Mars Comfort-Aire Century VCD24 SA Series User manual

Installation and Operation Manual - VCDxxSA
INSTALLATION MANUAL
Hyper Heat Single Zone
Air Handler & Condenser
Models
VCD24, 30, 36, 48, 60 SA Series
ECD8, 10, 15, 20, 25 KW Series
517.787.2100 • www.marsdelivers.com
IMPORTANT NOTE:
Read this manual carefully before
installing or operating your new
air conditioning unit. Make sure to
save this manual for future reference.
North America Products
EN
Installation Manual
Safety precutions & Installation
AIR CONDITIONER
AIR-HANDLER

Installation and Operation Manual - VCDxxSA
SAFETY PRECAUTIONS
ACCESSORIES
INDOOR UNIT INSTALLATION
REFRIGERANT PIPING CONNECTION
INSTALLATION OF ELECTRIC AUXILIARY HEAT MODULE
(ONLY FOR HEAT FUNCTION MODELS)
CONFIRMATION OF INDOOR UNIT
OUTDOOR UNIT INSTALLATION
WIRING
SPECIFICATION
AIR EVACUATION
NOTE ON ADDING REFRIGERANT
TEST RUN
02
17
21
23
27
31
43
42
44
07
06
01
Inside you’ll find many helpful hints on how to use and maintain your air conditioner properly. Just a
little preventive care on your part can save you a great deal of time and money over the life of your air
conditioner. These instructions may not cover every possible condition of use, so common sense and
attention to safety is required when installing, operating and maintaining this product.
Read this manual
INSTALLATION MANUAL
31

Installation and Operation Manual - VCDxxSA
2
WARNING
The signal word indicates a hazard with a medium level of risk which, if not avoided,
may result in death or serious injury.
CAUTION
The signal word indicates a hazard with a low degree of risk which, if not avoided,
may result in minor or moderate injury.
NOTICE
The signal word indicates important information (e.g. damage to property),
but not danger.
The following safety guidelines are intended to prevent unforeseen risks or damage from
unsafe or incorrect operation of the appliance. Please check the packaging and appliance
on arrival to make sure everything is intact to ensure safe operation. If you find any
damage, please contact the retailer or dealer. Please note modifications or alterations to
the appliance are not allowed for your safety. Unintended use may cause hazards and
loss of warranty claims.
Read these operating instructions carefully and attentively before using/commissioning the
unit and keep them in the immediate vicinity of the installation site or unit for later use!
Intended Use
Explanation of Symbols
SAFETY PRECAUTIONS
02
WARNING
This appliance is not intended for use by persons(including children) with reduced physical, sensory
or mental capabilities, or lack of experience and knowledge, unless they have been given supervision
or instruction concerning use of the appliance by a person responsible for their safety. Children
should be supervised to ensure that they do not play with the appliance.

Installation and Operation Manual - VCDxxSA
3
ELECTRICAL WARNINGS
• The product must be properly grounded at the time of installation, or electrical shock may occur.
CAUTION
• Turn off the air conditioner and disconnect the power if you are not going to use it for a long time.
• Make sure that water condensation can drain unhindered from the unit.
• Do not operate the air conditioner with wet hands. This may cause electric shock.
• Do not use device for any other purpose than its intended use.
• Do not climb onto or place objects on top of the outdoor unit.
•
•
Do not allow the air conditioner to operate for long periods of time with doors or windows open,
or if the humidity is very high.
As with any mechanical equipment, contact with sharp sheet metal edges can result in personal
injury. Take care while handling this equipment and wear gloves and protective clothing.
• All wiring must be properly arranged to ensure that the control board cover can close properly. If
the control board cover is not closed properly, it can lead to corrosion and cause the connection
points on the terminal to heat up, catch fire, or cause electrical shock.
• For all electrical work, follow all local and national wiring standards, regulations, and the
Installation Manual. Connect cables tightly, and clamp them securely to prevent external forces
from damaging the terminal. Improper electrical connections can overheat and cause fire, and may
also cause shock. All electrical connections must be made according to the Electrical Connection
Diagram located on the panels of the indoor and outdoor units.
WARNINGS FOR PRODUCT USE
• If an abnormal situation arises (like a burning smell), immediately turn off the unit and disconnect
the power. Call your dealer for instructions to avoid electric shock, fire or injury.
• Do not insert fingers, rods or other objects into the air inlet or outlet. This may cause injury, since
the fan may be rotating at high speeds.
• Do not use flammable sprays such as hair spray, lacquer or paint near the unit. This may cause
fire or combustion.
• Do not store gasoline or flammable substances near air conditioner. Emitted gas may collect
around the unit and cause explosion.
• Do not
•
•
Do not expose your body directly to cool air for a prolonged period of time.
Do not allow children to play with the air conditioner. Children must be supervised around the
unit at all times.
install your air conditioner in a wet room such as a bathroom or laundry room. Too
much exposure to water can cause electrical components to short circuit.
•
•
•
If the air conditioner is used together with burners or other heating devices, thoroughly ventilate
the room to avoid oxygen deficiency and carbon monoxide build up.
In certain environments, such as kitchens, server rooms, etc., the use of specially designed
air-conditioning units is highly recommended.
Improper installation, adjustment, alteration, service or maintenance can cause property damage,
personal injury or loss of life. Installation and service must be performed by a licensed professional
HVAC installer or equivalent, service agency, or the gas supplier.
03

