Carrier FDT21 User manual

DUCTED TYPE SPLIT SYSTEMS
(3 Phase, Fixed Speed)
FDT21
FDT25
Read this operating & installation instruction carefully and keep it for future reference
Capacity Range : 21 to 25 Kw.
Available with Zone Remote Controller
OPERATION
&
INSTALLAT I O N
MANUAL
DUCTED TYPE SPLIT SYSTEM HEAT PUMP

2
CONTENTS
OPERATION INSTRUCTIONS
Preface................................................................................................................... 3
1. Part name and their function.................................................................................. 4
2. How to use the remote control............................................................................... 5-8
3. Maintenance........................................................................................................... 9-10
4. Operating Guide & Precautions..............................................................................11
INSTALLATION INSTRUCTIONS
5. Checking before contacting the service provider................................................... 12
6. Indoor Unit Installation........................................................................................... 13
7. Outdoor Unit Installation........................................................................................ 14-15
8. Pipe Preparation.................................................................................................... 16
9. Piping length and The Elevation............................................................................ 17
10. Piping Connection.................................................................................................. 18
11. Air Purging and Check for Pipe Leakage............................................................... 19
12.Wiring Diagram...................................................................................................... 20
13. Refrigerant Pipe and Drain Pipe............................................................................ 21
14. Test Running......................................................................................................... 22

3
Checking Product Received
Upon receiving your unit, please inspect for damage. Claims for damage should be reported
immediately to the transportation company. Check that the unit is correct against your order. In
the event an incorrect unit is delivered, it must be returned to the supplier and must NOT be installed.
The manufacturer assumes no responsibility for installation of incorrectly delivered units.
Before Installation
Read all instructions carefully prior to installation. Please ensure every step described in this manual is
understood and taken into account before starting installation.
Proper installation will help ensure trouble free operation. Improper installation may result in problems
such as noisy operation, compressor damage, improper operation or dangerous conditions that could
result in injury or property damage and this could also void the warranty.
Overcurrent Protection
Overcurrent protection which is less than the recommendation could result in unnecessary fuse failure
and chargeable service call. The manufacturer bears no responsibility for damage caused to the
equipment as a result of deviation from the recommended rating.
Refrigerant tubing
Keep refrigerant tubing clean and dry prior to and during installation to avoid equipment damage.
Homeowner
The user should retain this manual for future reference. To ensure the warranty is continued
and valid, the unit shall be required to be serviced as per section on “REGULAR/ PREVENTIVE
MAINTENANCE”. Attention should be given to the air inlet side of the outdoor coil to ensure that
leaves, grass and etc are not being drawn into the unit. Restriction to air flow across the coil will
reduce the system capacity or result in high operating pressures and excessive operating cost. There
must be air filters installed in the system at some point upstream to the indoor unit. Air filters should
be inspected at least once a month.
Your air conditioner is designed and built with reliable components to provide years of trouble free
dependable service. However, it will require regular maintenance either by yourself (end user)
or a licensed technician to keep your warranty on the unit valid.
Important
The Australian greenhouse office has issued various regulations on the use and disposal of refrigerants
in this unit. Failure to follow these regulations may harm the environment and could lead to the
imposition of substantial fines.
Only qualified and licensed technician should perform work on this unit, otherwise the warranty on the unit
will be void.

4
PART NAMES AND THEIR FUNCTIONS
Wired Remote
Control
OPERATION INSTRUCTIONS

5
WIRED REMOTE CONTROLLER
1). BASIC FUNCTION:
The following features can be operated by buttons on the Display unit.
Pressing button will turn the air conditioner on or off. When turned on, it will operate
according to the setting shown on the Display unit. The Zone Indicators
on the Display unit will show the zones being opened.
FAN
AUTO MODE :
When the fan speed is put in auto speed, the speed will be adjusted automatically according to
the difference between the room temperature and setting temperature.
If the difference is 3ºC or more, the speed is high.
If the difference is 2ºC, the speed is medium.
If the difference is 1ºC or less, the speed is low.
NOTE : The FAN button can not be used in DRY mode.
NOTE : 7 day program only for 4 Zone control.
AB C D
Press button to set fan speed low, medium, high or auto).
Auto Low Medium High
HOW TO USE THE REMOTE CONTROL OPERATION INSTRUCTIONS
5

