INVENTOR DHW-C3.5/A1-K Service Manual
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INVENTOR DHW-C3.5/A1-K Service Manual

INVENTOR DHW-C3.5/A1-K Service Manual

Air-to-water circulating heat pump systems
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Summary of Contents for INVENTOR DHW-C3.5/A1-K

  • Page 2: Table Of Contents

    CONTENTS PRODUCT INTRODUCTION ................... 2 1 MODELS LIST ..........................2 2 NOMENCLATURE ........................3 3 FUNCTION ..........................3 4 PRODUCT DATA ......................... 4 4.1 Product Data at Rated Condition ..................4 4.2 Operation Range ......................... 6 4.3 Operation Performance ...................... 6 5 PIPING DIAGRAM ........................
  • Page 3 PRODUCT...

  • Page 5: Nomenclature

    HEAT PUMP WATER HEATER PRODUCT 2 NOMENCLATURE Description Options INVENTOR Heat Pump Water Heater Heating style S= Static ,C =Circulating Heating Capacity 3.5KW Refrigerant Nb=R134a, Default=R22 Design Serial Number Power style 220~240V-1Ph-50Hz WT-SX Description Options Symbol of heat pump water...

  • Page 6: Product Data

    The unit can make and supply hot water all day in despite of night, overcast and All-day use rainy days. 4 PRODUCT DATA 4.1 Product Data at Rated Condition DHW-C3.5/A1-K DHW- C5.0/A1-K DHW-C7.2/A1-K Models Nominal Heating...
  • Page 7 HEAT PUMP WATER HEATER PRODUCT DHW-C3.8/NbA-K Models DHW-C5.0/ NbA-K Nominal Heating Capacity Btu/h 12966 17060 Power Heating 1.02 1.35 Consumption Power Supply 220-240V ~1Ph~50Hz High/Low pressure switch, compressor thermal protection, Safeties overcurrent protection, lack of phase/anti-phase protection, antifreezing protection, R134a Type R134a Refrigerant...

  • Page 8: Operation Range

    During heating, the water is heated by the unit absorbing heat energy from outside and then releasing it to the water in water tank. Heating capacity may be reduced if outdoor temperature is decreased. The following chart is for reference. DHW-C3.5/A1-K Water Yield Capacity Correction...
  • Page 9 HEAT PUMP WATER HEATER PRODUCT DHW-C5.0/A1-K Water Yield Capacity Correction D H W - C 7 . 2 / A 1 - K W a t e r Y i e l d C a p a c i t y C o r r e c t i o n DHW-C3.8/NbA-K Water Yield Capacity Correction...

  • Page 10: Piping Diagram

    HEAT PUMP WATER HEATER PRODUCT DHW-C5.0/NbA-K Water Yield Capacity Correction 5 PIPING DIAGRAM Electronic 4-way Stop Check Name compressor Capillary Filter Expansion valve Valve Valve Valve Sign Heat Heat Heat Exchange Exchanger Thermal Temperature Pressure Exchanger Name with Cross with Expansio Liquid Sensor...
  • Page 11 HEAT PUMP WATER HEATER PRODUCT w ater tank heat exchanger w ater pum p pressure sw itch expansion valve w ater inlet com pressor evaporator liquid-gas separator The energy-saving water heater makes use of heat pump. Through thermal circulation, it absorbs heat from the surroundings (air source).
  • Page 12 CONTROL...

  • Page 13: Units Control

    HEAT PUMP WATER HEATER CONTROL UNITS CONTROL 1 OPERATION FLOWCHART...

  • Page 14: Main Logic

    HEAT PUMP WATER HEATER CONTROL 2 MAIN LOGIC 2.1 Heating Mode When press ON button, if the temperature of water tank meets the heating requirements, the outdoor fan will start running. The compressor will run after 15s. If the temperature of water tank is above the set temperature, the unit will stop, and all loads will terminate.
  • Page 15 HEAT PUMP WATER HEATER CONTROL 1. Check button 2. Timer button 3. Increase button for temp and clock 4. Mode button 5. Prior button 6. Rapid button 7. Decrease button for temp and clock 8. On/off button Function description Display of rapid hot water, hot water prior, air conditioning prior Display of system time, timer, preset timer and running parameters Icons display of heating up and standby for keeping the same temperature .Display of hot water, save, preset and nightwork mode...
  • Page 16 HEAT PUMP WATER HEATER CONTROL 3.2.2 Display View nstruction to Functions and Operation of Wired Controller Notice: If there is not any button operation for 15s, the wired controller will be half light. In that case, the wired controller can be normally operated only by pressing any button to make it light. 3.2.2.1 On/off Press On/Off button to turn on the water heater.
  • Page 17 HEAT PUMP WATER HEATER CONTROL during this period and decides startup and stop of compressor according to the difference between actual water temperature and setting water temperature. Once set, it will run circularly every day. 3.2.2.3 Temperature Setting Press to increase or decrease setting water temperature. When long press it, the temperature will increase or decrease by 1 per 0.5 second.
  • Page 18 HEAT PUMP WATER HEATER CONTROL Under check state and when check codes are 00, press Timer button to set system time. In this case, the LCD displays “xx: xx” and numbers of hour will flash. Press to adjust hou. Repress timer button, and numbers of min will flash.

