Johnson Controls DHMW09NCB21S Owner'S Manual Download Page 1

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Owner's Manual

Air Conditioning Units

Model

Please read this

Installation and Operation

manual

carefully before

installation and

operation and retain it for

future reference

DHMW09NCB21S
DHMW12NCB21S
DHMW18NCB21S
DHMW24NCB21S

"M" and "W" Series

9K -

24K

Mult

Zone

System

Floor and Ceiling Type

Indoor Unit

Summary of Contents for DHMW09NCB21S

Page 1: ...e read this Installation and Operation manual carefully before installation and operation and retain it for future reference DHMW09NCB21S DHMW12NCB21S DHMW18NCB21S DHMW24NCB21S M and W Series 9K 24K Multi Zone System Floor and Ceiling Type Indoor Unit ...

Page 2: ...d advanced information to maintain and service this inverter driven cooling or heat pump air conditioning unit which you operate as well for other models This inverter driven cooling or heat pump air conditioning unit has been designed for a specific temperature range For optimum performance and long life operate this unit within range limits This manual should be considered as a permanent part of...

Page 3: ...9 4 Nomenclature of Floor and Ceiling Type Indoor Units 10 5 Working Temperature Range 11 6 Maintenance Method 12 6 1 Cleaning the Air Filters 12 6 2 Cleaning the Unit 12 6 3 At the Start of the Season 12 6 4 During the off Season 12 7 Operating Instructions 13 8 Malfunction Analysis 15 8 1 Service Center 16 17 1 Introduction and Safety Summary i Support Contact Information ...

Page 4: ...orrectly injuries may occur due to a falling unit Use appropriate Personal Protective Equipment PPE such as gloves and protective goggles and where appropriate have a gas mask nearby Also use electrical protection equipment and tools suited for electrical operation purposes Keep a quenching cloth and a fire extinguisher nearby during brazing Use care in handling rigging and setting of bulky equipm...

Page 5: ...sure the condensate hose discharges water properly If connected incorrectly it may cause leaks Do not install the unit in any place where oil can seep onto the units such as table or seating areas in restaurants and so forth For these locations or social venues use specialized units with oil resistant features built into them In addition use a specialized ceiling fan designed for restaurant use Th...

Page 6: ...son Controls Johnson 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 Any addit...

Page 7: ...gas and liquid valves otherwise these devices will be damaged It is closed before shipment If the arrangement for outdoor units is incorrect it may cause flowback of the refrigerant and result in failure of the outdoor unit The refrigerant system may be damaged if the slope of the piping connection kit exceeds 15o Electrical Precautions Take the following precautions to reduce the risk of electric...

Page 8: ...nel to the indoor or outdoor units without turning OFF the main power supply After ceasing operation be sure to wait at least five minutes before turning off the main power switch Otherwise water leakage or electrical breakdown may result Disconnect the power source completely before attempting any maintenance for electrical parts Check to ensure that no residual voltage is present after disconnec...

Page 9: ...easy access Overcurrent protection is required UL 1995 CSAC22 2 The cooling range of the unit is the outdoor environment temp 5 48 C DB the heating range of the unit only for the heat pump type unit is the outdoor environment temperature 15 27 DB This product must not be disposed of with domestic waste This product has to be disposed of at an authorized place for recycling of electrical and electr...

Page 10: ...oom A place where condensate water can be easily drained A place that can handle the weight of the indoor unit A place which is easy for maintenance A place where it is easy to get connected with the outdoor unit A place that is 3 2 ft 1m or more away from other electric appliances such as television audio device etc Avoid a location where there is a heat source high humidity or flammable gas Do n...

Page 11: ... Floor type These two types of units have similar installing procedures as follows 1 Determine the mounting position on ceiling or wall by using a paper pattern to indicate an indoor frame Mark and pull out the cardboard template Refer to Fig 2 below 2 Remove the return grille the side panel and the hanger bracket from the indoor unit as per procedures below Press the securing knob of the air inta...

Page 12: ... stop nut stop cap 5 Lift the unit and slide it forward in place Refer to Fig 7 below 6 Screw tightly both hanger bracket setting bolts M8 Refer to Fig 5 below 7 Screw tightly both hanger bracket fixing bolts M6 to prevent the displacement of the indoor unit Refer to Fig 5 below 8 Adjust the height so that the rear side of the condensate pipe slightly inclines to improve drainage Caution Adjust th...

