Daikin AHF Installation & Maintenance Manual
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Daikin AHF Installation & Maintenance Manual

Daikin AHF Installation & Maintenance Manual

Classroom unit ventilator
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CLASSROOM
UNIT VENTILATOR
• MODELS AHF, AHB, AHV, AHR
• SIZES 07 - 20 (750 TO 2000 CFM)
• R-32 REFRIGERANT
©2025 DAIKIN APPLIED | (800) 432.1342
INSTALLATION & MAINTENANCE MANUAL
LEARN MORE AT DAIKINAPPLIED.COM
IM 1399
APRIL 2025

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  • Page 1 INSTALLATION & MAINTENANCE MANUAL IM 1399 APRIL 2025 CLASSROOM UNIT VENTILATOR • MODELS AHF, AHB, AHV, AHR • SIZES 07 - 20 (750 TO 2000 CFM) • R-32 REFRIGERANT LEARN MORE AT DAIKINAPPLIED.COM ©2025 DAIKIN APPLIED | (800) 432.1342...

  • Page 2: Table Of Contents

    Electrical Heating Data . . . . . . . . . . . . . . . . . . . . . . . 45 ©2025 Daikin Applied, Minneapolis, MN. All rights reserved throughout the world. This document contains the most current product information as of this printing.

  • Page 3: Safety Information

    Polyolester Oil, commonly known as POE oil is a synthetic oil used in many only by personnel that are knowledgeable in the operation of the equipment refrigeration systems, and may be present in this Daikin Applied product. POE being controlled.

  • Page 4: Ul Compliance Statements For Unit Work

    A degree of ventilation shall continue during the period that the work is carried out. The ventilation should safely disperse any released refrigerant and preferably expel it externally into the atmosphere. DAIKIN APPLIED CLASSROOM UNIT VENTILATOR...

  • Page 5: Introduction

    INTRODUCTION Introduction Model Nomenclature Code Category Code Item Code Designation & Description Option Product Category Unit Ventilators Ceiling, Face & Bypass with Reheat Ceiling, Valve Control with Reheat Model Type Ceiling, Face & Bypass Ceiling, Valve Control Design J Design Series Design K (for Units with R-32 Refrigerant Coil) High Static 750 cfm EC Motor, Variable Airflow 750 cfm...
  • Page 6 Box w/Switch Box w/Switch, w/USB Power Connection Box w/Switch, w/SD Box w/Switch, w/USB, w/SD Color Off White SKU Type Standard Delivery 1st Style Change (No DX Coil) Product Style R-410 Coil (Service Replacement) R-32 Refrigerant DAIKIN APPLIED CLASSROOM UNIT VENTILATOR...

  • Page 7: Installation

    (5) days of the delivery date and file a claim with the form provided by Daikin Applied. Refer to the Daikin Applied Freight Policy for further information.

  • Page 8: Lifting The Unit Into Position

    5-Row Coil 1.03 (3.90) 1.34 (5.07) 1.64 (6.21) 1.95 (7.38) 1.95 (7.38) NOTE: *Approximate weights based on Face and Bypass Damper Controlled Unit with 4- row cooling coil, high capacity hot water coil and MicroTech controls. DAIKIN APPLIED CLASSROOM UNIT VENTILATOR...

  • Page 9: Unit Location

    INSTALLATION Unit Location Figure 4: Typical Ceiling Installation (Soffit) (Plumbing Not Shown) Figure 5: Fully Recessed Unit NOTICE The ceiling unit must be installed at least 5.9 ft (1.8 m) above the ground. Ceiling Suspended Cross Tees Main Tees Independent of Unit Wall Openings, Louvers, and VentiMatic™...

  • Page 10: Ventimatic™ Shutter Assembly

    Bottom View of End Compartments Screws (Typical 4) Bracket Figure 7: Ceiling Unit Arrangements VentiMatic™ Shutter Assembly In many installations, a Daikin Applied VentiMatic Shutter Assembly is specified. See Figure 9. This one-way shutter is a continuously variable, gravity actuated, room exhaust vent that operates in direct response to positive static pressure.

