121773928

8/9/2019 121773928

1/52

SWIMMING POOL DEHUMIDIFIERS

SDH-SEHSERIES

TECHNICAL MANUAL

8/9/2019 121773928

2/52

SDH-SEH Swimming pool dehumidifiers

MTSDH_SEHGB 2 REV.072008

8/9/2019 121773928

3/52



8/9/2019 121773928

4/52



8/9/2019 121773928

5/52



INDEX

Declaration of conformity page 3

Aim and contents of this manual page 6

How to keep this manual page 6

Graphic symbols page 6

Safety laws page 7

General safety guidelines page 7

Worker’s health and safety page 8

Protective equipment page 8

Safety signs page 8

Technical characteristics page 9

Technical data page 11

Performances tables page 12

Hot water coil page 16

Partial heat recovery page 17Operation limits page 18

Sound data page 18

Safety device page 19

Safety device setting page 19

Electric data page 19

Inspection page 19

Lifting and handling page 19

Location and minimum technical clearances page 20

Condensate draining connection page 21

Duct connections page 21 Air filters page 22

Hot water coil connections page 23

3 way ON-OFF valve page 23

Partial heat recovery water connections page 23

Refrigerant lay-out page 24

Electrical connections page 25

Start up page 25

Control panel page 26

Remote mechanical hygrostat page 27

Refrigerant charge checking page 27Unit switch Off page 27

Maintenance and periodic checks page 28

Refrigerant circuit repair page 28

Environment protection page 28

Unit out of service page 28

Fault finding page 29

Wiring diagrams page 30

Dimensions page 49

8/9/2019 121773928

6/52



The SDH-SEH manual, contains any information that is needed for a correct use of the equipment while safeguarding operatorsafety, according to what indicated in the actual directives on units safety.

AIM AND CONTENTS OF THIS MANUALThis manual provides basic information on the installation, operation and maintenance off the SDH-SEH unit. It is addressed tomachine operators and it enables them to use the equipment efficiently, even if they do not have any previous specific knowledge ofit.This manual describes the characteristics of the equipment at the time it is being put on the market; therefore it may not capture latertechnological improvements introduced by HIDROS SRL as part of its constant endeavour to enhance the performance, ergonomics,safety and functionality of its products.

HOW TO KEEP THIS MANUALThe manual must be always with the unit it refers to. It must be stored in a safe place, away from the dust and moisture. It must beaccessible to all users who shall consult it any time they are in doubt on how to operate the equipment.HIDROS SRL reserves the right to modify its products and related manuals without necessarily updating previous versions of thereference material. The customer shall store any updated copy of the manual or parts of it delivered by the manufacturer as anattachment to this manual.

HIDROS SRL is available to give any detailed information about this manual and to give information regarding the use and themaintenance of its own units.

GRAPHIC SYMBOLS

Indicates operations that can be dangerous for people and/or disrupts the correct operation of theequipment..

Indicates prohibited operations.

Indicates important information that the operator must follow in order to guarantee the correct operationof the equipment in complete safety

8/9/2019 121773928

7/52



SAFETY LAWS

The units single components or the complete units produced by HIDROS have been designed according to the actual CE andnational Directives. For the detailed list of the project technical Directives, refer to the CE declaration enclosed.

GENERAL SAFETY GUIDELINESBefore beginning to operate on SDH-SEH units every user must be perfectly knowledgeable about the functions of the equipmentand its controls and must have read and understood the information container in this manual.

It’s strictly forbidden to remove and/or camper with any safety device.

Any routine or not-routine maintenance operation shall be carried out when the equipment has been shutdown, disconnected from electric and pneumatic power source and after its pneumatic system has beendischarged.

Do not put your hands or insert screwdrivers, spanners or other tools into moving parts of the equipment.

The equipment supervisor and the maintenance man must receive training suitable for the performance oftheir tasks in safety

Operators must know how to use personal protective devices and must know the accident-preventionguidelines contained in national and international laws and norms.

8/9/2019 121773928

8/52



WORKERS’ HEALTH AND SAFETY The European Community has emanated some Directives about worker’s safety and health which the employers have to respectand make the others respect. For the detailed list, see the CE declaration enclosed.

Do not tamper with or replace parts of the equipment without the specific consent of the manufacturer.The manufacturer shall have no responsibility whatsoever in case of unauthorised operations.

Using components, expendable materials or spare parts that do not correspond to those recommendedby the manufacturer and/or listed in this manual may be dangerous for the operators and/or damage theequipment

The operator’s workplace must be kept clean, tidy and free from objects that may camper freemovements. Appropriate lighting of the work place shall be provided so as to allow the operator to carryout the required operations safely. Poor or too strong lighting can cause risks.

Ensure that work places are always adequately ventilated and that aspirators are working, in goodcondition and in compliance with the requirements of the laws in force...

PERSONAL PROTECTIVE EQUIPMENTWhen operating and maintaining the SDH-SEH unit, use the following personal protective equipment.

