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Emicon EMIBYTE DXi.H Use And Maintenance
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Emicon EMIBYTE DXi.H Use And Maintenance

Direct expansion water condensed close control units
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DIRECT EXPANSION WATER CONDENSED CLOSE CONTROL UNITS
DXi.H
WITH INVERTER COMPRESSORS
The instructions unit manuali s composed by the following:
• Conformity declaration
• Technical Manual
Instructions:
Referring to the specify
MTEC.DXi.H/DXi.HF.GB-3 Use and Maintenance technical manual DXi.H/DXi.HF series English Rev. 3 02-2021
USE AND MAINTENANCE TECHNICAL MANUAL
DXi.HF
WITH INVERTER COMPRESSORS
AND ADDITIONAL FREE-COOLING COIL
Read and understand all
the present Manual before
any intervention.
Original Instruction

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Summary of Contents for Emicon EMIBYTE DXi.H

  • Page 1 DIRECT EXPANSION WATER CONDENSED CLOSE CONTROL UNITS DXi.H DXi.HF WITH INVERTER COMPRESSORS WITH INVERTER COMPRESSORS AND ADDITIONAL FREE-COOLING COIL USE AND MAINTENANCE TECHNICAL MANUAL The instructions unit manuali s composed by the following: • Conformity declaration • Technical Manual Read and understand all Instructions: the present Manual before Referring to the specify...
  • Page 2 Emibyte DXi.H/DXi.HF Direct expansion close control The copy, transmission or memorization of the present Manual is forbidden in any form without the written authorisation from the Manufac- turer. The Manufacturer could be contacted to receive any information about his products.
  • Page 3 Emibyte DXi.H/DXi.HF Direct expansion close control INDICE 1. INTRODUCTION ..................................... 1.1 Preliminary information ..............................1.2 Instructions content and pourpose ............................. 1.3 Instruction conservation ..............................1.4 Instruction updating ................................1.5 Instruction use ................................... 1.6 Residual risks ..................................1.7 Safety symbols generality ..............................
  • Page 4 Emibyte DXi.H/DXi.HF Direct expansion close control 6.2 Remote control description ..............................6.3 Keys function ..................................6.4 User interface ..................................6.5 Password settings ................................6.6 Quick access Menu ................................6.7 Main Menu ..................................7. UNIT MAINTENANCE ..................................... 7.1 General advices .................................
  • Page 5 Emibyte DXi.H/DXi.HF Direct expansion close control 1. INTRODUCTION The copy, transmission or memorisation of the present Manual is forbidden in any form without the written authorisation from the Manufac- turer. The unit which the present Manual refers is designed only for the uses presented in the following pages, comply with their performances and characteristics.
  • Page 6 Emibyte DXi.H/DXi.HF Direct expansion close control The units are deigned to reduce at minimum the risk for the people who will use them. Anyway is impossible to eliminate completely the risk, so is strictly necessary refers to the following prescription in order to avoid them at the maximum.
  • Page 7 Emibyte DXi.H/DXi.HF Direct expansion close control ISO 3864-2 complied safety symbols : PROHIBITION Black symbol inside a red circle with red diagonal indicates a forbidden action. ADVISE A black graphic symbol inside a yellow triangle with black edges indicates a danger.
  • Page 8 Emibyte DXi.H/DXi.HF Direct expansion close control 1.8 S GENERIC DANGER Follow strictly all the advises near the symbol. Failure to follow the indications could generate user health risks. ELECTRICAL DANGER Follow strictly all the advises near the symbol. The symbol indicates unit components or, in the present Manual actions could generate electrical risks.
  • Page 9 Emibyte DXi.H/DXi.HF Direct expansion close control Every unit has a plate which contains it’s main information. The plate data could be different from the technical Manual because in the Manual are mentioned the standard unit data without any accessory. On the Serial number plate is also mentioned the refrigerant charge.
