Panasonic PAW-160MAH3M Installation Instructions Manual
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Panasonic PAW-160MAH3M Installation Instructions Manual

Panasonic PAW-160MAH3M Installation Instructions Manual

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Air Handling Unit Kit
Installation Instructions
PAW-160MAH3M
PAW-280MAH3M
PAW-560MAH3M
PAW-280PAH3M-1
AHU Kit – Installation Instructions – 2023
NX

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Summary of Contents for Panasonic PAW-160MAH3M

  • Page 1 Air Handling Unit Kit Installation Instructions PAW-160MAH3M PAW-280PAH3M-1 PAW-280MAH3M PAW-560MAH3M AHU Kit – Installation Instructions – 2023...
  • Page 2 Notes:...
  • Page 3 The copyright of this Manual remains with the manufacturer. No part of this Manual may be reproduced or processed using electronic systems, or distributed in any form without the written consent of Panasonic Marketing Europe GmbH. Infringements which conflict with the above-mentioned information will render you liable for damages.

  • Page 4: Table Of Contents

    Table of Contents General information and safety notes ..............General information ......................... Safety notes ..........................Instructions for the safe handling of R32 ................1.3.1 Calculating the density limit ..................... 1.3.2 Preventing leakages ......................1.3.3 Detecting leaks ........................ 1.3.4 Repairing leaks ........................ Warranty policy ........................
  • Page 5 Test Run ........................Control ........................Remote controller ........................Enabling 0–10 V demand control by an external BMS ............Trouble diagnosis ....................Common error codes (PACi & ECOi) ..................8.2 Specific error codes for PACi ....................8.3 Specific error codes for ECOi ....................Error codes for outdoor units ....................Special displays on the wired remote controller ..............

  • Page 6: General Information And Safety Notes

    This document contains the installation instructions for the Panasonic AHU Kits. Intended use The intended use of AHU Kits is to connect Panasonic ECOi, ECO G, PACi and PACi NX outdoor units to third-party air handling unit systems, using the same refrigerant circuit as the outdoor unit.
  • Page 7 General information and safety notes Safety-related information Safety-related information, including product safety labels, safety notes and warning messages, warns the user about dangers and provides instructions for the safe and proper use of the product. In this manual, the following layout and symbols are used for warning messages: WARNING This signal word warns of a potentially hazardous situation which can lead to death or severe injury.

  • Page 8: Safety Notes

    General information and safety notes Safety notes To avoid possible harm to persons or damage to products, read and follow these safety notes. WARNING The following precautions need to be followed strictly, in order to avoid hazardous situations, which could result in death or serious injury. Electric shock or fire may result from inadequate or incorrect installation or wiring procedures.

  • Page 9: Instructions For The Safe Handling Of R32

    General information and safety notes Incorrect installation can result in falling equipment causing damage, injuries or other accidents. ► Install in a location that is fully strong enough to support the weight of the equipment. ► Perform installation that is secure enough to withstand earthquakes, tornadoes, storms and other strong winds.

