Dlg/nhd-nhdu Service Ok Gb

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INSTALLATION - USE - MAINTENANCE MANUAL GB Hydronic cassette air conditioners NHD - NHDU 402÷1103 2T‘05 INDEX U I A General recommendations 2 I A Extraordinary maintenance 15 U I A Basic safety rules 2 I A Fresh air renewal 16 U I A Installation instructions 3 I A Blanking plates 16 U I A Technical Data 7 I A Branch duct and fresh air duct I A Electrical connections 8 I A Electrical wiring diagram 9 U I I A Mounting front panel assembly 14 U I A Removing filter I A I A installation and positions 17 A Controls 18 I A Control specifications 20 14 I A Dimensional drawings 24 Preliminary checks before start-up 15 I A Disposal 28 Maintenance 15 I A Troubleshooting 28 U The following symbols are used in this publication and inside the unit: U I A User Important Installer Prohibition Assistance Danger voltage NHD-NHDU 2T’05 Danger moving blade 70°C Danger high temperatures English 02/05 1 GENERAL RECOMMENDATIONS After having removed the packing, check that the contents are intact and complete. In the event of non-compliance, contact the agency which sold you the appliance. Appliances should be installed by a qualified company in accordance with the laws and regulations in force in the country of installation. Upon completion of work this company should issue the owner the declaration of compliance of installation with current regulations and standards and with the instructions given in this booklet. These appliances have been designed to heat or cool the air of rooms and should only be used for this purpose in compatibility with their performance characteristics. Under no circumstances can the Agency be held liable for damage caused to property or injury to persons or animals due to incorrect installation, regulation and maintenance or to improper use. Too low a temperature is harmful to health as well as being a useless waste of energy. Avoid prolonged direct contact with the flow of air. Avoid the room being closed for a long time. Periodically open the windows to ensure a correct change of air. BASIC SAFETY RULES U I A During storms put the installation on/off switch to "off". This instruction booklet is an integral part of the appliance and should therefore be carefully preserved and should ALWAYS accompany the appliance, also in the event of transfer to another owner or user or into another installation. Should the booklet be damaged or lost, request a copy from the Area Service Centre. Repair or maintenance work must be carried out by the Service Centre or by qualified personnel in accordance with instructions given in this booklet. Do not alter or tamper with the appliance, since hazardous situations could be created and the manufacturer of the appliance will not be liable for any damage or injury caused. U I A Using electrically-operated products implies the observance of certain basic safety rules, such as those given below: Children and unassisted handicapped persons are not allowed to use the air-conditioner. Do not touch the air-conditioner when barefoot or parts of the body are wet or damp. Do not carry out any cleaning operation until the air-conditioner has been disconnected from the main electricity supply by putting the installation on/off switch to "off". Do not alter the safety or regulating devices without the permission and instructions of the manufacturer of the air-conditioner. Do not pull, detach or twist the electric cables connected to the air-conditioner, even if disconnected from the main electricity supply. 2 English 02/05 Do not spray or throw water directly onto the air-conditioner. Do not introduce sharp, pointed objects through the air intake or outlet grilles Do not access internal parts of the air-conditioner without having first put the on/off switch to "off". Do not leave the packing material (cardboard, staples, plastic bags, etc.) within reach of children, but dispose of properly since it is a potential source of danger. Do not use oxygen, acetylene or other inflammable or poisonous gases in the refrigerant circuit, since they could cause an explosion. NHD-NHDU 2T’05 U INSTALLATION INSTRUCTIONS SAFETY CONSIDERATIONS Installation and servicing of air conditioning equipment can be hazardous due to system pressure and electrical components. Only trained and qualified personnel should service the equipment. When working