42LSA12 Console Underceiling Indoor Unit

Product Information

The Console Underceiling is a cooling and heating unit
manufactured by CARRIER. It is designed for installation and
maintenance by authorized and properly trained installers. The unit
comes in various capacities ranging from 12,000 BTU/h to 60,000
BTU/h. It can be controlled using either a wired or wireless remote
control. The nominal frequency options are 6 – 60 Hz or 5 – 50 Hz,
and the nominal tension is 208/230V.

Product Usage Instructions

1. Installation: Only authorized staff trained by CARRIER should
   install the Console Underceiling unit. Follow the installation
   procedures outlined in the manual to ensure proper setup.

2. Maintenance: Authorized personnel should conduct any repairs or
   services to the unit. Do not attempt to perform maintenance if you
   are not authorized or properly trained.

3. Safety Precautions: Always observe safety warnings and wear
   appropriate personal protective equipment when working with the
   unit. Keep a fire extinguisher nearby and regularly check its
   condition. Turn off the power supply before working on the
   unit.

4. Reception and Inspection: Do not remove the unit’s packing
   until it has reached the installation site. Handle the unit
   carefully to avoid damages during transportation. Lift and carry
   the unit by holding onto the metal parts, not the plastic side
   parts.

5. Transportation: Do not shake the outdoor unit during
   transportation and avoid inclining it more than 15 degrees
   vertically. Take precautions to prevent labor accidents and
   promptly move the unit to the installation site or a safe
   place.

If you require additional information or have any questions,
please contact us.

Console Underceiling

4
Installation and Service Manual 42 LS
ENGLISH/ESPAÑOL NOTA : Las Instrucciones en Español Empiezan en la Página 20.

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1. INTRODUCTION
This manual is addressed to CARRIER authorized and properly trained installers with the purpose of helping in installation and maintenance procedures.
It is important to stress that any repairs or services can be dangerous if accomplished by unauthorized personnel. Only authorized staff trained by CARRIER should install, start up and give any maintenance to the equipment mentioned on this manual.
If after the reading, shall you still need additional information just get in contact with us!

2. NOMENCLATURE

42 LS A 18 22 6 C W

EVAPORATING UNIT

CONSOLE MODULE & UNDERCEILING UNIT

INDENTIFICATION IN THE PROJECT CHANGES (VERSION)

12 = 12.000 BTU/h 24 = 24.000 BTU/h 36 = 36.000 BTU/h 48 = 48.000 BTU/h

18 = 18.000 BTU/h 30 = 30.000 BTU/h 42 = 42.000 BTU/h 60 = 60.000 BTU/h

WS – WIRED REMOTE CONTROL .

WITH AIR SWEEP

.

W – WIRED REMOTE CONTROL L

L – WIRELESS REMOTE CONTROL

C – COOLING

G

Q – COOLING AND HEATING

NOMINAL FREQUENCY 6 – 60 Hz 5 – 50 Hz

NOMINAL TENSION 22 – 208/230V

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3. SAFETY INSTRUCTIONS
The new indoor units 42 LS were projected to offer you a safe and reliable service when operated within the specifications foreseen in project.
However, due to this same conception, aspects regarding installation, start up and maintenance should be strictly observed.

WARNING

• Always maintain the fire extinguisher close to the working place. Check the extinguisher periodically to certify it is completely loaded and working perfectly.
• When working in the equipment always observe the safety warnings in the labels attached to the units.
• Always follow all the applicable norms of safety and use clothes and equipment of personal protection. Wear gloves and protection glasses when handling the units or the system refrigerant.
  WARNING
• Verify the weights and dimensions of the units (see item 13) to guarantee an appropriate and safe handling.
• Learn how to handle the oxyacetylene equipment safely. Leave the equipment in the vertical position inside the vehicle and also in the working place.
• Use dry nitrogen to pressurize and to check the system for leaks. Use a good regulator. Be careful not to exceed 200 psig of test pressure in the rotary compressors.
• Before working in any one of the units always turn off the power supply unplugging the indoor unit from the wall outlet.
• Never introduce the hands or any other object inside the units while the fan is working.
  4. RECEPTION AND INSPECTION OF THE UNITS
• To avoid damages during handling or transport, don’t remove the unit’s packing until arrive to the defined place of installation.
• Prevent strings, chains or other devices from touching the units.
  WARNING
• Never lift or carry the evaporator unit by the plastic side parts. Hold it on the metal parts, as shown on figure 1.