  • Page 11: Installing Louvers

    INSTALLATION Installing Louvers Louver Details Figure 10: Horizontal and Vertical Blade Louvers, Without Flange (See Caution Below for Louver Blade Orientation and Drainage) Bird Screen On Side Toward Unit Outside Air Bottom Outside Air Horizontal Blade Louver Vertical Blade Louver Figure 11: Horizontal and Vertical Blade Louvers, Without Flanges with Grille or with Flange Without Grille Vertical Louver with Flange, Without Grille Flange...

  • Page 12: Typical Installation Methods

    DAIKIN APPLIED CLASSROOM UNIT VENTILATOR...

  • Page 13: Installing The Ventimatic Shutter Assembly

    INSTALLATION If the louver is supplied with flanges, (Figure 16) place an Figure 16: Vertical or Horizontal Blade Wall Intake Louver additional bead of caulk on the inside of the top and side flanges (Flanged) (Vertical Blade Shown) that come in contact with the building facade. Do not caulk the bottom flange.
  • Page 14 ⁄ ″ Outside (105mm) Steel VentiMatic Shutter Assembly ⁄ ″ (264 mm) ⁄ ″ (606 mm) ⁄ ″ (911 mm) 2″ (51 mm) Decorative Exterior Grille also Available (See Note 2) (Bird Screen Not Shown) DAIKIN APPLIED CLASSROOM UNIT VENTILATOR...

  • Page 15: Typical Discharge Air Arrangements

    2. Duct collars shipped loose for field installation not by Daikin Applied. 3. It is important also to verify there is sufficient clearance to open and remove the bottom access panels and end panels for routine maintenance.

  • Page 16: Intake Air Arrangements

    Figure 27: Arrangement 26 Return Air Bottom Grille/Outdoor Room Air/Outside Air Dampers) Air Top Duct Collar 4½″ (114 mm) x A Outdoor Air 3/4″ (19 mm) 1″ (25 mm) Outdoor Return Air Return Air Return Air Return Air DAIKIN APPLIED CLASSROOM UNIT VENTILATOR...

  • Page 17: Intake Air Knockouts

    3/4″ (19 mm) NOTE 2: Duct collars shipped loose for field installation not by 1¼″ (32 mm) Daikin Applied. Outdoor Air Outdoor Air 4½″(114 mm) x A NOTE 3: It is important also to verify there is sufficient clearance to open and remove the bottom access 4″...

  • Page 18: Vertical Outdoor Air (Top) Intake Duct Collar Installation

    Collar Angle with Provided #8 Sheet Metal Screws. #8 x 1-1/4″ Screws Locate Within Slots on the Bottom Duct Collar Angle. Holes Provided. Number of Screws Vary by Unit Size. Attach Angles to Unit at Holes Nearest to the Edge. DAIKIN APPLIED CLASSROOM UNIT VENTILATOR...

  • Page 19: Horizontal Room Air (Lower) Intake And Horizontal Outdoor Air (Upper) Intake Duct Collars Installation

    INSTALLATION Horizontal Room Air (Lower) Intake Duct Collar Installation Remove the lower knockout panel using a hammer and flat screw driver or punch. Install the duct flange as shown in Figure 34 . Figure 34: Horizontal Room Air (Lower) Intake Duct Collar Details Horizontal Room Air (Lower) Intake Unit Ventilator Discharge...

  • Page 20: Duct System Considerations

    Figure 38: Outdoor Air Intake and Insulated Duct Work suggested installation of outdoor air ducting. Unit Ventilator Intake 5 Feet Same Size as Unit Discharge Louver Outdoor Flexible Boot Acoustically Lined Insulated Ductwork to Prevent Sweating, Heat Loss or Heat Gain DAIKIN APPLIED CLASSROOM UNIT VENTILATOR...

  • Page 21: Anchoring The Ceiling Unit Ventilator

    INSTALLATION Figure 39: Outdoor Air Arrangement with Prevailing Winds It is the responsibility of the installer to provide mounting hardware in accordance with local codes. CAUTION Rear Outdoor Air Duct Ensure that the unit is properly level and not twisted. Use the unit mounting holes.

