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Carrier 42NX Installation, Operation And Maintenance Instructions
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Carrier 42NX Installation, Operation And Maintenance Instructions

Carrier 42NX Installation, Operation And Maintenance Instructions

Ductable fan coil unit
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I N S TA L L AT I O N ,
O P E R AT I O N
A N D
M A I N T E N A N C E
I N S T R U C T I O N S
DUCTABLE FAN COIL UNIT
42NX
Translation of the original document

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Summary of Contents for Carrier 42NX

  • Page 1 O P E R AT I O N A N D M A I N T E N A N C E I N S T R U C T I O N S DUCTABLE FAN COIL UNIT 42NX Translation of the original document...

  • Page 2: Table Of Contents

    CONTENTS 1 - GENERAL ...................................... 20 2 - SAFETY ......................................20 3 - DESCRIPTION OF THE UNIT ............................... 21 3.1  -  Components (figure 2)................................21 3.2  -  Name plate (figure 3)................................. 21 3.3  -  Specific code  .................................... 21 3.4  -  Models ....................................... 24 3.5  -  Clearances required .................................. 25 3.6 ...
  • Page 3 Fig.1...
  • Page 4 Fig.2 42NX 2, 3 and 4 – Suspended ceiling and Raised floor...
  • Page 5 42NX 5 – Suspended ceiling...
  • Page 6 Fig.3 Fig.4 Suspended ceiling, size 2, 3, 4 42NX 2 42NX 3 42NX 4 1242 42NX 5 1542...
  • Page 7 Fig.5 Raised floor, size 2, 3, 4 42NX 2 42NX 3 42NX 4 1242 Fig.6 Suspended ceiling with plenum, 2, 3, 4 42NX 2 42NX 3 42NX 4 1242...
  • Page 8 Fig.7 Suspended ceiling, size 5 42NX 5 1542 345 Fig.8 Suspended ceiling with plenum, size 5 42NX 5 1542...
  • Page 9 Fig.9 Fig.10...
  • Page 10 Fig.11 1° 1° ±1° ±1°...
  • Page 11 Fig.12 Fig.13 Remove the fresh air spigot using the 4 screws Attach the adapter spigot supplied with the kit using the 3 screws Adjust in the slots and turn the fresh air damper 12° on the  adapter spigot to tighten it...
  • Page 12 Fig.14 42NX 2,3,4 42NX 5 Sizes 42NX 2 42NX 3 Right 42NX 4 42NX 5...
  • Page 13 42NX 2,3,4 42NX 5 Sizes 42NX 2 42NX 3 Left 42NX 4 42NX 5...
  • Page 14 Fig.15 42NX 2,3,4 See DETAIL A 42NX 5 See DETAIL A DETAIL A SCALE 1:2...
  • Page 15 Fig.16 18 Nm max. Fig.17...
  • Page 16 Fig.18 Electric box...
  • Page 17 Fig.19...
  • Page 18 Fig.20 Fig.21...
  • Page 19 Fig. 22...

  • Page 20: General

    1 - GENERAL Thank you for purchasing a CARRIER unit. We trust that this unit will give you complete satisfaction. The 42NX range of fan coil units is designed to heat or cool residential and tertiary premises (e.g. offices, hotel rooms, shopping  centres). Comfort units are not designed to control the humidity of outside air. Fresh air handling must be provided by a self-contained system  in accordance with accepted engineering practices (see our air handling unit ranges). To guarantee correct operation of the unit, the connections (electrical, hydraulic, etc.) must comply with accepted engineering practices. Your unit must be maintained and installed as recommended in this manual. Each unit bears a name plate. The reference number shown on the name plate must be quoted in all correspondence. In this document, you will find the components described in the following manner:   *optional  : Factory-fitted  *accessory  : Delivered separately. 2 - SAFETY ■ Only specially trained and qualified technicians and installers who have been fully trained on the product are authorised to  install, commission and service this equipment. To prevent injury or damage to the unit or room, work must only be carried out by qualified personnel.

