INTERFACE AIR-HANDLING UNIT (AHU) DESIGN GUIDELINE September 2018 Related document: [Model Name] Refer to the following manual PAC-IF013B-E • PAC-IF013B-E/PAC-SIF013B-E INSTALLATION MANUAL • PAC-IF013B-E/PAC-SIF013B-E PAC-SIF013B-E Modbus manual CONTENTS 1. Introduction and Notice ......2 2. Basic Specifications and Connectable Outdoor Unit Models ....... 2 3.
PAC-IF013B-E/PAC-SIF013B-E installation manual, the Modbus manual, and the outdoor unit installation manual for correct use. • This interface is to connect Mr. SLIM inverter outdoor unit of MITSUBISHI ELECTRIC to local applications. Please check the following guidelines when designing the local system.
System Step mode (Input) Target temperature Number of outdoor unit Intelligent multiple outdoor unit control System Manual Not available See (1-1) below. ─ See (2-1) below. Not use See (1-1) below. Auto Supply air temp. control Not available See (1-2) below. Return air temp.
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System (1-2) Auto step mode & Supply air temp. control *3. Auto step mode: • In this mode, the capacity step of the outdoor unit is controlled automatically to let the target temperature reach the set tem- perature. • Set temperature can be set by remote controller, DIP switch, Exhaust Air Return Air or Modbus signal.
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System 3.2 System configuration (Intelligent multiple outdoor unit control *1 ) *1. Interface system receives step request signal correspond to total capacity of outdoor units, and calculates necessary (2-1) Manual step mode (example) capacity for each outdoor unit automatically. Note •...
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Function - System list *1. Example of system configuration System A AHU local Outdoor unit Interface controller Remote controller System B AHU local Outdoor unit Interface controller System C (Manual step mode) (IMOUC) AHU local Ref.address: 0 Outdoor unit Interface controller Ref.address: 1 Outdoor unit...
Input and Output 5.1. Input and output Inputs Availability Outputs Availability Thermistor Ref. liquid temperature (TH2) Output Operation ON/OFF 2-phase temperature (TH5) Error (Refrigerant) (Contact signal) Compressor ON/OFF Thermistor Coil on temperature (TH11) Defrost Target air temperature (TH1) (Air) Cooling mode (Supply air or Return/Room air) Heating mode Input...
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Input and Output 5.2.2 Requirements and guides regarding defrost and pre-defrost signal (1) Do NOT input STEP 0 during defrost operation and while pre-defrost signal is ON. (2) After pre-defrost signal becomes ON, do NOT change capacity step request until defrost operation finishes. If you change capacity step after pre-defrost signal is ON, outdoor unit may stop starting defrosting and frost may become big.
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Input and Output 5.3. Requirements and guides when intelligent multiple outdoor unit control (IMOUC) is used 5.3.1 Power input timing when intelligent multiple outdoor unit control (IMOUC) is used When IMOUC is used, supply power to the first interface unit, then the second interface unit within 1 minute. Otherwise system error will occur. (See figure 5-3.) AHU local AHU local Interface...
Requirement on local AHU design 6.1 Air flow volume Standard air flow volume Model capacity of outdoor unit – – – – – – – – – – – – – – Maximum air volume [m³/min] 12.3 33.6 67.2 [m³/h] 1080 1260 1440...
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Requirement on local AHU design 6.3 Requirement on DX (Direct expansion) coil (1) Heat exchanger volume of DX coil Make sure to keep the DX coil capacity within the following range. If the piping length is 30m or shorter, DX coil capacity can be increased as follows. Model capacity of outdoor unit –...
Requirement on local AHU design 6.5 Thermistor position < Target temp. thermistor (Locally supplied) > Put thermistor where average supply or return air temperature can be detected. Put thermistor where it does NOT pick up the temperature of DX coil. Distributor <...
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This product is designed and intended for use in the residential, commercial and light-industrial environment. HEAD OFFICE: TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN RG79F087H03...