on air conditioning equipment observe precautions in the literature and labels attached to the unit and other safety precautions that may apply. Follow all safety codes. Wear safety glasses and work gloves. Use quenching cloth for brazing operations. Have a fire extinguisher available for all brazing operations. I A - Check immediately for installation accessories inside the packaging. - Do not lift the unit by the condensate drain discharge pipe or by the water connections; lift it by the four corners. - Check and note the unit serial number. Before performing service or maintenance operations on the system, turn off the main power switches to the indoor unit and outdoor unit. Electrical shock could cause personal injury. To switch off the fan coil unit use only the ON-OFF button on the control panel. This avoids over-flow off the drain pan, by allowing the pump to drain any condensate water due to regulating valve losses when chiller is working. HOT & CHILLED WATER SYSTEM AIR CONDITIONERS First check the contents of the packages. The packing materials are recyclable. It is therefore recommended to place them in suitable containers for separate waste disposal. At the end of its working life, take the air-conditioner to a special waste disposal centre. INDOOR UNIT (Casing) INDOOR UNIT (Air panel) FACTORY SUPPLIED ACCESSORIES Check to ensure all factory supplied accessories are supplied with the unit. Factory supply accessory LCD Remote control Mounting Bracket Installation manual Battery External drain pan Louver Q.ty 1 1 1 2 1 1 SELECT LOCATION - Do not install the unit in rooms where flammable gas or alkaline acid substances are present.Aluminum/copper coils and/or internal plastic components can be damaged irreparably. - Do not install in workshops or kitchens; oil vapors drawn in by treated air might deposit on the coils and alter their performance or damage the internal plastic parts of the unit. - Installation of the unit will be facilitated by using a stacker and inserting a plywood sheet between the unit and the elevated stacker. - It is recommended to position the unit as centrally as possible in the room to ensure optimum air distribution. Generally the best louver position is the one which allows air diffusion along the ceiling. Alternatively intermediate positions can be selected, or the louvers can be closed completely. - Check that it is possible to remove panels from ceiling in the selected position, to allow enough clearance for maintenance and servicing operations. BEFORE INSTALLING - It is advisable to place the unit close to the installation site without removing it from the packaging. Do not put heavy tools or weights on the packaging. - Upon receipt the unit and the packaging must be checked for damage sustained in transit and if necessary, a damage claim must be filed with the shipping company. NHD-NHDU 2T’05 English 02/05 3 C INSTALLATION LOCATION Indoor Unit Install the indoor unit in a position: - Having sufficient strength to carry the weight of the indoor unit. - Where the inlet and outlet grilles are not obstructed and the conditioned air is able to blow into the room. - From where condensate can be easily run to drain. - Check the distance between the upper slab and false ceiling to ensure the unit will suit the distance. - Ensure there is sufficient space around the unit to service it. B A D B C A D A B Model A (mm) B (mm) 250 290 290 290 290 290 10 o più 10 o più 10 o più 10 o più 10 o più 10 o più NHD/U 402-502 NHD/U 602 NHD/U 702 NHD/U 802 NHD/U 902-1002 NHD/U 1103 C D A PIPE CONNECTIONS 50 0m m B m 0 50 m Electrical connections A-B: Dimensions for Opening Model INSTALLATION METHOD Cassette Indoor Unit 1. Using the installation template opening ceiling panels and install the suspension bolts as in Fig. 4 English 02/05 NHD/U 402 NHD/U 502 NHD/U 602 NHD/U 702 NHD/U 802 NHD/U 902 NHD/U 1002 NHD/U 1103 C-D: Suspension Bolts A (mm) B (mm) 590 590 590 590 750 750 950 950 590 590 590 590 750 750 950 950 C (mm) D (mm) 280 280 280 280 440 440 640 640 616 616 616 616 776 776 976 976 2. Mark position of suspension rods, water lines and condensate drain pipe, power supply cables and remote control cable. Supporting rods can be fixed, depending on the type of ceiling, as shown in Fig.. 3. Fit suspension brackets supplied with the unit to the threaded rods. Do not tighten nuts and counter nuts; this operation has to be done only after final leveling of the unit, when all the connections have been completed. NHD-NHDU 2T’05 Concrete Fixing rode M10 Wooden structure Fixing on cement ceiling 35 mm Nut Washer Nut Washer Nut Rod Washer Nut Countenut Fixing on wooden beam 4. Ensure the ceiling has a horizontal level, otherwise condensate water cannot drain. 