FIGURE 1 – HANDLING OF 42 LS UNITS.

• Observe the limit of suitable piling up indicated in the units’ packing.
• Don’t shake the outdoor unit during transportation nor incline more than 15o in the vertical.
• Avoid exposing the machine labor accidents, seeing to it that it is immediately carried to the installation site or a safe place.
• When removing the units from the package and removing the expanded polystyrene protections don’t discard them immediately because they may be useful eventually as protection against dust, or other noxious agents until the building and/or installation is complete and system ready to operate.
  5. INSTALLATION
  5.1 USEFUL TIPS
  First, consult the norms or codes applicable to the installation of the equipment in the selected place, to make sure the system is in accordance to them.
  Make also a careful planning of the unit location to avoid interference with any type of existing (or planned) facilities, such as electrical installation, water piping, sewer, etc.
  Install the units so that they are free from any type of obstruction from the taking of return air or airflow.
  Choose places with enough clearance for repairs or services of any kind and also to make the piping easier(copper tubes that interconnect the units, electrical wiring and drain).
  Remember that the units should be leveled after their installation.
  Verify if the external place is free of dust or other particles that might obstruct the condenser coil.

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It is indispensable that the indoor unit possesses hydraulic line for drainage of the condenser. This hydraulic line should not have a diameter less then 1/2″ and should have, right after the exit, a siphon to guarantee a perfect fall and isolation of air. At the start up, this siphon should be filled in with water to avoid taking air from the drainage line. The drainage in the outdoor unit is indispensable only when installed in the high and causing leak risk.

5.2 BASIC PROCEDURES FOR INSTALLATION

• INDOOR UNIT 42 LS
  ò CHOICE OF LOCATION ò CHOICE OF POSITION FOR INSTALLATION
  ò HOLE IN THE WALL (Ø10cm)
  POSITION OF
  ò INTERCONNECTION PIPING
  INSTALLATION OF HYDRAULIC
  ò PIPING FOR THE DRAIN ASSEMBLY

*OUTDOOR UNIT 38RC/38RQ/38NX/38NW/38MS/38CK/ 38YC/38HC/38QC/38HD/38QD

ò CHOICE OF LOCATION
INSTALLATION OF HYDRAULIC
ò PIPING FOR THE DRAIN
ASSEMBLY

*INTERCONNECTION

CONNECTION TO
ò INTERCONNECTION PIPING ò ELECTRICAL CONNECTIONS
FINAL DETAILS

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5.3 EVAPORATING UNIT INSTALLATION 5.3.1 – GENERAL RECOMMENDATIONS

WRONG

Before installing, read this instructions carefully to get familiar with the unit’s features. Sizes and weights can be found on item 14 on this manual. The following rules apply to all installations.

CORRECT

a) Plan the units’ placement carefully to avoid occasional interference with any existing (or planned) installations, such as electrical installation, water piping, drain, etc.

b) Install the unit so that it is free from any type of obstruction on the air flow, both on the air outflow and air intake.

FIGURE 2 – EVAPORATING UNIT POSITION IN ROOM

c) Choose an installation place with enough clearance for maintenance and general repair.

d) The place should allow for the passage of piping (system pipes, electric wires and drain).

e) The unit should be leveled after installation.

WRONG

5.3.2 – POSITIONING

a) The unit should only be installed horizontally Underceiling, vertically on the floor (console mode) or on the wall (see fig. 4 and 5)

634.3

b) The unit comes with two (2) brackets for Underceiling or on the wall installation. There is also a brace for assembly of the remote control.

c) Fig. 20 indicates the positioning of the screws on the

C

brackets.

d) Install the brackets (figure 3) underceiling by using the screws, nuts and washers.

e) The unit should be positioned so as to distribute the air flow uniformly in the room.