Equipment: people who make maintenance or work with the unit, must wear an equipment in accordancewith the safety Directives. They must wear accident prevention shoes with anti-slip sole where the pavingis slippery.

Gloves: During the cleanings and the maintenance operations, it’s necessary the use of appropriategloves. In case of gas recharge, it’s compulsory the use of appropriate gloves to avoid the risk offreezing.

Mask and googles: Respiratory protection (mask) and eye protection (goggles) should beused during cleaning and maintenance operations.

SAFETY SIGNSThe equipment features the following safety signs, which must be complied with:

General hazard

Electric shock hazard

8/9/2019 121773928

9/52



TECHNICAL CHARACTERISTICS

SDH-SEH dehumidifiers series are highly performances units designed for swimming pool applications where it is necessary tocontrol humidity and to prevent condensation to guarantee optimal comfort.

Frame

All SDH-SEH units are made from hot-galvanised thick sheet metal, painted with polyurethane powder enamel at 180°C to ensurethe best resistance against the atmospheric agents. The frame is self-supporting with removable panels. All screws and rivets are instainless steel. The colour of the units is RAL 7035.

Refrigerant circuitThe refrigerant gas used in these units is R407C. The refrigerant circuit is made by using international primary brands componentsand according to ISO 97/23 concerning welding procedures. The refrigerant circuit includes:sight glass,filter drier,thermal expansion valve with external equalizer,Schrader valves form maintenance and control,pressure safety device (according to PED regulation).

CompressorsThe compressors are rotary (mod.100,120) or scroll type (mod.160, 200)with crankcase heater and thermal overload protection by aklixon embedded in the motor winding. The compressors are mounted on rubber vibration dampers and they can be supplied withsound attenuation jacket to reduce the noise emission (option). The inspection on the compressors is possible only through the unitfront panel.

Condensers and evaporatorsCondensers and evaporators are made of copper pipes and aluminium fins. All evaporators are painted with epoxy powders toprevent corrosion problem due to their use in aggressive environments. The diameter of the copper pipes is 3/8” and the thickness ofthe aluminium fins is 0,1 mm. The tubes are mechanically expanded into the aluminium fins to improve the heat exchange factor.The geometry of these heat exchangers guarantees a low air side pressure drop and then the use of low rotation (and low noiseemission) fans. All units are supplied, standard, with a Stainless steel drip tray and all evaporators are supplied with a temperaturesensor used as automatic defrost probe.

FansThe fans are made of galvanized steel, centrifugal type, double inlet with forward curved blades. They are statically and dynamicallybalanced and supplied complete of the safety fan guard according to EN 294. They are mounted on the unit frame by interposition ofrubber vibration dampers. The electric motors are 4 poles (about 1500 rpm), three-phase power supply. The motors are connected tothe fans by pulleys and belts. The protection class of the motors is IP 54.

Air filter It is made of synthetic filtering media, undulated type, without electro-static charge; they are all removable for differential disposal.Efficiency class G1, according to EN 779:2002.

Electric enclosureThe electric switch board is made according to electromagnetic compatibility norms CEE 73/23 and 89/336. The accessibility to the

board is possible after removing the front panel of the unit and the OFF positioning of the main switch. The moisture protectiondegree is IP55. In all SEH (not on SDH) units are installed, standard, the compressors sequence relay who disables the operation ofthe compressor in case the power supply phase sequence is not the correct one (scroll compressors in fact, can be damaged if theyrotate reverse wise). The following components are also standard installed: main switch, magnetic-thermal switches (as a protectionfans and compressors), control circuit automatic breakers, compressor contactors, fan contactors. The terminal board is suppliedwith voltage free contacts for remote ON-OFF and general alarm.

Microprocessors All SDH-SEH units are supplied standard with microprocessor controls. The microprocessor controls the following functions:regulation of the water temperature, antifreeze protection, compressor timing, compressor automatic starting sequence, alarm reset,potential free contact for remote general alarm, alarms and operation led.

8/9/2019 121773928

10/52



Control and protection devices All units are supplied with the following control and protection devices: antifreeze protection sensor, high pressure switch withmanual reset, low pressure switch with automatic reset, high pressure safety valve, compressor thermal overload protection, fansthermal overload protection.

Test All the units are fully assembled and wired at the factory, carefully evacuated and dried after leak tests under pressure and thencharged with refrigerant R407C. They are all fully operational tested before shipment. They all conforms to European Directives andare individually marked with the CE label and provided with Conformity Declaration.

OTHER VERSIONS

Low noise version (LS) The low noise version LS is supplied with compressors jacket and complete acoustic insulation of thecompressor vane with high density sound absorption material.

ACCESSORIES

• Mechanical remote hygrostat.

• Mechanical remote hygrostat + thermostat.

• Electronic remote hygrostat.

• Remote electronic hygrostat + thermostat.