5. The casing is fixed to the slab with 4 drop rods. The rods should have two nuts and washers to lock the unit in position.The Cassette brackets will then hook over the washers. 6. When lifting the Cassette into position care should be taken not to lift the unit by the drip tray, which could be damaged. 7. Lift the unit (without the air panel) with care by its four corners only. Do not lift the unit by the condensate drain discharge pipe or by the piping connections. 8. Incline the unit and insert it into the false ceiling. Insert the rods into the bracket slot.With minimum height (3 mm) false ceilings, it might be necessary to remove some T brackets of the false ceiling temporarily. 9. Using level guide, line up the unit with a spirit level, and keep space between the fiber glass body and the lower part of the false ceiling. 10. Line up the unit to the supporting bars of the false ceiling tightening the nuts and counter nuts of the threaded rods. 11. After connection of the condensate drain piping and piping connections, check again that the unit is level. 12. The spaces between the unit and ceiling can now be adjusted. Use the drop rods to make the adjustment. 13. Check to ensure the unit is level. The drain will then automatically be lower than the rest of the drip tray. 14. Tighten the nuts on the suspended rods. NHD-NHDU 2T’05 Rod Brackets T bar Brackets 3 mm False ceiling English 02/05 5 Water Out DRAIN PIPEWORK Indoor Unit - The unit is fitted with a condensate pump with a 500 mm. lift. - The unit is provided with 22 mm. bore flexible hose 300 mm. long. - The flexible hose should be fitted into a 22 mm. polyvinyl tube and sealed. The drain pipe must be installed with a downward slope. - On completion the drain line should be insulated. Water IN Air Purge Drain Water Purge 500 mm. DOWN SLOPE Fixing plate WATER CONNECTIONS - Water connections are fixed to the unit body to avoid breaks when pipes are connected to valve assemblies; it is advisable to tighten the connection with a spanner. - The upper coil connection is supplied with air purge valve, the lower connection with water purge valve, suitable for 8mm. wrench or screw-driver. - The coil is partially drainable; it is advisable to blow air into the coil for complete drainage. EXTERNAL DRAIN PAN ACCESSORY - Align the two (2) screw holes in the fixing plate to the two (2) holes in the external drain pan. - Make sure the drain pan is horizontal. - Tighten the two screws and make sure the external drain pan is installed flush with the fixing plate. Screw holes Screw External drain pan - When the installation is completed, it is necessary to wrap connecting pipe with insulation to prevent leakage to ceiling tile. water out ø 3/4” 60 45 30 35 35 cable through hole 43 100 248 cable through hole water in ø 3/4” drainage ø 3/4” water out ø 3/4” 60 45 35 32 68 cable through hole 288 100 43 cable through hole water in ø 3/4” drainage ø 3/4” water out ø 3/4” 60 45 External drain pan 35 Main drain pan 6 English 02/05 32 cable through hole 68 288 cable through hole 100 43 water in ø 3/4” drainage ø 3/4” NHD-NHDU 2T’05 TECHNICAL DATA Size NHD/U’05 Number of fan blowers Power Supply (V/Ph/Hz) Fan Motor Power Fan Motor Running Current Fan Motor Starting Current Operation Control & Thermostat Water Content Casing Dimensions L W D Panel Dimensions Gross Weight Connection Method Water Connection Minimum entering water temperature Maximum entering water temperature: Water side maximum pressure: NHD-NHDU 2T’05 In Out 402 502 602 702 1 1 1 1 Watt Amp. Amp. 33.5 0.105 0.45 Litre mm mm mm mm kgs 0.93 570 570 250 inch °C °C kPa 28 802 U I 902 1002 A 1103 1 1 1 1 230/1/50 36.7 54.2 70.7 82.4 100.9 136.5 193 0.18 0.24 0.32 0.371 0.438 0.589 0.844 0.53 0.72 0.96 1.1 1.31 1.956 2.532 Remote Control Handset & Wired Wall Pad (only version NHD) 0.93 1.79 1.79 2.531 2.531 3.625 3.625 570 570 570 730 730 930 930 570 570 570 730 730 930 930 250 290 290 290 290 290 290 650 x 650 x 28 850 x 850 x 28 1050 x 1050 x 28 28 31 31 42 42 60 60 Socket (Threaded Female) 