Weil-McLain EcoHP IDU 41 Product Manual
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Weil-McLain EcoHP IDU 41 Product Manual

Weil-McLain EcoHP IDU 41 Product Manual

Split air-to-water heat pump, indoor unit
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41/48/55
Split Air-to-Water Heat Pump
IDU - Indoor Unit Product Manual
• Installation
• Startup
this manual and all other information shipped with the unit, before installing. Perform steps in the order given.
Failure to comply could result in severe personal injury, death or substantial property damage.
Part number 550-100-586/0824

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Summary of Contents for Weil-McLain EcoHP IDU 41

  • Page 1 41/48/55 Split Air-to-Water Heat Pump IDU - Indoor Unit Product Manual • Installation • Startup this manual and all other information shipped with the unit, before installing. Perform steps in the order given. Failure to comply could result in severe personal injury, death or substantial property damage. Part number 550-100-586/0824...

  • Page 2: Table Of Contents

    Split Air-to-Water Heat Pump – IDU Product Manual Split Air-to-Water Heat Pump – IDU Product Manual Contents Section 1 - Safety Precautions ANNEX A: Refrigerant Cycle ... . . 6 .
  • Page 3 Split Air-to-Water Heat Pump – IDU Product Manual CN24 CN28 CN16 CN21 CN13 CN15 CN29 CN18 CN25 CN42 CN40 DIS1 CN31 CN41 CN22 CN35 CN36 Electric Control Box CN17 26 27 14 15 CN11 CN30 COMM PUMP Terminal Block PUMP Plate Heat Exchanger Water Outlet Water Inlet...
  • Page 4 Split Air-to-Water Heat Pump – IDU Product Manual Specifications Outdoor unit Power supply 208/230 V~ 60 Hz Capacity Btu/h 41,283 49,471 54,589 Heating: Outside air temperature: 44.6 ℉ Rated input 2.44 3.09 3.56 Outlet water temperature: 95 ℉ 4.95 4.70 4.50 Capacity 41,965...
  • Page 5 Split Air-to-Water Heat Pump – IDU Product Manual Outdoor Unit 41/48/55 Outdoor fan 4.04 Outside diameter Piping connections Outside diameter 65.5 Installation height difference 65.5 Sound pressure level(at a distance of 39.37") dB(A) 44 x 34 x 20-5/8 Outdoor unit Outdoor unit 。...

  • Page 6: Section 1 - Safety Precautions

    Split Air-to-Water Heat Pump – IDU Product Manual 1 SAFETY PRECAUTIONS The precautions listed here are divided into the following types. They are quite important, so be sure to follow them carefully. Read these instructions carefully before installation. Keep this manual in a secure location for future reference. of various risk levels or to important information concerning the life of the product DANGER indicates a hazardous situation which, if not avoided, will result in death or serious injury.
  • Page 7 Split Air-to-Water Heat Pump – IDU Product Manual Be sure to install a ground fault circuit interrupter according to local laws and regulations. Failure to install a ground fault circuit interrupter may cause electric shocks and fire. Make sure all wiring is secure. Use the specified wires and ensure that terminal connections or wires are protected from water and other adverse external forces.

  • Page 8: Installation

    Split Air-to-Water Heat Pump – IDU Product Manual General This appliance contains A2L flammable refrigerant R32. Installation Every working procedure that affects safety means shall only be carried out by competent personnel. Examples for such working procedures are: – breaking into the refrigerating circuit; –...
  • Page 9 Split Air-to-Water Heat Pump – IDU Product Manual This appliance contains FLAMMABLE REFRIGERANTS, the minimum floor area of the room shall comply with the requirements in the " Required Minimum Room Area" table within this manual; The detailed information on the following topics is included in the manual: -function, operation and required servicing measures;...
  • Page 10 Split Air-to-Water Heat Pump – IDU Product Manual Information on servicing General Servicing shall Be Performed Only By Trained and Certified Service Personnel. Checks to the area Prior to beginning work on systems containing flammable refrigerants, safety checks are necessary to ensure that the risk of ignition is minimized.
  • Page 11 Split Air-to-Water Heat Pump – IDU Product Manual Checks to the refrigerating equipment Where electrical components are being changed, they shall be fit for the purpose and to the correct specification. At all times the manufacturer’s maintenance and service guidelines shall be followed. If in doubt, consult the manufacturer’s technical department for assistance.