• Partial heat recovery: plate type, in molybdenum alloy steel. This allows a heat recovery capacity around 25% ofcondensing load, useful to produce hot water for sanitary use or reheat the swimming pool.

• Hot water coil: finned coil type constructed from copper tubes mechanically expanded into aluminium fins. It is installedinside the unit.

• 3 way ON-OFF valve to be connected to the hot water coil.

• Condensate discharge pump.

• High static pressure centrifugal fan.

• Air filter with frame for ducted installation.

8/9/2019 121773928

11/52



TECHNICAL DATA

SDH SEHMod.

100 120 160 200

Refrigerant gas R407C R407C R407C R407C

Dehumidification capacity (1) l/24h 93,7 124, 164,3 194,1

Dehumidification capacity (2) l/24h 61,2 81,9 107,8 127,5

Nominal input power (1) kW 1,7 2,2 2,6 3

Hot water coil capacity (3) kW 8,6 8,6 11,2 14,1

Nominal water flow l/h 750 750 980 1220

Water pressure drops kPa 17 17 15 22

Partial heat recovery kW 1,35 1,35 2,0 2,6

Nominal water flow l/h 230 230 345 400


Nominal input current (1) A 8,5 11,3 5,9 7,6

Maximum input current A

Power supply V/Ph/Hz 230/1/50 400/3˜+N/50

Total airflow m3/s 0,277 0,333 0,388 0,528

Supply fan available static pressure Pa 200 200 180 180

type rotative rotative scroll scrollCompressor

n° 1 1 1 1

Refrigerant circuit n° 1 1 1 1

Step power control 1 1 1 1

Sound power level (4) dB(A) 68 69 70 71

Sound pressure level (5) dB(A) 61 62 63 64

Length mm 800 800 800 800

Depth mm 570 570 570 570

Height mm 850 850 1750 1750

Weight Kg 133 147 159 169

Performances are referred to the following conditions:(1) Ambient temperature 30 °C relative humidity 80%.(2) Ambient temperature 30 °C relative humidity 60%.

(3) Room temperature 32°C; Water temperature 80/70°C.(4) Sound power level calculated according to ISO 3746.(5) Sound pressure level measured in free field, at 1 mt from the unit, directional factor Q=2 according to ISO 3746.

8/9/2019 121773928

12/52



SDH 100PERFORMANCE TABLES

Dehumidification capacity Input power Air temperature increase Heating capacity

[l/24h] [kW] [°C] [kW] R o o m

t e m

p e r a t u r e

Relative humidity 50%

10°C 11,8 0,9 3,7 1,4

15°C 16,4 1,0 4,4 1,6

20°C 24,0 1,1 5,4 2,0

25°C 34,6 1,3 6,7 2,4

30°C 44,9 1,4 8,0 2,8

35°C 53,9 1,5 9,1 3,2


[l/24h] [kW] [°C] [kW] R o o m

t e m p e r a t u r e

Relative humidity 60%10°C 16,5 0,9 4,2 1,6

15°C 24,4 1,1 5,2 1,9

20°C 33,8 1,2 6,4 2,3

25°C 47,6 1,3 7,9 2,8

30°C 61,2 1,4 9,5 3,4

35°C 72,6 1,6 10,9 3,8


[l/24h] [kW] [°C] [kW] R o o m

T e m p e r a t u r e


10°C 21,3 1,0 4,7 1,7

15°C 32,2 1,1 6,0 2,2

20°C 45,1 1,2 7,4 2,7

25°C 59,8 1,3 9,1 3,2

30°C 76,6 1,5 11,0 3,8

35°C 87,3 1,6 12,3 4,3


[l/24h] [kW] [°C] [kW] R o o m



10°C 27,8 1,0 5,3 1,9

15°C 40,5 1,1 6,8 2,4

20°C 56,6 1,2 8,5 3,0

25°C 73,3 1,4 10,3 3,6

30°C 93,7 1,5 12,5 4,4

35°C 105,3 1,7 14,0 4,9

NOTE: Shadowed fields refer to nominal condition capacities.