  • Page 10: Calculating The Density Limit

    General information and safety notes WARNING The following precautions need to be followed strictly, in order to avoid hazardous situations, which could result in death or serious injury. A fire or explosion hazard and the generation of poisonous gas may result if R32 refrigerant gas comes into contact with open flames.
  • Page 11 General information and safety notes While there are no floor area limitations for refrigerant charges of less than 1.23 kg, the minimum floor area [A ] for larger refrigerant charge amounts can be calculated by the following formula: ceiling-mounted 2.5 x LFL = minimum floor area (m refrigerant charge (kg) wall-mounted...
  • Page 12 General information and safety notes Density limit diagrams The following diagrams roughly demonstrate the relation between the amount of refrigerant charged for the relevant R32 PACi or PACi NX outdoor units ([m ]) and the required minimum installation space floor area. AHU units For the AHU units, the density limit diagram shows three different “Density Limit Lines”, where each line applies to a different indoor / AHU unit installation height and installation orientation (horizontal/...
  • Page 13 General information and safety notes Line 1 Line 2 Line 3 Line 1 Line 2 Line 3 Line 1 Line 2 Line 3 1.22 12.8 11.7 105.1 21.5 32.1 288.6 14.5 12.4 111.2 22.3 33.2 298.7 16.8 13.1 117.5 23.0 34.4 308.9 19.3...
  • Page 14 General information and safety notes U-200PZH2E8, U-250PZH2E8 45.0 40.0 35.0 30.0 Can be installed 25.0 20.0 15.0 Cannot be installed 10.0 ]: refrigerant charge (kg) of the outdoor unit 1.22 7.80 Elite U-200PZH2E8 U-250PZH2E8 ] (kg) 7.80 PACi NX outdoor units For PACi NX outdoor units, the density limit diagrams show three different “Density Limit Lines”, where each line applies to a different indoor unit installation height as follows: Installation height of indoor unit (h...
  • Page 15 General information and safety notes Line 3 Line 2 Line 1 1.22 1.49 1.22 1.49 ]: refrigerant charge (kg) of the outdoor unit ]: refrigerant charge (kg) of the outdoor unit Standard U-36PZ3E5 U-50PZ3E5 U-60PZ3E5A U-71PZ3E5A ] (kg) 0.95 1.33 1.30 1.49 Calculating example...
  • Page 16 General information and safety notes U-36PZH3E5, U-50PZH3E5, U-60PZH3E5 Refrigerant charge amount, specified in kilogrammes (kg) Maximum refrigerant charge amount, specified in kilogrammes (kg) ] ≤ 1.22 Can be installed 1.22 < [m ] ≤ [m Installation possible above the “Density Limit Line” for the relevant indoor/outdoor unit combina- tion (see diagrams and tables below) ] >...

  • Page 17: Preventing Leakages

    General information and safety notes Elite U-71PZH4E5 U-100PZH4E5 U-125PZH4E5 U-140PZH4E5 U-71PZH4E8 U-100PZH4E8 U-125PZH4E8 U-140PZH4E8 ] (kg) 2.850 5.975 1.3.2 Preventing leakages ● Do not let air enter the refrigeration cycle, because this will increase the risk of explosion and injury due to high pressure inside the refrigerant cycle. ●...
  • Page 18 General information and safety notes switches, check valves, strainers, expansion valves, solenoid valves, 4-way valves, capillary tubes, accumulator tanks, and heat exchanger tubes), nor for any damages and defects caused in the process of installing our AHU Kit, by the system design and/or during assembly of your AHU system.

  • Page 19: Ventilation Theory And Air Handling Units

    Ventilation theory and air handling units Ventilation theory and air handling units Purpose of air-conditioning The purpose of air-conditioning is to provide comfortable indoor air conditions for the room occu- pants and to provide energy saving potentials for the owner. Comfort If room occupants feel “comfortable“...

  • Page 20: Mechanical Ventilation Systems

    Ventilation theory and air handling units Mechanical ventilation systems Main components of mechanical ventilation systems The main components of a mechanical ventilation system are the following: ● Air handling unit (AHU) ● Air ducts ● Air distribution elements Outside air Exhaust air Return air Supply air...
  • Page 21 Connecting AHU systems via the AHU Kit to ECOi/ECO G or PACi outdoor units The following graphic shows an example for connecting a third-party air handling unit via the Pana- sonic AHU Kit to Panasonic ECOi/ECO G or PACi outdoor units. AHU Kit – Installation Instructions – 07/2023...
  • Page 22 Ventilation theory and air handling units Air handling unit control by external 0–10 V signal Air Handling Unit Kit External control system 0–10 V control signal PACi or ECOi/ECO G outdoor unit Air Handling Unit 1 This schematic layout shows an example for the MAH3/PAH3 AHU Kit generation, which feature an in-built CZ-CAPBC2 interface handling the 0–10 V control.