  • Page 10 Emibyte DXi.H/DXi.HF Direct expansion close control 2. SAFETY • • The oil used into the unit cooling circuit is polyester type. Anyway refers always to the compressor’s plate. to their Producers. Read carefully the following ecological information and instructions. (UNECE agreement).
  • Page 11 Emibyte DXi.H/DXi.HF Direct expansion close control The atmospheric refrigerant concentration has to be minimum reduced (lower then overmentioned professional exposition limit). Be infor- med that the steam is havier then air so high concentrations can stay near the ground, where the general ventilation is low, is suggested to ensure an adequate ventilation in order to avoid it.
  • Page 12 Emibyte DXi.H/DXi.HF Direct expansion close control 3. TECHNICAL CHARACTERISTICS Close control unit are designed and produced in compliance with 9001:2015 ISO norms for technological plants of conditioning, data center, for UPS and all the ambients where are needed special conditions and a strictly control.
  • Page 13 Therefore Emicon DXI-HF can provide extremely high energy saving granting the highest availability of the application. The unit electrical board is in compliance with the European regulations in force and has been realised inside a metal compartment: The main characteristics are the following: •...
  • Page 14 Emibyte DXi.H/DXi.HF Direct expansion close control DXi.H/DXi.HF - U DXi.H/DXi.HF - V Front suction Down suction Up discharge Up discharge Discharge Discharge Suction Suction DXi.H/DXi.HF - D DXi.H/DXi.HF - B Up suction Behind suction Down discharge Up discharge Suction Discharge...
  • Page 15 Emibyte DXi.H/DXi.HF Direct expansion close control Water sensible probe, is already wired by Manufacturer. This option has to be installed under the unit by the unit installation technicians. Manily, 230V three phase, 460V three phase, with 50/60Hz of frequency. Smoke sensible probe installed inside of the unit which activate an alarm in case of smoke presence which stops the fans and compressors.
  • Page 16 Emibyte DXi.H/DXi.HF Direct expansion close control Contained the Ethernet gateway and Master&Slave Micro pump discharging the condensing water produced by the unit provided totally installed. Micro pump discharging the condensing water produced by the unit coupled with a series, U and V version).
  • Page 17 Emibyte DXi.H/DXi.HF Direct expansion close control DXi.H Cooling capacity (Total) 10,5 12,1 17,7 20,2 21,7 25,9 35,1 ESP 20 Pa Cooling cpacity (Sensible) 11,8 15,4 18,5 21,7 24,8 31,6 ESP 20 Pa Tot. absorbed power ESP 20 Pa 1,00 0,91...
  • Page 18 Emibyte DXi.H/DXi.HF Direct expansion close control DXi.H Cooling capacity (Total) 36,4 39,4 48,0 50,9 55,0 53,7 68,1 70,6 ESP 20 Pa Cooling cpacity (Sensible) 37,5 35,0 40,7 45,4 53,4 52,8 65,3 66,2 ESP 20 Pa Tot. absorbed power 11,0 11,8...
  • Page 19 Emibyte DXi.H/DXi.HF Direct expansion close control DXi.H 1021 1142 Cooling capacity (Total) 72,2 76,4 85,9 87,3 100,3 104,6 107,4 118,9 ESP 20 Pa Cooling cpacity (Sensible) 67,0 75,8 80,1 80,7 96,5 98,0 99,4 104,5 ESP 20 Pa Tot. absorbed power...
  • Page 20 Emibyte DXi.H/DXi.HF Direct expansion close control 3.5 DXi.HF DXi.HF Cooling capacity (Total) 19,2 23,6 35,1 38,4 48,1 45,9 ESP 20 Pa Cooling cpacity (Sensible) 17,1 23,9 33,8 34,4 43,5 43,1 ESP 20 Pa Tot. absorbed power 10,8 10,8 ESP 20 Pa...
  • Page 21 Emibyte DXi.H/DXi.HF Direct expansion close control Heating capacity 10,6 16,7 24,5 24,5 31,1 31,1 5,43 5,43 Pressure drop (coil + 3 way valve) Coil internal volume 390,0 390,0 390,0 390,0 390,0 390,0 /h ) /h ) Frame n° Width 1160...