8/9/2019 121773928

13/52



SDH 120PERFORMANCE TABLES


[l/24h] [kW] [°C] [kW] R o o m

t e m

p e r a t u r e


10°C 16,5 1,1 4,0 1,7

15°C 23,1 1,3 4,9 2,1

20°C 33,6 1,5 6,1 2,6

25°C 47,5 1,7 7,6 3,2

30°C 60,4 1,9 9,0 3,7

35°C 71,7 2,0 10,2 4,2


[l/24h] [kW] [°C] [kW] R o o m



15°C 34,4 1,4 5,9 2,5

20°C 47,0 1,6 7,2 3,0

25°C 64,9 1,7 8,9 3,7

30°C 81,9 1,9 10,6 4,4

35°C 96,1 2,1 12,0 5,0


[l/24h] [kW] [°C] [kW] R o o m



10°C 30,1 1,2 5,2 2,2

15°C 45,1 1,4 6,8 2,9

20°C 62,4 1,6 8,4 3,5

25°C 81,1 1,8 10,2 4,2

30°C 101,9 2,0 12,2 5,0

35°C 115,1 2,2 13,5 5,6


[l/24h] [kW] [°C] [kW] R o o m



10°C 39,2 1,3 5,9 2,5

15°C 56,6 1,5 7,7 3,2

20°C 77,8 1,6 9,6 4,0

25°C 98,8 1,8 11,5 4,8

30°C 124,0 2,0 12,8 5,7

35°C 138,2 2,2 15,3 6,3


8/9/2019 121773928

14/52



SEH 160PERFORMANCE TABLES


[l/24h] [kW] [°C] [kW] R o o m

t e m

p e r a t u r e


10°C 21,4 1,3 4,1 2,1

15°C 29,5 1,5 4,9 2,5

20°C 43,0 1,7 6,1 3,0

25°C 61,6 1,9 7,8 3,8

30°C 79,2 2,2 9,5 4,6

35°C 94,4 2,5 11,0 5,3


[l/24h] [kW] [°C] [kW] R o o m



15°C 43,8 1,5 5,9 2,9

20°C 60,3 1,7 7,3 3,6

25°C 84,4 2,0 9,3 4,5

30°C 107,8 2,2 11,3 5,5

35°C 126,8 2,5 13,1 6,3


[l/24h] [kW] [°C] [kW] R o o m



10°C 38,5 1,4 5,3 2,6

15°C 57,5 1,6 6,8 3,4

20°C 80,3 1,8 8,7 4,2

25°C 105,8 2,0 10,8 5,2

30°C 134,6 2,3 13,1 6,4

35°C 151,9 2,6 14,8 7,1


[l/24h] [kW] [°C] [kW] R o o m



10°C 50,1 1,4 6,1 3,0

15°C 72,2 1,6 7,8 3,8

20°C 100,4 1,8 10,0 4,9

25°C 129,5 2,1 12,3 5,9

30°C 164,3 2,4 15,1 7,3

35°C 182,9 2,7 16,8 8,1


8/9/2019 121773928

15/52



SEH 200PERFORMANCE TABLES


[l/24h] [kW] [°C] [kW] R o o m

t e m

p e r a t u r e


10°C 25,3 1,5 3,4 2,4

15°C 34,9 1,7 4,2 2,9

20°C 50,9 1,9 5,2 3,6

25°C 72,9 2,2 6,7 4,5

30°C 93,8 2,5 8,1 5,4

35°C 111,9 2,8 9,4 6,3


[l/24h] [kW] [°C] [kW] R o o m



15°C 51,8 1,7 5,0 3,5

20°C 71,4 1,9 6,2 4,2

25°C 99,9 2,2 8,0 5,3

30°C 127,5 2,6 9,7 6,5

35°C 150,1 2,9 11,2 7,4


[l/24h] [kW] [°C] [kW] R o o m



10°C 45,6 1,6 4,5 3,1

15°C 68,1 1,8 5,8 4,0

20°C 95,1 2,0 7,4 5,0

25°C 125,2 2,3 9,2 6,2

30°C 159,1 2,6 11,3 7,5

35°C 179,8 3,0 12,7 8,4


[l/24h] [kW] [°C] [kW] R o o m



10°C 59,2 1,6 5,2 3,5

15°C 85,4 1,8 6,7 4,5

20°C 118,7 2,1 8,6 5,7

25°C 153,0 2,4 10,6 7,0

30°C 194,1 2,7 12,9 8,5

35°C 216,3 3,0 14,5 9,5


8/9/2019 121773928

16/52



HOT WATER COIL (ACCESSORY)

Mod. 100 120 160 200

Hot water coil capacity kW 8,6 8,6 11,2 14,1

Waterflow l/h 230 230 345 400


Nominal data are referred to room temperature 32°C and water temperature 80/70°C .

0,3

0,4

0,5

0,6

0,7

0,8

0,9

1

1,1

1,2

1,3

1,4

1,5

20 25 30 35 40 45 50 55 60 65 70

The hot water coil capacity in different conditions can be obtained multiplying the nominal capacity (See above), by the correctionfactor indicated in the table.

Water pressure drops

kPa

0

5

10

15

20

25

30

0 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500

Waterflow l/h

Thermal difference water inlet temperature – room temperature°C

SDH 100-120

SEH 160-200

8/9/2019 121773928

17/52



PARTIAL HEAT RECOVERY (OPTIONAL)

Mod. 100 120 160 200

Partial heat recovery nominal capacity kW 1,35 1,35 2,0 2,6

Water flow l/h 230 230 345 400


The nominal value refers to an ambient temperature of 30°C and outlet water temperature of 32°C (Dt 5°C).