  • Page 23: Product Description

    Product description General description The Panasonic AHU Kits offer a wealth of connectivity possibilities so that they can be easily inte- grated into many systems. The AHU Kits are part of an on-going development process aiming at constant improvement of the product to better meet customer demand.
  • Page 24 PAW-280PAH3M-1 PAW-560MAH3M IP65 case Control unit including transformer Relays Terminal boards Remote controller (CZ-RTC6BL) Compatibility with Panasonic H&C Control App Compatibility with Panasonic H&C Diagnosis App – – Expansion valve – PCBs for the expansion and RAP / SVK valves –...
  • Page 25 Product description PAW-280PAH3M-1 Remote controller (CZ-RTC6BL) CZ-CAPBC2 interface Main PCB Fan relay Terminal board PACi and PACi NX accessories Thermistor x2 Thermistor (Refrigerant: E1, E2) (Air: TA) Control functions provided as standard by integral components CZ-RTC6BL remote controller ● Operation-ON/OFF ●...
  • Page 26 Product description PAW-OCT, DC12 V outlet, OPTION terminal ● Output signal for Cooling/Heating/Fan status > Terminal OP4; OP5; OP6; Potential OP1. ● Output signal for Defrost operation indication > Terminal OP2; Potential OP1. ● Output signal for Thermostat-ON status > Terminal OP3; Potential OP1 Additional contacts available ●...
  • Page 27 Product description Mounting boards MAH3 Mounting board 1 Remote controller (CZ-RTC6BL) 2 CZ-CAPBC2 interface (PCB name: ACC-SP1A) 3 Single motorised valve PCB (PCB name: PAN.MOVG1) 4 Main control board (PCB name: PAN.UXRP71B-P) 5 Fan relay 6 RAP valve control PCB (PCB name: A2 PAN.SV80x) 7 Terminal board PAH3M-1 Mounting board...

  • Page 28: System Lineup

    560MAH3M 1 PAW-160MAH3M: ● PAW-160MAH3M can be installed in combination with all ECOi outdoor units (including Mini ECOi (2-pipe), ECOi 2-pipe and ECOi 3-pipe units) like any other standard indoor unit. ● Mixed installation with standard indoor units is possible with all ECOi outdoor units (as above). However, in this case one additional RAP valve (CZ-P160RVK2) must be installed in the unit connection pipe, un- less the complete system is exclusively used in cooling only operation.
  • Page 29 ECO G 2-way outdoor units PAW-560MAH3M 1 PAW-160MAH3M: ● Like any other standard indoor unit, PAW-160MAH3M can be installed in combination with all ECO G outdoor units. ● Mixed installation with standard indoor units is possible. However, in this case one additional RAP valve (CZ-P160RVK2) must be installed in the unit connection pipe, unless the complete system is exclusively used in cooling only operation or in a 3-way system with heat recovery box.

  • Page 30: System Overview

    Product description System Overview System Overview – ECOi systems Single-connection system AHU Kit enclosure (complete) Thermistor for liquid pipe AHU system (field supplied) Thermistor for gas pipe Remote controller (integrated in AHU Kit enclosure) Thermistor for suction air Outdoor unit Thermistor for discharge air Liquid piping (field supplied) Inter-unit wiring...
  • Page 31 Product description Multi-connection system Note: The following restrictions apply only if PAW-560MAH3M is used alone or in combination with other AHU Kits. For all other AHU Kit combinations without PAW-560MAH3M no such restrictions apply. 1 All AHU heat exchangers belonging to the same refrigerant circuit have to be installed in the same chassis equipped with one single fan motor.
  • Page 32 1 Single-connection system shown here as an example. 2 Multi-connection systems are possible in combination with PAW-160MAH3M or PAW-280MAH3M. In case of multi- connections with PAW-560MAH3M further restrictions will apply. For details, please contact your local Panasonic service partner.

