ML ELECTRONICS MegaLife ML-RS-Dm30/NaA-M Owner's Manual
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ML ELECTRONICS MegaLife ML-RS-Dm30/NaA-M Owner's Manual

Direct heating & circulating air source heat pump water heater
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Owner's Manual
Original Instructions
Direct Heating & Circulating Air Source Heat Pump
Water Heater
Models:
RS-Dm30/NaA-M
RS-Dm40/NaA-M
RS-Dm60/NaA-M

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Summary of Contents for ML ELECTRONICS MegaLife ML-RS-Dm30/NaA-M

  • Page 1 Owner's Manual Original Instructions Direct Heating & Circulating Air Source Heat Pump Water Heater Models: RS-Dm30/NaA-M RS-Dm40/NaA-M RS-Dm60/NaA-M...
  • Page 2 To Users Thank you for selecting product. Please read this instruction manual carefully before installing and using the product, so as to master and correctly use the product. In order to guide you to correctly install and use our product and achieve expected operating effect, we hereby instruct as below: (1) This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental capabilities, or lack of experience and knowledge, unless...
  • Page 3 Exception Clauses Manufacturer will bear no responsibilities when personal injury or property loss is caused by the following reasons: (1) Damage the product due to improper use or misuse of the product; (2) Alter, change, maintain or use the product with other equipment without abiding by the instruction manual of manufacturer;...

  • Page 4: Table Of Contents

    Contents 1 Safety Notices (Please be sure to abide ) ............... 1 2 Product Type ......................1 3 Nomenclature ......................3 4 Operating Principle ....................3 4.1 Operating Principle ......................3 4.2 System Diagram ........................ 3 4.3 Process Descriptions ......................4 5 Technical Data Table ....................

  • Page 5: Safety Notices (Please Be Sure To Abide )

    Direct Heating & Circulating Air Source Heat Pump Water Heater 1 Safety Notices (Please be sure to abide ) Warning: If not abide strictly, it may cause severe damage to the unit or the people. Note: If not abide strictly, it may cause slight or medium damage to the unit or the people.

  • Page 6: Product Type

    Direct Heating & Circulating Air Source Heat Pump Water Heater (5) Turn on or turn off the unit in this instruction manual is turning on or turning off the controller; Cut off the power indicates stop supplying power to the unit. (6) Do not expose this unit in damp environment directly.

  • Page 7: Nomenclature

    Direct Heating & Circulating Air Source Heat Pump Water Heater 3 Nomenclature □ □ □ Description Options Product code RS—Export heat pump water heater D—Direct heating;C—Circulating heating;S—Static heating; Heating method Dm-Direct heating modular ; Cm- Circulating modular Functions Q—Multifunctional;Null for single function Heating capacity code Nominal heating capacity(Unit:kW) Inverter system...

  • Page 8: System Diagram

    Direct Heating & Circulating Air Source Heat Pump Water Heater 4.2 System Diagram Notices: Generally, air source heat pump water heating system is composed of direct recurrent model water heater and insulating water tank, including auxiliary devices such as connecting pipes, water pumps, valves and so on.

  • Page 9: Technical Data Table

    Direct Heating & Circulating Air Source Heat Pump Water Heater 5 Technical Data Table Model RS-Dm30/NaA-M RS-Dm40/NaA-M RS-Dm60/NaA-M Heating capacity Heating power input Heating current input 14.5 Coefficient of performance 3.83 Rated power input 10.5 Rated current input 35.4 Nominal hot water output 1300 Leaving water temperature: default setting is 55°...
  • Page 10 Direct Heating & Circulating Air Source Heat Pump Water Heater Outdoor ambient temperature: 20° C DB/15° C WB; Water inlet temperature: 15° C; Water outlet temperature: 55° C; Voltage: 380V 3N/50Hz. ② Applicable range:ambient temperature of -26° C~46° C. ③ The above pressure values all belong to gauge pressure. ④...