The heat recovery capacity in different conditions can be obtained multiplying the nominal capacity (See above), by the correctionfactor indicated in the table.

0,5

0,6

0,7

0,8

0,9

1

1,1

1,2

30 32 34 36 38 40 42 44 46 48 50

Water side pressure drops

kPa

5

10

15

20

25

30

35

40

0 100 200 300 400 500

Water flow (l/h)

Ambient temperature 32°C



Outlet water temperature °C

SDH 100-120

SEH 160-200

8/9/2019 121773928

18/52



OPERATION LIMITS

R e l a t i v e h u m i d i t y ( % )

30%

40%

50%

60%

70%

80%

90%

100%

0 10 20 30 40

Room temperature (°C)

Ambient air humidityThe units are designed and built to operate with air temperatures from 15°C to 36°C, relative humidity from 50% to 99%.

Water temperatureThe units are designed and built to operate with water temperatures produced by the heat recovery from 20°C to 50°C.

Hot water coil temperatureThe maximum water temperature allowed in the hot water coils is 90°C; maximum working pressure 8 bar.

ATTENTION: The units have to be used within the operation limit indicated in the diagrams (see above).the warranty will not be valid if the units are used in ambient conditions outside the limits reported. Ifthere is the necessity to operate in conditions external to the above limits, please, contact our technicaldepartment.

SOUND DATA

SOUND LEVELS STANDARD VERSION

(Hz) Lw Lp

63 125 250 500 1K 2K 4K 8KMod.

dB dB dB dB dB dB dB dBdB dB(A) dB(A)

100 82,1 73,3 67,2 65,7 64,6 59,2 55,8 46,7 82,9 69 61

120 83,1 74,3 68,2 66,7 65,6 60,2 56,8 47,7 83,9 70 62160 84,1 75,3 69,2 67,7 66,6 61,2 57,8 48,7 84,9 71 63

200 85,1 76,3 70,2 68,7 67,6 62,2 58,8 49,7 85,9 72 64

SOUND LEVELS LOW NOISE VERSIONS (LS)

(Hz) Lw Lp

63 125 250 500 1K 2K 4K 8KMod.

dB dB dB dB dB dB dB dBdB dB(A) dB(A)

100 80,6 71,8 65,7 64,2 63,1 57,7 54,3 45,2 81,4 67,5 59,5

120 81,6 72,8 66,7 65,2 64,1 58,7 55,3 46,2 82,4 68,5 60,5

160 82,6 73,8 67,7 66,2 65,1 59,7 56,3 47,2 83,4 69,5 61,5

200 83,6 74,8 68,7 67,2 66,1 60,7 57,3 48,2 84,4 70,5 62,5

Lw: Sound power level according to ISO 3746.Lp: Sound pressure level measured at 1 mt from the unit in free field conditions direction factor Q=2 according to ISO 3746.

Standard operation

99%

8/9/2019 121773928

19/52



SAFETY DEVICESDEFROSTINGThe frost on the coil, obstructs the air flow, reduces the available exchange area and consequently the unit performances and canseriously damage the system. All the units are supplied, standard, with a control which defrost automatically the heat exchanger ifnecessary. This control provides a temperature probe (defrost thermostat) on the unit evaporator. When the defrost cycle is required,the microprocessor control (according to set parameters), switches the compressor off, while the fan remains in operation. At the end

of the defrost cycle, it is waited for the dripping time to allow the complete cleaning of the coil.

HIGH PRESSURE SWITCHThe high pressure switch stops the unit when the condensing pressure is higher than the set value. The restart is manual (you needto press the button on the pressure switch) and it can be carried out only when the pressure is under the value indicated by thedifferential set (see table below).

LOW PRESSURE SWITCH (SEH ONLY)The low pressure switch stops the unit when the evaporation pressure is lower than the set value. The restart is automatic and it canbe carried out only when the pressure is higher than the value indicated by the differential set (see table below).

DEFROST THERMOSTATIt’s a device which signals to the electronic control, the necessity to make the defrost cycle. Once the defrost cycle is activated, the

defrost thermostat determines also its conclusion.

SAFETY DEVICE SETTING

Device Set-point Differential Reset

Antifreeze thermostat °C 1 3 MANUAL

High pressure switch Bar 28 7,7 MANUAL

Low pressure switch (only SEH units) Bar 0,7 1 AUTOMATIC

ELECTRIC DATA

SDH 100-120

Power supply V/~/Hz 230/ 1 / 50 Control circuit V/~/Hz 24 / 1 / 50

Auxiliary circuit V/~/Hz 230 / 1 / 50 Fans V/~/Hz 230/1/ 50

SEH 160-200

Power supply V/~/Hz 400/ 3+N / 50 Control circuit V/~/Hz 24 / 1 / 50

Auxiliary circuit V/~/Hz 230 / 1 / 50 Fans V/~/Hz 230 / 1 / 50

INSPECTIONWhen installing or servicing the unit, it is necessary to strictly follow the rules reported on this manual, to conform to all thespecifications of the labels on the unit, and to take any possible precautions of the case. Not observing the rules reported on thismanual can create dangerous situations. After receiving the unit, immediately check its integrity. The unit left the factory in perfectcondition; any eventual damage must be questioned to the carrier and recorded on the Delivery Note before it is signed. HIDROS

must be informed, within 8 days, of the extent of the damage. The Customer should prepare a written statement of any severedamage.