  • Page 33: Technical Data

    Product description System example for PACi and PACi NX single-connection system PAW-280PAH3M-1 Outdoor unit / Wiring for indoor unit wiring temperature sensors PACi NX outdoor unit Piping Air Handling Unit Technical data Technical data – AHU Kit MAH3 / PAH3 generation Power source V / ph / Hz 220 ...
  • Page 34 Technical data and limitations – ECOi and ECO G systems – R410A AHU Kit HP 30¹ 40¹ AHU Kit model PAW-160MAH3M PAW-280MAH3M PAW-560MAH3M PAW-280MAH3M + PAW-560MAH3M + PAW-560MAH3M PAW-560MAH3M Nominal cooling capacity 14.0 28.0 56.0...
  • Page 35 AND an ambient air temperature limit above which it may not be possible to pump down the complete refrigerant charge (including all additional refrigerant) into the outdoor unit. Note: The AHU DX coil must be designed according to Panasonic specification. Calculation example for total additional refrigerant charge (R32)
  • Page 36 Product description Calculation example for number of passes in the heat exchanger The minimum number of passes in the AHU heat exchanger is restricted. The limit is calculated by the formula: Minimum number of passes = Number of steps × Distance between tube sheets × Number of rows × 1.5 × 10 –4 The calculated value must then be rounded up to the next integer number.
  • Page 37 AND an ambient air temperature limit above which it may not be possible to pump down the complete refrigerant charge (including all additional refrigerant) into the outdoor unit. Note: The AHU DX coil must be designed according to Panasonic specification. Calculation example for total additional refrigerant charge (R32)
  • Page 38 Product description Refrigerant charge at shipment fitted for pipe length within 30 m Pipes additional refrigerant charge: 0.03 kg/m AHU DX coil additional refrigerant charge: 0.83 kg/dm³ Refrigerant charge at shipment is sufficient for AHU DX coil volume up to 1.8 dm³ Total additional refrigerant charge calculation ((2.1 dm³...

  • Page 39: Installation

    Installation Installation Installation of AHU Kit WARNING Electric shock from live power supply cords Electric shock may result from contact with live power supply cords. ► Wiring installation must only be performed by a qualified electrician. ► Before starting to work on any machines or devices, always switch off the power supply and lock it in switched-off position.
  • Page 40 Installation 3. Open the front-side door of the enclosure as shown below (left), and mount the backside of the enclosure to the wall or surface using field-supplied fixing screws inserted through the previously prepared holes at each corner as shown below (right). 4.

  • Page 41: Installation Of Refrigerant Piping

    Installation 4.1.2 Installation of refrigerant piping When installing the refrigerant piping, the following limitations and restrictions need to be observed: ● Maximum actual and equivalent piping length ● Maximum branch pipe length to AHU Kit ● Maximum branch pipe length difference (between longest and shortest piping from the first branch) ●...

  • Page 42: Installation Of Thermistors

    Installation ● Vertical inclination of expansion valve must be less than ±15°. Expansion valve (MOV) Pipe to the outdoor unit Pipe to the AHU heat exchanger ● The coil wire must be inserted drooped in the AHU body with the drooping wire being close to the AHU Kit.

  • Page 43: Installation Of Thermistor On Gas Pipe

    Mount “E3” thermistor to the gas pipe of the AHU heat exchanger according to the following instructions. For PAW-160MAH3M 1. Attach the gas pipe thermistor onto the collecting gas pipe in the heat exchanger. 2. Cover the thermistor and pipe with aluminum tape.

  • Page 44: Installation Of Thermistor On Liquid Pipe

    Installation 3. Cover the aluminum tape with thermal insulation. 4. Fix thermal insulation and wiring with two bands. Then, run the wire downwards in a loop, to avoid putting tension to it. For PAW-280MAH3M and PAW-560MAH3M 1. Upon delivery, for PAW-280MAH3M and PAW-560MAH3M there is a sensor sleeve soldered to the gas pipe after the expansion valve: Insert the sensor together with some heat sink paste into the sensor sleeve.