6
The setting temperature can be set in the range of 18-30ºC by pressing TEMPor TEMP
button. The LCD on the Display unit will show the setting temperature.
TEMP
TEMP
MODE
OPERATING MODE
By pressing MODE button, the air conditioner can be put in one of the 5 operating modes
(fan, cool, dry, heat, auto).
1. Fan Mode: The system will operate as Fan only. The SLEEP, TEMP and TEMP buttons
are not used.
2. Cool Mode: The system will operate as the cooling unit. The room sensor for cool mode is located
at the return air near the indoor coil.
3. Dry Mode: The system will operate as the Dehumidifier. In dehumidifying, the temperature will be
reduced. An indoor unit will operate intermittently in the cool mode and an outdoor unit
4. Heat Mode: The system will operate as the heat pump by switching on the reversing valve relay.
The room sensor for heat mode is located at the display touch pad.
5. Auto Mode: The system will operate in either Cool mode or Heat mode automatically depending
upon the room temp and set temp. At this mode, sing “Cool” and “Heat” will appear
However, the compressor is subjected to 3-minute delay protection each time it stops.
will stop operating intermittently.
However, the compressor is subjected to 3-minute delay protection each time it stops.
simultaneously on the display screen.
HOW TO USE THE REMOTE CONTROL OPERATION INSTRUCTIONS

7
The enhanced features that the user has to go into menu window. Press MENU button to display the menu.
NOTE : To exit is to press
CLOCK SETTING
To set the clock is by
Move cursor to position and then press MENU button.
Pressor button for Hour setting.
Useor button to enter into Minute setting and then press or button for setting.
Use button to enter into Day setting and then press or button for setting.
Press MENU button to confirm.
Press button to exit.
NOTE :If Timer on/off is set, there will be no Clock display.
TIMER ON
Move cursor to ON position and then press MENU button.
Pressor button for Hour setting.
Useor button to enter into Minute setting and then press or button for setting.
Press MENU button to confirm.
Press MENU button to confirm.
Press button to exit.
button to exit.
NOTE : To cancel is by pressing POWER button while in this setting mode.
TIMER OFF
Move cursor to position and then press MENU button.
Pressor button for Hour setting.
Useor button to enter into Minute setting and then press or button for setting.
Press
NOTE : To cancel is by press POWER button while in this setting mode.
OFF
2). ENHANCED FEATURES :
ON OFF ZONE 7 DAY
ZONE CONTROL
To turn on/off the zone dampers is to
Move cursor to zone position and then press MENU button.
Press A or B button (in case of 2 zone control) or A or B or C or D button (in case of 4 zone control)
NOTE : By pressing & holding MENU button for 2 second the system will enter to ZONE mode immediately.
to turn on/off any particular zone(S),Display shows the active zone(S).
Press MENU button to confirm.
Press button to exit.
HOW TO USE THE REMOTE CONTROL OPERATION INSTRUCTIONS

8
The system can be programmed to turn on/off on 5 , 2 or 7 day basis.
Move cursor to 7 DAY position and then press MENU button.
Use or button to select 5, 2 or 7 day setting and then press MENU button.
5 day setting (Mon - Fri) 2 day setting (Sat - Sun)
7 day setting (Mon - Sun)
7 Day program (For 4 Zone Control Only)
Note : -If 7 Day program's Timer on/off is set, the LCD show "7 DAY".
-To override press button and hold for 5 seconds. The LCD shows "7 DAY" in blinking.
-To deactivate the override press button and hold for 5 seconds again.
(Timer on setting): Press or button for Hour setting. (Press button to skip Timer On Setting)
Use or button to enter into Minute setting and press or
button setting.
Press MENU button to confirm setting.
(Timer off setting): Repeat step the same as timer on setting.(Press button to skip Timer Off Setting)
Press button to exit 7 day program. The LCD "7 day" will show on display.
To cancel 7 Day program:
Press MENU button.
Move cursor to 7 day position and then press MENU button.
Press MENU button again to enter into "Timer On" setting.
Press button 2-3 times to exit 7 day mode. The LCD "7 day" will disappear.
HOW TO USE THE REMOTE CONTROL OPERATION INSTRUCTIONS