Installation and Operation Manual - VCDxxSA
4
•
•
•
•
•
•
•
•
•
•
•
•
•
If connecting power to fixed wiring, an all-pole disconnection device which has at least 3mm
clearances in all poles, and have a leakage current that may exceed 10mA, the residual current
device(RCD) having a rated residual operating current not exceeding 30mA, and disconnection
must be incorporated in the fixed wiring in accordance with the wiring rules.
WARNINGS FOR PRODUCT INSTALLATION
WARNINGS FOR CLEANING AND MAINTENANCE
Installation must be performed by an authorized dealer or specialist. Defective installation can
Excessive Weight Hazard - Use two or more people when moving and installing the unit. Failure
to do so can result in back or other type of injury.
cause water leakage, electrical shock, or fire.
Installation must be performed according to the installation instructions. Improper installation
can cause water leakage, electrical shock, or fire.
(In North America,installation must be performed in accordance with the requirement of NEC
and CEC by authorized personnel only.)
Contact an authorized service provider for repair or maintenance of this unit. This appliance
shall be installed in accordance with national wiring regulations.
Only use the included accessories, parts, and specified parts for installation. Using non-standard
parts can cause water leakage, electrical shock, fire, and can cause the unit to fail.
Install the unit in a firm location that can support the unit’s weight. If the chosen location cannot
support the unit’s weight, or the installation is not done properly, the unit may fall and cause
serious injury and damage.
Do not turn on the power until all work has been completed.
When moving or relocating the air conditioner, consult experienced service technicians for
disconnection and reinstallation of the unit.
How to install the appliance to its support, please read the information for details in "indoor unit
installation" and "outdoor unit installation" sections .
For units that have an auxiliary electric heater, do not install the unit within 1 meter (3 feet) of
any combustible materials.
Do not install the unit in a location that may be exposed to combustible gas leaks. If combustible
gas accumulates around the unit, it may cause fire.
Install drainage piping according to the instructions in this manual. Improper drainage may
cause water damage to your home and property.
•Do not clean the air conditioner with combustible cleaning agents. Combustible cleaning agents
can cause fire or deformation.
• Turn off the device and disconnect the power before cleaning. Failure to do so can cause electrical
shock.
•Do not clean the air conditioner with excessive amounts of water.
04

Installation and Operation Manual - VCDxxSA
5
NOTE ABOUT FUSE SPECIFICATIONS
NOTE
The air conditioner’s circuit board (PCB) may be designed with a fuse to provide overcurrent
protection. This fuse must be replaces with identical component.
The specifications of the fuse, if equipped, are printed on the circuit board, examples of such are
T5A/250VAC and T10A/250VAC.
•
•
•
•
•
•
NOTE ABOUT FLUORINATED GASSES (NOT APPLICABLE TO THE
UNIT USING R290 REFRIGERANT)
This air-conditioning unit contains fluorinated greenhouse gasses. For specific information on the
type of gas and the amount, please refer to the relevant label on the unit itself or the
“Owner's Manual - Product Fiche ” in the packaging of the outdoor unit. (European Union
products only).
Installation, service, maintenance and repair of this unit must be performed by a certified
technician.
Product uninstallation and recycling must be performed by a certified technician.
When the unit is checked for leaks, proper record-keeping of all checks is strongly recommended.
The allowed static pressure range of the air conditioner on site is 0-0.80 in-H2O (0-200 Pa).
The data below represents the static pressures at full required air flow used for AHRI testing.
The maximum functional total external static pressure can not exceed 0.80 in WC or 200 Pa. The
airflow reduces significantly beyond 0.80 in WC or 200Pa. System design should allow for the
increased resistance of filters as they become dirty.
05
PRESSURE
(Before Jan,1,2023)
PRESSURE
(After Jan,1,2023) 0.5 in-H2O(125Pa) 0.5 in-H2O(125Pa) 0.5 in-H2O(125Pa)
0.10 in-H2O(25Pa) 0.15 in-H2O(37Pa) 0.20 in-H2O(50Pa)