  • Page 12: Charging Procedures

    Split Air-to-Water Heat Pump – IDU Product Manual Refrigerant removal and circuit evacuation Oxygen free nitrogen (OFN) shall then be purged through the system both before and during the brazing process. When breaking into the refrigerant circuit to make repairs - or for any other purpose - conventional procedures shall be used. However, for flammable refrigerants it is important that best practice be followed, since flammability is a consideration.
  • Page 13 Split Air-to-Water Heat Pump – IDU Product Manual d) Pump down refrigerant system, if possible. e) If a vacuum is not possible, make a manifold so that refrigerant can be removed from various parts of the system. f) Make sure that the cylinder is situated on the scales before recovery takes place. g) Start the recovery machine and operate in accordance with instructions.
  • Page 14 Split Air-to-Water Heat Pump – IDU Product Manual Do not place appliances (for example an operating gas appliance) which produce open flame in places exposed to the air flow from the unit or under the indoor unit. It may cause incomplete combustion, deformation of the unit due to the heat or even an explosion.
  • Page 15 Installations of an A2L refrigerant (R32) Heat Pump like the ECO HP with other Combustion appliances in the same room / space are not allowed with out specific preventative measures. Weil-McLain boilers that utilize a sealed Cabinet and are vented per their Installation and Service Manuals Direct Vent instructions are permitted, because any leaked refrigerant will not be able to enter the combustion air as well as reach any component that could be considered a potential ignition source.
  • Page 16 Split Air-to-Water Heat Pump – IDU Product Manual Special ventilation opening requirements: ≥ 7/8in #1. A minimum of 50% of the lower Upper Determination of unventilated room area for (height of ventilation opening area must be Ventilation appliances using A2L refrigerants based on unit upper less than 7-7/8”...
  • Page 17 Split Air-to-Water Heat Pump – IDU Product Manual Table 1 - Minimum required Room Area Install height-h0 (in) Refrigerant System line Charge, length (ft) (lbs) Minimum room area, Amin (ft ≤49.2 4.04 No limit No limit No limit No limit No limit No limit No limit No limit No limit No limit No limit 83.9 88.1 94.4...

  • Page 18: Section 3 - Installation Site . . . . . . . . . . . . . . . 18 Controller)

    Split Air-to-Water Heat Pump – IDU Product Manual 2 BEFORE INSTALLATION Before installation Be sure to confirm the model name and the serial number of the unit. 3 INSTALLATION SITE There is flammable refrigerant in the unit and it should be installed in a well-ventilated site. Be sure to adopt adequate measures to prevent the unit from being used as a shelter by small animals.

  • Page 19: Section 4 - Installation Precautions

    Split Air-to-Water Heat Pump – IDU Product Manual 4 INSTALLATION PRECAUTIONS 4.1 Dimensions Dimensions of the wall bracket: 3-1/2 Fig.4-1 unit:in Dimensions of the unit: 16-1/2 Fig.4-2...

  • Page 20: Installation Requirements

    Split Air-to-Water Heat Pump – IDU Product Manual 1-1/2 1-1/2 2-5/8 3-1/2 7/16 2-5/8 2-1/8 unit:in NAME Refrigerant gas connection5/8"-14UNF Refrigerant gas pipe size 5/8"，connection size 7/8"-14UNF Refrigerant liquid pipe size 3/8"，connection size 5/8"- 18UNF Drain 1" Water Inlet 1'' NPT Water Outlet 1'' NPT Wiring hole for 3/4"...

  • Page 21: Recommended Servicing Space

    Split Air-to-Water Heat Pump – IDU Product Manual 4.3 Recommended servicing space ≥12 ≥14 ≥ 20 Fig.4-4 unit:in 4.4 Mounting the indoor unit Fix the wall mounting bracket to the wall using appropriate screws and/or nuts and bolts. Make sure the wall mounting bracket is horizontal level. Pay special attention to prevent overflow of the drain pan.

  • Page 22: Refrigerant Piping Connection

    Split Air-to-Water Heat Pump – IDU Product Manual 4.5 Refrigerant piping connection The pipe-work including piping material, pipe routing, and installation shall include protection from physical damage in operation and service, and be in compliance with national and local codes and standards, such as ASHRAE15，ASHRAE 15.2, IAPMO Uniform Mechanical Code, ICC International Mechanical Code, or CSA B52.

  • Page 23: Section 5 - General Introduction

    Split Air-to-Water Heat Pump – IDU Product Manual 5 GENERAL INTRODUCTION These units are used for both heating and cooling applications and domestic hot water tanks.They can be combined with fan coil units, floor heating applications, low temperature high efficiency radiators, domestic hot water tanks (field supply) and solar kits (field supply). A wired controller is supplied with the unit.

