning and danger symbols

1.4.1 DANGER – Death/serious irreversible injury

Indicates a hazardous situation which would result in death or serious irreversible

injury if the safety instructions are not followed.

Example:

1.4.2 WARNING – Death/serious injury

Indicates a hazardous situation which can result in death or serious irreversible injury

if the safety instructions are not followed.

Example:

1.4.3 CAUTION – Minor or moderate injury possible

Indicates a hazardous situation which can result in minor or moderate injury if the

safety instructions are not followed.

Example:

Electrocution through hazardous voltage will lead to death or serious injury!

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

switched back on.

•Ensure the unit is voltage-free and isolated, ground and short-circuit the unit, and

cover or shield off adjacent live components.

Risk of rotating components!

•Risk of accidents due to rotating fan impellers.

•Disconnect the unit from the power supply before starting any work.

•Make sure that the unit is secured against being switched on again.

Sharp edges can cause injuries!

There is a risk of cuts on thin edges when cleaning fins.

•Wear protective gloves.

Safety and user instructions HyFlex-Geko

12 FläktGroup DC-2019-0100-GB 2022-05/R5 • Subject to modification

1.4.4 ATTENTION – Environmental or material damage

Indicates actions that can result in damage to equipment or property, for example.

Example:

1.5 Identification of safety instructions

The following warnings are used:

ATTENTION

Environmental damage!

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

Depending on the filtered-out materials, contaminated filters are therefore

classified as hazardous waste and must be properly disposed of according to the

prevailing directives and laws.

ATTENTION

Damage to the unit!

If dampers are shut abruptly during unit operation, the unit can be damaged

beyond repair as a result of negative pressure or overpressure.

Danger of electrical current!

This symbol indicates a risk of electrical shock that can result in serious injury,

death and material damage.

Risk of personal injury!

This symbol indicates (different from the above-mentioned danger types) a

hazardous location with a risk of personal injury including death and material

damage.

Danger due to overhead loads!

This symbol indicates a hazardous suspended load with a risk of personal injury

including death and material damage.

Danger – sharp cutting edges!

This section specifies procedures and precautions for preventing personal injury

resulting from cuts caused by sheet metal.

Risk of rotating components!

This symbol indicates hazardous rotating parts with a risk of personal injury

including death and material damage.

Environmental damage!

This symbol warns about possible damage to the environment.

Danger of scalding!

This symbol indicates a risk of scalding from leaking hot liquids that can result in

personal injury, including death and material damage.

Damage to the unit!

This symbol indicates a hazardous location with a risk of material damage that can

also lead to personal injury.

HyFlex-Geko Safety and user instructions

FläktGroup DC-2019-0100-GB 2022-05/R5 • Subject to modification 13

1.6 Safety-conscious work procedures

Observe the following instructions when carrying out installation, adjustment or repair

jobs:

•Wear suitable protective clothing during work, such as protective footwear, gloves,

safety goggles, etc.

•Avoid flame sources, especially burning cigarettes. Open flame sources and

smoking in the proximity of the unit are prohibited. Filters in general and used filters

in particular can easily catch fire.

When working within range of mains voltage:

For all kinds of work:

Electrocution through hazardous voltage will lead to death or serious injury!

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

switched back on.

•Ensure the unit is voltage-free and isolated, ground and short-circuit the unit,

and cover or shield off adjacent live components.

Danger of scalding!

Before performing work on the valves or the inlet or outlet pipes, shut off the heat-

ing medium inlet to prevent scalding. Commence work only after the heating

medium has cooled down.

•Use suitable protective equipment for all work.

Danger – sharp cutting edges!

Special care must be taken during cleaning work in view of the risk of cutting

injuries due to thin and sharp edges.

•Wear protective gloves.

Risk of rotating components!

Risk of accidents due to rotating fan impellers. Disconnect the unit from the power

supply before starting any work. Make sure that the unit is secured against being

switched on again.

Risk of personal injury!

Always wear protective gloves when shipping or installing the unit to prevent injury

caused by sharp edges.

Observe all applicable standards and work safety regulations.

ATTENTION

Environmental damage!

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

accordance with local regulations and in an ecological manner. Mixtures of

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

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

to water mixtures.