  • Page 19: Installation

    HEAT PUMP WATER HEATER CONTROL When malfunction occurs wired controller shields all functions except On/off and checking functions .The outdoor unit is off. If multiple malfunctions occur at the same time, error codes will be displayed in cycle. If wired controller displays malfunction, please turn off the unit and ask professionals for help. Refer to error codes in the last page for reference.
  • Page 20 HEAT PUMP WATER HEATER CONTROL Caution: During connection of wirings, pay special attention to the following items to avoid interference of electromagnetism to unit and even failure of it. 1. To ensure normal communication of unit, signal line and wiring (communication) of wired controller should separate from power cord and indoor/outdoor connection lines.
  • Page 21 INSTALLATION...

  • Page 22: Installation

    All piping lengths and distances have been taken into consideration. 1.2 Matters need Attention At delivery, the unit should be checked and any damage should be reported immediately to the carrier claims agent. 1.3 Dimension Data Model DHW-C3.5/A1-K DHW-C5.0/A1-K DHW-C7.2/A1-K DHW-C3.8/NbA-K DHW-C5.0/NbA-K...
  • Page 24 HEAT PUMP WATER HEATER INSTALLATION the following figure. Chassis of main unit 1.4.2 Installation of Insulated Water Tank Outdoor drainage joint 1. The insulated water tank should be installed and kept levelly within 5m and vertically within 3m from the master unit. It can be installed on the balcony, rooftop and floor or in the room. 2.
  • Page 25 HEAT PUMP WATER HEATER INSTALLATION Note: For safe use of water, water outlet/inlet of water tank must connect with a certain length of PPR pipe ,L •70×R2 cm R is inside radius of the pipe . Moreover, heat preservation should be conducted and metal pipe can not be used.

  • Page 26: Electric Wiring Work

    HEAT PUMP WATER HEATER INSTALLATION sleeves on both sides of the duct. 2 Not passing through the wall for connection between master unit and water tank: Wrap the circulating water pipe with insulated cotton. Cover the temperature sensor with spool. Tie them together with the earthing wire by plastic tape.
  • Page 27 HEAT PUMP WATER HEATER INSTALLATION Insulated Water Tank Main Unit Manual discharge valve A Hot Water Outlet Automatic discharge valve Water Inlet Hot water output Cut-off valve B Water Outlet Sensor 1 Temp Sensor Tube Connecter 3/8" Circulation Water Outlet Safety check valve Filter...

  • Page 28: Specification Of Power Cord & Air Switch

    Capacity of air Model Power supply switch Neutral Earthing Live wire wire wire DHW-C3.5/A1-K 220-240V 50Hz DHW-C5.0/A1-K 220-240V 50Hz 220-240V 50Hz DHW-C7.2/A1-K DHW-C3.8/NbA-K 220-240V 50Hz DHW-C5.0/NbA-K 220-240V 50Hz Notice: 1. The power cord must be copper core and working temperature should not exceed specified value.
  • Page 29 HEAT PUMP WATER HEATER INSTALLATION brown with output live wire and blue wire with output neutral wire of air switch. The end with leakage module can not be installed in the bathroom, kitchen, balcony and other wet places. 4. Coat the water temperature sensor led out by the master unit with heat-conducting silica gel, and then insert it into the temp sensing joint 2 at the bottom of water tank.
  • Page 30 MAINTENANCE...

  • Page 31: Units Maintenance

    HEAT PUMP WATER HEATER MAINTENANCE UNITS MAINTENANCE 1 ERROR CODE LIST Code Indication Error Name Source of Error Signal Control Description Comp high-pressure High-pressure switch Press ON/OFF key to clear it protection Comp low-pressure Low-pressure switch Press ON/OFF key to clear it protection Discharge protection Discharge temp.

  • Page 32: Flow Chart Of Troubleshooting

    HEAT PUMP WATER HEATER MAINTENANCE 2 FLOW CHART OF TROUBLESHOOTING High-pressure protection flow chart of trouble shooting...
  • Page 33 HEAT PUMP WATER HEATER MAINTENANCE Low-pressure protection flow chart of trouble shooting...
  • Page 34 HEAT PUMP WATER HEATER MAINTENANCE Discharge protection flow chart of trouble shooting...
  • Page 35 HEAT PUMP WATER HEATER MAINTENANCE Water-pressure protection flow chart of trouble shooting Communication failure flow chart of trouble shooting...

  • Page 36: Wiring Diadram

    HEAT PUMP WATER HEATER MAINTENANCE Temperature sensor failure flow chart of trouble shooting 3 WIRING DIADRAM DHW-C3.5/A1-K DHW-C5.0/A1-K 1) Model:...
  • Page 37 HEAT PUMP WATER HEATER MAINTENANCE DHW-C7.2/A1-K 2) Model: DHW-C3.8/NbA-K 3) Model:...
  • Page 38 HEAT PUMP WATER HEATER MAINTENANCE DHW-C5.0/NbA-K 4) Model: Specification: The wires in the imaginal diagram are connected by consumer . 5) Model: WT-150LC-K WT-200LC-K WT-250LC-K WT-300LC-K...