3/4” 3/4” +2 +80 1400 English 02/05 7 ELECTRICAL CONNECTIONS I A ELECTRICAL CONNECTIONS - Remove the cover A and install the connection cord. - Atfer wiring is complete install the cover A. Use an approved switch between the power supply source and the unit. An isolating device must be fitted, to correctly disconnect all the power supply lines. Use a separate power supply circuit specifically for the air-conditioner. For details on the wiring method, refer to the circuit diagram inside the access door. Check that the thickness of the cable complies with the specifications of the power supply. Check the wires and make sure that they are all securely fastened following the connection of the cable. Make sure an earth leakage switch is installed in wet or damp areas. The connection cable between the outdoor and indoor unit must be suitable for outdoor use. The plug must remain accessible following the installation of the appliance, so that the appliance can be unplugged if required. If this is not possible, connect the appliance to a two-pole switch, with a distance between the contacts of at least 3mm, which must be installed in an accessible position. INTERCONNECTING WIRING We recommend that screened cable be used in electrically noisy areas. - Always separate low voltage (5VDC) signal wires from power line (230 VAC) to avoid electro-magnetic disturbance of the control system. - Do not install the unit where electromagnetic waves are directly radiated at the infra red receiver on the unit. - Install the unit and components as far away as is practical (at least 5 meters) from the electromagnetic wave source. - Where electromagnetic waves exist use shielded sensor cable. - Install a noise filter if any harmful noise exists in the power supply. 8 English 02/05 NHD-NHDU 2T’05 ELECTRICAL WIRING I A NHD 402÷702 NHD-NHDU 2T’05 English 02/05 9 NHD 802÷1103 10 English 02/05 NHD-NHDU 2T’05 NHDU NHD-NHDU 2T’05 English 02/05 11 NHDU + PCE + POWER BOX NHDU + PCE + POWER BOX without valve NHDU + PCE + POWER BOX with valve 12 English 02/05 NHD-NHDU 2T’05 NHDU + PCE / NHDU + PTH2 NHDU + PCE without valve NHDU + PTH2 without valve NHDU + PCE with valve NHDU + PTH2 with valve NHD-NHDU 2T’05 English 02/05 13 MOUNTING FRONT PANEL ASSEMBLY I A I A - Remove return grille from front panel. - Move the front panel to case. - Tighten 4 screw as shown in Fig.. FILTER REMOVAL - Unlock the two fasteners on the front panel. - Open the grille downward with care and the filter is visable - Pull the filter out along the slot. - Clean the filter and reassemble. PUSH PUSH Voltage presence when panel is open. This operation must be done by specilized technicians only. 14 English 02/05 NHD-NHDU 2T’05 I PRELIMINARY CHECKS BEFORE START-UP PRELIMINARY CHECKS BEFORE START-UP - The unit should not be started until the system piping has been cleaned and all the air has been purged. - Check condensate drainpipe slope. - Make sure that air filter is clean and properly installed. A - Ensure that voltage and current values correspond with the unit nameplate values; check electrical connections. - Verify that air outlets are not blocked. MAINTENANCE I A I A MAINTENANCE - Before performing any service or maintenance operations, turn off the main power switch. - The air filter is made of acrylic fiber and is washable in water. To remove filter simply open the intake grille by releasing the two catches. See section filter removal. - Check the filter periodically and before the operating season; clean or replace as necessary. PROLONGED UNIT SHUT-DOWN Prior to restarting the unit: - Clean or replace the air filters. - Check and remove any obstruction from the external and the internal drain pan. The appliance are intended to be installed and maintenanced by qualified service personnel and located at a level not less than 2.5m. Fan Coil Drain Pan Drain Pan fixture EXTRAORDINARY MAINTENANCE EXTRAORDINARY MAINTENANCE - The electrical panel is easily accessible by removing the cover panel. - The inspection or replacement of internal components such as; heat exchanger coil, condensate discharge pump, float, require the removal of the condensate drain pan. - For condensate drain pan removal see Figs.. - During the removal of the condensate drain pan protect the floor under the unit, with a plastic sheet, from condensate water that could be spilled. - Remove fixing screws of the drain pan