  • Page 24: Section 6 - Accessories

    Split Air-to-Water Heat Pump – IDU Product Manual 6 ACCESSORIES Installation Fittings Shape Name Quantity Indoor Unit Product Manual M16 Copper Nut Tamper Cap M9 Copper Nut Tamper Cap M16 Copper nut M9 Copper nut Tie Wrap 7 OVERVIEW OF THE UNIT 7.1 Disassembling the unit The indoor unit cover can be removed by removing the 2 screws, remove the 4 screws securing the hinged electrical box and open up the electrical box on its hinge.

  • Page 25: Main Components

    Split Air-to-Water Heat Pump – IDU Product Manual 7.2 Main components Code Description Explanation Plate heat exchanger Transfers energy from refrigerant to water. 1" NPT - Water Inlet Water inlet. Refrigerant liquid pipe Drainage port Refrigerant gas pipe 1" NPT - Water Outlet Water outlet.

  • Page 26: Electronic Control Box

    Split Air-to-Water Heat Pump – IDU Product Manual 7.3 Electronic control box CN24 CN28 CN16 CN21 CN13 CN15 CN29 CN18 CN25 CN42 CN40 DIS1 CN31 CN41 PCB of CN22 CN35 indoor unit CN36 CN17 CN11 CN30 COMM PUMP PUMP The picture is only for reference, please refer to the actual product. DIP switch S1、...
  • Page 27 Split Air-to-Water Heat Pump – IDU Product Manual 7.3.1 Main control board of indoor unit CN24 CN21 CN28 CN16 CN32 CN13 CN15 CN29 CN18 CN25 CN42 CN40 DIS1 CN31 CN41 CN22 CN35 CN36 CN17 CN11 CN30 Order Port Code Assembly unit Order Port Code...

  • Page 28: Pump Control Board

    Split Air-to-Water Heat Pump – IDU Product Manual 7.3.2 Pump Control Board Order Port Code Assembly unit Voltage COMM Port for PUMP control board controlled by the main control board of indoor unit 12 V DC PUMP Power for Indoor Unit Pump, VH socket (Reserved) 110-120 V AC PUMP Power for Indoor Unit Pump...

  • Page 29: Fill And Test Water System

    Split Air-to-Water Heat Pump – IDU Product Manual 7.5.1 Water Quality Requirement Clean system to remove sediment 1.The system must be thoroughly flushed (without heat pump connected) to remove sediment. The heat exchanger can be damaged by buildup or corrosion due to sediment. 2.For zoned systems, flush each zone separately through a purge valve.

  • Page 30: Purge Air From Water System

    WM Technologies provides information for application of the antifreeze products listed in this document only for use in Weil-McLain heat pump. Do not apply these products or instructions for other applications. Local codes may require a back flow preventer or actual disconnection from city water supply.
  • Page 31 Split Air-to-Water Heat Pump – IDU Product Manual Test antifreeze concentration at least annually. If concentration is low, add antifreeze or drain system and refill with correct mixture. 6.Follow instructions on antifreeze container to determine the amount of antifreeze needed. DO NOT exceed 50% by volume concentration of antifreeze.

  • Page 32: Filling Water

    Split Air-to-Water Heat Pump – IDU Product Manual 7.5.5 Water circuit anti-freeze protection All internal hydronic parts are insulated to reduce heat loss. Insulation must also be added to the field piping. The software contains special functions using the heat pump to protect the entire system against freezing. When the temperature of the water flow in the system drops to a certain value, the unit will heat the water, either using the heat pump and/or the electric heating tape.

  • Page 33: Field Wiring

    Split Air-to-Water Heat Pump – IDU Product Manual During filling, it might not be possible to remove all air in the system. Remaining air will be removed through the automatic bleed valve during the first operating hours of the system. Topping off the water afterwards might be required. The water pressure indicated on the pressure and temperature gage will vary depending on the water temperature (higher pressure at higher water temperature).

  • Page 34: Field Wiring Guidelines

    Split Air-to-Water Heat Pump – IDU Product Manual 7.7.2 Field wiring guidelines Most field wiring on the unit is to be made on the terminal block inside the switch box. To gain access to the terminal block, remove the switch box service panel. Switch off all power including the unit power supply before removing the switch box service panel.
  • Page 35 7.7.5 Specifications of standard wiring components CN21 CN13 CN15 CN29 CN18 The following is for reference, please refer to Weil-McLain Hybrid Heat Pump Application Guide for typical application diagrams. Equipment main Power Supply Wiring Minimum wire gauge AWG14. P_c P_o P_s P_d AHS1 1OFF...