Safety and user instructions HyFlex-Geko

14 FläktGroup DC-2019-0100-GB 2022-05/R5 • Subject to modification

1.7 Proper use

HyFlex-Geko fan coils are used in the so-called normal environment according to

EN 60 721-3-3 (class 3S2 = mechanically-active substances) and are designed

exclusively for air heating, filtration and cooling. Water or water/glycol solution

(max. 50%) may be used as medium.

Units must be operated in accordance with EU 1253/2014.

The following limit values apply to the medium for operating Cu/Al heat exchangers:

The HyFlex-Geko may only be operated indoors.

HyFlex-Geko fan coil units are suitable for ceiling, suspended ceiling, wall and floor

installation.

Equipment damage!

During the installation it must be ensured that no condensation or splash water can

penetrate into electric units even if the unit or installation is damaged.

Parameter Unit Value

pH value (at 20 °C) 7.5 – 9

Conductivity (at 20 °C) microS/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

Ammonium 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

Table 1-1 Limit values for medium used in closed heating and cooling circuits

Equipment damage!

In open systems (e.g. when using well water, be sure to observe the limit values from

Tab. 1-1), the water used should additionally be cleansed of suspended matter

using a filter to be installed at the inlet. Otherwise there is a risk of erosion due to

suspended matter.

It must also be ensured that the unit is protected from dust and other substances

that can cause acidic or alkaline reaction with water (aluminium corrosion).

It is not allowed to use HyFlex-Geko units, in particular with a cooling function, for

suctioning off kitchen exhaust air containing organic acids, e.g. vinegar. Besides, it

is not allowed to clean rooms where such units are installed using cleaning agents

containing vinegar or other organic acids.

– These acids can lead to corrosion of the aluminium fins.

User instructions

The unit is considered to be used in an improper manner if it is applied for other

purposes or a purpose that is not covered by the scope of the Operation Manual.

The manufacturer or supplier is not liable for any resulting damage; the user alone

bears the full risk.

The operator is responsible for proper use.

Proper use also stipulates the observance of the Operation Manual and the

inspection and maintenance conditions defined by FläktGroup.

HyFlex-Geko Safety and user instructions

FläktGroup DC-2019-0100-GB 2022-05/R5 • Subject to modification 15

1.7.1 Units with electric heating

The units with the auxiliary electric heater may only be operated with the filters of filter

class G3 (ISO coarse 60%) or with finer filters and with the hydrophilic coated heat

exchangers (S = Standard). The filters of these units must be checked regularly for

contamination. If contamination is suspected, the filter must be replaced, if necessary

even more frequently than stated in the maintenance interval.

External accessories are allowed, but the minimum air flow volume according to Table

6-10 and Table 6-11 on page 88 must be ensured.

1.8 Improper use

The HyFlex-Geko may not be operated:

– outdoors

– in areas subject to explosion risk

– in wet areas

– in areas or rooms with strong electromagnetic fields

– in locations with high dust levels or aggressive air

– in open systems (e.g. well water) in combination with a supply line without a filter.

Risk of personal injury!

When installing the unit, be sure to maintain the following safety clearances to

potentially inflammable materials (building material classes according to

EN13501-1+A1):

- Building material class A2 -> min. 150 mm

- Building material class >B, C, D, E, F -> min. 300 mm

In addition, a safety clearance of min. 1000 mm in the air discharge direction must

be maintained for all building material classes >A1.

Personal injury and equipment damage!

Improper use can cause personal injury and equipment damage.

Safety and user instructions HyFlex-Geko

16 FläktGroup DC-2019-0100-GB 2022-05/R5 • Subject to modification

1.9 Safety regulations and codes

When carrying out installation, commissioning, maintenance and service of

HyFlex-Geko units, all local safety regulations and codes as well as generally

established technical practices must be followed.

• EN 60335-1 ed. 3 Household and similar electrical appliances.

Safety – Part 1: General requirements.

• EN 13 501-1+A1 Fire classification of construction products and building

elements – Part 1: Classification using data from reaction

to fire tests

1.10 Modifications and changes

No changes, add-ons or modifications may be performed on the HyFlex-Geko fan coil

units or their components.