  • Page 22 Emibyte DXi.H/DXi.HF Direct expansion close control DXi.HF Cooling capacity (Total) 61,8 59,5 65,2 74,1 88,6 88,1 ESP 20 Pa Cooling cpacity (Sensible) 53,7 53,2 62,3 64,2 78,5 78,3 ESP 20 Pa Tot. absorbed power 13,7 13,0 14,3 16,3 19,7 19,5...
  • Page 23 Emibyte DXi.H/DXi.HF Direct expansion close control Heating capacity 37,4 37,4 48,9 48,9 60,8 60,8 10,6 10,6 Pressure drop (coil + 3 way valve) Coil internal volume 10,5 10,5 12,6 12,6 390,0 390,0 390,0 390,0 390,0 390,0 /h ) /h ) Frame n°...
  • Page 24 Emibyte DXi.H/DXi.HF Direct expansion close control 3.6.1 R410A DXi.H Frame Circuits n° Refrigerant charge Equivalent CO charge 13,2 15,2 DXi.H Frame Circuits n° Refrigerant charge 10,4 11,0 11,6 15,9 18,2 Equivalent CO charge 15,9 21,7 23,0 17,7 20,5 24,2 33,2 38,0 DXi.H...
  • Page 25 Emibyte DXi.H/DXi.HF Direct expansion close control The unit is designed and built for air conditioning technological environments and must be used exclusively for this pourpose within its characteristics. All the other uses are not allowed and dissolve the Manufacturer from any liability for damages caused to the peoples, animals, environment or things.
  • Page 26 Emibyte DXi.H/DXi.HF Direct expansion close control Here below are the sound data for units with canalized discharge and supply (except U version); the data refer to 1021 1142 Lw: Sound power level according to ISO 3744. MTEC.DXi.H/DXi.HF.GB-3 Use and Maintenance technical manual DXi.H/DXi.HF English...
  • Page 27 Emibyte DXi.H/DXi.HF Direct expansion close control 1021 1142 1021 1142 Lw: Sound power level according to ISO 3744. MTEC.DXi.H/DXi.HF.GB-3 Use and Maintenance technical manual DXi.H/DXi.HF English Rev. 3 02-2021...
  • Page 28 Emibyte DXi.H/DXi.HF Direct expansion close control DXi.HF Here below are the sound data for units with canalized discharge and supply (except U version); the data refer to Lw: Sound power level according to ISO 3744. MTEC.DXi.H/DXi.HF.GB-3 Use and Maintenance technical manual DXi.H/DXi.HF English...
  • Page 29 Emibyte DXi.H/DXi.HF Direct expansion close control 4. INSTALLATION Before to operate any intervention the technicians has to know perfectly the unit functioning and all its compo- nents, also for having read the present Manual. The maintenance operations has to be performed by well trained technicians in compliance with national legislation in the country of destination.
  • Page 30 Emibyte DXi.H/DXi.HF Direct expansion close control 4.4 R During the installation or any intervention it is mandatory to follow strictly any norms reported on the present Manual, to follow the onboard indications and apply every precaution in order to avoid any dangerous situation. At the unit receipt it is necessary to make a visual inspection;...
  • Page 31 Emibyte DXi.H/DXi.HF Direct expansion close control When unloading the unit, it is strongly recommended that sudden movements are avoided in order to protect internal components; unit can be lifted by using a forklift (1) or, in alternative using belts (2). Take care that the method of lifting does not damage the side panels or the cover;...
  • Page 32 Emibyte DXi.H/DXi.HF Direct expansion close control 4.9.1 The unit is designed to be connected to a chilled water cooling system. The pipes installation must be accomplished by an expert installer. nium and every material which uniti s composed. For any doubt will be necessary send to Manufacturer a chemical with the local current regulations.