  • Page 45: Installation Of Thermistor On Heat Exchanger Pipe Middle

    Installation 4.3.3 Installation of thermistor on heat exchanger pipe middle Installation of thermistor on heat exchanger pipe middle – PACi and PACi NX systems Mount “E2” thermistor to the heat exchanger pipe middle according to the following instructions. 1. Attach the heat exchanger pipe middle thermistor in the middle of each pass-line (pipe) in the heat exchanger.

  • Page 46: Matching Outdoor Unit Capacity With Ahu Kit Capacity

    Installation Matching outdoor unit capacity with AHU Kit capacity Matching outdoor unit capacity with AHU Kit capacity – PACi and PACi NX systems As the AHU Kit model PAW-280PAH3M-1 has only one fixed capacity and can be combined with the complete range of PACi and PACi NX systems, where outdoor unit capacities vary from 2.5 (PACi NX range) to 25 kW (PACi range), it is necessary to change the settings so that the de- fault capacity check of the PACi or PACi NX outdoor unit is ignored or the outdoor unit capacity is matched with the AHU Kit capacity.
  • Page 47 Method B: Changing outdoor unit setting to ignore capacity Another possibility is to change the outdoor unit settings by using a separate standard wired remote controller, CZ-RTC2 or CZ-RTC4, which can be obtained from Panasonic as optional service parts. Important Method B is only applicable to the following combinations of PACi outdoor units and AHU Kits: ●...
  • Page 48 Installation Method C: Adapting AHU capacity to PACi outdoor unit capacity The third possibility is to adapt the AHU Kit capacity to match the capacity of the currently used PACi or PACi NX outdoor unit. Important Method C is applicable to the following combinations of PACi outdoor units and AHU Kits: ●...
  • Page 49 Installation 4. On the “Detailed settings” screen, the “Unit No.” option will be highlighted. Note: If auto-addressing has been completed before, the relevant unit number will be displayed, or if not, “All” will be displayed instead. With the “UP” and “DOWN” buttons, change the value to the unit number of the relevant system, and press the “ENTER”...
  • Page 50 Installation 7. Once the setting procedure is completed, exit the “Detailed settings” mode by pressing the “MENU” button several times. This will invoke a confirmation message (see below). Select “YES” with the “UP” and “DOWN” buttons, and then press the “ENTER” button to finish the “Detailed settings”...
  • Page 51 Installation 3. On the “Maintenance func” screen, scroll through the menu items with the “UP” and “DOWN” buttons, and select “Detailed settings” by pressing the “ENTER” button when it is highligted in the list. Maintenance func XX / XX Simple settings Detailed settings Auto address 4.
  • Page 52 Installation 7. Once the setting procedure is completed, exit the “Detailed settings” mode by pressing the “MENU” button several times. This will invoke a confirmation message (see below). Select “YES” with the “UP” and “DOWN” buttons, and then press the “ENTER” button to finish the “Detailed settings”...

  • Page 53: Electrical Wiring

    Electrical Wiring Electrical Wiring General precautions on wiring WARNING Electric shock from live power supply cords Electric shock may result from contact with live power supply cords. ► Wiring installation must only be performed by a qualified electrician. ► Before starting to work on any machines or devices, always switch off the power supply and lock it in switched-off position.
  • Page 54 Electrical Wiring Stranded wire 1. Cut the wire end with cutting pliers, then strip the insulation to expose the stranded wiring about 10 mm and tightly twist the wire ends. Wire-end sleeve 2. Using a flat-blade screwdriver, loosen the terminal screw(s) on the terminal plate. 3.