  • Page 22: Make Piping Connections

    While brazing, have an extinguisher readily available. Wear appropriate eye and hand protection. Ensure all areas with shared ventilation have ample fresh air ventilation. Proper ventilation is required for brazing. When brazing, use DAIKIN APPLIED CLASSROOM UNIT VENTILATOR...

  • Page 23: Suggested Condensate Trapping

    Drain Plug Brazing Suggested Condensate Trapping Daikin Applied cooling unit ventilators are designed for condensate removal into a condensate disposal system. Do not connect the unit drain connection so that condensate exits to the outside and/or is exposed to freezing temperatures. The...

  • Page 24: Coil Connection Locations

    ⅞″ I.D. Clear Plastic Table 4: Condensate Drain Static Pressures High Static 1½″ 3/4″ 3⅛″ Figure 47: Condensate Drain Viewed From Bottom of Unit with Hinged Access Door Open Figure 49: Steam Heating Only Unit (Coils 68, 69) DAIKIN APPLIED CLASSROOM UNIT VENTILATOR...

  • Page 25: Cooling Only

    4. Steam/hot water connections may be same end as cooling coil connections, but they are recommended to be opposite end to Face and Valve facilitate piping. (Must be opposite end when using Daikin Applied Bypass First Position in Air Second Position controls.)
  • Page 26 (267 mm) from right end of the unit. Figure 53: Chilled/Hot Water (2-pipe) Unit (Coils U[1], D[2], 7. All dimensions are approximated. E[3], F[4]) Figure 55: Chilled Water & Steam Unit (Cooling Coils V[5], S[6]; Heating Coils 68, 69) DAIKIN APPLIED CLASSROOM UNIT VENTILATOR...
  • Page 27 INSTALLATION Figure 56: Chilled Water (1st Position) & Electric Heating Figure 57: Chilled Water & Hot Water Unit (Cooling Coils (Cooling Coils V[5], S[6], W[7]; Heating Coil 12, 13) V[5], S[6], W[7], Y[8]; Heating Coils 65, 66, 67) Figure 58: Chilled Water and Steam Unit (Cooling Coils V [5], NOTE: Electric heat, right hand only.
  • Page 28 65, 66 Y, 8 G, M, 9, 0 65, 66, 67 68, 69 G, M, 9, 0 12, 13 V, S, W, 5, 6, 7 12, 13 NOTE: "X" Indicates available. One coil per position. DAIKIN APPLIED CLASSROOM UNIT VENTILATOR...

  • Page 29: Typical Valve Packages

    12 = Low Electric Heat Coil 13 = High Electric Heat Coil Typical Valve Packages The optional factory-supplied Daikin Applied control valve(s) for NOTE: Direct Expansion (DX) coils have female sweat water applications are either 2-way or 3-way type. The control connections.
  • Page 30 13 psi (90 kPa) (90 & 103 kPa) 32°F to 200°F 32°F to 200°F Temperature Connection (0°C to 93°C) (0°C to 93°C) 1″ (25 mm) FNPT 8 .0 1⅞″ (47 mm) 1″ (25 mm) ″ (94 mm) DAIKIN APPLIED CLASSROOM UNIT VENTILATOR...
  • Page 31 INSTALLATION 2-Way Modulating Valve (Chilled Water, Hot Water Table 14: 2-Way Actuator Specifications (CW, HW, CW/HW) or Combination) Power Supply 24 VAC, ±20%, 50/60 Hz, 24 VDC, ±10% 3ft [1m], 18 GA plenum cable with 1/2″ Electrical Connection conduit connector Overload Protection electronic throughout 0°...
  • Page 32 15 psi Size Rating B215HT073 0 .73 10 .99 13 .71 16 .11 18 .33 28 .03 36 .74 1/2″ B215HT186 1 .86 22 .34 34 .93 41 .06 46 .70 71 .42 93 .60 DAIKIN APPLIED CLASSROOM UNIT VENTILATOR...
  • Page 33 INSTALLATION 3-Way Modulating Valve (Chilled Water, Hot Water Table 22: 3-Way Actuator Specifications (CW, HW, CW/HW) or Combination) Power Supply 24 VAC, ±20%, 50/60 Hz, 24 VDC, ±10% 3ft [1m], 18 GA plenum cable with 1/2″ Electrical Connection conduit connector Overload Protection electronic throughout 0°...