  • Page 33 Emibyte DXi.H/DXi.HF Direct expansion close control After the watertight check of the system, if it’s expected that the system will be started after a long lapse or, however, that the ambient temperature could drop to values near or lower than 0°C, it will be necessary to discharge the water 4.9.4...
  • Page 34 Emibyte DXi.H/DXi.HF Direct expansion close control 4.10 4.10.1 DXi.H 2x 1/2" GAS M 2x 1/2" GAS M 1/2" M 1/2" M 3/4" 2x 1/2" GAS M 2x 1/2" GAS M 1/2" M 1/2" M 3/4" 2x 3/4" GAS M 2x 3/4" GAS M 3/4"...
  • Page 35 Emibyte DXi.H/DXi.HF Direct expansion close control to avoid corrosion problems, limestone deposit and algae microrganism proliferation. In DXi.HF units, use of glycol is always recommended. It is also possible to use water from water city systems adequately treated. In these cases, the water condenser is equipped with a pressostatic valve as optional (VP or VCP accessories): when calculating the circu- lation pump size, the pressure drop of this component must be also kept into account.
  • Page 36 Emibyte DXi.H/DXi.HF Direct expansion close control Air heat exchanger Safety valve Hot water coil High pressure switch Hot gas coil Low pressure switch Low temp. Operation up to -40°c Pressure transducer Compressor Electric heaters Modulating valve Oversized electric heaters Crank-case heater...
  • Page 37 Emibyte DXi.H/DXi.HF Direct expansion close control 4.12.2 DXi.H MTEC.DXi.H/DXi.HF.GB-3 Use and Maintenance technical manual DXi.H/DXi.HF English Rev. 3 02-2021...
  • Page 38 Emibyte DXi.H/DXi.HF Direct expansion close control 4.12.3 DXi.H MTEC.DXi.H/DXi.HF.GB-3 Use and Maintenance technical manual DXi.H/DXi.HF English Rev. 3 02-2021...
  • Page 39 Emibyte DXi.H/DXi.HF Direct expansion close control 4.12.4 DXi.H MTEC.DXi.H/DXi.HF.GB-3 Use and Maintenance technical manual DXi.H/DXi.HF English Rev. 3 02-2021...
  • Page 40 Emibyte DXi.H/DXi.HF Direct expansion close control Air heat exchanger Safety valve Hot water coil High pressure switch Hot gas coil Low pressure switch Low temp. Operation up to -40°c Pressure transducer Compressor Electric heaters Modulating valve Oversized electric heaters Crank-case heater...
  • Page 41 Emibyte DXi.H/DXi.HF Direct expansion close control 4.13.2 DXi.HF MTEC.DXi.H/DXi.HF.GB-3 Use and Maintenance technical manual DXi.H/DXi.HF English Rev. 3 02-2021...
  • Page 42 Emibyte DXi.H/DXi.HF Direct expansion close control 4.13.3 DXi.HF MTEC.DXi.H/DXi.HF.GB-3 Use and Maintenance technical manual DXi.H/DXi.HF English Rev. 3 02-2021...
  • Page 43 Emibyte DXi.H/DXi.HF Direct expansion close control MTEC.DXi.H/DXi.HF.GB-3 Use and Maintenance technical manual DXi.H/DXi.HF English Rev. 3 02-2021...
  • Page 44 Emibyte DXi.H/DXi.HF Direct expansion close control 4.14 direction In the discharge line a siphon must be made with a minimum head equal to the prevalence in fan’s suction, in any case never less than 35mm. H1 = 20 mm = Internal unit pressure difference...
  • Page 45 Emibyte DXi.H/DXi.HF Direct expansion close control The unit is designed to be supplied with water, sanitary preferably, using a suitable conduit provided with a interception shut-off valve, which has to be connected also to drain pipe in order to collect the condensation and excessive water.
  • Page 46 Emibyte DXi.H/DXi.HF Direct expansion close control The electrical cabinet is located inside on the front of the unit where are placed also the cooling circuit components. To access please remove the frontal panel. The electric connection has to be performed following the electrical diagram attached to the unit following the local and international norms.