fixture and remove the condensate drain pan with care. NHD-NHDU 2T’05 The appliance are intended to be installed and maintenanced by qualified service personnel and located at a level not less than 2.5m. English 02/05 15 I FRESH AIR RENEWAL FRESH AIR INTAKE - The side opening allows separate ductwork to be installed for outside air intake (opposite water connections). - Cut and remove anti-condensate insulating material. - Install your fresh air flange and ducted piping to casing. ducted piping can be made of flexible polyester with spring core or corrugated aluminum externally coated (dia.4 inch) with anti-condensate material (fiberglass 12-25 mm thickness). A NOTE: - Branch duct flange (Optional part). - Fresh air duct (Optional part). NHD/U 402÷502 Fresh Air Flange and Duct NHD/U 602÷702 Branch Air Flange and Duct Control Box Branch air: - NHD/U 402÷702: two openings each. - NHD/U 802÷1103: four openings each. Order flanges (spigots) and blanks for duct connections as accessories separately. NHD/U 802÷1103 Fresh air duct Branch duct flange TOP VIEW Branch duct flange Modello Header Control Box NHD/U 402-502 NHD/U 602-702 NHD/U 802÷902 NHD/U 1002÷1103 L H H1 570 570 730 930 278 318 318 318 125 145 145 145 I BLANKING PLATES - Peel off the cover paper to expose adhesive surface of the blanking plate. - Apply blanking plate on the supply air tunnel to cover the opening. - Press on the attaching area to firmly seal it. A NOTE: - Blanking plates (Optional part). Glue Blanking plate Supply Air Tunnel Blanking plate Unit Supply Air 16 English 02/05 NHD-NHDU 2T’05 I BRANCH DUCT AND FRESH AIR DUCT INSTALLATION (OPTIONAL) A NOTE: - Branch duct (Optional part). - Fresh air duct (Optional part). Branch Duct Fresh Air Branch Duct Model NHD/U 402÷1103 Control Box Branch Duct Ø (mm) Q.ty 100 Fresh air Ø (mm) Q.ty 2 100 1 Tapping Screw 100.00 Branch Duct and Fresh Air Duct Position 1. Look for the yellow sticker on the casing for location of branch duct or fresh air intake connections. 100.00 ø 3.00 mm. x4 Holes. 2 Ø 130 Ø 97 2. The sticker is at the center of a knock out hole underneath the casing insulation. Use a cutter and follow along the pre-cut circular marking as shown and trim off the insulation. Ø 100 Sticker Ø 50 116 4 - Ø 5,5 Ø 130 Ø 97 Ø 100 2 Ø 116 3. Knock out the pre-cut hole. 50 Model Sticker NHD/U 402÷702 NHD/U 802÷1103 4 - Ø 5,5 branch duct Dia(mm) 100 100 Qty 2 2 fresh air Dia(mm) 100 100 Qty 1 1 4. Connect the flange on to the opening with 3 mm. x 12 mm.l tapping screws. NHD-NHDU 2T’05 English 02/05 17 U CONTROLS (NHD ONLY) I A REMOTE CONTROL 1 8 1 9 2 Sleep button. Sleep mode will automatically adjust temperature and save energy when you are sleeping. Mode button. Press button to select Auto mode, Cool, Dehumidify, Fan or Heat mode. 3 2 4 10 Swing button. Air distribution angle in all mode. ON/OFF button.Pressing this button will turn the airconditioning unit on or off. Note: ON/OFF button will not work when continuous daily 3 operation is set. 11 5 Fan button. Press button to select Low, Medium, High or Auto speed. 4 12 6 Reset button. Press button to restart remote handset 7 Clock button. When you change the batteries, you must reset the clock time. After you install the new batteries, the clock time will blink.Then, press the clock button, the clock time wil not blink. Press TIMER-SET button to increase the 5 time by 1 minute step.At last press the clock button again. 8 6 13 Transmission source used for sending control signal to the air-conditioning unit 9 LCD DISPLAY 10 UP button. Press button to increase temperature 1°C step. (Max 30°C) Down button 7 Press button to decrease temperature 1°C step (Min 16°C) 11 Network button. You can set all parameters on the mas- 14 ter unit. Then, press the button for 3 seconds, and network icon will appear. all parameters have been sent to slave unit. 12 Timer-on button. Press the button once, the timer-on icon will blink. Then press TIMER-SET button to set timer- LCD Display on time in 10 minute steps. 15 16 17 1 2 Press the button again and timer-on is set. 3 4 5 14 Press the button again and timer-on mode is cancelled. 13 Timer-off button. Press the button once, the timer-off icon will blink. Then press TIMER-SET button to set timeroff time in 10 minute steps. Press the button again and timer-off is set. 6 13 Press the button again and timer-off mode is cancelled. 