  • Page 34: Typical Piping Arrangements

    Specific gravity of fluid (water at 60°F = 1.0000) of the valve and to provide the installing contractor with maximum � flexibility in making the field piping connections. Refer to Daikin Cv = Applied factory instruction sheet shipped with the unit for port ∆P...

  • Page 35: Cooling - Chilled Water Eoc Valve Piping

    INSTALLATION Cooling – Chilled Water EOC Valve Piping Control valves must be installed on the units in which they are shipped. Indiscriminate mixing of valves among units can result The 2-way EOC CW valve is furnished normally closed to the in valves not properly sized for the desired flow rate.

  • Page 36: Typical Water Coil Piping - Eoc Valve Piping

    NOTICE Steam connections may be same end as cooling coil 1. All piping, fittings, and unions by others (not Daikin Applied) except as connections, but are recommended to be opposite end to noted. facilitate piping. When using MicroTech controls, they must be 2.

  • Page 37: Heating - Modulating Valve Piping

    Supply-coil connection (Daikin Applied) and stub-up union (by others) Return-coil connection (Daikin Applied) and stub-up union (by others) Supply and return union connections (by others) Two-way EOC steam control valve (Daikin Applied accessory or by others) Vacuum breaker tube (Daikin Applied) Float and thermostatic steam trap (by others) Heating –...
  • Page 38 3-Way Modulating, Normally Open, Hot Water or Legend for Figure 81 2-Pipe CW/HW – Typical Three-way modulating control valve (Daikin Applied accessory or by others) The 3-way Modulating hot water (or 2-pipe CW/HW) valve is furnished normally open to the coil. When the valve is de- Coil (Auto) air vent (Daikin Applied) energized (off) there is full flow through the coil.

  • Page 39: Condensate Piping

    Legend for Figure 83 Daikin Applied cooling unit ventilators are designed for Two-way modulating control valve (Daikin Applied accessory or by condensate removal into a condensate disposal system. Do not others) connect the unit drain connection so that condensate exits to the Coil (Auto) air vent (Daikin Applied) outside and/or is exposed to freezing temperatures.

  • Page 40: Unit Ventilator Split Systems Guidelines

    7/8″ and smaller diameter suction line piping (proper The DX system must incorporate the following, provided by suction gas sensing and reduced hunting), see Figure 87 on others, for proper operation: page 41 . DAIKIN APPLIED CLASSROOM UNIT VENTILATOR...
  • Page 41 INSTALLATION • Insulate the TXV bulb (reacts to refrigerant temperatures Figure 87: Insulate Bulb and Suction Line Piping and not ambient), see Figure 87 on page 41 . • Insulate the suction line piping (minimum heat pickup), see Figure 86 &...

  • Page 42: Checking System Charge

    15 - 16°F subcooling. Figure 89: Typical Unit Ventilator/Condensing Unit Wiring Diagram WARNING Hazardous Voltage! Disconnect all electric power including remote disconnects before servicing. Failure to disconnect power before servicing can cause severe personal injury or death. DAIKIN APPLIED CLASSROOM UNIT VENTILATOR...

  • Page 43: Determining System Superheat

    INSTALLATION Determining System Superheat NOTICE Typical conditions - 95ºF ambient, 45ºF saturated suction temperature, 105ºF After the subcooling has been determined, check system saturated liquid temperature, 6-7ºF superheat, 15ºF subcooling. superheat. 1 . Determine required superheat from superheat range, Table Superheat Adjustment 30 .

  • Page 44: Field Installed Accessories

    Align each end panel with the top and front edges of the ceiling unit ventilator. Attach each end panel to the unit ventilator using the Allen wrench provided. (Figure 91) Figure 91: Install End Panels (1″ End Panel Shown) Tinnerman Clips End Panel DAIKIN APPLIED CLASSROOM UNIT VENTILATOR...

