Johnson Controls M Series Owner's Manual
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Johnson Controls M Series Owner's Manual

Johnson Controls M Series Owner's Manual

9k - 24k multi zone system floor and ceiling type indoor unit
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See also: Owner's Manual , Installation and Maintenance Manual
"M" and "W" Series
9K - 24K Multi Zone System
Floor and Ceiling Type
Indoor Unit
Owner's Manual
Air Conditioning Units
Models
DHMW09NCB21S
DHMW12NCB21S
DHMW18NCB21S
DHMW24NCB21S
Please read this Installation and Operation manual
carefully before installation and operation and retain it for
future reference.

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  • Page 1 "M" and "W" Series 9K - 24K Multi Zone System Floor and Ceiling Type Indoor Unit Owner's Manual Air Conditioning Units Models DHMW09NCB21S DHMW12NCB21S DHMW18NCB21S DHMW24NCB21S Please read this Installation and Operation manual carefully before installation and operation and retain it for future reference.
  • Page 2 Important Notice ● Johnson Controls, Inc. pursues a policy of continuing improvement in design and performance in its products. As such, Johnson Controls, Inc. reserves the right to make changes at any time without prior notice. ● Johnson Controls, Inc. cannot anticipate every possible circumstance that might involve a potential hazard.

  • Page 3: Table Of Contents

    Table of Contents 1 Introduction and Safety Summary..............i 1 Additional Usage Information................1 2 Installation Precautions and Location Selection..........2 2.1 Installation Precautions ..................2 2.2 Selecting Location ....................2 2.3 Imappropriate Location ..................2 3 Installation of Floor and Ceiling Type Indoor Unit ..........3 3.1 Space Dimension for Unit Installation .
  • Page 4 Never bypass or jump-out any safety device or switch. ● Johnson Controls, Inc. will not assume any liability for injuries or damage caused by not following steps outlined or described in this manual. Unauthorized modifications to Johnson Controls products are prohibited as they…...
  • Page 5 Take the following precautions to reduce the risk of property damage. ● Be careful that moisture, dust, or variant refrigerant compounds not enter the refrigerant cycle during installation work. Foreign matter could damage internal components or cause blockages. ● If air filters are required on this unit, do not operate the unit without the air filter set in place. If the air filter is not installed, dust may accumulate and breakdown may result.
  • Page 6 Controls uses only refrigerants that have been approved for use in the unit’s intended home country or market. Johnson Controls distributors similarly are only authorized to provide refrigerants that have been approved for use in the countries or markets they serve. The refrigerant used in this unit is identified on the unit’s faceplate and/or in the associated manuals.
  • Page 7 under pressure and never open pressurized system parts. ● Before installation is complete, make sure that the refrigerant leak test has been performed. If refrigerant gases escape into the air, turn OFF the main switch, extinguish any open flames and contact your service contractor.
  • Page 8 ● Communication cabling shall be a minimum of 18-Gauge, 2-Conductor, Stranded Copper. Shielded cable must be considered for applications and routing in areas of high EMI and other sources of potentially excessive electrical noise to reduce the potential for communication errors. When shielded cabling is applied, proper bonding and termination of the cable shield is required as per Johnson Controls guidelines.

  • Page 9: Additional Usage Information

    Addtional Usage Information ◆ When purchasing or installing multi-zone DFS systems, the combination ratio must not exceed 150% of outdoor unit capacity. If the connecting indoor units exceed the recommended combination ratio then capacity will be greatly reduced and may damage the system. ◆...

  • Page 10: Installation Precautions And Location Selection

    2 Installation Precautions and Location Selection 2.1 Installation Precautions The installation of the air conditioning unit must comply with national and local safety laws. The installation location directly affects the normal use, so the user should ensure installation and startup is done by a certified technician according to instructions in this manual.

  • Page 11: Installation Of Floor And Ceiling Type Indoor Unit

    3 Installation of Floor and Ceiling Type Indoor Units 3.1 Space Dimensions for Unit Installation The space around the unit is adequate for ventilation. (Refer to Fig.1) POWER TIMER > " 23-1/2 > 23-1/2" >39" >12" > 7-7/8" >59" > "...
  • Page 12 Installation Side panel fixing screw (M4) paper plank Fig.2 Fig.3 (3). Set the suspension bolt. (Use W3/8 or M10 size suspension bolts.) ＊ Adjust the distance from the unit to the ceiling slab beforehand. (Refer to Fig.4.) (4). Secure the hanger bracket to the suspension bolt. Warning! ＊...
  • Page 13 Ceiling Hanger bracket 40 or less Hanger bracket setting bolt(M8) Suspension bolt Hanger bracket Hanger bracket fixing bolt(M6) Fig.4 Fig.5 Ceiling slab Hanger bracket Stop cap/stop nut Fig.6 Fig.7 Fig.8 Fig.9 When installing the indoor unit, refer to the paper pattern for installation. Make sure that the drainage side must be 1/2 in.