14 Timer-set button. When you set the time clock, press 12 7 11 10 9 8 button to increase by 1 minute step. When you set the timer-on and timer-off, press button to increase by 10 minute step. Continuous Daily Timer ON and OFF Setting Press button 1 2 3 4 5 6 7 8 9 10 18 Heating Auxiliary heating Set Temperature Signal sending Cycle Timer-on and Timer-off Swing Network Timer-off Clock icon Arrow direction in show from English 02/05 11 12 13 14 15 16 17 the first function to the second function Timer-on Sleep Fan Speed Auto Low-med-high Cooling Auto Dehumidify Fan for 3 seconds, the set cycle timer-on and timer-off icon will appear. Press button again for 3 seconds, the cycle timer-on or timer-off continuous daily operation mode is cancelled. NHD-NHDU 2T’05 WALL PAD CONTROL (OPTIONAL NHD ONLY) 3 24 25 1 23 4 1 2 3 4 5 6 7 8 9 22 2 21 5 10 6 11 12 20 7 19 8 13 14 18 9 17 15 16 16 10 17 11 18 19 20 21 12 22 13 15 14 23 24 25 For setting master-slave units using wall pad: 1 open the wall pad’s plastic box Room Temperature (°C) Display LED Signal ON/OFF Button. Pressing the button will turn the unit on or off. AM: PM: Time display Fan Speed Display. Auto, Low, Medium or High Sleep Display Swing Display Mode Button. Press the button to select Auto, Cool, Dehumidification,Ventilation or Heat mode. Fan Button. Press the button to select Auto, Low, Medium or High speed. Sleep Button. Sleep mode will automatically adjust temperature and save energy when you are sleeping. Network Button. Press the button for 3 seconds, then the network signal will appear. You can control all or each of the slave units by controlling the master unit. Temperature Up and Down Button. Press Up Button to increase temperature 1°C step. (Max: 30°C ). Press Down Button to decrease temperature 1°C step. (min: 16°C ) Swing Button Network Icon display. When the icon appears, you can change all or each of the slave units parameters by pressing TIME UP or DOWN button. After you change master unit parameters, press the enter button,The slave units parameters will change. Enter Button. In order to avoid mis-operation, all settings (except ON/OFF Button) are valid after pressing Enter Button. Clock Button. Press the clock button,“AM” lights, then press time up or down button set time. Timer-On Timer-Off Button. When the unit is on or off, press the button to set timer off or on. On and off may also be selected for continuous daily operation. Press time up or down button to set timer on or off time. Setting time (hour) Error Alarm Timer ON - Timer OFF Error Mark. If error mark 1 is shown, the room temperature sensor is malfunctioning. If error mark 2 is shown the condensate pump is malfunctioning. Unit Number. No.00 is the master unit. You can control all or each of the units by the master unit. No.01-31 are slave units. Automatic, Cool, Dehumidification,Ventilation or Heat Room Temperature Sensor. When using wall pad, the sensor automatically works instead of the main PCB's sensor. Setting Temperature (°C) Display 3 Unit N. 00 is master unit. Cut the wires of 0,1,2,3,4,5 2 you will find the figure show below in the right corner of the PCB. 5 5 4 3 2 1 4 3 2 1 0 0 4 N. 01-31 are slave units. The cut wires of 0,1,2,3,4,5 for slave settings as shown in the following table NHD-NHDU 2T’05 English 02/05 19 Use 2 LR03 AAA(1.5volt) batteries. Do not use rechargeable batteries. Replace batteries with new ones of the same type when the display becomes dim. The batteries of the remote controller must be disposed of accoriding with the country rules. REPLACING BATTERIES - HANDSET CONTROL HOW TO INSERT THE BATTERIES • Remove the battery cover. • Insert new batteries making sure that the (+) and (-) of battery are matched correctly. • Reattach the cover by sliding it back into position. U CONTROLS SPECIFICATION (NHD ONLY) ABBREVIATIONS Ts = Setting temperature Tr = Room air temperature sensor Ti = Indoor coil temperature sensor AUX = Auxiliary contact MTV = Motorized valve - CONTROL SYSTEM OPERATION MASTER AND SLAVE UNIT FUNCTION - The control board can be set either as a master unit or slave unit. Use 6 way wire and one-to-one configuration. MASTER UNIT FUNCTION - The master unit sends data on its setting to the slave unit. - The master unit settings are Unit ON/OFF, Mode, Fan Speed, Set Temperature, Swing Function, and Sleep Function (by wall pad only). SLAVE UNIT FUNCTION - The slave unit receives data on its settings from the master unit. - The slave unit is allowed to change to a locally desired setting as long as there are no subsequent changes to the settings of the master unit. - The slave units can be set individually for sleep, timer on and off function. MASTER - SLAVE INSTALLATION - When using remote handset, for the master unit ensure the JP0 jumper is closed and for the slave units JP0 is opened before turning ON the main power supply. - When using wired wall pad, JP0 jumper will not function. 