  • Page 47 Emibyte DXi.H/DXi.HF Direct expansion close control 4.18.1 DXi.H V/~/Hz 400/3/50+N+PE V/~/Hz 24/1/50 V/~/Hz 24/1/50 V/~/Hz 400/3/50 V/~/Hz 400/3/50+N+PE V/~/Hz 24/1/50 V/~/Hz 24/1/50 V/~/Hz 400/3/50 1021 1142 V/~/Hz 400/3/50+N+PE V/~/Hz 24/1/50 V/~/Hz 24/1/50 V/~/Hz 400/3/50 4.18.2 DXi.HF V/~/Hz 400/3/50+N+PE V/~/Hz 24/1/50...
  • Page 48 Emibyte DXi.H/DXi.HF Direct expansion close control The unit must be powered with a 5-poles cable (3phases+N+PE) if the power supply is 400V/3ph/50Hz; on request is possible to provide Connect three phases and the neutral to prepared terminals of the main switch and the earth wire ti its corresponding terminal; use a power supply cable of adequate section and as short as possible in order to avoid voltage drops.
  • Page 49 Emibyte DXi.H/DXi.HF Direct expansion close control compatibility requirements. To EMC disconnection remove the EMC screw. 1) Connect to ground the PE conductor on distribution schede. 2) Use an additional ground connection wire if the shielding is inadequate (lower than conductivity of phase conductor) and there is not a simmetric ground conductor inside the wire.
  • Page 50 Emibyte DXi.H/DXi.HF Direct expansion close control 5. START UP Before to start up the unit has to be necessary perform some electric, hydraulic and cooling checks. Commissioning operations has to be performed following the previous mentioned indications. Do not switch off the unit (temporary stop) using the main switch; this device has to be used only to disconnect the unit when a current is absent, for example when the uniti s in OFF.
  • Page 51 Emibyte DXi.H/DXi.HF Direct expansion close control planned operation conditions. To switch ON the unit rotate the main switch in ON position in order to supply it. Ensure the unit is Switched OFF from the keyboard. Wait at least 12 hours before to switch on the unit so as to allow the crankcase heater to heat the oil in the compressors.
  • Page 52 Emibyte DXi.H/DXi.HF Direct expansion close control The external safety valves output connections installed on the unit are provided with a threaded connection in order to be connected to an exhaust duct, when the project or the local regulations and norms expect.
  • Page 53 Emibyte DXi.H/DXi.HF Direct expansion close control 6. USE The controller is composed by: • A control electronic card with the terminals for transmission of functioning parameters and the drive of control devices; • User interface card with programming keys and graphic display to check the operation modes and the alarm messages; the card manages the different devices which are installed in the unit, following the operation variables values;...
  • Page 54 Emibyte DXi.H/DXi.HF Direct expansion close control Connect the phone wire is coming from the card to the back terminal suitable connector. L < 50 m L < 50 m 6 5 4 3 2 1 0 J1 1 pLAN For the control panel electrical connection refer to the wiring diagram provided with the unit.
  • Page 55 Emibyte DXi.H/DXi.HF Direct expansion close control Allows the entrance to alarm display with manually reset possibility. Allows the entrance to main Menu. Back to the previous or standby mask. The below picture is the standby visualisation. Date and hour Regulation probes (SUction air “R” and discharge air “S”). In case of humidity enabled, the temperature value is alternated to humidity one.
  • Page 56 Emibyte DXi.H/DXi.HF Direct expansion close control There are three different password levels: • User: allows only to read all the parameters; • Service: allows to read all the parameters and to modify some; • Manufacturer: allows to read and modify any parameter.
  • Page 57 Emibyte DXi.H/DXi.HF Direct expansion close control Info - Inv.circl1 Z001 Out: 0 Compressor circ.1 condition (with inverter): intake and exhaust temperature, low and high T.disp: 0.0 pressure. STATUS: DeltaP: 0.0 T.suc : 0.0 Info - Circuit 1 Z002 Safety Timing Compressor safety timing circ.1 (inverter).