  • Page 36: Power Cord

    Split Air-to-Water Heat Pump – IDU Product Manual When connecting to the power supply terminal, use the circular wiring terminal with the insulation casing (see Figure 8.1). Use power cord that conforms to the specifications and connect the power cord firmly. To prevent the cord from being pulled out by external force, make sure it is fixed securely.
  • Page 37 CN28 CN16 CN21 CN13 CN15 CN29 CN18 7.7.6 Connection for other components The following is for reference, please refer to Weil-McLain Hybrid Heat Pump Application Guide for typical application diagrams. P_c P_o P_s P_d AHS1 AHS2 1OFF 2OFF IBH1 C1 3ON...

  • Page 38: Room Thermostat

    1) Optional Manual Override: RT can control heating and cooling individually, like the controller for 4-pipe FCU. When the indoor unit is connected with the The following is for reference, please refer to Weil-McLain Hybrid Heat Pump Application Guide for typical application external...
  • Page 39 CN11 CN30 25 26 27 28 1 2 3 4 5 29 30 31 32 6 7 8 9 10 CN11 CN30 The following is for reference, please refer to Weil-McLain Hybrid Heat Pump Application Guide typical FUSE application diagrams.
  • Page 40 Split Air-to-Water Heat Pump – IDU Product Manual 6）DHW control: The on/off switching of the heat pump system for DHW mode is controlled through the EVU ports. When EVU=closed circuit is received, heat pump DHW mode is prioritized, when EVU=open circuit is received, heat pump exits DHW mode. CN24 CN21 CN28...

  • Page 41: Section 8 - Start-Up And Configuration

    8.1 Initial start-up at low outdoor ambient temperature The following is for reference, please refer to Weil-McLain Hybrid Heat Pump Application Guide for typical application diagrams. During initial start-up and when water temperature is low, it is important that the water is heated gradually. Failure to do so may result in concrete floors cracking due to rapid temperature change.

  • Page 42: Water Pressure Drop

    Split Air-to-Water Heat Pump – IDU Product Manual 8.3 Water pressure drop The water pressure drop in the indoor unit is shown below: Indoor unit pressure drop VS Flow rate Flow rate/GPM If the valves are at the incorrect position, the circulation pump will be damaged. If it's necessary to check the running status of the pump when the unit is powered on, please do not touch the internal electronic control box components to avoid electric shock.

  • Page 43: Field Settings

    Split Air-to-Water Heat Pump – IDU Product Manual 8.4 Field settings The unit should be configured to match the installation environment (outdoor climate, installed options, etc.) and user demand. A number of field settings are available. These settings are accessible and programmable through “FOR SERVICEMAN” in user interface.

  • Page 44: Cooling Setting

    Split Air-to-Water Heat Pump – IDU Product Manual 8.4.1 DHW setting 8.4.5 Temp. type setting Select the target item and enter the setting page. In order hide some unavailable functions Temp. type setting parameters, DHW mode needs to be set to NO. Water flow temp.

  • Page 45: Auto Restart

    Split Air-to-Water Heat Pump – IDU Product Manual 8.4.14 Modular system setting Up to two phone numbers can be saved, and the maximum length of the phone numbers is 15 characters. If the length is smaller than 15 character, use 0 in the Modular system setting front to indicate blank characters.

  • Page 46: Operation Settings

    Split Air-to-Water Heat Pump – IDU Product Manual 8.5 Operation Settings Title Code State Default Minimum Maximum Unit interval Enable or disable DHW mode: 0=NO, （1） DHW mode 1=YES setting Enable or disable the cooling Cooling mode mode:0=NO,1=YES The refresh time of climate-related curves t_T4_Fresh_C Hours in cooling mode...
  • Page 47 Split Air-to-Water Heat Pump – IDU Product Manual Title Code State Default Minimum Maximum Unit interval Enable or disable the AHS (Auxiliary （4） AHS function heating source) function: 0=NO, 1=Heating, 2=Heating and DHW Select the pump operating status when AHS_Pump_I （5）...

  • Page 48: Section 9 - Commissioning

    Split Air-to-Water Heat Pump – IDU Product Manual Title Code State Default Minimum Maximum Unit interval HMI address Set the HMI address code for BMS for BMS address Upper computer stop bit: 1=STOP setting Stop BIT BIT1, 2=STOP BIT2 The time for which the compressor has run t_Delay pump Minutes 20.0...

  • Page 49: Air Purge

    Split Air-to-Water Heat Pump – IDU Product Manual What - Actuator List Name Note Three-way valve 2 Three-way valve 3 PUMP_I Integrated circulation pump Additional circulation pump(for Zone 1) PUMP_O Additional heat source Three-way valve 1 Invisible if DHW is disabled Go to “FOR SERVICEMAN”...