20 English 02/05 - I A Use the wall pad to set master and slave units. The wall pad screen will show unit number 00 for master unit, and unit number 01-31 for slave units. See wired wall pad function guide to see how to set master and slave unit. Connect master to slave units with telephone wire. NOTE: Use 4-core cable and one-to-one configuration. When MAIN POWER SUPPLY is ON: With motorized valve: The master unit will respond with 3 beeps. The slave unit will respond with 1 beep. If there are beeping sounds from both master and slave the JP0 on both units is shorted. So, there will be no communication. If there is no beep sound, no board is set as the master unit. So, no communication will occur. Once the master unit receives the signal from the handset, the master unit will send the data. The slave unit will respond after receiving the data. AIR CONDITIONER ON/OFF - There are 3 ways to turn the system on or off: - By ON/OFF button on the handset or wired wall pad. - By programmable timer on the handset or wired wall pad. - By manual control button on the air conditioner. POWER ON SETTING - When power on signal is received by the air conditioner, the Mode, Fan Speed, Set Temperature and Swing settings will be the same as the last handset settings before the last power off. COOL MODE - If Tr≥Ts+1°C, cool operation is activated. MTV is turned on.AUX2 is closed. Indoor fan runs at set speed. NHD-NHDU 2T’05 - If Tr≤Ts, cool operation is terminated. MTV is turned off. AUX2 is opened. Indoor fan runs at set speed. - The range of Ts is 16 to 30 °C. - Indoor fan speed can be adjusted for low, medium, high and auto. - When turned on, MTV requires 30 seconds before it is fully open. - When turned off, MTV requires 120 seconds before it is fully closed. - When the unit is turned off, indoor fan will delay for 5 seconds before it is turned off. Low temperature protection of indoor coil - If Ti≤2°C for 2 minutes, MTV is turned off. AUX2 is opened. If indoor fan is set for low speed, it will run at medium speed. If it set at medium or high speed, it will keep running at the same speed. - If Ti≥5°C for 2 minutes, MTV is turned on. AUX 2 is closed. Indoor fan runs at set speed. FAN MODE - Indoor fan runs at the set speed while MTV is turned off. AUX1 and AUX2 are opened. - Indoor fan speed can be adjusted for low, medium, high and auto. HEAT MODE - If Tr≤Ts-1°C, heat operation is activated. MTV is turned on.AUX1 is closed. Indoor fan runs at set speed. - If Tr>Ts, heat operation is terminated. MTV is turned off. AUX1 is opened. Indoor fan runs according to POST HEAT condition. - The range of Ts is 16 to 30 °C. - Indoor fan speed can be adjusted for low, medium, high and auto. - When turned on, MTV requires 30 seconds before it is fully open. - When turned off, MTV requires 120 seconds before it is fully closed. - When the unit is turned off, indoor fan will delay for 5 seconds before it is turned off. Pre-Heat - If Ti<38°C, when MTV is on, AUX1 is closed and indoor fan remains off. - If Ti>38°C, when MTV is on, AUX1 is closed and Indoor fan runs at set speed. - If indoor coil temperature sensor is damaged, pre-heat time is set for 2 minutes and indoor fan runs at set speed. NHD-NHDU 2T’05 Post-Heat - If Ti>38°C, when MTV is off, AUX1 is opened and indoor fan continues to run at set speed. - If Ti<38°C, when MTV is off, AUX1 is opened. Indoor fan runs 30 seconds and stops 3 minutes repeatedly. - If indoor coil temperature sensor is damaged, post-heat time is set for 3 minutes with indoor fan running at set speed. Over heat protection of indoor coil - If Ti≥75°C, MTV is turned off, AUX1 is opened and indoor fan remains on and runs at set speed. - If Ti<70°C, MTV is turned on.AUX1 is closed and indoor fan remains on and runs at set speed. - If indoor coil temperature sensor is damaged, the protection mode will become obsolete and