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278

Capacity (BTU/h)

A

12 and 18.000 1000

24 and 30.000 1380

36 and 42.000 1760

48 and 60.000 2140

B
822 1202 1582 1962

C
792 1172 1552 1932

FIGURE 3 – SIZES FOR EVAPORATING UNIT INSTALLATION
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300mm MINIMUM

300mm MINIMUM

FIGURE 4 – UNDERCEILING INSTALLATION

FIGURE 5 – CONSOLE ASSEMBLY (ON THE FLOOR) SEE DETAIL A

DETAIL A SCALE 1:4

FIGURE 6 – BRACKET ASSEMBLY

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5.3.3 – CONDENSATE DRAIN According to the type of installation (console or under
ceiling), there are two positions on the side plastic parts where the drain and interconnection pipes must pass through. The following picture shows where the cover must be broken.
CONSOLE MODE

FIGURE 9 – INEFFECTIVE DRAINING SCENARIO

UNDERCEILING MODE
FIGURE 7 – POSITION WHERE COVERS MUST BE BROKEN
a) Make sure that the unit is leveled, with a slight slant towards the drain so as to assure a proper draining.
b) Connect the 1/2″ PVC piping to the drain connection (Figure 8).
c) The unit uses drain by gravity. The drain pipes should have declivity, though. Avoid scenarios like the ones indicated on Fig. 9.

WARNING
When connecting the PVC hose to the machine, do not do it with sudden movements or too much force, as this may cause leaks. If necessary, heat the PVC before connecting it or use a flexible hose.

FIGURE 8

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6. INTERCONNECTION PIPING
6.1. SUSPENSION AND FIXATION OF INTERCONNECTION PIPES
Always try to fasten the interconnection piping in a convenient way through brackets or porches, preferably both together.
Seal them with circular neoprene bushing and then pass finish ribbon around.
Test all the welded and flared connections looking for leaks (maximum tested pressure: 200 psig). Use pressure regulator in the Nitrogen cylinder. If necessary, pass the electric interconnection by the copper tube, as shown on Figure 10.

LIQUID LINE
TAPE

ELECTRICAL INTERCONNECTION DUCT (OPTIONAL)
SUCTION LINE
ISOLATION

6.2. EVACUATION OF INTERCONNECTION PIPING

TUBES

ISOLATION

The outdoor unit is shipped with enough refrigerant charge for use in a system with interconnection piping up to 3m, that is, charge for the outdoor unit, charge for the indoor unit and the necessary charge for an interconnection piping up to 3m. Since the interconnection pipes are provided in the field, you should proceed with the evacuation of the lines and of the indoor unit. The access points are the service valves close to the outdoor unit.
The valves come shut from the plant to retain the refrigerant in the outdoor unit.
To do the evacuation, maintain the valve shut and connect one side of the manifold hose to the vent’s valve and the other to the vacuum pump. It is recommended to proceed the evacuation through both connections of the service valves simultaneously. The range to be reached should stay between 250 and 500 microns.
OBS: After doing the evacuation, add positive pressure with R-22 so that the vacuum is broken (see fig. 4).

TAPE
FIGURE 10 – INTERCONNECTION PIPES
To proceed with the refrigerant charge, just maintain the service valve in the original position (shut) and connect the manifold hose to the vent (valve Schrader) of the service valve.
OBS: Do not forget to purge the air from the hose. WARNING

For all the necessary information about diameter, charge and connections, see topics 14 and 15.

Before turning on the equipment and after completing the refrigerant charge (if necessary), open the service valves close to the outdoor unit.

CAUTION
Never carry liquid in the suction service valve. Whenever you want to do it, use the service valve of the liquid line.

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7 – ELECTRIC INTERCONNECTIONS 7.1 – 42 LS COMMAND 220 V ELECTRIC CHART
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NEUTRAL 1 POWER

SUPPLY 220 VAC

PHASE

2

GROND 3

COMPRESSOR 4 5

RV 6

TERMINAL BLOCK

CAUTION
On condensors that operate on cooling with the reversion valve energized, the electric interconnection must be made between P9 and P10 of the Printed Circuit Board and the reversion valve.