  • Page 55: Terminal Board Layout

    Electrical Wiring Terminal board layout 5.3.1 MAH3 models Terminal layout – Main terminal board (PAN.UXRP71B-P) Allocation Function Description Terminal No. X1.1 Live Live Terminal External Potential: 230 V AC, max. 1 A X1.2 Neutral Neutral Terminal X1.4 Protective earth Protective Earth Conductor Allocation Function Description...
  • Page 56 Electrical Wiring Allocation Function Description Terminal No. X4.1 No polarity Suction Temperature Sensor TA input (included) Air temperature sensor (Room Temperature Sensor) X4.2 No polarity E1.1 X4.3 No polarity Sensor E1 / TH2 input Refrigerant temperature sensor (included) E1.2 X4.4 No polarity E3.1 X4.5...
  • Page 57 Electrical Wiring Allocation Function Description Terminal No. X6.1 4 – 20 mA Higher potential Analog output (Room temperature monitor), Indoor temperature Analogue output terminals monitor output. Output current : 4 to 20 mA. Temperature indica- tion range : 5 to 36 °C, 0.5 °C step X6.2 4 –...
  • Page 58 Electrical Wiring Terminal layout – CZ-CAPBC2 / ACC-SP1A CZ-CAPBC2 interface, terminal block CN1 Connections Polarity Name Allocation Function Description By factory default connected 12 V power supply (12V) – By factory default connected By factory default connected (Start) (12V) Remote control line A LINE A By factory default connected Not used...
  • Page 59 Electrical Wiring CZ-CAPBC2 digital input functionality The CZ-CAPBC2 digital inputs offer the following functionality settings. Switch S1: Control type setting VOLTAGE NON VOLTAGE Control Control 0-140Ω type type 0-10V – – – – – – – ● ● – – –...

  • Page 60: Pah3 Model

    Electrical Wiring Switch S3: Digital input configuration setting (voltage/non-voltage signals) Depending on the BMS digital input (DI) configuration, switch S3 on the CZ-CAPBC2 interface can be set for the digital input terminals to accept either non-voltage signals from dry contacts (factory default: “NON VOLTAGE”) or 12 –...
  • Page 61 Electrical Wiring Allocation Function Description Terminal No. X4.1 No polarity Suction Temperature Sensor TA input (included) Air temperature sensor (Room Temperature Sensor) X4.2 No polarity E1.1 X4.3 No polarity Sensor E1 / TH2 Refrigerant temperature sensor E1.2 X4.4 No polarity E2.1 X4.5 No polarity...
  • Page 62 Electrical Wiring Allocation Function Description Terminal No. X6.1 4 – 20 mA Higher potential Analog output (Room temperature monitor), Indoor temperature Analogue output terminals monitor output. Output current : 4 to 20 mA. Temperature indica- tion range : 5 to 36 °C, 0.5 °C step X6.2 4 –...

  • Page 63: Wiring Layout

    Electrical Wiring Wiring layout Wiring layout – MAH3 models PAW-160MAH3M / PAW-280MAH3M / PAW-560MAH3M for T/D-2 T/D-1 E3.2 E3.1 E1.2 E1.1 T10.2 T10.1 AHU Kit – Installation Instructions – 07/2023...
  • Page 64 Electrical Wiring Wiring layout – PAH3 model PAW-280PAH3M-1 for for T/D-2 T/D-1 E2.2 E2.1 E1.2 E1.1 T10.2 T10.1 Remove bridge to connect flow switch AHU Kit – Installation Instructions – 07/2023...