  • Page 14: Electrical Wiring

    Model DHMW09NCB21S DHMW12NCB21S 1220 1158 DHMW18NCB21S DHMW24NCB21S 3.4 Electrical Wiring Caution: The power of every indoor unit should be equal to the outdoor unit. Open the front panel. ① . Remove the electrical box cover. ② . Route the power connection cord from the back of the indoor unit and pull it toward the front ③...
  • Page 15 DHM42CMB21S POWER Caution! A n incorrect wiring connection would lead to a malfunction of some of the electric parts. ① . B e sure to leave some space between the connecting end and the clamp end after the ② . wiring is secured.

  • Page 16: Condensate Pipe Installation

    3.5 Condensate Pipe Installation Make sure the drain flows smoothly (1). Condensate piping. ＊ Either the right rear or right side of the unit is suitable for securing the condensate pipe. ＊ The diameter of the condensate pipe should be equal to or greater than that of the connecting pipe.

  • Page 17: Install The Connection Pipes

    3.6 Install the Connection Pipes Pipe Flare Nut Pipe Wrench Wrench Nut-Required Torque Required Torque (ft. lbs.) Pipe Diameter 1/4" 15--30 3/8" 35-40 1/2" 45-50 5/8" 60-65 (1). Align the flared end of the copper tube with the threaded connector, and then hand-tighten the flared nut.

  • Page 18: Nomenclature Of Floor And Ceiling Type Indoor Units

    4 Nomenclature of Floor and Ceiling Type Indoor Units Air outlet Guide louver Front panel Air filter, purifier (in air inlet grille) Connecting pipe Air inlet Suitable model: DHMW09NCB21S DHMW12NCB21S DHMW18NCB21S DHMW24NCB21S Note: Different models of air conditioning units as indicated have the same appearances.

  • Page 19: Working Temperature Range

    5 Working Temperature Range Working Temperature Range Indoor side state ℉（℃） Outdoor side state ℉（℃） Dry bulb Wet bulb Dry bulb Wet bulb temp. ℉（℃） temp. ℉（℃） temp. ℉ （℃） temp. ℉ （℃） Rated. Cooling 80.0(26.7) 67.0(19.4) 95.0(35.0) 75.0(23.9) Max. cooling 80.0(26.7) 67.0(19.4) 115 .0(46.1)

  • Page 20: Maintenance Method

    6 Maintenance Methods Warning! T urn off the unit and disconnect the power supply when cleaning the air conditioning unit. ① . I f the indoor coil is to be cleaned using a recommended coil cleaner, it must be thoroughly ②...

  • Page 21: Operating Instructions

    7 Operating Instructions ＊ The temperature setpoint ＊ Airflow direction will be changed should be set at a moderate level by adjusting the louvers and flaps as to avoid unnecessary energy shown. consumption. ＊ Have a certified technician ＊Save energy by closing windows and clean the air filter as needed for doors while operating the unit.
  • Page 22 ＊ Check electrical system (voltage and frequency). Use the power supply ＊If short circuit suddenly happens, turn indicated on the nameplate of the unit to off the unit. If the unit is not to be operate the unit. Certified technicians used for a long period, turn off the main should only use fuses with specified power supply.

  • Page 23: Malfunction Analysis

    8 Malfunction Analysis Warning! Please check the following malfunction analysis before contacting your local installer or service technician. Malfunction Event Malfunction Analysis After turning off the air The overload protection switch of the unit needs three minutes conditioning unit, it could not before restarting.

  • Page 24: Service Center

    8.1 Service Center When the following events occur, please stop operating immediately, disconnect the power supply and contact your local contractor for help. ＊Harsh sound is heard when the unit is running. ＊When the fuse blows or the circuit breaker trips frequently. ＊When some object or water is sucked into the unit accidently.
  • Page 26 Product improvement, specifications and appearance in this manual are subject to change without prior notice. © Johnson Controls, Inc. USA LIT-12012202...

This manual is also suitable for:

W seriesDhmw09ncb21sDhmw12ncb21sDhmw18ncb21sDhmw24ncb21s

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