SEE NOTE 1

WHITE BLACK

P 1
NEUTRAL P 2
PHASE

DISPLAY

DISPLAY (FOR UNITS WITH REMOTE WIRELESS CONTROL)

FAN CAPACITOR

FAN

CAPACITOR

RED

P 3

BLUE

P 4

BLACK

P 5

BLACK

P 6

ORANGE

P 7

YELLOW

P 8

FREEZE

LOW
MEDIUM FAN

HIGH COMMON

ROOM

FREEZE
ROOM SENSOR

COMPRESSOR

SEE NOTE 3

P 9

NC

SEE NOTE 2 ORANGE P 10

RV

NO

SEE NOTE 2

VIOLET

P 11

SWP
SWEEP MOTOR

BLACK BLUE

P 12 P 13
MAIN BOARD

SWEEP

(FOR UNITS WITH REMOTE WIRED CONTROL)

CAPTION – – – – LOCALLY MADE WIRING
FACTORY MADE WIRING RV – REVERSION VALVE

1 – MOTOR USED ONLY IN 36, 42, 48, 60K MACHINES 2 – USED ONLY IN QL AND QW MACHINES 3 – MOTOR USED ONLY IN QL, CWS, CL MACHINES

7.2 – 42 LS COMMAND 24 V ELECTRIC CHART
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NEUTRAL 1
POWER SUPPLY
PHASE 2 GROUND 3 COMPRESSOR 4 RETURN 5
RV 6
TERMINAL BLOCK

TFX

BLUE

WHITE
SEE NOTE 1
FAN MOTOR
CAPACITOR

WHITE

P 1

BLACK

P 2

WHITE

FAN MOTOR

CAPACITOR

RED

P 3

BLUE

P4

BLACK

P 5

BLACK

P 6

SEE NOTE 4

ORANGE

P 7

YELLOW

P 8

NEUTRAL PHASE

DISPLAY

DISPLAY (FOR UNITS WITH REMOTE WIRELESS CONTROL)

FREEZE
LOW

MEDIUM FAN

HIGH COMMON

ROOM

FREEZE
ROOM SENSOR

COMPRESSOR

SEE NOTE 4

SEE NOTE 2

VIOLET

P 9

NC

SEE NOTE 2

ORANGE P 10

RV

NO

P 11

(FOR UNITS

BLACK

P 12

SWEEP

WITH REMOTE WIRED CONTROL)

WHITE

SWP

BLUE

P 13

SEE NOTE 3

SWEEP MOTOR

MAIN BOARD

CAUTION
On condensors that operate on cooling with the reversion valve energized, the electric interconnection must be made between P9 and P10 of the Printed Circuit Board and the reversion valve.

CAPTION – – – – LOCALLY MADE WIRING
FACTORY MADE WIRING TFX – 220/24 V TRANSFORMER RV – REVERSION VALVE

1 – MOTOR USED ONLY IN 36, 42, 48, 60K MACHINES 2 – USED ONLY IN QL AND QW MACHINES 3 – MOTOR USED ONLY IN QL, CWS, CL MACHINES 4 – WHEN USING 38NX/NW/RC/RQ CONDENSERS IT IS NECESSARY TO DISCONNECT THE ORANGE CABLE(S) FROM THE TRANSFORMER AND CONNECT IT (THEM) TO TERMINAL 2 ON THE TERMINAL BLOCK

8. INITIAL START – UP

9. COOLING SYSTEM

Before turn the unit on, check the conditions above and the following items: * Verify the appropriate fixation of all the electrical
connections;

• Make sure there is no refrigerant leakage;
• Make sure the power supply is compatible with the electrical characteristics of the unit;
• Make sure the compressors can move freely on the vibration insulators of the outdoor unit;
• Make sure that all the service valves are in the correct operation position;
• Make sure the area around the outdoor unit is free of any obstruction in the taking or discharge of the airflow;

9 .1 – EXPANSION SYSTEM
The evaporator units are factory-equipped with a system for refrigerant gas expansion called piston.
As shown below, this system has a small piece with a fixed, calibrated, easily removable hole inside a nipple to connect a 3/8″ flare nut on the liquid line.
The piston application properties include a more accurate refrigerant gas flow into the evaporator compared, for instance, with the capillary system. Besides, pistons are easy to handle.
On reverse cycles (heating and cooling), the piston system requires a by-pass system, that is, two pieces are placed inside the nipple, one performing the expansion process and the other as a by-pass and vice-versa according to the gas flow direction (cooling or heating mode).

• Make sure to have a perfect drainage and no blockage in the drain’s hose of the unit;

EXPANSION DIRECTION

• When the outdoor temperature is too low, there will be a risk of freezing the indoor unit if the operation speed was adjusted to the minimum condition (cooling mode).

CAUTION
The fan motors of the units are lubricated in the plant. Dont lubricate when installing the units. Before turning on the motor, make sure the propeller or turbine fan is not loose.