  • Page 21: Description Of The Unit

    K Maximum permissible water pressure   F Maximum power and maximum current L Coil fluid G Maximum capacity of the coil 3.3 - Specific code Digit n° Feature name Value Description Compatibility Codification Range 42NX Chassis size 1 Chassis size 2 Frame Size Chassis size 3 Chassis size 4 Chassis size 5 2-pipe coil Water coil type 4-tube coil 2-row coil Number of water coil rows 3-row coil...
  • Page 22 3 - DESCRIPTION OF THE UNIT Digit n° Feature name Value Description Compatibility Codification Without actuator The 24 V actuators are not available with the  Carrier controllers and the electric terminal block 230 V ON/OFF actuator 230 V floating actuator (3-point) Valve actuator 24 V ON/OFF actuator The 3-point floating actuators are not available  with the electric terminal block 24 V floating actuator (3-point) Modulating 0-10 V/24 V actuator No sensor Return air temperature sensor Water temperature sensor Water and return air temperature sensor , water and return air temperature  sensor , water, supply air and return air  temperature sensor Supply air and return air temperature sensor Supply air and water temperature sensor Sensors Supply air temperature sensor  and water temperature sensor Water, supply air and return air temperature ...
  • Page 23 3 - DESCRIPTION OF THE UNIT Digit n° Feature name Value Description Compatibility Codification Without rectangular flange Outlet rectangular flange only Rectangular sleeve Inlet rectangular flange only Rectangular return air and supply air sleeve No nozzles 1 nozzle, diameter 160 mm 2 nozzles, diameter 160 mm 3 nozzles, diameter 160 mm 1 nozzle, diameter 200 mm 2 nozzles, diameter 200 mm Diameter and number of 36-37 3 nozzles, diameter 200 mm return air nozzles 4 nozzles, diameter 200 mm 5 nozzles, diameter 200 mm 1 nozzle, diameter 250 mm 2 nozzles, diameter 250 mm 3 nozzles, diameter 250 mm 4 nozzles, diameter 250 mm No nozzles 1 nozzle, diameter 160 mm...

  • Page 24: Models

    3 - DESCRIPTION OF THE UNIT Digit n° Feature name Value Description Compatibility Codification No controller Sleeve, diameter 100 mm 15 to 50 m³/h controller for nozzle 100 mm in  diameter 50 to 100 m³/h controller for nozzle 100 mm  in diameter Sleeve, diameter 125 mm Fresh air 15 to 50 m³/h controller for nozzle 125 mm in  diameter 50 to 100 m³/h controller for nozzle 125 mm  in diameter 100 to 180 m³/h controller Motorized air damper compatible with NTC and  Adapter for motorised air damper (to be  WTC only (Position feedback is not available if  ordered separately) WTC and CO  sensor are also selected) Bundle packaging Packaging Individual packaging No labelling Labelling With individual labelling No mount Anti-vibration mounts With mount...

  • Page 25: Clearances Required

    3 - DESCRIPTION OF THE UNIT 3.5 - Clearances required ■ Suspended ceiling size 2, 3, 4 - figure 4 ■ Raised floor with plenum 2, 3, 4 - figure 5 ■ Suspended ceiling with plenum 2, 3, 4 - figure 6 ■ Suspended ceiling size 5 - figure 7 ■ Suspended ceiling with plenum size 5 - figure 8 3.6 - Dimensions and weight ■...

  • Page 26: Transport And Handling

    4 - TRANSPORT AND HANDLING 4.1 - Unpacking the unit and checking ■ It is the responsibility of the recipient to inspect the contents of  the packages upon receipt.  ■ Do  not  unpack  the  units  until  just  before  they  are  due  to  be  installed, and make sure they are as close as possible to the  installation site when unpacking them.  ■ Do not place heavy articles of any sort on them. 4.2 - Handling ■ We recommend using a forklift to install the unit, see figure 9.  Warning:  When  moving  the  units,  do  not  use  water  pipes,  condensate drain pan, spigots, sleeves, valves or flexible pipes ...

  • Page 27: Installation And Connections

    5 - INSTALLATION AND CONNECTIONS 5.3.2 - Recommended atmosphere for use 5.1 - General installation requirements The  unit  has  been  designed  for  indoor  applications,  in  a  non- ■ Prior to installation, check the dimensions of the unit to ensure  corrosive, dust-free environment. that  there  will  be  sufficient  space  to  allow  maintenance  and  servicing ...

  • Page 28: Hydraulic Connections

    5 - INSTALLATION AND CONNECTIONS 5.3.6 - Adjusting the fresh air spigots 5.4.2 - Water quality recommended for water coils The  unit  may  be  equipped  with  three  constant  and  adjustable  It  is  recommended  to  conduct  a  bacteriological  analysis  (for  ranges of fresh air flow rates. The 3 ranges are 15 to 50 m /h, 50 ...
  • Page 29 5 - INSTALLATION AND CONNECTIONS Installation of the coil WARNING: ■ We cannot be held liable for damage to valves caused by We  recommend  a  minimum  tightening  torque  of  7  N.m  (max.  faulty design of the hydraulic supply network or incorrect 18 N.m) to avoid any damage to the couplings and the exchanger.