  • Page 45: Electrical And Controls

    ELECTRICAL AND CONTROLS Electrical and Controls WARNING To avoid electrical shock, personal injury, or death, be sure that field wiring complies with local and national fire, safety, and electrical codes, and Electrical Heating Data voltage to the system is within the limits shown in the job-specific drawings and unit electrical data plate(s).

  • Page 46: Unit Electrical And Control Connections

    MicroTech Unit Mounted Direct Digital 2 . Communication Module (optional): Plug-in network communication module that is attached to the UVC Control (DDC) Components - Models AHF, via a 12-pin header and 4 locking standoffs. Available AHV, and AHR communication modules: •...
  • Page 47 (Model AHF and AHB only). outdoor air damper. With network applications, the unit mounted sensor can be overridden by a remote sensor 11 .

  • Page 48: Economizer Control Capabilities

    19 . Control Valve(s) (not shown): Optional accessory Temperature Sensor) to determine if outdoor air can be used for valve(s) may be either 2 position End of Cycle (AHF and “free”, economizer cooling operation. AHB models) or modulating (AHV and AHR models), to control the quantity of water through the coil.

  • Page 49: Local User Interface (Lui)

    ELECTRICAL AND CONTROLS Local User Interface (LUI) Fan States • High (constant speed) Figure 94: Local User Interface (LUI) • Medium (constant speed) • Low (constant speed) • Auto (part load, variable air) – Varies the fan speed automatically to meet the room load conditions whether the unit is in heating, cooling or economizer mode.

  • Page 50: Typical Microtech Wiring Diagrams

    ELECTRICAL AND CONTROLS Typical MicroTech Wiring Diagrams Figure 95: Electromechanical Controls – A2L Leak Mitigation DAIKIN APPLIED CLASSROOM UNIT VENTILATOR...
  • Page 51 ELECTRICAL AND CONTROLS Figure 96: Typical MicroTech Wiring – 115 Volt/60 Hz /1 Ph WWW.DAIKINAPPLIED.COM IM 1399...
  • Page 52 ELECTRICAL AND CONTROLS Figure 97: Typical MicroTech Wiring Diagram – Service and Disconnect, 115 Volt/60 Hz/1 Ph DAIKIN APPLIED CLASSROOM UNIT VENTILATOR...
  • Page 53 NOTE 2: External wiring options - see IM for the different configured options, wiring to be minimum 18 gauge, 90°C. NOTE 3: EC Motors are factory programmed for specified airflow. Contact Daikin Applied for replacement. NOTE 4: Cap extra wire. Switch wire 42A to red wire for 208V operation.

  • Page 54: Microtech Unit Electrical Connections

    2 . Wire leads provided from unit ventilator electric connection box to load side of unit power switch (switch provided by Daikin Applied). The junction box has 1″ (25 mm) and 2″ (51 mm) knockouts, located 10-1/2″ (267 mm) from right end of unit.

  • Page 55: Microtech Wall Mounted Sensor

    ELECTRICAL AND CONTROLS Figure 99: MicroTech Control DDC Electric Connection Box WARNING Located in Right End Compartment To avoid electrical shock, personal injury, or death: 1. Installer must be a qualified, experienced technician. 2. Disconnect power supply before installation to prevent electrical shock and damage to equipment.

  • Page 56: Typical Connections For Temperature Sensor

    Adjoining Wiring Wiring with Caps Harnesses from (See the Wiring the Wall Sleeve Diagram Provided Interior Wall Assembly. on the Unit Ventilator Window Exposure Right Front Access Panel.) Plug for Unit Mounted Sensor Window Exposure DAIKIN APPLIED CLASSROOM UNIT VENTILATOR...

  • Page 57: Sensor Functions

    The mixing of room air and air from within the wall cavity can lead to condensation, erroneous readings and sensor failure. To prevent these conditions, Daikin Applied recommends sealing the conduit leading to the junction box with fiberglass. Mounting Base Plate Cover Lockdown Screws 1/16″...