BY – PASS DIRECTION

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10. MAINTENANCE

10.1 GENERALITIES CAUTION

If, however, the residual pressure is too low, a nitrogen cylinder should be connected to the system (use one of the service valves existent in the units).

Before executing any maintenance services turn off the power that feeds the unit through the indoor unit.
To avoid unnecessary repair services, check the following points carefully:

• Is the unit correctly connected to the main power, with the entire manual and/or automatic devices of control/ protection of the circuit appropriately connected, without any interruptions such as: burned fuse, open switches, etc.?
• Is the thermostat correctly adjusted for the desired conditions?
• Is the fan’s switch button in the correct position?
  10.2 PREVENTIVE MAINTENANCE

Then, pressurize the unit up to 200 psig. Depending on the method to be used, a small amount of refrigerant should be added to the system. Add refrigerant first, then the Nitrogen.
10.4.1 METHODS DETECTION

• Electronic Detector (refrigerant + Nitrogen)
  Search the leakage, passing the sensor of the unit close to the connections, welding and other possible leak points. Use low speed when moving the sensor. The equipment emits a sound or a luminous sign when passing by the leak point.

CLEANING – Clean the outdoor unit with a soft brush, if necessary use also a vacuum cleaner to remove the dirt. After this operation, use a comb for fins, upwards, in order to smooth then out. The dust accumulation obstructs and reduces the airflow resulting in capacity loss.
Clean the casings with a flannel or soft cloth soaked in warm water and neutral soap. DO NOT USE solvents, carbon tetrachloride, waxes containing solvent or alcohol to clean the plastic parts.
WIRING – Check all the cables looking for deterioration and all the electrical connections for squeeze and corrosion.
ASSEMBLAGE ­ Make sure the units are installed firmly.
CONTROLS – Make sure that all the controls are working correctly and that the units operation is normal. Vibrations can cause undesirable noises.
DRAIN – Verify blockages or creases in the drain’s hose. This can cause an overflow in the base pan and consequent leakage of the condensed water.
10.3 CORRECTIVE MAINTENANCE

• Halide – Light Detector (refrigerant + Nitrogen)
  Similar procedure to the previous one, but in this case the sensor is replaced by a hose that is connected to a flame. Upon reaching a halogen refrigerant (R11, R12, R22, etc.) this flame turns green.
  CAUTION Do not inhale the resulting gases from the refrigerant burn because they are highly toxic.
• Solution of water and soap
  Prepare a solution with soap or detergent and spread it on the connections, welds and other possible leak points.
  Wait at least 1 minute to check where a bubble may form.
  CAUTION
  When in external environment, the wind can make the search difficult. A very poor soap solution is also inadequate because it wont form bubbles.

It should be done in situations where a component

obstructs the perfect operation of one or both the units. * Method of Immersion On these occasions, it is necessary to consult the wiring

diagrams fixed in the units.

The Method of Immersion in tank could be used for

10.4 DETECTION OF LEAKAGE

inspection in separated components of the unit (especially coils). In this case, the component should be pressurized

to 200 psig.

When there is suspicion leakage on the cooling mode,

you should proceed as follows: In case there is still enough pressure of refrigerant in

WARNING

the system, you may go straight to the detection the leakage Do not mistake air bubbles between the fins for leakage.

through one of the processes indicated below.

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10.4.2 REPAIRING THE LEAKAGE
After locating the leakage, mark the place appropriately and remove the pressure of the system by eliminating the refrigerant and/or Nitrogen, which might exist.
Prepare to do the welding (use Phoscopper weld or silver weld), proceeding it with passage of Nitrogen inside the tube (during the welding and at low pressure), avoiding the formation of oxides inside the tube.
Make sure the repair was successful, pressurizing and testing the unit again.
10.5 PROCEDURE OF VACUUM AND REFRIGERANT CHARGE

remain steady either the system still contains humidity or there must be a leakage. Always verify all the connections (points 1, 3 and valves).

• High Vacuum Method
  It is applied with a vacuum pump capable to reach vacuum lower than 200 microns in only one evacuation.
  Proceed as follows: 1. Turn on the vacuum pump, then open valve 1 (fig 19). Later on, isolate the vacuum pump and open the valve. 2. When a reading lower than 200 microns is obtained (try to reach the lowest possible value), the vacuum procedure will have been completed.