LIFTING AND HANDLINGWhen unloading the unit, it is highlyrecommended to avoid any sudden move inorder to protect refrigerant circuit, coppertubes or any other unit component. Units canbe lifted by using a forklift or, in alternative,using belts, being sure that the method oflifting does not damage the lateral panels andthe cover. It is important to keep the unithorizontal at all time to avoid damages to the

internal components.

8/9/2019 121773928

20/52



LOCATION AND MINIMUM TECHNICAL CLEARANCESSDH –SEH units are designed for internal installation; it is advisable to create a proper basement, with a size similar to unit foot-print. Unit vibration level is very low: it is advisable however, to fit a rigid rubber band between basement and unit base-frame. If it isthe case, it is possible to install anti-vibration mounts (spring or rubber), to keep vibrations at a very low level. Absolute care must betaken to ensure adequate minimum technical clearances, necessary to guarantee checking and maintenance operation. For thesereasons it is necessary to observe the clearances indicated in the below table.

Mod A B C D E

100 800 0 1000 0 1000

120 800 0 1000 0 1000

160 800 0 1000 0 1500

200 800 0 1000 0 1500

WARNING: The unit should be installed so that maintenance and/or repair services be possible. Thewarranty does not cover costs due to lifting apparatus, platforms or other lifting systems required by thewarranty interventions

WARNING: All the maintenance operation must be done by TRAINED PEOPLE only.

WARNING: Before every operation of servicing on the unit, be sure that the electric supply isdisconnected.

WARNING: Inside the unit some moving components are present. Be very careful when operating in theirsurroundings even if the electric supply is disconnected.

WARNING: The top shell and discharge line of compressor are usually at high temperature level. Be verycareful when operating in their surroundings.

WARNING: Aluminium coil fins are very sharp and can cause serious wounds. Be very careful whenoperating in their surroundings.

WARNING: After servicing operation close the unit with cover panels, fixing them with locking screws.

8/9/2019 121773928

21/52



CONDENSATE DRAINING CONNECTIONSCondensate draining should be done using a flexible rubber pipe. On the condensate discharge pipe it must be installed a syphonwith a minimum height equal to the suction pressure of the fan.

SDH SEH

DUCT CONNECTIONS

All the units are provided with a centrifugal fan that canbe ducted. If supply only should be ducted, a flangedconnection with overall dimensions larger than dischargehole located on the top of the unit should be used(please refer to unit dimensional drawing). In case alsothe suction side should be ducted it is necessary to order

the accessory “air filter frame for ducted installation” inorder to connect the return duct with a flange having thesame dimensions of the filter frame (See next pictures).

WARNING: In case of ducted installations it is very important to check that the airflow is close to thenominal value with a maximum tolerance of +/-15%. Airflow outside these limits can compromise thecorrect operation.

WARNING: When ductworks are connected it is IMPORTANT to check if the airspeed through theevaporator is around 1,5÷ 2 m/s. This parameter allow the unit to operate with the maximum efficiency;so an airspeed over than 2 m/s should never been exceeded.

8/9/2019 121773928

22/52



AIR FILTERS

WARNING: SDH units are factory supplied with a standard filter frame for return ducted installation; TheSEH units are supplied standard with a filter NOT suitable for return duct installation.In case of return duct on the SEH units it is necessary to order the accessory “air filter frame for ductedinstallation FARC”.

WARNING: It is important to insert ALWAYS a filter on the suction side. If the filter is not present the unitcan have serious operation problems.

SDH UNITS

The SDH units are supplied STANDARD with a removable G1filter ; (see picture) the filter can be easily removed by slidinglaterally the cells after removal of the fixing knobs

SEH UNITS

The SEH units are supplied STANDARD with a removable G1filter ; (see picture) the filter can be easily removed byunscrewing the top screw.

The SEH units can be supplied, upon request , with the airfilter frame for ducted installation (FARC). IN this case the filteris G3 efficiency, removable laterally by sliding the cells afteropening of the fixing knobsw.

8/9/2019 121773928

23/52



HOT WATER COIL CONNECTIONS (Option)

The hot water coil allows heating of the room temperature. Inthe hot water coil hydraulic circuit it has to be installed acirculating pump and a three way valve (available asaccessories). The water connections are shown in theenclosed dimensional drawings). The diameter is ¾” female.

ON/OFF 3 WAY VALVE KIT (Option)The ON/OFF 3 way valve kit can be supplied, on request, in combination to the hot water coil. The control of the 3 way valve can bedone, by using the remote mechanical thermostat + hygrostat supplied as accessory.