  • Page 58 Emibyte DXi.H/DXi.HF Direct expansion close control Info - Freecool. Z014 Shown when the FREECOOLING function is activated. Damper/valve on: ° Freec.temp.: 23.1 Freec.request: 0.0% Info - Hot Req. Z016 Request hot valve: It allows to consult the information on the heating mode.
  • Page 59 Emibyte DXi.H/DXi.HF Direct expansion close control Unit Conf. Z123 Air pressure filter (ID03) Value: Not Active Offset: Type: Closed Info - IO Z201 Start/Stop (ID01) On/Off digital input condition Value: Active Logic: HW valve: Closed Info - IO Z210 Humidifier Alarm...
  • Page 60 Emibyte DXi.H/DXi.HF Direct expansion close control Info - IO Z332 On/Off dehumidifier (NO10) Value: Active Logic: HW valve: Closed Info - IO Z333 On/Off source (NO11) Display of On/Off for remote condenser output. Value: Active Logic: HW valve: Closed Info - IO...
  • Page 61 Emibyte DXi.H/DXi.HF Direct expansion close control ON/OFF Unit On/Off To switch ON/OFF the unit enter to ON/OFF Menu and using keys move the cursor Press To enter in SET menu use l'icona e premere Can be displayed some set-point masks move through the masks using keys.
  • Page 62 Emibyte DXi.H/DXi.HF Direct expansion close control Regardless of the mask you are in, pressing key is possible to enter to Main menu using the password. Login Insert password: Select the value using , keys than pres A. Compressor (Not available) B.
  • Page 63 Emibyte DXi.H/DXi.HF Direct expansion close control Main Menu 1/10 Main Menu 2/10 A. Compressor A. Compressor B. ExV B. ExV C. Power+ C. Power+ Compressor parameters setting (manufacturer password) Thermostatic parameters setting (manufacturer password) Main Menu 3/10 C. Power+ D. Source E.
  • Page 64 Emibyte DXi.H/DXi.HF Direct expansion close control It will be possible the visualization of some masks referred to the fans and their parameters. Supply fan E001 Type: Min speed(%) : 40.0% Max speed(%) : 70.0% Manual/Dehum.speed: 20.0% Supply fan E002 Limit speed...
  • Page 65 Emibyte DXi.H/DXi.HF Direct expansion close control To enter in these menus, from “Unit settings” using keys select the desire one than press Main Menu 6/10 Unit settings Menu E. Ventilation a. Configuration F. CPY b. Regulation G. Unit settings Unit config.
  • Page 66 Emibyte DXi.H/DXi.HF Direct expansion close control Unit conf.en.IO Ga16 (Y03) Hot vlv/Cold vlv/FC Cold valve Unit conf.en.IO Ga20 Dehumi. On/Off: Unit conf.en.IO Ga23 Emergency Ventilation Enabling "emergency ventilation" function. Enable: Unit config. Ga24 Main mask info: Selection the probe type on the main mask.
  • Page 67 Emibyte DXi.H/DXi.HF Direct expansion close control Unit regulation Gb12 PI fan displaying / settings. Fan Regulation 120s Unit regulation Gb17 PI fans neutral zones displaying / settings. ° DZ Fan: Unit regulation Gb20 PI cold valve regulator displaying / settings.
  • Page 68 Emibyte DXi.H/DXi.HF Direct expansion close control Unit regulation Gb48 Temperature and High and low humidity or temperature delay alarm displaying / settings. humidity alarm Delay time: 600s Unit regulation Gb49 overload fan Main fans thermal alarm delay displaying / settings.