  • Page 11: Capacity Correction Chart

    Direct Heating & Circulating Air Source Heat Pump Water Heater 6 Capacity Correction Chart Circulating water flow 5.3m /h,Outdoor ambient temperature(DB/WB ° C) Water inlet model temperature(° C) -7/-8 20/15 30/22 35/24 46/28 9.71 15.55 21.98 28.12 33.00 32.67 36.28 Heating 9.51 15.49...
  • Page 12 Direct Heating & Circulating Air Source Heat Pump Water Heater Water outlet temperature 55° C,Outdoor ambient temperature(DB/WB° C) Water inlet model temperature(° C) -7/-8 20/15 30/22 35/24 46/28 9.21 16.38 23.32 30.55 34.60 34.36 40.94 9.40 16.38 23.90 30.95 34.12 34.02 40.32 Heating...
  • Page 13 Direct Heating & Circulating Air Source Heat Pump Water Heater Water outlet temperature 70° C,Outdoor ambient temperature(DB/WB° C) Water inlet model temperature(° C) -7/-8 20/15 30/22 35/24 46/28 23.35 30.66 23.69 31.21 Heating Capacity(kW) 23.63 31.07 23.27 31.72 9.24 9.60 9.55 9.86 Heating Power...
  • Page 14 Direct Heating & Circulating Air Source Heat Pump Water Heater Water outlet temperature 55° C,Outdoor ambient temperature(DB/WB° C) Water inlet model temperature(° C) -7/-8 20/15 30/22 35/24 46/28 12.61 22.47 34.10 40.43 46.16 46.08 52.10 13.18 22.21 33.49 40.22 46.20 45.01 51.21 Heating...
  • Page 15 Direct Heating & Circulating Air Source Heat Pump Water Heater Water outlet temperature 70° C,Outdoor ambient temperature(DB/WB° C) Water inlet model temperature(° C) -7/-8 20/15 30/22 35/24 46/28 32.51 40.35 33.35 40.15 Heating Capacity(kW) 32.52 39.47 32.36 39.07 11.34 11.30 11.52 11.63 Heating Power...
  • Page 16 Direct Heating & Circulating Air Source Heat Pump Water Heater Water outlet temperature 55° C,Outdoor ambient temperature(DB/WB° C) Water inlet model temperature(° C) -7/-8 20/15 30/22 35/24 46/28 19.66 28.78 48.28 59.60 67.62 67.26 72.66 19.56 28.67 48.23 59.48 67.56 67.20 72.64 Heating...

  • Page 17: Installation Requirements

    Direct Heating & Circulating Air Source Heat Pump Water Heater Water outlet temperature 70° C,Outdoor ambient temperature(DB/WB° C) Water inlet model temperature(° C) -7/-8 20/15 30/22 35/24 46/28 48.24 59.55 48.13 59.38 Heating Capacity(kW) 48.14 59.34 47.86 59.17 15.87 16.55 16.05 16.63 Heating Power...

  • Page 18: Requirements For Heat Exchange And Maintenance Space

    Direct Heating & Circulating Air Source Heat Pump Water Heater Unit: mm 7.2 Requirements for Heat Exchange and Maintenance Space (1) Installation space for a single unit of RS-Dm30/NaA-M, RS-Dm40/NaA-M or RS-Dm60/NaA-M. Unit: mm...

  • Page 19: Installation Notes

    Direct Heating & Circulating Air Source Heat Pump Water Heater (2) Installation space for modular units of RS-Dm30/NaA-M, RS-Dm40/NaA-M and RS-Dm60/NaA-M. Unit: mm 7.3 Installation Notes Notice: ◆The design and installation of the project must be executed by qualified processional staff in accordance with relative laws and regulations as well as this manual.
  • Page 20 Direct Heating & Circulating Air Source Heat Pump Water Heater maintenance. Make sure there is no obstacle at the air inlet or outlet and the air circulation is smooth. ◆Place that is convenient for connecting pipe and electrical system. (2) Goods reception check: ◆Water heater should be transferred to the possibly nearest location from the installation location before taken out from package.
  • Page 21 Direct Heating & Circulating Air Source Heat Pump Water Heater ◆If the unit should be installsd in a place where is below 0° C or the snow will be accumulated easily for long time operation, the unit must be raised to make it at least 300 mm above the ground and ensure that the condensate water can be discharged smoothly.