Installation and Operation Manual - VCDxxSA
6
Foam
Braze to are adapter (some models)
Flare nut (optional)
Cable ties
Wired remote controller
Battery (optional)
Remote controller (optional)
Manual
Drain tting
Gasket
ACCESSORIES
The air conditioning system comes with the following accessories. Use all of the installation
parts and accessories to install the air conditioner. Improper installation may result in water
leakage, electrical shock and fire, or equipment failure.
Accessories (Packed with the indoor unit)
Accessories-optional (Packed with the outdoor unit)
NOTICE
The wired system control functions as an IR receiver for the handheld remote, if the remote is not used
it must be retained with the indoor unit to adjust parameters, and for troubleshooting.
06
Braze to are adapter (optional)

Installation and Operation Manual - VCDxxSA
7
INDOOR UNIT INSTALLATION
CAUTION
Install the indoor and outdoor units, cables and wires at least 1m (3-1/5′) from televisions or radios
to prevent static or image distortion. Depending on the appliances, a 1m (3-1/5′) distance may not
be sufficient.
The Indoor unit must be electrically grounded per national and local electrical code.
07
Securely install the indoor unit on a structure
that can support its weight. If the structure is
too weak, the unit may fall and cause personal
injury, unit and property damage, or death.
WARNING
MUST BE INSTALLED IN A LOCATION
THAT MEETS THE FOLLOWING REQUIREMENTS:
Enough room for
installation and
maintenance.
Enough room for the
connecting pipe
and drainpipe.

Place air handler so that heating
elements are at least 18 inches (46 cm) above the
floor for a garage installation. Failure to follow these
instructions can result in death, explosion, or fire.


The structure that the equipment is suspended
from must support the weight of the indoor unit.

A stable position
At least 18in(46cm)
spaciousness
Must support the weight of
the indoor unit.
Select the installation location of indoor units
DO NOT install the indoor
unit in a moist environment.
Excessive moisture can
corrode the equipment,
electrical components, and
cause electrical shorts.
DO NOT LOCATIONS:
WARNING
Areas with oil
drilling or
fracking.
Coastal areas
with high salt
content in the air.
Areas where there may be
detergent or other corrosive
gases in the air, such as
bathrooms, or laundry rooms.
Areas with strong
electromagnetic
waves.
Areas that
store flammable
materials or gas.
Danger of explosion. Keep
flammable materials and vapors,
such as gasoline, away from
air handler.
Areas where the air
inlet and outlet may
be obstructed.

Installation and Operation Manual - VCDxxSA
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Preparation and precautions for indoor unit installation
NOTICE
•
•
Remove all accessories and packing
in the air outlet before installation.
•
Air outlet
There must be an airtight seal between the bottom of the air handler and the return air plenum. Use
fiberglass sealing strips, foil duct tape, caulking, or equivalent sealing method between the plenum and
the air handler cabinet to ensure a tight seal. Return air must not be drawn from a room where this air
handler or any gas-fueled appliance (i.e., water heater), or carbon monoxide-producing device (i.e., wood
fireplace) is installed.
WARNING
WARNING
Recommended Distances Between the Indoor Unit
The distance between the mounted indoor unit should
meet the specifications illlustrated in the following diagram.
Horizontal installations
Minimum clearance
of 25.4mm/1”all sides
Flexible
duct collar
The outlet side pipe length 1.5m/59”.
or
Vertical installations
Fixing instructions: When installed vertically (upward
or downward), the lower end of the air outlet needs to
be connected to the L-shaped metal air duct and
fastened by screws.
08
Coil compartment
(Access panel Removed)
Upflow
drain pan
Horizontal drain pan
Please apply sealant around the
places where the wires, refrigerant
pipes and condensate pipes enter
the cabinet.
Use duct tape or flexible sealant to
seal closed anyspace around the
holes where the drain lines exit the
cabinet. Warm air must not be
allowed to enter throughany gaps
or holes in the cabinet.