9
.
31
CLEANING THE INTERNAL AIR FILTERS
SUGGESTION :
AT THE START OF THE SEASON DURING THE OFF SEASON
Before inspection and maintenance of the unit, always set the main power switch to "OFF" to cut off power supply.
Remove the air filter; clean it with a vacuum cleaner or
if it is very dirty, wash it with soap water then wipe
off until it is completely dry before reinstallation.
*To remove the air filter, consult an installer.
If the air filter is dirty, it will cause the reduction
of airflow, The unit is overloaded and
consumes 6% more of electricity. So regular
cleaning is neccessary.
Check that nothing blocks the air inlet and outlet Cut off the power supply main switch.
of indoor and outdoor units. if not using for heating.
Running the unit without an air filter can cause
malfunctions due to dirt or dust. Always install
an air filter at all times.
Check that the drainage hose is not
obstructed or clogged.
3.2 3.3
Clean the air filter and other parts.
Leave the circulation fan running for 2-3 hours
to dry out the inside of the unit.
MAINTENANCE OPERATION INSTRUCTIONS

10
MAINTENANCE SCHEDULE
Your air conditioner is designed and built with reliable components to provide years of trouble free
dependable service. To preserve your investment for many years to come it is in your interest to
ensure the unit is properly maintained and regularly services as per the schedule stated below.
Weekly Monthly Yearly
By End User
Air filter cleaning X
Air filter inspection X
Remote (battery) – if any X
By Licensed Technician
Air filter inspection X
Indoor coil X
Outdoor coil X
Refrigerant charge X
Air Filter
It is important to check air filters as per the recommendation above and replace as necessary.
Dirty air filter will not allow the correct amount of air to pass through the cooling/ heating coil,
which effectively will reduce the rated capacities, affect the refrigerant superheating and the overall
operation of your air conditioner.
Indoor Coil
When the air filter is cleaned as per recommended, the indoor coil will require minimal cleaning. The
life span of the indoor coil will be pro-longed for effective heat transfer.
Outdoor Coil
The outdoor coil is required for effective heat transfer between the air conditioner and the external
environment, if the external environment air is dirty the frequency of cleaning should be increased
from the recommendation.
Refrigerant
The refrigerant is the “blood line” of the air conditioning system, the air conditioner will work
efficiently and effectively with the correct amount of refrigerant charge. Systems that run short on
refrigerant charge may eventually cause a compressor burn out.
MAINTENANCE OPERATION INSTRUCTIONS

11
The temperature should not be set lower than what you need. This would result to increase energy cost.
Clean the air filter every week for higher efficiency.
Close windows and doors while operating the unit to prevent leakage of cooled air to save energy.
Draw close curtains or close glass windows when cooling to prevent heat load from sun light which
may cause more electricity cost.
In case of ineffective ventilation, open the window to ventilate the room air once in a while but not too
long since cooled air will be uselessly drained out.
Check electrical system (voltage and frequency). Use the proper power supply indicated on the unit to
operate the airconditioner and only fuses with specified capacity. Do not use pieces of wire instead of fuse.
Turn off the airconditioner if, while running, electricity interference occurs. If the unit is not to be used for
a long time, cut off the power supply main switch.
Do not insert objects into the air inlet or outlet when the airconditioner is running as it may cause damage
or personal injury. Also pay special attention when children are around.
Do not locate any obstacles against the air flow direction of indoor and outdoor unit. Inefficient performance
or malfunction may result.
Do not channel the air flow directly at people,especially infants, aged persons, or patients.
OPERATING GUIDE
PRECAUTIONS
4 .1
4 .2
OPERATION GUIDE & PRECAUTIONS OPERATION INSTRUCTIONS