  • Page 22: Installation Of Water Flow Switch

    Direct Heating & Circulating Air Source Heat Pump Water Heater ◆If pipes are made of metal such as steel or copper, the unit must be connected with PPR connecting pipes. Then connect units with metal pipes through the PPR connecting pipes. ◆Water pipes should be installed straight and plumb with appropriate pipeline arrangement to avoid possible bending.

  • Page 23: Requirements For Water Tank Installation

    Direct Heating & Circulating Air Source Heat Pump Water Heater installation.Please make sure the rear part forms an arc that matches the pipe and the bottom of the paddle should be 10%-20% above the pipe central line, thus avoiding collision between the paddle and the inner surface of pipes as well as other objects inside.

  • Page 24: Installation Schematic Diagram

    Direct Heating & Circulating Air Source Heat Pump Water Heater Water tank installation refers to the fitting-in between water tank and pipes as well as water level switch. Pay attention to the following points during installation: (1) User intake should be at least 50mm above the cyclic outlet; to avoid possible water lack during unit operation.
  • Page 25 Direct Heating & Circulating Air Source Heat Pump Water Heater...
  • Page 26 Direct Heating & Circulating Air Source Heat Pump Water Heater...
  • Page 27 Direct Heating & Circulating Air Source Heat Pump Water Heater Notice: (1) When the unit is installed below the water tank, the height difference between the water tank and the unit should not be above 8m, and middle transition water tank should be installed when it is above 8m;...

  • Page 28: Installation Of Electrical System

    Direct Heating & Circulating Air Source Heat Pump Water Heater needs to be installed on the water inlet pipelines of the outdoor unit, with good heat insulation as well. The common insulation materials are soft polyethylene foam (PEF), glass wool, and rubber insulation cotton. Thickness of insulation layer shall be ≥30mm. (11) When conducting modular installation, manual valve must be installed on the inlet and outlet of each unit.
  • Page 29 Direct Heating & Circulating Air Source Heat Pump Water Heater (1) External wiring diagram of RS-Dm30/NaA-M, RS-Dm40/NaA-M and RS-Dm60/NaA-M:...
  • Page 30 Direct Heating & Circulating Air Source Heat Pump Water Heater Remarks: the electrode-type water lever switch shall be connected in checkout console with wired controller. Connect checkout console, water flow switch (install on circulating tube), circulating water pump, water supply/back water pump for user, blower pump, temperature sensor of water tank, and temperature sensor of user side to major module, sub-module needs not to be connected.
  • Page 31 Direct Heating & Circulating Air Source Heat Pump Water Heater 12) The unit electrical box contains the control signals of water pump and the auxiliary electrical heater (220-240V AC: capacity of 5A), which can drive AC contactor of the water pump and the auxiliary electrical heater. DO NOT directly drive the water pump motor and the auxiliary electrical heater with the control signal of the water pump and the auxiliary electrical heater on the unit electrical box.

  • Page 32: Controller Installation

    Direct Heating & Circulating Air Source Heat Pump Water Heater (5) Water security issues Please connect PPR separately to the unit direct heat water inlet and cyclic water inlet and outlet, and then connect to external water pipeline. Plastic pipes offered by customers MUST meet the spec.: L ≥...