  • Page 58: Typical Wiring

    AC power wiring is present in the same conduit as the signal lines. If you are experiencing any of these difficulties, please contact your Daikin Applied representative. Table 34: Unit Ventilator MicroTech Board to Room Temperature Sensor Wiring...

  • Page 59: Making Control Connections

    Digital Ready™ – Face & Bypass Control these temperatures. Wired so that upon (T6) cut out, the Components Model AHF outside air damper (A1) closes, the hot water valve opens and the 24 volt power supply to the terminal strip (T6 Sig) Digital Ready is a factory installed pre-wired package of selected is interrupted.

  • Page 60: Wiring Diagrams

    ELECTRICAL AND CONTROLS Digital Ready Face and Bypass Control Wiring Diagrams Figure 107: Digital Ready Face and Bypass Control - 208-230 V/60 Hz/1 Ph DAIKIN APPLIED CLASSROOM UNIT VENTILATOR...
  • Page 61 ELECTRICAL AND CONTROLS Figure 108: Digital Ready Face and Bypass Control - 120 V/60 Hz/1 Ph WWW.DAIKINAPPLIED.COM IM 1399...
  • Page 62 ELECTRICAL AND CONTROLS Figure 109: Digital Ready Face and Bypass Control - 265 V/60 Hz/1 Ph DAIKIN APPLIED CLASSROOM UNIT VENTILATOR...
  • Page 63 ELECTRICAL AND CONTROLS Wiring Schematics Legend for "Digital Ready Face and Bypass Control Wiring Diagrams" Legend Actuator- Outdoor Air Switch Disconnect Actuator- Face & Bypass Switch - On, Off, and Fan Speed Switch - Unit Power Thermostat - Freeze Stat FA/FB Fuse–...

  • Page 64: Digital Ready Unit Mounted Temperature Sensor Specifications

    24 VAC ±20% 6 VA 8 VA 35 in-lb 90° with spring mounting. Air Damper Actuator 50/60 HZ Holding: 2 Watt (class 2 power source) return 15s Motor: reversible with built in switch. 3.6 VA DAIKIN APPLIED CLASSROOM UNIT VENTILATOR...

  • Page 65: Digital Ready Unit Electrical Connections

    1. 2 . Wire leads provided from unit ventilator electric connection box to load side of unit power switch (switch provided by Daikin Applied). The junction box has 1″ (25 mm) and 2″ (51 mm) Figure 112: Terminal Strip WWW.DAIKINAPPLIED.COM...

  • Page 66: Controls By Others Components

    Cuts out below 38°F ± 2°F and automatically resets above 45°F ± 2°F. Responds when any 15% of the capillary Daikin Applied unit ventilators come with factory installed length senses these temperatures. components and wiring. It facilitates the field hookup of controls...

  • Page 67: Controls By Others - Variable Airflow

    ELECTRICAL AND CONTROLS Controls by Others - Variable Making Control Connections Airflow For field provided control wiring connections refer to the appropriate control wiring schematic, Figure 115 through Figure An optional EC motor with “variable fan speed control” allows 120 . a field provided DDC controller to modulate the unit airflow Connect the field supplied controller to the harness provided.

  • Page 68: Typical Controls By Others Wiring Diagram - Units With Optional Ec Motor With Variable Airflow