10.5.1 DEHYDRATION
Every system that has been exposed to the atmosphere should be properly dehydrated. That is possible if we accomplish appropriate evacuation.
To make a proper evacuation, it is necessary to have a VACUUM PUMP (not compressor) and a vacuum gauge.
The procedure is the following: First the access points to the system must be defined. Use the service valves in the outdoor unit on both the drop and the discharge sides (liquid line). That is, high-pressure valve connected to the piping of smaller diameter and the low-pressure valve connected in the piping of larger diameter. Only then is it possible to evacuate the system.
Basically, we can do in two ways:

• Method of Dilution
  Turn on the vacuum pump and make the vacuum in the pump (valve 1 shut – fig. 18).
  Open valve 1 and let the system evacuate until it reaches at least 500 microns. To obtain the measure, close valve 1 and open valve number 2, allowing the vacuum gauge to feel the system pressure. After reaching 500 microns, isolate the vacuum pump and open valve 3, letting the Nitrogen in to break the vacuum. Isolate the Nitrogen cylinder.
  Purge the Nitrogen through the connection that links the copper passage to valve 3.
  Repeat the procedure at least twice, doing in the last stage the third evacuation.
  At the end of this process, at least 200 microns should be obtained.
  CAUTION
  Never disconnect the copper tube of valve 3; just loosen the connection to purge the Nitrogen

WARNING
The pump oil should be replaced periodically in order to guarantee the vacuum efficiency.
10.5.2 REFRIGERANT CHARGE
After evacuating the system appropriately, close the valves of the manifold and isolate the vacuum pump, the vacuum gauge and the Nitrogen cylinder.
To do the refrigerant charge, replace the Nitrogen cylinder shown in Fig. 18 with a refrigerant cylinder. Purge the hose that links the cylinder to the service valve.
Open the service valve which gives access to the refrigerant cylinder and then the high-pressure valve of the manifold.
To load the system appropriately, verify in the identification labels of the units the amount of refrigerant that should be added to the system (see item 6.4 of this manual).
Remember that the charge varies according to the interconnection piping length of the units.
With the system shut down, load the refrigerant in liquid form through the service valve of liquid line (smaller diameter).
For help, use a scale (if not using a graduate cylinder). Allow at least 10 minutes before turning the unit back on.
Close the discharge valve of the manifold, open the suction valve and with the system in operation complete the charge with refrigerant in gas form (between 5% and 20% the total). Check in the scale the refrigerant weight added to the system. When the charge is complete close the suction valve of the manifold, disconnect the suction and discharge hoses.Close the cylinder valve.
The charge procedure will be complete.

In order to obtain a precise reading of vacuum one should isolate the vacuum pump from the system. Close valve 1 and wait about 5 to have a precise measure. If the reading doesn’t

Note: The total refrigerant charge is the sum of the charges of the indoor and outdoor units plus the interconnection piping. See item 13 for estimated charge values.

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10.6 INTERNAL CLEANING OF THE SYSTEM
The burn of an electrical motor is recognized by the characteristic smell. When a motor of a hermetic compressor burns, the stator winding seal forms carbon and acid mud, in this case, clean the refrigerant circuit before installing a new compressor. Install a new capillary tube and out door condenser filter.

10.8 GENERAL CARE

• Maintain the casing and the grills as well as the area around the unit as clean as possible.
• Periodically clean the coils with a soft brush. If the fins are too dirty, use a jet of compressed air or water at low pressure in the opposite direction of the airflow. Be careful not to damage the fins.

10.7 REFRIGERANT WITHDRAWAL

• Verify the tightness of the connections, flanges and other fixations, preventing the occurrence of vibrations, leakage or noises.

If for any reason there is need to remove/lose refrigerant, the service valves of these units allow to remove refrigerant from the system into the outdoor unit.

Make sure that the insulation of the metallic parts and pipes are in the correct place and in good conditions.

Procedure:

Step 1: Connect manifold hoses to the vents of the outdoor unit service valves.

Step 2: Close the service valve of 1/4″ liquid line.

Step 3: Turn on the unit in cooling mode until that the system pressure reaches 2 psig. Then, close the service valve of the suction line 3/8 ” so that the refrigerant gas remains withdrawn.

