Carrier 42XQ Series Instructions and recipes

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42XQ : Cooling only direct expansion Fan Coil Unit (Wireless Remote Control)
42XQA : Cooling only direct expansion Fan Coil Unit (Wired Remote Control)
INSTALLATION AND
START-UP INSTRUCTIONS
UNDERCEILING/CONSOLE FAN COIL UNIT
42XQ/XQA
50/60Hz
®
Carrier
International
Sdn. Bhd.
Malaysia
42XQ 42XQA
MODEL W (mm) D (mm) H (mm) Weight (kg)
42XQ/XQA 020/004* 23
42XQ/XQA 025/006* 1020 23.5
42XQ/XQA 030/007*/008* 26.1
42XQ/XQA 040/010* 1200 625 232 27.2
42XQ/XQA 050/012* 37.6
42XQ/XQA 060/014* 1650 40.1
*Model code for Thailand market only (50Hz)

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CONTENTS
1-Introduction................................................................................................................ 3
2-Safety Instructions..................................................................................................... 3
2.1 - Capacity Label.................................................................................................. 3
3-Receiving and Inspecting the Units............................................................................ 4
4-Installation
4.1 - General Recommendations...............................................................................5
4.2 - Basic Installation Procedures............................................................................ 5
4.3 - Installing the Indoor Units..................................................................................6
5-Interconnection Pipes
5.1 - Suspending and Mounting the Interconnection Pipes......................................11
5.2 - Evacuating the Interconnection Pipes..............................................................11
5.3 - Adjusting the Gas Load................................................................................... 12
5.4 - Gap Between the Units....................................................................................13
5.5 - Interconnection Junctions................................................................................13
6-Expansion System....................................................................................................15
7-Electrical Installation and Diagrams
7.1 - Instructions for the Electrical Installation of the Equipment..............................16
7.2 - Electrical Box 42XQ.........................................................................................16
7.3 - Changing the Wireless Remote Control to a Wired Remote Control................17
7.4 - Electrical Diagram for Indoor Unit (220-240V output signal to compressor) ... 20
7.5 - Electrical Diagram for Indoor Unit (24V output signal to compressor)..............21
7.6 - Electrical Diagram and Cold-Cycle Interconnection Diagram
(50Hz Cooling only).........................................................................................22
8-Configuring the System
8.1 - Changing the Configuration of the Unit from Underceiling to Console.............23
8.2 - Positioning the Air Deflectors According to Console or
Underceiling Configuration.............................................................................. 23
8.3 - Configuring the Unit........................................................................................ 24
8.4 - Configuring the Wireless Remote Control....................................................... 25
8.5 - Configuring the Wired Remote Control (CRC).................................................26
8.6 - Function Test...................................................................................................28
8.7 - Selecting the Addresses of the Units.............................................................. 29
8.8 - Emergency Operation..................................................................................... 29
8.9 - Error Codes.................................................................................................... 30
9-Initial Start-up........................................................................................................... 31

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This manual is intended for technicians in the network of accredited Carrier
installers, who are appropriately trained and qualified, to assist them with installation and
maintenance procedure. It must be stressed that any repair or servicing work may be dangerous
if it is performed by unauthorized persons. Only professionals accredited and trained technical
personnel may install, start-up and perform any maintenance on the equipment discussed in
this manual. Please contact the nearest Carrier representatives if you still need additional
information after reading this manual!
The new indoor units in conjunction with the outdoor units have been designed to offer safe
and reliable service if operated within the specifications dictated for the project. However,
due to this design, the issues relating to the installation, initial start-up and maintenance
must be rigorously observed.
1INTRODUCTION
2SAFETY INTRODUCTIONS
•Always keep a fire extinguisher close
to the working location. Check the
extinguisher periodically to verify that it is
completely full and work perfectly.
•Whenever working on the equipment,
always pay attention to all safety notices
written on the labels attached to the units.
• Always follow all the applicable safety
standards and use personal clothing and
equipment. Wear gloves and protective
goggles whenever handling the units or the
refrigerant of the system.
•Check the weights and dimensions of the
units to ensure appropriate and safe
handling.
ATTENTION !!!
•Learn to use oxyacetylene equipment
safely. Leave the equipment in a ertical
position inside the vehicle and also at the
job site.
•Use dry nitrogen to pressurize and check
for leaks in the system. Use a good
regulator. Take care not to exceed 200
psig of testing pressure in the rotating.
•Before performing work on any of the units,
always disconnect the pressure feed.
•Never insert your hands or any object into
the units when the fan is running.
ATTENTION !!!
2.1 Capacity Label
The capacity label is located inside the indoor unit. In addition to the model and serial number,
this label provides technical data about the indoor unit, such as: voltage, frequency, phase,
refrigeration capacity, power consumption and current.

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•To prevent damage during movement or transportation, do not remove the units from their
packaging until they arrive at the final installation location.
•Prevent ropes, chains or other equipment from leaning on the units.
•Respect the stacking limits indicated on the packaging of the units.
•Do not swing the outdoor unit during transportation or tilt it at more than 15oto the vertical
plane.
•To retain the guarantee, prevent the units from being exposed to possible work accidents,
and arrange for their immediate transfer to the place of installation or another safe location.
•When unpacking the units and removing the protective expanded polystyrene (isopor)
packaging, do not throw away this polystyrene immediately, because they may be used as
protection against dust or other harmful agents until the work and/ or installation is complete
and the system is ready to be brought into operation.
3RECEIVING AND INSPECTING THE UNITS
ATTENTION !!!
Never hang or load the indoor unit by the plastic sides.
Secure it to the metal parts as shown in Figure 2.
Fig. 2 - Handling the indoor unit