  • Page 30: Electrical Connections

    Table of actual flow rates for the pump connected to a PVC pipe  with an internal diameter of 6 mm. 5.5.1 - General conditions for electrical installation The unit must be installed in accordance with the requirements  Sizes 42NX 2, 3 and 4: Water flow rate in litres per hour (-15% / +20%) below: Pump performance: Water flow rate in litres per hour (-15% / +20%) a)  It is obligatory to disconnect all power supplies to the unit and ...
  • Page 31 Protection by type GG fuses or a circuit breaker. Its maximum diameter must be 12 mm. It must be clamped at  With Elec. Heater Without electric low speed with a torque not exceeding 0.8 Nm. heater 500W 1000W k)  If a CARRIER digital controller is used, the power supply cable  42NX 2 must be secured using the tie provided. A routing is provided  42NX 3 for it in the plastic box. 42NX 4 l)  It  is  recommended  that  the  communication  bus  cabling  is  42NX 5 physically separated from the power supply cabling to avoid  any interference with the connecting cables.
  • Page 32 5.5.7 - Motor actuation with the electric heaters. Connecting the unit to an air flow circuit alters its performance.  The user must ensure that the minimum air flow rates indicated  below are respected: Minimum air flow rates I, Y and H plenum versions Compact U plenum version 500 W 1000 W 500 W 1000 W 42NX 1 Temporarily unavailable 42NX 2 175 m³/h 490 m³/h 140 m³/h 240 m³/h 42NX 3 135 m³/h 170 m³/h 160 m³/h 148 m³/h...

  • Page 33: Servicing And Maintenance

    The filter should never be cleaned using water or detergent products, which could cause the spread of bacteria. 6.1.1 - Access to the filter Suspended ceiling / Raised floor 42NX 2, 3 and 4 (figure 19 and 20) ■ Mark the two quick locks on the filter access hatch (a).

  • Page 34: Testing & Warranty

    7 - TESTING & WARRANTY All our units are tested and approved before leaving the factory. They are guaranteed against all manufacturing defects. The manufacturer shall not be held liable for any type of corrosion. The unit  warranty does not cover damage resulting from incorrect electrical connection, inadequate electrical or thermal protection or failure to  use a filter. 8 - END OF LIFE Safety considerations relating to final shut-down Shut off the energy sources to the units before disassembly.  Respect the local environmental laws and regulations. Presence of waste electrical and electronic equipment (WEEE) At the end of its life, this equipment must be disassembled and contaminated fluids removed by professionals and processed via  approved channels for electrical and electronic equipment (WEEE). ■ Check whether any part of the unit can be recycled for another purpose. ■ Sort the components according to their material for recycling or disposal, in accordance with regulations in force. Materials to be recovered for recycling - Steel - Copper - Brass - Aluminium - Plastics - Insulation. The proportions of materials for each unit are listed in the Product Environmental Profile (PEP) available at the following website: à  https://register.pep-ecopassport.org/pep/or on request from our departments. Any contaminated fluids must be disposed of by specialist professionals.

  • Page 35: Regulations

    9 - REGULATIONS EU Declaration of Conformity This unit complies with the provisions of the following European directives: ■ 2014/35/EU (LVD) ■ 2014/30/EU (EMC) ■ 2011/65/EU (RoHS) ■ 2009/125/EC (Ecodesign) and regulation 327/2011/EU And complies with the following standards: ■ EN 60335-2-40 and EN 60335-1 (safety of electrical appliances). ■ EN 61000-6-3 (Emission), EN 61000-6-1 (Immunity) (Electromagnetic Compatibility). The unit's compliance with the above standards does not guarantee the compliance of the installation as a whole (several other factors  not relating to the unit may be involved). As a result, the installer must observe the applicable recommendations in order to guarantee  compliance.
  • Page 36 Please contact your sales representative for more information. Order No.: EN7656390-00, 10.2024. Supersedes order No.: New. Carrier, Rte de Thil - 01120 Montluel, France. The manufacturer reserves the right to change the product specifications without notice. Printed in the European Union.