the unit will work as the Pre-heat and Post-heat set times. DEHUMIDIFICATION MODE - If Tr≥25°C, MTV will be ON for 3 minutes and OFF for 4 minutes. - If 16°C≤Tr<25°C, MTV will be ON for 3 minutes and OFF for 6 minutes. - If Tr<16°C, MTV will be turned off. AUTO HEAT-DEHUMIDIFICATION-COOL MODE - In auto mode, the set temperature of the system is 24°C and the indoor fan runs in auto fan mode. - If Tr<21°C, the unit will operate in heat mode. - If Tr>25°C, the unit will operate in cool mode. - If 21°C≤Tr≤25°C, the unit will operate in dehumidification mode. - Once the unit is turned on in auto mode, it will operate in that mode and will not changeover. - If the unit has been turned off for 2 hours, when turning on the unit, it will select the operating mode depending on the room temperature. AUXILIARY CONTACTS Cool mode (AUX 2) - AUX 2 is closed when MTV is on (in normal operation). - AUX 2 is opened when MTV is off or protection of indoor coil is operating. Fan mode (AUX 1 AND AUX 2) - AUX 1 and AUX 2 are opened when indoor fan is on. Heat mode (AUX 1) - AUX 1 is closed when MTV is on (in normal operation). - AUX 1 is opened when MTV is off or protection of indoor coil is operating. English 02/05 21 hours. - Changing of operation mode will cancel sleep mode. SLEEP MODE - Sleep mode can only be set in cool or heat modes. - In cool mode, after sleep mode is set, the indoor fan will run at low speed and Ts will increase 2°C during 2 hours. - In heat mode, after sleep mode is set, the indoor fan will run at auto fan mode and Ts will decrease 2°C during 2 COOLING HEAT and COOL mode SLEEP works in the following way: HEATING 0 1/2 1 SLEEP set on 2 1/2 Ts Hours since sleep set SLEEP set off 1 2 t (hr) Ts-1 Ts+2 Ts-2 Ts+1 Ts-3 Ts+1/2 Ts Hours since sleep set t (hr) SLEEP set on SLEEP set off 0 AUTO FAN SPEED - In COOL mode, if Tr 30°C the pump is off. if the entering water is < 20°C the pump is on. LED LIGHTS ITEM High speed Medium speed Low speed Pre-heat Post-heat Low temperature protection of indoor coil Over heat protection of indoor coil Coil temperature sensor damaged Room temperature sensor damaged Condensate pump damaged red led yellow led green led ON OFF OFF OFF OFF BLINK OFF ON BLINK BLINK OFF ON OFF BLINK OFF OFF BLINK BLINK OFF BLINK OFF OFF ON OFF BLINK OFF BLINK BLINK BLINK BLINK If the drain pump malfunctions, the red , yellow and green LEDs will blink with beeping sound. Press reset button or any of the remote handset buttons, and the beeping will stop. NHD-NHDU 2T’05 English 02/05 23 I DIMENSIONAL DRAWINGS A 617 650 NHD/U 402-502 24 English 02/05 NHD-NHDU 2T’05 617 650 NHD/U 602-702 NHD-NHDU 2T’05 English 02/05 25 776 850 NHD/U 802-902 26 English 02/05 NHD-NHDU 2T’05 976 1050 NHD/U 1002-1103 NHD-NHDU 2T’05 English 02/05 27 I DISPOSAL IMPORTANT INFORMATION FOR CORRECT DISPOSAL OF THE PRODUCT IN ACCORDANCE WITH EC DIRECTIVE 2002/96/EC. At the end of its working life, the product must not be disposed of as urban waste. It must be taken to a special local authority differentiated waste collection centre or to a dealer providing this service. Disposing of a household appliance separately avoids possible negative consequences for the environment and health deriving from inappropriate disposal and enables the constituent materials to be recovered to obtain significant savings in energy and resources.As a reminder of the need to dispose of household appliances separately, the product is marked with a crossed-out wheeled dustbin. U TROUBLESHOOTING PROBLEM The fan coil does not start up Insufficient output Noise and vibrations 28 English 02/05 A CHECKLIST I A REMEDY LIST No voltage - Check for presence of voltage - Check fuse on board Mains switch in the “OFF position - Place in the “ON” position Faulty room control - Check the room control Faulty fan - Check fan motor Filter clogged - Clean the filter Air flow obstructed - Remove obstacles Room control regulation - Check Incorrect water temperature - Check Air present - Vent Contact between metal parts - Check Loose screws - Tighten screws NHD-NHDU 2T’05 USEFUL INFORMATION For information on technical assistance and obtaining spare parts, contact: FIXED AIR-CONDITIONING TECHNICAL SERVICE DEPARTMENT, DE’ LONGHI GROUP via. L. Seitz, 47 - 31100 Treviso (ITALY) Numero Verde 800 019 190 U I A COD. 5773024600 (02/2005) G R O U P Dé Longhi Group - Via L. Seitz, 47 - 31100 Treviso (Italia)