    ELECTRICAL AND CONTROLS Typical Controls by Others Wiring Diagram – Units with Optional EC Motor with Variable Airflow Figure 115: Variable Airflow 208-230V /60 Hz/1 Ph – Motor Switchbox, Non-Electric Heat Units DAIKIN APPLIED CLASSROOM UNIT VENTILATOR...
  • Page 69 ELECTRICAL AND CONTROLS Figure 116: Variable Airflow 208-230V /60 Hz/1 Ph – Motor Switchbox, Non-Electric Heat Units WWW.DAIKINAPPLIED.COM IM 1399...
  • Page 70 ELECTRICAL AND CONTROLS Figure 117: Variable Airflow 115 V/60 Hz/1 Ph – Motor Switchbox, Non-Electric Heat Units DAIKIN APPLIED CLASSROOM UNIT VENTILATOR...
  • Page 71 ELECTRICAL AND CONTROLS Figure 118: Variable Airflow 115 V/60 Hz/1 Ph – Motor Switchbox, Non-Electric Heat Units WWW.DAIKINAPPLIED.COM IM 1399...
  • Page 72 ELECTRICAL AND CONTROLS Figure 119: Variable Airflow 265 V/60 Hz/1 Ph – Motor Switchbox, Non-Electric Heat Units DAIKIN APPLIED CLASSROOM UNIT VENTILATOR...
  • Page 73 ELECTRICAL AND CONTROLS Figure 120: Variable Airflow 265 V/60 Hz/1 Ph – Motor Switchbox, Non-Electric Heat Units WWW.DAIKINAPPLIED.COM IM 1399...
  • Page 74 NOTE 6: Automatic temperature control can be wired to TB-DE for de-cooling operation. Typical operation is to wire from the TB-DE to a Normally Open relay, with the relay closing on control call for cooling. For additional information, contact Daikin Applied.

  • Page 75: Field Installed

    ELECTRICAL AND CONTROLS Typical Controls by Others Wiring Diagram – Field Installed Figure 121: Controls by Others – Field Installed - 208-230 V/60 Hz/1 Ph WWW.DAIKINAPPLIED.COM IM 1399...
  • Page 76 ELECTRICAL AND CONTROLS Figure 122: Controls by Others – Field Installed - 120 V/60 Hz/1 Ph DAIKIN APPLIED CLASSROOM UNIT VENTILATOR...
  • Page 77 ELECTRICAL AND CONTROLS Figure 123: Controls by Others – Field Installed - 120 V/60 Hz/1 Ph WWW.DAIKINAPPLIED.COM IM 1399...
  • Page 78 ELECTRICAL AND CONTROLS Figure 124: Controls by Others – Field Installed - 265 V/60 Hz/1 Ph DAIKIN APPLIED CLASSROOM UNIT VENTILATOR...
  • Page 79 ELECTRICAL AND CONTROLS Figure 125: Controls by Others – Field Installed - 265 V/60 Hz/1 Ph WWW.DAIKINAPPLIED.COM IM 1399...
  • Page 80 NOTE 6: Automatic temperature control can be wired to TB-DE for de-cooling operation. Typical operation is to wire from the TB-DB to a Normally Open relay, with the relay closing on control call for cooling. For additional information, contact Daikin Applied.

  • Page 81: Controls By Others - Electrical Connections

    2 . Wire leads provided from unit ventilator electric connection box to load side of unit power switch (switch provided by Daikin Applied). The junction box has 1″ (25 mm) and 2″ (51 mm) knockouts, located 10-1/2″ (267 mm) from right end of unit.

  • Page 82: Typical Electric Heat Wiring Diagram

    ELECTRICAL AND CONTROLS Typical Electric Heat Wiring Diagram Figure 128: Electric Heat Wiring Diagram – Typical 460 V/60 Hz/3 Ph DAIKIN APPLIED CLASSROOM UNIT VENTILATOR...
  • Page 83 ELECTRICAL AND CONTROLS Figure 129: Electric Heat Wiring Diagram – Typical 460 V/60 Hz/3 Ph WWW.DAIKINAPPLIED.COM IM 1399...
  • Page 84 NOTE 8: Automatic temperature control can be wired to TB-DE for the de-cooling operation. Typical operation is to wire from the TB-DE to a normally open relay with the relay closing on the control call for cooling. For additional information, contact Daikin Applied.

  • Page 85: Operation

    Provide completed Check, Test and Start form to your local □ Unit is square and level and is running smoothly and quietly. Daikin Applied representative and specifying engineer for □ Refrigerant Detection System for refrigerant leak mitigation verification that proper start-up was completed. See page 94 .

  • Page 86: Maintenance

    Filters should be checked monthly or permanently lubricated. more often if conditions indicate. Filters are included in all units. Daikin Applied single-use filters are standard on all but NOTICE electric heat units, which come with permanent wire mesh filters.
  • Page 87 MAINTENANCE Figure 131: Filter Access 12″ Bottom-Hinged Access Panel Louvered Bottom- Hinged Access Panel Filter Figure 132: Removing Filter Filter Location Filter Bracket Loosen Screws on the Safety Chains Released from Slotted Filter Bracket and Unit Frame to Allow Full Swing Slide Bracket Away to of Louvered Panel Access Filter...