Page 13: ...tting bolt M8 Hanger bracket fixing bolt M6 Hanger bracket Fig 6 Fig 7 Fig 9 Fig 8 When installing the indoor unit refer to the paper pattern for installation Make sure that the drainage side must be 1 2 in 10mm lower than the other side in order to drain the condensate water easily and smoothly A B C D H Unit mm Stop cap stop nut ...

Page 14: ... the hole of the chassis and the bottom of the appliance upward and then connect the power line and the communication line from the outdoor unit to the corresponding terminals N 1 2 3 and grounding terminal of the indoor unit Wiring should be correct as per the wiring diagram Note It is essential that the connecting cables from the outdoor unit to the indoor units are confirmed per circuit to prev...

Page 15: ...T5 XT6 N L G G G G G Caution An incorrect wiring connection would lead to a malfunction of some of the electric parts Be sure to leave some space between the connecting end and the clamp end after the wiring is secured The installing operation should comform to national and local wiring regulations DHM42CMB21S ...

Page 16: ...ape until the screw head is less than 5 32 in 4mm from the hose Refer to Fig 11 Fig 12 below There should be no folding of the condensate hose inside the indoor unit Refer to Fig 12 2 Confirm that smooth drainage is achieved after the piping work Pour 20 oz 600cc of water into the condensate pan from the air outlet to confirm proper drainage Refer to Fig 13 When condensate hose is connected Inclin...

Page 17: ...rapped with sufficient insulating material for the environment in which the unit will operate During the piping do not pull any connector forcefully to prevent the capillary and other pipes from cracking which then would result in leakage The pipe should be properly supported in a way that its weight will not be borne by the unit If the specification of the outdoor unit pipe joint does not conform...

Page 18: ...s Connecting pipe Air outlet Air inlet Guide louver Air filter purifier in air inlet grille Front panel Suitable model DHMW09NCB21S DHMW12NCB21S DHMW18NCB21S DHMW24NCB21S Note Different models of air conditioning units as indicated have the same appearances ...

Page 19: ...b temp Wet bulb 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 75 0 23 9 Min cooling 67 0 19 4 57 0 13 9 67 0 19 4 57 0 13 9 Rated Heating 70 0 21 1 60 0 15 6 47 0 8 3 43 0 6 1 Max heating 80 0 26 7 75 0 23 9 65 0 18 3 Low Ambient heating 70 0 21 1 60 0 15 6 5 0 15 0 3 2 16 0 ...

Page 20: ...ing is necessary 6 2 Cleaning the Unit Clean the air conditioning unit and the remote control with a dry cloth or a vacuum cleaner If a damp cloth is used remove remaining moisture by using a dry cloth afterward Caution Do not use benzine solvent gasoline thinners or polishing products for cleaning Do not wash with hot water above 104 F 40 Some parts of the unit may become deformed 6 3 At the Star...

Page 21: ...ection will be changed by adjusting the louvers and flaps as shown Have a certified technician clean the air filter as needed for higher efficiency Save energy by closing windows and doors while operating the unit Reduce energy consumption by covering windows with a blind or a curtain to prevent heat from sunlight when the unit is cooling ...

Page 22: ... use fuses with specified capacity Do not insert objects into the air inlet or outlet when the air conditioner is running as it may cause damage or personal injury Also pay special attention when children are around Do not place any obstacles around the indoor and outdoor unit to avoid inefficient performance or malfunction Never expose infants the elderly or patients directly to the airflow Do no...

Page 23: ...cause some grating sounds The air conditioning unit does not run Is the unit powered off Is the unit disconnected from power supply Did the circuit breaker trip Was the TIMER set in the wireless remote controller The cooling heating of the air conditioning unit is poor Is the temperature set properly Is the inlet or outlet of the unit blocked Is the air filter too dirty and causing blockage Are th...

Page 24: ...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 25: ...17 ...

Page 26: ... Johnson Controls Inc USA LIT 12012202 Product improvement specifications and appearance in this manual are subject to change without prior notice ...

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