GAS OUTFLOW FAUCET

CHARGE CYLINDER

CHARGE VIEWER

3

GAS OUTFLOWN

FAUCET

1

3
2
VACUUMMETER

VACUUM PUMP

NITROGEN CYLINDER WITH PRESSURE REGULATOR
HIGH PRESSURE MANOMETER LOW PRESSURE MANOMETER

EVAPORATOR

SUCTION LINE LIQUID LINE

CONNECTIONS

FIGURE 11 – CHART FOR OBTAINING VACUUM AND FOR REFRIGERANT CHARGING. 13

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CONDENSER

11. TROUBLESHOOTING GUIDE

Table guide of possible occurrences in the air conditioning equipment, with the possible causes and the corrections to be done.

OCCURENCE

POSSIBLE CAUSES

SOLUTIONS

Compressor and motors of the outdoor and indoor units work but the room is not efficiently refrigerated.

Thermal capacity of the unit is insufficient for the room.
Incorrect or bad installation.

Evaluate the thermal load and instruct the customer to change the unit to another model of higher capacity, if necessary.
Check the installation place observing height, location, sun rays in the outdoor unit, curtains in front of the unit etc.. Reinstall the unit.

Leakage of gas.

Detect the leakage, repair it and reset the unit.

Coil obstructed with dirt.

Remove obstructions from the indoor and outdoor units

Low operation voltage.

Voltage supplied below the minimum tension

Compressor without compression. Low fan speed. Filter and/or capillary tube obstructed. Thermostat and switch button. Service valve shut or partially shut.

Replace the compressor.
Check the capacitor phase of the fan motor and the fan motor itself, replacing it if necessary.
Replace the filter and capillary. In this case the indoor unit generally gets blocked with ice.
Adjust the thermostat and the switch correctly, according to instructions of the owners guide.
Open the valve(s).

Compressor doesnt Power cord unplugged or with bad

work

contact.

Low or high voltage.

Defective switch button/remote control.
Defective Thermostat.
Blocked compressor.

Overloaded circuit causing a breakdown on tension.
Excess of refrigerant.
Defective thermal protector of the compressor (open).
Incorrect electrical connections or broken wires.

Place the power cord appropriately in the power supply.
See item 7.2. An automatic stabilizer with potency in Watts appropriate for the unit can be used.
Use an ohmmeter to detect the defect. If necessary, change the switch button/remote control.
Replace the thermal protector.
Proceed the compressors start up, according to instructions in the Service Manual of the Training Section (AT-MS-B-03/89), in case it doesnt work, replace it.
The unit should be connected to an exclusive wall receptacle.
Check it and purge if necessary.
Replace the thermal protector.
Check the wiring, repair or replace it. See the units wiring diagram.

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OCCURENCE
Fan motors dont work

POSSIBLE CAUSES
Power cord unplugged or with bad contact.
Defective fan motor.

Defective Capacitor.

Defective switch button/remote control.

Compressor doesnt operate on heating mode

Incorrect electrical connections or broken wires.
Propeller or blower wheel loose or blocked Defective solenoid of reversing valve (burned).
Defective defrost thermostat (open).

SOLUTIONS
Place power cord appropriately in the power supply.
Proceed the direct start up of the fan motor, in case it doesnt work, replace it. Use an ohmmeter to detect the defect and if necessary, change the capacitor. Use an ohmmeter to detect the defect, if necessary change the switch button/remote control. Check the wiring, repair or replace it. See the units wiring diagram. Check, fastening it correctly.
Replace the solenoid.
Replace the reversing valve.

Defective switch button/remote control. Incorrect connections or broken wires. Thermostat button settled on cooling.

Use an ohmmeter to detect the defect. If necessary, change the switch button/remote control.
Check the wiring, repair or replace it. See the units wiring diagram.
Adjust the thermostat correctly.

Evaporator bloked by ice.
Excessive noise during the operation.

Bloked piston.

Start the unit again, opening the nipple. It is advisable to clean the components with liquid R22 or R-11 jets.

Leakage of gas.

Eliminate the leakage and change all the refrigerant.

Gaps in the axis/bearings of the fan motors.
Vibrating piping.
Loose parts.

Replace the fan motor.
Check the place where the noise comes from and eliminate it. Check and wedge or fix them correctly.

Broken internal suspensions spring of Replace the compressor. compressor.

Propeller or blower wheel uneven or broken.

Replace it.

Incorrect installation. Normal.