  • Page 39: Disassembly And Assembly Procedure Of Main Parts

    HEAT PUMP WATER HEATER MAINTENANCE 4 DISASSEMBLY AND ASSEMBLY PROCEDURE OF MAIN PARTS Disassembly and Assembly of Compressor Remark: Make sure that there isn’t any refrigerant in pipe system and the power supply is cut off before removal of the compressor. Step Illustration Handling Instruction...
  • Page 40 HEAT PUMP WATER HEATER MAINTENANCE Put a new compressor in the corresponding 5 Fix the new position. compressor Tighten the fixing screw of compressor. the chassis Do not install the compressor up-side-down. Solder the connectin pipe of the compressor Connect the to make then connected inlet During...
  • Page 41 HEAT PUMP WATER HEATER MAINTENANCE 9 Recharge Recharge refrigerant via freon inlet. The refrigerant volume should accord with refrigerant via the nameplate. freon inlet. Disassembly and Assembly of 4-way Valve Remark: Make sure that there isn’t any refrigerant in pipe system and the power supply is cut off before removal of the4-way valve.
  • Page 42 HEAT PUMP WATER HEATER MAINTENANCE Wrap the valve with wet cloth in case of burnt gliding block and entering of water. Weld the pipeline. 4. Connet the pipe of 4-way During welding, charge nitrogen valve with system pipeline. 0.5±0.1kgf/cm (relative Weld them.
  • Page 43 HEAT PUMP WATER HEATER MAINTENANCE Put the heat exchanger in the specific position. Match the pipes 3 Mount the heat exchanger corerctly. Avoid hiting other pipe or parts. Connect pipe heat exchanger. Wrap the pipe with wet cloth and weld them. During welding, charge...
  • Page 44 HEAT PUMP WATER HEATER MAINTENANCE The model of new electronic expansion valve should be the same as that of the origianl one. Wrap the valve with wet cloth in case of burnt gliding block and Wled electronic entering of water. expansion valve.

  • Page 45: Exploded Views

    Mount a new water pump. Mount electric box and electric box cover. Mount back side panel and top cover. Connect water pipe. 5. Exploded Views DHW-C3.5/A1-K DHW-C5.0/A1-K Exploded views: Name of part Part code Quantity panel grill panel Axial Flow Fan...
  • Page 46 HEAT PUMP WATER HEATER MAINTENANCE support rack condenser Sub-Assy 011330632 electrical box cover Top Cover mainboard transformer of power supply capacitance grille nets capacitance Terminal Board back baffle solenoid coil solenoid valve strainer pump Terminal box Sub-Assy right Side Plate Handle Terminal Board installation baord of electric parts...
  • Page 47 HEAT PUMP WATER HEATER MAINTENANCE DHW-C7.2/A1-K Exploded views: Parts List Name of part Part code Quantity panel grill 22415001 panel 01305015 Axial Flow Fan 10335257 fan motor 15702800 motor support 01705003 front baffle 01352801P pump 43130322 support rack Sub-Assy 01892810P condenser 01152240 connect Board...
  • Page 48 HEAT PUMP WATER HEATER MAINTENANCE electrical box 01422805 electrical box 01892813 condenser Sub-Assy 01133464 isolation Sub-Assy 01233038 Terminal box Sub-Assy 01422806 Terminal Board 42010265 compressor Sub-Assy 00101156 4way value 43000403 High-pressure switch 4602001001 right Side Plate 01305013 freon inlet(R22) 06120011 Handle 26235254 solenoid coil...
  • Page 49 HEAT PUMP WATER HEATER MAINTENANCE Parts List Name of part Part code Quantity panel grill 22413431 panel 01533012 Axial Flow Fan 10333004 150130674 fan motor 150130671 motor support 0170310201 front baffle 01352803P lower panel Sub-Assy 02222803 01139406 condenser 01152805 support rack 01892819 support rack 01892816...
  • Page 50 HEAT PUMP WATER HEATER MAINTENANCE Note only is part of DHW-C3.8/NbA-K Model. only is part of DHW-C5.0/NbA-K Model. Water tank Exploded views:...
  • Page 51 HEAT PUMP WATER HEATER Parts List Part Code Name of part Quantity WT_LC-K WT_LC/B1-K Drainage Pipe Sub-Assy 04362821 Bottom Cover Plate 0126280601P 01262806P 01262806P 0126280602P 0126280602P 0126280602P 0126280601P 01262806P 01262806P 0126280602P Fixation Bracket (Outside) 01802819P Body Of Outdoor Unit 01512819P 01512818P 0151281801P 0151281802P 0151281803P 0151281804P 01512815P...

This manual is also suitable for:

Dhw-c5.0/a1-kDhw-c3.8/nba-kDhw-c5.0/nba-kWt-sx 150lc/b1-kWt-sx 200lc/b1-kWt-sx 250lc/b1-k ... Show all

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