PARTIAL HEAT RECOVERY HYDRAULIC CONNECTIONS (option)

The partial heat recovery allows to reject a part of the heatproduced by the unit to the swimming pool water, thus enablingneutral air temperature operation. The water connections arereported in the enclosed dimensional drawings. In the heatrecovery hydraulic circuit it has to be installed a water pump (not

supplied with the unit). The diameter of the water connections is¾” male.

8/9/2019 121773928

24/52



REFRIGERANT LAY-OUT SDH

REFRIGERANT LAY-OUT SEH

CND Condenser FL Liquid line filter

CH Charging plug MC Compressor

CPL Expansion capillary tube MFC Centrifugal fan

EV Evaporator YBP Hot gas by-pass valve

SHP High pressure switch SLP Low pressure switch

EXV Termostatic valve DSP Desuperheater

8/9/2019 121773928

25/52



ELECTRICAL CONNECTIONSThe power supply must correspond to the electric nominal data (tension, phases, frequency) reported on the label in the front panelof the unit. Power connections must be made in accordance to the wiring diagram enclosed with the unit and in accordance to thenorms in force. Power cable and line protection must be sized according to the specification reported on the wiring diagram enclosedwith the unit.

WARNING: The line voltage fluctuations can not be more than ±5% of the nominal value, while the voltageunbalance between one phase and another can not exceed 2%. If those tolerances should not berespected, please contact our Company.

WARNING: Electric supply must be in the limits shown: in the opposite case warranty will terminateimmediately. Before every operation on the electric section, be sure that the electric supply isdisconnected.

Before start-up

• Check that all power cables are properly connected and all terminals are hardly fixed.• Check that there is not any refrigerant leakage.

• Check that all water connections are properly installed and all indications on unit labels are observed.

• Before proceeding to start up check that all the cover panels are in the proper position and locked with fastening screws.

START UP All the units are provided with microprocessor control that manages all the various functions of the unit. The functions describedbelow are applied both for local board control and remote panel control.To start the unit turn the main switch ON (the inner led will light up). Activate humidity switch by rotating the knob o by pressing theinstrument keyboard depending on the type of instrument installed. At this point the fan will be started as well as the compressorafter a certain delay time.

If the unit does not start

Check if the humidity probe is set properly.

WARNING: Never modify internal wiring connections; warranty will be invalidated.

8/9/2019 121773928

26/52



CONTROL PANEL

Units are provided with signalling lighting leds that indicates unit operational status. Below is reported a brief description of theirmeaning.

Alarm led (red): indicates the unit alarm status according to the following meanings:red led ON: high pressure alarm;red led blinking: low pressure alarm;

red led and compressor led ON: compressor thermal overload alarm;red led and defrost led blinking: maximum defrost cycle time overcome;

Defrost led (yellow): indicates that the units is executing the defrost cycle;led fastly blinking: execution of drop cycle at the defrost end;

Dehumidification led (green): indicates that the control is requiring dehumidification operating mode;

Electrical supply (green): indicates that green switch has been turned in On position and the unit iselectrically supplied with the following meanings:

Led on: unit is working;led blinking slowly: Unit in stand-by; Remote On/Off from switch opened.

Heating led (green): it indicates that the control is requiring the heating mode (only with water coil option)

Compressor led (green): indicates compressor status with the following meanings:led ON: compressor running;led blinking: compressor ready to start;

8/9/2019 121773928

27/52



REMOTE MECHANICAL HYGROSTAT

The units have to be supplied with remote hygrostat to operate properly. The hygrostat , when ordered, is supplied loose and have tobe installed in the room where the humidity has to be controlled. Concerning the connections, please refer to the wiring diagramsupplied with the unit.

REMOTE MECHANICAL HYGROSTAT+THERMOSTAT

The remote mechanical hygrostat+thermostat is used in combination with the hot water coil and the 3 way valve kit. The device issupplied loose and have to be installed in the room where the humidity has to be controlled. Concerning the connections, pleaserefer to the wiring diagram supplied with the unit.

Refrigerant charge checking• After few hours the unit is working, check that sight glass shows a green colour core: if the core is yellow moisture would bepresent in the circuit. In this case it is necessary circuit dehydration to be carried out by qualified people only. Check that at the sightglass there is no continuous vapour bubbles presence. In this case additional refrigerant charge could be required. It is howeverallowed the presence of few vapour bubbles.

• Few minutes after the start up, working on summer operating mode (cooling), check that condensing temperature, isapproximately 15 °C higher than condenser inlet air temperature. Check moreover that evaporation temperature is bout 5 °C lowerthan the evaporator outlet temperature.

• Check that refrigerant superheat on the evaporator is about 5-7 °C

• Check if refrigerant sub-cooling on the condenser is about 5-7 °C.