Changes or modifications of the unit will invalidate the CE conformity and render all

warranty claims null and void.

1.11 Spare parts

Only original FläktGroup spare parts are allowed, since FläktGroup is not liable if

third-party spare parts are used.

1.12 Selection and qualification of personnel

User instructions

It must be ensured that every person working on the HyFlex-Geko fan coil unit has

read and understood the entire Operation Manual. It is too late to do this after work

has already begun.

Electrical and water connections must only be established by qualified licensed staff

or other individuals with proper professional training and experience in the following

areas:

– Occupational health and safety regulations

– Accident prevention regulations

– Directives and recognised codes of practice

All skilled staff must be able to assess the entrusted work and be able to recognise

and avoid all associated dangers.

HyFlex-Geko Technical description

FläktGroup DC-2019-0100-GB 2022-05/R5 • Subject to modification 17

2 Technical description

2.1 Unit components

Fig. 2-1: Unit components

Pos.1: Upper cover plate – front discharge air outlet

(rear)

Pos.2: Flange strips

Pos.3: Heat exchanger

Pos.4: Rectifier strip

Pos.5: Side parts (chassis)

Pos.6: Main condensate pan (vertical installation)

Pos.7: Filter element (mounting position depending on

version)

Pos.8: Electric switch cabinet with control electronics

Pos.9: Front heat exchanger cover plate – top

discharge air outlet

Pos.10: Front fan cover plate – top or front discharge air

outlet

Pos.11: Front heat exchanger cover plate – front

discharge air outlet

Pos.12: Main condensate pan – horizontal installation

Pos.13: Mixed air box with actuator/servo drive (mixed

air unit)

Pos.14: Unit levelling feet (recirculating air unit)

Pos.15: Lower fan cover plate – front intake (rear)

Pos.16: Fan

Pos.17: Auxiliary condensate pan – vertical installation

Pos.18: Rear fan cover plate

Pos.19: Rear heat exchanger cover plate

Pos.20: Unit casing

Pos.21: Foot trim

Pos.22: Foot trim with intake grille

Pos.23: Front trim for frontal intake

Pos.24: Rear wall

24

18

19

11

17

16

15

14

13

23

22

21

20

1

2

4

8

67910 12

5

3

Technical description HyFlex-Geko

18 FläktGroup DC-2019-0100-GB 2022-05/R5 • Subject to modification

Various unit parts indicated in Fig. 2-1 are specified in detail as follows

Heat exchanger (Pos. 3)

The heat exchanger for chilled and warm water has a connection fitting with 1/2”

internal thread as well as air vents and drain valves. Depending on unit application, the

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

2-pipe system) or with four connection fittings (water inlet and outlet in a 4-pipe

system).

Main condensate pan – vertical installation (Pos. 6)

The main condensate pan is used to collect condensate produced in the HyFlex-Geko

and serves as a holding plate for one or more fans.

Filter element (Pos. 7)

The filter element is available in filter class G1, G3 or M5 and consists of a filter mat in

a frame. G3 and M5 filters must be replaced, G1 filters can be cleaned.

Electric switch cabinet with control electronics (Pos. 8)

Depending on the unit model, the galvanised sheet steel electric switch cabinet

contains the following components:

– One or more printed circuit boards

– Contactors/relays

– Terminal block(s).

Main condensate pan – horizontal installation (Pos. 12)

The condensate pan is used to collect the condensate from the heat exchanger as well

as from valves and connection fittings and to transfer the condensate to the external

condensate line.

Mixed air box with actuator – for mixed air units (Pos. 13)

The mixed air box is fitted with leak-tight mixed air dampers. The unit is equipped with

a 230 V~ damper actuator motor. No electrical current is required to close the mixed

air damper. Mechanical limitation makes it possible to regulate the outside air rate

between 10% and 100%.

Unit feet with recirculating air units (Pos. 14)

The unit feet automatically ensure the necessary clearance for unobstructed air flow.