  • Page 69 Emibyte DXi.H/DXi.HF Direct expansion close control SCHEDULER IA03 Enable? Scheduler enablement. 10:55 05/04/2019 Sched. is not running Unit status: COMFORT SCHEDULER IA04 ECONOMY SETPOINT ° Supply 20.0 ° Economy type set point scheduler setting. Return 20.0 Humidif. 30.0 % Dehumidif.
  • Page 70 Emibyte DXi.H/DXi.HF Direct expansion close control Main Menu 10/10 Main Menu 3/10 H. Alarm logs C. Power+ I. Other settings D. Source L. Logout E. Ventilation In order to access the menus again, it is necessary to re-enter the password.
  • Page 71 Emibyte DXi.H/DXi.HF Direct expansion close control 7. UNIT MAINTENANCE Starting from 01/01/2016 the new European Regulation 517_2014, “Obligations concerning the containment, use, by all operators: (a) Keeping the equipment records (b) Correct installation, maintenance and repair of equipment (c) Leakage control...
  • Page 72 Emibyte DXi.H/DXi.HF Direct expansion close control CASE Inspection after an intervention with possible effects on the mechanical strength or after use change or in case the machine has not being working for more than two years. Replace all the components which are not suitable any more. Do not carry out checks at a higher pressure than the one indicated in the project.
  • Page 73 Emibyte DXi.H/DXi.HF Direct expansion close control After a long operation break the sight glass color check must be performed at least after 1 hour of nomianl opera- 2) Using the sight glassi s also possible to understand if the refrigerant charge is adequate; normally the charge is good if after 10’ of nomi- nal functioning there are not steam bubble on the glass.
  • Page 74 Emibyte DXi.H/DXi.HF Direct expansion close control It is forbidden to by-pass the fuses on the unit or replace them with more powerful ones. Fuses can reach very high temperatures and they can cause burns if not handled with the due precautions.
  • Page 75 Emibyte DXi.H/DXi.HF Direct expansion close control Every Every Every Daily Monthly Once year If needed 5 years 2 months 6 months Visual inspection of the coil cleaning operation / replacement r(1) Cleaning oeration of the condensate tray cleaning operation Fans noise and vibration check...
  • Page 76 Emibyte DXi.H/DXi.HF Direct expansion close control supervised by expert refrigeration technicians. During the welding and brazing operations all the heat sensitive devices must be removed or covered with wet clothes. If the intevention requires a shut-off valve or interception valve must be removed, is suggest to replace the seals with new ones.
  • Page 77 Emibyte DXi.H/DXi.HF Direct expansion close control The refrigerant released in sudden way can cause freezing burns if it comes in contact with the skin. disposal. It is forbidden to release the refrigerant in teh environment. The barred bin symbol, on the unit label, indicates the correspondence of the unit to electric and electronic device norm about the garbage.
  • Page 78 Emibyte DXi.H/DXi.HF Direct expansion close control Check the voltage of each phase of the main supply line a. The electrical panel is not powered Check the main switch is closed (I position) Check the fuses of the auxiliary circuit b. The auxiliary circuit is not powered (refer to the attached wiring diagram) 1.
  • Page 79 Emibyte DXi.H/DXi.HF Direct expansion close control 5. Room humidity too low (low humidity b. The humidity set-point is set at too low Increase the humidity set-point value alarm signal) value a. The fans are not powered Check the fans electric circuit c.
  • Page 80 Emibyte DXi.H/DXi.HF Direct expansion close control b. Discharge pressure too high Refer to point 14 Check that overheating of thermostatic valve is correct 12. Compressor high suction pressure c. Return of liquid refrigerant to compres- Check that the pressure transducer and the sor’s suction...
  • Page 81 Emibyte DXi.H/DXi.HF Direct expansion close control a. The corresponding probe is defective or Check the probe connection and its opera- 18. Probe alarm disconnected tion, if necessary replace it a. Current interruption / black out Check the main switch and the power cable Reset the protection switch ad check the b.
  • Page 82 EMICON AC SPA Technical data shown on this booklet are not binding The reference languages for the whole documentation are Italian and English. The other languages are to be considered only as guidelines.

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