  • Page 33: Water Heater Main Board Dip Switch Instructions

    Direct Heating & Circulating Air Source Heat Pump Water Heater Water heater controller error code Code Cause Signal source Unit status Reset mode Water tank temperature sensor error Water tank temperature sensor Unit stop Automatic Water pressure switch protection Water pressure switch Unit stop Automatic Insufficient capability...
  • Page 34 Direct Heating & Circulating Air Source Heat Pump Water Heater Look-up table of unit address DIP switch: (lever is black) DIP switch Position Address Remarks When the lever is dialed near to ON, the status is ON, and the opposite direction is OFF.

  • Page 35: Unit Debugging

    Direct Heating & Circulating Air Source Heat Pump Water Heater 11 Unit Debugging 11.1 Check Before Startup To ensure personal and property safety, it’s necessary to check before debugging the unit. The contents and steps should be in accordance with the table below: The following checking items must be completed by experienced and qualified technical maintenance staff Confirm with sales engineer, distributor, installation contractor and customers whether the following items are completed or can be completed.

  • Page 36: Commissioning

    Direct Heating & Circulating Air Source Heat Pump Water Heater Notice: Inform contractor of items with“×”. Above installation items are recommended by Overall unit operation judge or suggestions from commissioning contractor: good □ improvement □ Judge whether there are problems with below items (The unit installation and debug is considered qualified and consistent with regulation requirements when nothing is filled) : a:power and electrical control system problems b:load computation problems Confirmation...
  • Page 37 Direct Heating & Circulating Air Source Heat Pump Water Heater Start the unit Check all necessary conditions for unit startup:oil temperature, mode, load demand and so on. Start the unit, and observe the actions of compressor, electronical expansion valve, electromagnetic valve, fans, water pump and so on.

  • Page 38: Guides For System Discharge Operations

    Direct Heating & Circulating Air Source Heat Pump Water Heater 12 Guides for System Discharge Operations After the completion of the initial unit installation and confirmation of the correct wiring, air discharge must be conducted, because air existing in the system could cause abnormal running of the system.

  • Page 39: Daily Operation And Maintenance

    Direct Heating & Circulating Air Source Heat Pump Water Heater this requirement by one-time directly-heated washing, then it should conduct directly-heated washing for several times), and then conduct circulating washing. Press functional button 2 in menu page to enter into functional settings interface, press left and right buttons to move to “circulating washing”, and then press up button to start up “circulation washing function”.

  • Page 40: Cleaning Of System

    Direct Heating & Circulating Air Source Heat Pump Water Heater 14 Cleaning of System 14.1 Cleaning of Air Side Heat Exchanger For better heat exchanging, usually the water heater air-cooled finned heat exchanger is placed outdoor. Therefore, after a certain period running, fins can’t avoid blocked by dirt, which will affect heat exchanging effect of the condenser and reduce the direct heating effect while increase energy consumption.

  • Page 41: Unit Drainage Operations In Winter

    Direct Heating & Circulating Air Source Heat Pump Water Heater 15 Unit Drainage Operations in Winter In winter when the ambient temperature is below 0° C,DO NOT cut power, or anti-freezing protection of the unit will be out of action. DO drain all the water in tube-in-tube heat exchanger to prevent system damaged by freeze.

  • Page 42: Common Malfunction And Solutions

    Direct Heating & Circulating Air Source Heat Pump Water Heater 16 Common Malfunction and Solutions Notice:If users find problems during operation, please contact the nearest distributor or office. (1) The following phenomena are not malfunctions: 1) When operating in winter, because the heat exchanger surface temperature is below outdoor ambient temperature, and when heat exchanger surface temperature is below 0°...
  • Page 43 Direct Heating & Circulating Air Source Heat Pump Water Heater Phenomena Reasons Solutions Lose or increase some refrigerants. Compressor Refrigerant is too high or low. Water system is blocked or air enters. Check water frequently starts Bad water system circulation. pump, valve, and pipeline.

This manual is also suitable for:

Megalife ml-rs-dm40/naa-mMegalife ml-rs-dm60/naa-m

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