Fan (Pos. 16)

The fan consists of one or more centrifugal fans, which are available as single, double

or triple fans. The centrifugal fans are equipped with low-noise, maintenance-free ball

bearings. The motors can be selected as stage motors (AC) or continuously variable

(EC), motor protection is ensured through integrated (or optionally as exiting) thermal

contacts or block-up protection with an EC motor. These are performed in IP44 or IP32

protection type and insulation class F.

Auxiliary condensate pan – vertical installation (Pos. 17)

The condensate pan is used to collect condensate forming on valves and connection

fittings, as well as for collecting condensate from the main pan and draining it into the

external line.

User instructions

Depending on the configuration, the unit can also be equipped with a terminal box.

HyFlex-Geko Technical description

FläktGroup DC-2019-0100-GB 2022-05/R5 • Subject to modification 19

2.2 Material specification

2.3 Operating limits

2.3.1 Medium inlet temperature

To prevent condensate from forming on non-insulated casing parts when the temper-

ature falls below the dew point during cooling operation, certain minimum water inlet

temperatures must be maintained. These temperatures depend on the temperature

and relative humidity of the ambient air surrounding the unit and are specified in the

following diagram.

Example The room temperature is 28 °C, the relative humidity is 60%. According to the diagram

(Fig. 2-2) the minimum allowable water inlet temperature is 8 °C.

Unit part Material

Side parts (chassis) Galvanised metal sheet

Rear fan cover plate

Rear heat exchanger cover plate

Galvanised metal sheet with polyethylene thermal insulation

Heat exchanger Copper/aluminium

Fan motor Different materials

Connecting cable Different materials

Fan with casing Galvanised metal sheet; plastic

Main condensate pan Coated steel sheet with polyethylene thermal insulation on the underside

Switch cabinet with control electronics Different materials

Filter element Filter fleece, synthetic

Foot trim Galvanised and powder-coated metal sheet; plastic

Unit casing Front panel made of galvanised and powder coated or coated sheet steel; plastic

service panels and lateral components

Foot trim Galvanised metal sheet

Mixed air box Different materials

Ceiling condensate pan Galvanised metal sheet with polyethylene thermal insulation

Lateral auxiliary condensate pan Plastic

Actuator mixed air Different materials

Mixed air damper Aluminium

Electric heating rods with cable Different materials

Table 2-1 Material specification of unit components

Fig. 2-2: Minimum allowed medium inlet temperature as a function of indoor air condition; air pressure = 1013 hPa; = relative

humidity

Medium inlet temperature in °C

Room temperature in °C

Technical description HyFlex-Geko

20 FläktGroup DC-2019-0100-GB 2022-05/R5 • Subject to modification

2.3.2 External air side resistance

2.3.3 Unit and heat exchanger

User instructions

The external air side pressure drop (external pressure) must not exceed the val-

ues at which the air volume falls below the permissible minimum values specified

by the manufacturer for a specific unit type or configuration (as an approximate

estimate, pressure drops with tolerances can be considered from which a 50% re-

duction in air flow rate is resumed – see Table 2-13 on page 24).

Risk of personal injury!

For units with electric auxiliary heating, the air flow rate through the unit must not be

less than the one specified in Table 6-10 on page 90.

Unit and heat exchanger Values

Max. operating pressure/temperature 1.6 MPa (16 bar)/90 °C

Max. allowed ambient temperature 40 °C

Min. allowed ambient temperature 2 °C

Operating voltage 230 V AC, 50 Hz

Power consumption/protection class Refer to name plate

Max. discharge temperature 75 °C (fire hazard)

Table 2-2 Operating limits for unit and heat exchanger

Model

size

Capacity size heat

exchanger 1)

Maximum medium flow rate [l/h]

2-pipe

cooling or heating

circuit

4-pipe

cooling circuit heating circuit

1

M760 380 380

H760 760 380

2

M760 760 380

H1140 760 380

3

M1140 760 380

H1140 1140 380

4

M1140 760 380

H1521 1140 380

5

M1140 1140 380

H1521 1140 380

6

M2281 1140 380

H3041 2281 800

8

M2281 1140 380

H3041 2281 800

1) M = medium, H = high

Table 2-3 Maximum allowed medium flow rate

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FläktGroup HyFlex-Geko Operating instructions

FläktGroup HyFlex-Geko Operating instructions

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