Improve installation (reinforce the pieces that have fragile structure).
Teach the customer.

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12. SCHEDULE OF PREVENTIVE MAINTENANCE

ITEM

SERVICES DE SCRIPTION

General inspection in the equipment installation, short circulation of air, distribution

1º

of the airflow of the units, blockage in the entrance and exit of air from the outdoor

unit, exposure to thermal load.

2º Check electrical installation.

3º Wash and dry the air filter.

4º Measure tension and operation current and compare then to the nominal one.

5º

Measure tension with blocked rotor and watch for tension decrease till the protector turns off.

6º

Check tightness of all the electrical terminals of the units, avoiding possible bad contacts.

7º

Check dirt obstruction and kneaded fins.

8º

Check possible blockages or creases in the drain hose.

9º

Clean of the casings.

10º Measure temperature differentia.

11º Check for gaps in the axis of the electrical motors.

12º Check positioning, fixation and evening of the propeller or blower wheel.

13º Check thermostat operation, switch button.

14º Measure balance pressures

15º Measure operation pressures

Frequency code: A – monthly B – quartely C – twice a year

FREQUENCY ABC

16

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13. TECHNICAL FEATURES

MODELS
NOMINAL CAPACITY

(BTU/h)

42LSA12 12000

SUPPLY

(V-Ph-Hz)

208/230-1-60

FULL CHARGE

CURRENT MOTOR

0,6

FULL CHARGE

CURRENT MOTOR

100

START-UP CURRENT MOTOR

BREAKER REFRIGERANT EXPANSION SYSTEM (PISTON) NET WEIGHT (KG) SIZES 42 (mm) LxAxP DRAIN DIAMETER (IN)

FAN FINS

TYPE QUANTITY OUTFLOW (m3/h) SURFACE AREA (m²)

ND 10

41 COOLING/HP 16,5

1000 X635 X265
02 578 0,18

42LSA18 18000
208/230-1-60
0,7

42LSA24 24000
208/230-1-60
0,83

130

160

1,31

1,48

15

15

R – 22

52 COOLING & 45 HP # 52 COOLING & 51 HP

22

28,5

1000 X 635 X 265

1380 X 635 X 265

1/2

CENTRIFUGAL

02

02

850

1215

0,18

0,28

42LSA30 30000
208/230-1-60 0,79
160
1,57 20

61 COOLING/HP 28,5

1380 X 635 X 265
02 1255 0,28

MODELS
NOMINAL CAPACITY

(BTU/h)

SUPPLY

(V-Ph-Hz)

FULL CHARGE CURRENT MOTOR

FULL CHARGE CURRENT

MOTOR

START-UP CURRENT

MOTOR

BREAKER

REFRIGERANT

EXPANSION SYSTEM (PISTON)

NET WEIGHT (KG)

SIZES 42 (mm) LxAxP

DRAIN DIAMETER (IN)

TYPE

FAN

QUANTITY

OUTFLOW (m3/h)

FINS

SURFACE AREA (m2)

42LSA36 36000
208/230-1-60 1,5
320
1,9 20

68 COOLING/HP 39,5

1760 X635 X265
04 1761 0,38

42LSA42 42000
208/230-1-60
1,7

42LSA48 48000
208/230-1-60
1,7

42LSA60 60000
208/230-1-60
1,7

360

360

300

ND

2,62

2,62

25

25

ND

R – 22

74 COOLING & 72 HP # 81 COOLING & 78 HP # 88 COOLING & 84 HP

39,5

47

47

1760 X 635 X 265

2140 X 635 X 265

1/2

2140 X 635 X 265

CENTRIFUGAL

04 1827 0,38

04 2167,5
0,47

04 2167,5
0,47

14. GENERAL INSTALLATION TIPS

CAPACITY BTU/h

SUCTION CONNECTIONS DIAMETER
42LS

12K

1/2

18K

5/8

24K

5/8

30K

3/4

36K

3/4

42K

7/8

48K

7/8

60K

7/8

• FOR GREATER LENGTHS THAN THE INDICATED ONES, CONSULT CARRIER.

• UNITS AND EVAPORATORS HAVE FLARE-NUT TYPE VALVES. 17

LIQUID CONNECTIONS DIAMETER
42LS 3/8 3/8 3/8 3/8 3/8 3/8 3/8 3/8

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