  • Page 65: Wiring System Diagrams

    Electrical Wiring Wiring system diagrams Important ● The letter coding (A to F) used in this section refers only to the wiring system diagrams in this section. ● For information on “(A) Power supply of outdoor unit” refer to the “Installation Instructions“...
  • Page 66 Electrical Wiring For three-phase outdoor units – Multi-system connection AHU kit (No. 1) Power supply 220 – 240V ~50/60Hz Outdoor unit Power supply Ground INV unit 380 – 415V, 3 N~, 50Hz Remote controller Ground Ground Ground AHU kit (No. 2) Ground Power supply 220 –...
  • Page 67 Electrical Wiring Wiring system diagram – ECO G systems 220 – 240V ~50Hz Earth leakage AHU kit circuit breaker Power supply 220 – 240V ~50/60Hz Ground Outdoor Remote controller Unit Ground Ground Recommended wire lengths and diameters AHU Kit Type (B) Power supply Time delay fuse or circuit breaker PAW-160/280/560MAH3M...
  • Page 68 Electrical Wiring Recommended wire lengths and diameters AHU Kit Type (B) Power supply Circuit breaker PAW-280PAH3M-1 Min. 0.75 mm Max. 25 m Control wiring (C) Inter-unit control wiring (D) Remote control wiring (E) Control wiring for group (between outdoor unit and AHU Kit) control Min.
  • Page 69 Electrical Wiring For three-phase outdoor units – Single-system connection AHU Kit Outdoor unit Power supply 380 – 415V ~50Hz Ground Remote controller Central control system (optional) For three-phase outdoor units – Multi-system connection AHU Kit Outdoor unit Power supply 380 – 415V ~50Hz Ground Remote controller...
  • Page 70 Electrical Wiring Recommended wire lengths and diameters AHU Kit Type (F / G) Connection cable between outdoor and AHU Kit (F) Outdoor units: (G) Outdoor units: (G) Outdoor units: U-36/50PZ3E5, U-100/125/140PZ3E5, U-71/100/125/140PZH4E5, U-60/71PZ3E5A, U-100/125/140PZ3E8 U-71/100/125/140PZH4E8 U-36/50/60PZH3E5 PAW-280PAH3M-1 Min. 1.5 mm² (1) Min.
  • Page 71 Electrical Wiring 5. Use shielded wires for inter-unit control wiring (C) to ECOi, ECO G and PACi PZ2/ PZH2 systems and also to centralised controllers in case of PACi NX systems, with shielded woven mesh grounded on both sides, otherwise misoperation from noise may occur.
  • Page 72 Electrical Wiring ● In case that the inter-unit control wiring in the link has both 3-line and 2-line connections: > Set the terminating resistance with the TERMINAL pin (CN-TERMINAL) on the outdoor unit control PCB (note, that the outdoor unit is connected by 2-line connection).

  • Page 73: Connection Of External Signal Lines

    Electrical Wiring 11. In case of a multiple AHU Kit combination within one refrigerant system, those kits must share the same AHU housing including fan, and they have to be “group-wired” and operate as a single group. In this case you must only have one remote controller and one CZ-CAPBC2 board (ACC-SP1A PCB) connected in one AHU kit.
  • Page 74 Electrical Wiring For MAH3 generation models ● Blower signal output: terminals F1 (X2.1) and F2 (X2.2), max. 5 A / 250 VAC Blower protection input: terminals OP3 (X2.3) and K2 (X2.4). Detail view OP3 K2 Blower signal output Blower protection ●...
  • Page 75 Electrical Wiring For all models ● The external signal lines must be inserted drooped in the AHU body and protected by a clamp with the drooping wire being close to the AHU Kit to avoid water reaching the AHU Kit. Inside of AHU AHU Kit Blower signal and...
  • Page 76 Electrical Wiring Electric circuit example – ECOi systems Multi-connection systems with 3 AHU Kits Field-supplied AHU Kit Blower signal output AHU Kit Blower signal Blower output signal AHU Kit Blower signal output Electric circuit example – PACi systems Single-connection system Field-supplied AHU Kit Blower signal...
  • Page 77 Electrical Wiring MAH3 generation models For PAW-160/280/560MAH3M, there are several possibilities for making a connection between the AHU system and an external building management system. You can either use the terminal contacts T10.1 and T10.2 on the main PCB, or you may purchase the PAW-T10 PCB as a field-supplied optional part and connect it as per the following diagram, which shows just one wiring example of several possibilities.
  • Page 78 Electrical Wiring Electric circuit example including a timer and air flow switch AHU Kit External control system PACi or ECOi/ECO G outdoor unit Air Handling Unit (AHU) Air flow switch Timer 56b1 AHU Kit – Installation Instructions – 07/2023...