  • Page 88: Refrigerant Information

    Always maintain proper airflow and do not allow filters, air inlets, 2000 1 .312 or air outlets to become blocked. Refer to Table 2250 1 .351 2500 1 .390 2750 1 .429 3000 1 .468 3250 1 .507 3500 1 .546 DAIKIN APPLIED CLASSROOM UNIT VENTILATOR...
  • Page 89 WARNING Only auxiliary devices approved by Daikin Applied or declared suitable for installation with R-32 shall be installed in the connecting ductwork. WWW.DAIKINAPPLIED.COM IM 1399...

  • Page 90: Competence Of Personnel

    • When brazing is required, the following procedures shall be sensors does not match the number of sensors detected carried out in the right order: online. — Remove the refrigerant. If the recovery is not required by national regulations, drain the refrigerant to the DAIKIN APPLIED CLASSROOM UNIT VENTILATOR...

  • Page 91: Leak Detection

    REfRIgERANT INfORMATION Detection of flammable refrigerants • More than 2 seconds and less than 5 seconds: The display shows sensor(s) status info: The following leak detection methods are deemed acceptable for — The current LFL level. all refrigerant systems: — Loss of communication or faulted state reported by a •...

  • Page 92: Handling And Storage

    • Hoses or lines shall be as short as possible to minimize the a set of calibrated weighing scales shall be available and in amount of refrigerant contained in them. good working order. Hoses shall be complete with leak-free DAIKIN APPLIED CLASSROOM UNIT VENTILATOR...
  • Page 93 REfRIgERANT INfORMATION disconnect couplings and in good condition. Before using the 10 . When the cylinders have been filled correctly and the recovery machine, check that it is in satisfactory working order, process completed, make sure that the cylinders and the has been properly maintained and that any associated electrical equipment are removed from site promptly and all isolation components are sealed to prevent ignition in the event of a...

  • Page 94: Appendix

    Deadband 6° or _______°F III. Refrigeration system A. Has all field piping been leak tested to 100 psig (AVS, AVV, AVR, AHF, AHV, & AHR)? ....... Yes  No  B. Is expansion valve bulb properly installed and insulated? ................Yes ...
  • Page 95 Out _______°F/_______°F VI. Performed by: Company: __________________________________________________________________________________________________________ Name: _____________________________________________________________________________________________________________ Title: ______________________________________________________________________________________________________________ Signature: ______________________________________________________________________ Date: ______________________________ Comments: ____________________________________________________________________________________________________________ ___________________________________________________________________________________________________________________ ___________________________________________________________________________________________________________________ ___________________________________________________________________________________________________________________ ___________________________________________________________________________________________________________________ ___________________________________________________________________________________________________________________ Service Technician: ______________________________________________________________________________________________________ Contractor Representative: ________________________________________________________________________________________________ WWW.DAIKINAPPLIED.COM IM 1399 © 2024 Daikin Applied • www.DaikinApplied.com Form 5F-4240 (06/2024)

  • Page 96: Limited Product Warranty

    (collectively “Owner”) that, subject to the exclusions set forth below Company, at its option, will repair or replace defective parts in the event any product manufactured by Company, including products sold under the brand name Daikin and used in the United States or Canada, proves defective in material or workmanship within twelve (12) months from initial startup or eighteen (18) months from the date shipped by Company, whichever occurs first.

  • Page 97: Notes / Comments

    APPENDIx Notes / Comments WWW.DAIKINAPPLIED.COM IM 1399...
  • Page 98 1 - 8 0 0 - 4 3 2 - 1 3 4 2 | 7 6 3 - 5 5 3 - 5 3 3 0 LEARN MORE AT DAIKINAPPLIED.COM PART NUMBER: IM1399 © 2025 DAIKIN APPLIED | (800) 432.1342 | WWW.DAIKINAPPLIED.COM...

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