  • Page 50: Check Of The Minimum Flow Rate

    Split Air-to-Water Heat Pump – IDU Product Manual In performance test, the target temperature is preset and cannot be changed. If the outdoor temperature is outside the range of operating temperature, the unit may not operate or may not deliver the required capacity.
  • Page 51 Split Air-to-Water Heat Pump – IDU Product Manual 10.2.2 Schedule What Make unit operation plans. This function is based on the current time displayed on the HMI. Make sure the time is correct. Conflicts and operation priority 1) A daily schedule and a weekly schedule can work simultaneously. 2) For all schedules, timers (if more than one) for the same zone or appliance must be different, and the operation mode of Zone 1 and Zone 2 in the same time setting must be the same.

  • Page 52: Operating Parameter

    Split Air-to-Water Heat Pump – IDU Product Manual WLAN setting Custom In case of any change of the WIFI name, the unit will lost WLAN connection and need to be reconnected. Force defrost T1SETH1 Invisible if the unit is running in cooling mode. 10.2.5 Unit status What T1SETH2...

  • Page 53: Section 11 - Trouble Shooting

    Split Air-to-Water Heat Pump – IDU Product Manual 11 TROUBLE SHOOTING This section provides useful information for diagnosing and correcting certain troubles which may occur in the unit. This troubleshooting and related corrective actions may only be carried out by your local technician. 11.1 General guidelines Before starting the troubleshooting procedure, carry out a thorough visual inspection of the unit and look for obvious defects such as loose connections or defective wiring.
  • Page 54 Split Air-to-Water Heat Pump – IDU Product Manual Symptom 3: Pump is making noise (cavitation) POSSIBLE CAUSES CORRECTIVE ACTION There is air in the system. Purge air. • Check on the pressure and temperature gage that there is sufficient water pressure.

  • Page 55: Error Codes

    Split Air-to-Water Heat Pump – IDU Product Manual 11.3 Error codes The following is for reference, please refer to Weil-McLain Hybrid Heat Pump Application Guide for additional service information. When a safety device is activated, an error code will be displayed on the user interface.
  • Page 56 Split Air-to-Water Heat Pump – IDU Product Manual ERROR MALFUNCTION FAILURE CAUSE CODE OR PROTECTION AND CORRECTIVE ACTION 1. The EEPROM parameter is error, rewrite the EEPROM data. 2. EEPROM chip part is broken, change a new EEPROM chip Hydro-box PCB EEPROM fault part.

  • Page 57: Section 12 - Disposal

    Split Air-to-Water Heat Pump – IDU Product Manual ERROR MALFUNCTION FAILURE CAUSE CODE OR PROTECTION AND CORRECTIVE ACTION Three times 'PP' protection The same to "PP". and Tw_out<44.6 °F 1.Check the resistance of the sensor. 2.The Tbt1 sensor connector is loosen, reconnect it. Balance tank temperature 3.The Tbt1 sensor connector is wet or there is water in it, remove sensor (Tbt) fault.

  • Page 58: Annex A: Refrigerant Cycle

    Split Air-to-Water Heat Pump – IDU Product Manual ANNEX ANNEX A: Refrigerant cycle Description Item Water Side Heat Exchanger (Plate Heat Exchanger) Flow switch Refrigerant liquid line temperature sensor Refrigerant gas line temperature sensor Water outlet temperature sensor Water inlet temperature sensor Automatic air purge valve...
  • Page 59 Split Air-to-Water Heat Pump – IDU Product Manual Annex B. Menu structure (wired controller) The following is for reference, please refer to Weil-McLain Hybrid Heat Pump Application Guide for additional information Weekly schedule Menu Mode Schedule 1 Schedule 2 Mode...

  • Page 60: Annex C: Modbus Mapping Table

    Split Air-to-Water Heat Pump – IDU Product Manual For serviceman 7 Other heating source For serviceman 1 DHW setting 7.1 AHS function 1 DHW setting 1.1 DHW mode 7.2 AHS_Pump_I Control 2 Cooling setting 7.3 dT1_AHS_ON 3 Heating setting 7.4 t_AHS_Delay 4 Auto mode setting 2 Cooling setting 7.5 T4_AHS_ON...
  • Page 61 Split Air-to-Water Heat Pump – IDU Product Manual NOTE...
  • Page 62 Split Air-to-Water Heat Pump – IDU Product Manual NOTE...
  • Page 63 Split Air-to-Water Heat Pump – IDU Product Manual NOTE...
  • Page 64 Split Air-to-Water Heat Pump – IDU Product Manual WM Technologies, LLC 500 Blaine Street Michigan City, IN 46360-2388 weil-mclain.com...

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