Unit switch OFFTurn OFF the main switch.

8/9/2019 121773928

28/52



MAINTENANCE AND PERIODIC CHECKS

Any routine or not-routine maintenance operation shall be carried out when the equipment has been shutdown, disconnected from electric and pneumatic power source and after its pneumatic system has beendischarged.

It is a good rule to carry on periodic checks in order to verify the correct operation of the unit.• Check that safety and control devices work correctly as previously described (monthly).

• Check all the terminals on the electric board and on the compressor are properly fixed. Periodic cleaning of the sliding terminalsof the contactors should be done.

• Check there is no oil leakage from compressor (monthly).

• Check there is no water leakage in the hydraulic system (monthly).

• Clean filters with compressed air in the opposite direction of the air flow. If filters should be fully clogged, clean them with a water jet (monthly).

• -Check mounting of fan blades and their balancing (every 4 months).

REFRIGERANT CIRCUIT REPAIR

In the case that refrigerant circuit should be dicharged, all the refrigerant must be recovered with proper machines. Thesystem must be charged with nitrogen, using a gas bottle with a pressure reducing valve, until 15 bar pressure is reached. Anyeventual leakage must be searched with a bubble leak finder. In case bubbles appear discharge the circuit before welding withproper alloys.

WARNING: Never use oxygen instead of nitrogen: explosions may occur.

ENVIRONMENT PROTECTION According to European norms dealing with the use of depleting stratospheric ozone substances, it is forbidden to releaserefrigerants fluids in the atmosphere. They must be redelivered to the seller or to proper gathering points at the end of their

operating life. Refrigerant R407C is mentioned among controlled substances and for this reason it must be subjected to said norms.A particular care is recommended during service operations in order to reduce as much as possible any refrigerant loss.

UNIT OUT OF SERVICEOnce the unit is arrived at the end of its life and needs to be removed or replaced, the following operations are recommended:

• the unit refrigerant has to be recovered by trained people and sent to proper collecting centre;

• compressor lubricating oil has to be recovered and sent to proper collecting centre;

• the frame and various components, if not usable any longer, have to be dismantled and divided according to their nature;particularly copper and aluminium, which are present in conspicuous quantity in the unit. These operations allow easy materialrecover and recycling process, reducing environmental impact.

8/9/2019 121773928

29/52



FAULT FINDINGIn the following pages are reported the most common troubles that can cause the unit stop or an incorrect operation.

WARNING: Concerning the solutions, it is necessary to take an extreme care on the actions to adopt: anexcessive confidence may cause serious accidents to inexperienced people. It is advisable, once thecause is detected, to contact our servicing people or trained people only.

PROBLEM ACTIVATED LED POSSIBLE CAUSE CORRECTIVE ACTION

NonePower supply missing fusesopen

Provide power supply,replace fuses

Power supply led Humidistat on set Set a lower set point

Power supply led,dehumidification led

Power supply led, defrost led

Compressor thermalprotection enabled,Compressor defective

Let the compressor cooldown, try again. In case,replace compressor defective

Unit does not start; alarm redled is OFF.

Any ledElectronic board or led boarddefective

Replace defective board

Power supply led,dehumidification led

Compressor thermalprotection enabled,Compressor defective

Let the compressor cooldown, try again. In case,replace compressor defective

Fan starts, compressor doesnot start: alarm red led isOFF.



Air filter clogged Clean filter and reset unit

Low refrigerant charge Charge the systemRed alarm led Frontal panel open;, low air

flow, suction side obstructed,high pressure switch on

Close the panel, clear suctionside, reset high pressureswitch

Fan starts, compressor doesnot start: alarm red led is ON.



Red alarm led Defrost thermostat defective,low refrigerant charge Replace thermostat, chargethe systemFan starts, compressor doesnot start; alarm red led isblinking. Any led

Electronic board or led boarddefective


8/9/2019 121773928

30/52

8/9/2019 121773928

31/52

8/9/2019 121773928

32/52

8/9/2019 121773928

33/52

8/9/2019 121773928

34/52

8/9/2019 121773928

35/52

8/9/2019 121773928

36/52

8/9/2019 121773928

37/52

8/9/2019 121773928

38/52

8/9/2019 121773928

39/52

8/9/2019 121773928

40/52

8/9/2019 121773928

41/52

8/9/2019 121773928

42/52

8/9/2019 121773928

43/52

8/9/2019 121773928

44/52

8/9/2019 121773928

45/52

8/9/2019 121773928

46/52

8/9/2019 121773928

47/52

8/9/2019 121773928

48/52

8/9/2019 121773928

49/52

8/9/2019 121773928

50/52

8/9/2019 121773928

51/52



8/9/2019 121773928

52/52

HIDROS srlVia dell’Industria 535020 Brugine (Pd)Tel.+390-49-9731022Fax.+390-49-5806928

IInnffoo@@hhiiddrrooss..iitt

Documents

121773928