12
No operation
breaker switch is still on.
Check if the power supply is in order.
Check if the timer switch is on.
The air conditioner runs but Check if the preset temperature is too high.
does not cool enough Check if the sunlight shines directly into the room.
Check if the door and the window are opened.
Check if there is anything obstructing the air discharge.
Check if the exhaust fan still operates.
Check if the air filter is dirty or clogged.
Vapour or mist coming out Hot air in the room mixes with cool air.
This causes vapour.
of the unit while running.
Loosened or disconnected wire between the unit andInoperative
remote control.
Check if the batteries are inserted in correct directions.
Check if the batteries are exhausted or not.
Check the following before contacting the service provider. You may find the solution to your problems.
After checking, if it still does not operate, please contact your local installer/service provider.
CAUSESMELBORP
PART NAMES AND THEIR FUNCTIONS OPERATION INSTRUCTIONS
Check if electrical wire is damaged & check if
the remote control.

13
6.1 SELECTION OF INSTALLATION 6.2 CAUTIONS FOR INSTALLATION WHERE
LOCATION. AIR CONDITIONER TROUBLE IS
LIABLE TO OCCUR.
A place where water is easily drained out.
Where it is acid base area.
A place that can handle the weight of the indoor unit.
Where there is irregular electrical supply.A place which has easy access for maintenance.
Remark: Supply & Return air dimension are F x G.
J
G
G
I
A
DC
F
F
EB
H
A B C D E F G H I J
42FDT21
42FDT25
1790 870 810 1650 440 365 1550 610 1790 1230
1990 870 810 1850 440 365 1750 610 1990 1700
MODEL
DIMENSION (mm.)
INDOOR UNIT INSTALLATION INSTALLATION INSTRUCTIONS

14
The location is sufficiently isolated so that the running
noise and the hot exhaust air do not disturb the
users or their neighbors.
Easy access to check and to maintain.
Ensure the spaces indicated by arrows from the wall,
ceiling, fence, or other obstacles.
The foundation must be solid enough to bear
the weight and vibration of the unit.
The space around the unit is adequate for
ventilation.
The location is not close to any flamable gases.
•
•
•
•
•
•
7.1 WHERE TO INSTALL OUTDOOR UNIT
CAUTION
Installation in the following places may cause problems.
If it is unavoidable to use such places, consult with your distributor or dealer.
•
place with machine oil.
•
saline place such as a place very close to a seashore.
•
place with sulphur gas.
•
place where high-frequency waves are generated by radio equipment, welder and
medical equipment.
More than120cm.
More than 30cm.
More than35cm.
More than 30cm.
More than 10cm.
OUTDOOR UNIT INSTALLATION INSTALLATION INSTRUCTIONS

15
1150
490
550
1552
192
1110
765 192
90 1462
1552
490
1150
Net Weight
Kg.
38FDT21
38FDT25
148
172
MODEL
OUTDOOR UNIT INSTALLATION INSTALLATION INSTRUCTIONS

16
Use cutting tools easily found in the market.
Measure precisely both outer & inner pipe.
Provide a little bit longer pipe than the measurement.
Clean inside of the refrigerant tube.
While reaming, the tube end must be on the top of the
reamer to prevent any dust going back into the tube.
Flare both ends of the pipe with flaring kit by fitting the
flare nut on the pipe before flaring. Set the die on the
pipe so that pipe end is 0.5 mm. above top of the die.
Check if the pipe end is even and perfectly round.
Cutting ToolRightWrong
90
90
90 Sloped Cut Rough Cut
Refrigerant Tube
Reamer
Up side
down position
0.5 mm. Flare-Kit
Refrigerant Tube
UnevenPoor Skin CrackedUneven
SlopeThickness
8.1 PIPE CUTTING
8.2 REAMING
8.3 FLARING THE PIPE END
PIPE PREPARATION INSTALLATION INSTRUCTIONS