  • Page 79: Test Run

    Test Run Test Run After installation and before operation of the system, perform a test run according to the Test Run section in the Installation Instructions of the relevant outdoor unit. If alarm messages are indicated on the outdoor unit PCB (by blinking LEDs) or on the wired remote controller, refer to the Alarm Messages section in the Installation Instructions for the relevant out- door unit.

  • Page 80: Control

    Control Remote controller The standard Panasonic wired remote controller CZ-RTC6BL is an integral part of the AHU Kit. All control and setting operations for the ECOi, ECO G, PACi NX or PACi system can be performed on this remote controller.
  • Page 81 Control b. On Section X6 of the main PCB (see diagram below), connect the digital inputs (DI) as follows: ● Heating start to COM and DI1 ● Cooling start to COM and DI2 ● Fan mode (free cooling) start to COM and DI3 ●...
  • Page 82 Control 6. Via the signal wiring from the external BMS, select the 0–10 V demand control functionality as follows: Input Demand (% of Indoor unit Input Demand (% of Indoor unit Input Demand (% of Indoor unit Voltage* (V) nominal current) start / stop Voltage* (V) nominal current)

  • Page 83: Trouble Diagnosis

    Trouble diagnosis Trouble diagnosis Common error codes (PACi & ECOi) Remote Description Detailed Explanation Controller Display Central Controller Indoor unit does not respond to central control equipment. Reception Error Remote Controller It is judged an error if no self-addressed communication is sent to the remote controller in a Reception Error 3-minute period.
  • Page 84 Trouble diagnosis Remote Description Detailed Explanation Controller Display Auto address setting It is judged an error when the total capacity of indoor units is too high or the total number of indoor alarm (too many units) units is too many. •...

  • Page 85: Specific Error Codes For Paci

    The operation capacity of the outdoor unit is restricted. Units are operated at the capacity set by schedule.* * Can only be set using the “Panasonic H&C Control App” The display of “operation capacity of the outdoor unit is restricted” is typically shown while the 0 –...

  • Page 86: Error Codes On A4 Pcb (Acc-Sp1A)

    Trouble diagnosis Error codes on A4 PCB (ACC-SP1A) Green LED display Meaning Action to take Power Off Check the remote control line connection (A4 PCB CN1 terminals 12 & 13 to A1 PCB CN041 blue) Blinking at 3 s intervals 12VDC Check the power supply line connection (A4 PCB CN1 terminals (T10 terminal)

  • Page 87: Parameter Settings

    AHU Kit capacity – Method C – steps 1 to 3, p. 48 Bluetooth connection with CZ-RTC6BL, see the manual of the “Panasonic H&C Control App” or the service manual of PACi NX outdoor units, chapter 6.
  • Page 88 Parameter settings Code No. Item Data Description System address (= address of outdoor unit) 0001 … 0030 Outdoor unit address 1 … 30 0099 Not set Indoor unit address 0001 … 0064 Indoor unit address 1 … 64 0099 Not set Group control address 0000 Individual (1:1 = AHU with no group wiring)
  • Page 89 Parameter settings Code No. Item Data Description “T10” terminal switching for terminal contacts 0000 In case of pulse signal (JP001 on AHU main PCB A1 closed) T10.1 & T10.2 for each pulse signal change from current operation ON to OFF respectively from current OFF to ON state In case of static signal (JP001 on AHU main PCB A1 open) NC = operation ON, NO = operation OFF...
  • Page 90 Parameter settings Notes: AHU Kit – Installation Instructions – 07/2023...
  • Page 91 Notes:...
  • Page 92 www.aircon.panasonic.eu...

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