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First of all, consult the applicable standards or regulatory codes for installing the equipment
in the selected location to ensure that the envisages system is compliant with these standards
and regulations.
In addition, prepare a careful plan of the positions of the units to prevent possible interference
with any kind of pre-existing (or scheduled) equipment or facilities, such as electrical
installations, water mains, sewerage systems, etc.
Install the units so that they are free of any kind of obstructions of the air intakes or air
discharges.
Select locations equipped with access spaces to facilitate different types of repairs or servicing
work and to leave room for the routine of pipes (copper pipes which interconnect the units,
electrical wiring and drainage).
Check that the external location is free of dust or other suspended particulate matter which
could possibly obstruct the vanes of the outdoor unit.
It is essential for the indoor unit to posses a hydraulic line to drain off the condensate.
This hydraulic line must have a diameter of no less than 3/4" and, after the discharge, must
posses a siphon to guarantee the perfect capture and sealing of the air. During the initial
start-up, this siphon must be prefilled with water to prevent air being suctioned from the
drainage pipe.
Draining the outdoor unit only becomes necessary when it is installed in a high position and
constitute a dripping risk.
4INSTALLATION
4.1 General Recommendations
4.2 Basic Installation Procedures
INDOOR UNIT
Selection of the location
OUTDOOR UNIT
Selection of the location
Selection of the installation profile
Drilling the wall - Ceiling/Positioning
Positioning of the interconnection pipes
Installation of the drain pipes
Assembly
Installation of the drain pipes
Assembly
Connection the interconnection pipes
Electrical Interconnection
Final Finishing
INTERCONNECTION

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Before performing the installation, read these instructions carefully to ensure that you are
familiar with the specifications of the unit.
The dimensions and weight of the unit can be found in the cover page.
The rules presented below are applicable to all installations:
a) Prepare a careful plan of the positions of the units to prevent possible interference with
any kind of pre-existing (or scheduled) equipment or facilities, such as electrical installations,
water mains, sewerage systems, etc.
b) Install the unit where it is free of any kind of obstruction of the air circulation, both in the air
intake and the air discharge.
c) Select a location with sufficient space to permit repairs and general maintenance work.
d) The location must permit the routing of the pipes (system pipes, electrical wiring and
drainage).
e) The unit must be level after installation.
4.3 Installing the Indoor Units
4.3.1 GENERAL RECOMMENDATIONS
Fig. 4 - Dimensions of the Indoor Unit
Dimensions (mm)
Model No. X Y Z
42XQ/XQA 020, 025 & 004*, 006* 1020 934 964
42XQ/XQA 030, 040 & 007*, 008*, 010* 1200 1114 1144
42XQ/XQA 050, 060 & 012*, 014* 1650 1564 1594
*Model code for Thailand market only (50Hz)

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a) The unit must only be installed at the
following positions: Horizontal under the
ceiling, vertical on the wall. (See Fig. 5
and 6).
b) The unit’s position must permit the
uniform circulation of air throughout
the entire environment (Fig. 7).
c) The indoor unit comes factory supplied with
(2) fixation support for installing it
suspended from the ceiling or fixed to the
adjacent wall (Fig. 8).
4.3.2 PLACEMENT AT THE LOCATION
NOTE
To fix the indoor unit in place, it is necessary
to remove its side covers as described in
subsection 4.3.3.
d) Fig. 8 indicates the position of the
supports. Install the fixation supports in
the ceiling using assembly screws, nuts
and washers.
Fig. 5 - Underceiling assembly
NOTE
Avoid placing the indoor unit in locations in
the vicinity of obstacle to the airflow which is
necessary for the correct functioning of the
equipment.
Fig. 6 - Wall assembly (console)
Fig. 7 - Position of the indoor unit in the environment
Fig. 8 - Supports and drilling for fixation

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•Fig. 9 shows the position of the screws to be removed to disassemble the plastic
sides of the indoor unit.
•To access the two screws indicated by the number , it is necessary to remove the air
filters from the ends.
•To access the screw shown in the detail (present on both sides), with the number , it is
necessary to lift up the horizontal deflector.
•The right side gives access to the connections of the suction, expansion and drainage
pipes, whereas the left side gives access to the electrical box and the electrical connections.
4.3.3 REMOVING THE SIDES
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Fig. 10 shows the position of the screws to be removed to disassemble the grilles which
gives access to the ventilation system assembly.
Before removing the grilles, it is necessary to remove the side covers first. Then remove the
filters and the three screws which hold the upper part of each grilles - indicated by the
number on the illustration. The lower part of the grilles is only slotted into the indoor unit.
Fig. 9 - Position of the screws for side removal
4.3.4 REMOVING THE GRILLES
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Fig. 10 - Position of screws for grille removal

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Depending on whether the unit is installed on the wall (console) or ceiling (underceiling), the
pipes for draining off the condensate and also the interconnection pipes must be routed
differently.
Fig. 11, 12 and 13 show the installations on the wall and ceiling and where these pipes must
be routed, as well as where it is necessary to break the indentation in the right-hand side
cover of the indoor unit.
4.3.5 DRAINING OF THE CONDENSATE
Fig. 11 - Drainage pipes for underceiling assembly
NOTE
Insulate the drainage pipe to a minimum
thickness of 5mm to prevent
into the device.
Fig. 13 - Indentations for pipe discharge
Fig. 12 - Drainage pipes for wall assembly

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To guarantee efficient drainage:
a) Ensure that the unit is level, with a
slight inclination towards the drainage
side - approximately 2o(Fig. 14).
b) The unit uses gravity drainage. However,
the drainage pipe must have a downward
slope. Avoid the situation shown in
Fig. 15.
Fig. 14 - Drainage inclination
Fig. 15 - Inefficient drainage scenarios