17
-
-
Capacity is based on standard length and maximum allowance length is on the basis of reliability.
Oil trap should be installed every 10 meters.
CAUTION:
Indoor Unit
Outdoor Unit
Outdoor Unit
Indoor Unit
Indoor Unit
Outdoor Unit
Oil trap A
A
A
BBB
!
If is more than 10 m.
Pipe Size AB
(Diameter : Ø ) Piping Length Elevation
Model No.
(inch) (m) (m)
42FDT21
42FDT25
7/8” 1/2” 50 15 120
1-1/8” 1/2” 50 15 120
B
PIPING LENGTH AND THE ELEVATION INSTALLATION INSTRUCTIONS

18
10.2 CONNECTION TO THE OUTDOOR UNIT
Tighten the flare nut to the piping ports of the outdoor unit with the
same tightening method as that used for the indoor unit.
To prevent leakages pay special attention to the following points:
· Tighten the connectors using two wrenches. Take care not to
damage the pipes.
· If the tightening torque is not sufficient, there will probably be leakages. If the torque is too great, there could be leaks
because it is easy to damage the flange.
· The safest way to tighten the connection is to use a standard wrench and a torque wrench: in this case, use the following table.
Note: Connect the pipes with connector set by soldering for gas pipe size Ø7/8” - Ø1-1/8”
CONNECTING THE PIPES
CONNECTION TO THE INDOOR UNIT
·Do not remove the cap from the pipes until just before
connecting them. This is to prevent humidity or dirt from
entering the pipes.
·If a pipe is bent too many times, it will become stiff: do not
bend the same part of the pipe more than 3 times. When
unwinding the pipe, be careful not to pull it. Unroll it as
shown in the figure.
YES NO
indoor unit.
protection
caps
service
port
tap
tap
gas valve
liquid
valve
10.1
·Bend the connection pipes following the correct path.
·Remove the flare nut from the indoor unit piping
(check that here is no debris inside).
·Insert the flare nut and apply the flare at the end of
the connection pipe
·Connect the pipes using two wrenches.
Indoor Unit tubing Flare NutPipes
Wrench
Wrench
Pipe Size fastening torque (kgf*m)
1/4" 1.8 - 2.5
3/8" 3.4 - 4.2
1/2" 5.5 - 6.6
5/8" 6.3 - 8.2
3/4" 9.9 - 12.1
7/8" 9.9 - 12.1
1-1/8" 12.4 - 14.7
PIPING CONNECTION INSTALLATION INSTRUCTIONS

19
AIR PURGING
The purpose of air purging is to get rid of moisture
and air in the system, otherwise moisture and air
may cause ineffectiveness of the compressor which
directly affects the cooling and heating capacity.
After tightening the flare nuts between the indoor
and the outdoor units.
Remove a blank cap of a three-way valve by using a
torque wrench. Check if both high pressure and low
pressure valves are in closed condition.
Remove the nut of the service port.
Connect a gauge into the service port and a vacuum
pump.
Vacuum indoor unit and connecting pipe until the gauge
indicates at 30 inches mercury pressure.
Remove gauge. Tighten up the nut of the service port.
Use a hexagonal wrench to open both high pressure
and low pressure valves to the end (counter clockwise).
Tighten the blank cap of the three-way valve.
GAS LEAKING CHECK
Check leakage by apply soapsuds to every
connection and inspect carefully. After checking,
wipe them off completely.
Cover indoor unit joint with pipe insulation and
plastic bands to prevent condensation at joints.
1.
PURGING BY USING VACUUM
AIR PURGING AND CHECK FOR PIPE LEAKAGE INSTALLATION INSTRUCTIONS

20
Wiring is to be done as shown in the electrical wiring diagram (Do not change the internal wiring)
Use copper conduction only.
How to tighten screw on terminal block.
1. Bare the ends of electric wire.
2. After retaining the wire, check that all the terminal screws are firmly tightened.
FDT21-FDT25
WIRING DIAGRAM INSTALLATION INSTRUCTIONS