Installation and Operation Manual - VCDxxSA
9
(unit: mm/inch)
(unit: mm/inch)
mm
Model(Btu/h)
Dimensions
Model(Btu/h)
Model A Model B
24K
Length of A
Length of B
Length of C
406.4
Model(Btu/h) 24K 30K-48K 60K
Length of W
Length of D
Length of t 25.4 25.4
1
1 1
20 23
20 20
508
25.4
20
508
508
16
mm
inch
mm
inch
mm
inch
495.3 584.2
Length of D
Length of E
Length of A
Length of B
Length of C
Length of D
Length of E
30K~48K 60K 60K
Dimensions
inch
mm
inch
mm
inch
mm
inch
mm
inch
mm
inch
mm
inch
mm
inch
mm
inch
mm
inch
1143
45
533
21
445
17-1/2
400
15-3/4
260
10-1/4
1245
49
533
21
534
21-1/50
490
19-5/16
260
10-1/4
1346
53
533
21
622
24-1/2
580
22-27/32
260
10-1/4
1245
49
533
21
534
21-1/50
490
19-5/16
260
10-1/4
Indoor unit parts installation size
Recommended size of filter
A
B
C

Installation and Operation Manual - VCDxxSA
10
Installation Position Requirements
Horizontal installationsVertical installations
10
NOTICE FOR DUCT CONNECTIONS：
More Requirements
It should be insulated
and use a Vapor Barrier.
It should be Flexible
suspension mounted
and not fastened
It should be fabricated
and installed in
accordance with local
and/or national codes.
It should be assembled
accordance to the
instructions.
Air supply and return may be handled in one of several ways best suited to the installation (See table
for dimensions for duct inlet and outlet connections). The vast majority of problems encountered
with combination cooling systems can be linked to improperly designed or installed duct systems.
It is therefore highly important to the success of an installation that the duct system be properly
designed and installed. Use flexible duct collars to minimize the transmission of vibration/noise into
the conditioned space. Where return air duct is short, or where sound could potentially to be a
problem, sound absorbing liner should be used inside the duct.
Duct must be insulated where it runs through an unconditioned space during the cooling season.
The use of a vapor barrier is recommended to prevent absorption of moisture from the surrounding
air into the insulation.
The supply air duct connection should be properly sized by use of a transition to match unit opening.
All ducts should be suspended using flexible hangers and never fastened directly to the structure.
This unit is not designed for nonducted (freeblow) applications.
Duct work should be fabricated and installed in accordance with local and/or national codes.
•
•
•
•
•

Installation and Operation Manual - VCDxxSA
11
The units can be installed in a vertical (down and up)and Horizontal(right and left) configuration.
Horizontal left
Horizontal right
Upflow Downflow
A field-fabricated secondary drain pan, with a drain pipe to the outside of the building, is required in
all installations over a finished living space or in any area that may be damaged by overflow from the
main drain pan. In some localities, local codes may require a secondary drain pan for any horizontal
installation.
CAUTION
Selection of installation direction
Different installation directions
Airflow direction of different installation directions
HorizontalVertical up
At least
18in(46cm)
NOTICE
For horizontal installation，
a secondary drain pan（not
supplied）must be installed.
•
NOTICE
Vertical up and horizontal left installation does not need to change the direction of evaporator.•
11

Installation and Operation Manual - VCDxxSA
12
Connecting the wire and pipes(pipes and drainage pipes)
Down flow and horizontal right instructions
Please follow these steps to perform Vertical down installation and Horizontal right installation:
Open the upper cover.
Step 1
Open the cover of the electronic control box.
Step 2
Remove the filter
door, then take the
filter off.
Step 1
Remove the upper
cover assembly.
Step 2
Remove evaporator
cover plate.
Step 3
Remove the
bottom cover first.
Then remove
the second
cover plate.
Connect the wire according to the wiring diagram.
Step 3
Connect the pipes and install the drainage pipes.
Step 4
The unit may be installed in one of the upflow, downflow, horizontal left or horizontal right orientations.
NOTICE
12

Installation and Operation Manual - VCDxxSA
13
13
30-48K model
60K model
Step 4
Indication of the position of each
temperature temperature sensor
of the evaporator, confirm your
model.
24K model
Unplug temperature sensors T1,T2 from
the control board.
T1: Room temperature sensor
T2: Evaporator central sensor plug
Step 5
Remove T1,T2 sensor wire ties.
Step 6
NOTICE
T1 is only available for some models.•
T2
T1
T2
T1
T2
T1

Installation and Operation Manual - VCDxxSA
14
14
Take out the evaporator and drain pan and rotate 180°
(when your equipment need to be vertical
downed configuration).
Step 6
Reinstall T1, T2 sensor plug and tie up the
sensor wires.
Cut the foam
gasket.
Remove knockouts
as shown in the
figure.
Hook the wire into
the buckle and go
down from the wire
slot.
Replace foam
gasket over wires.
Step 9
Step 7
Adjust the mounting parts position according to the
direction of equipment.
Step 8
Reinstall the evaporator and drain pan.
NOTICE
The wire body needs to pass through the
wire groove from the drain pan and be
stuck on the hook of the drain pan.

Installation and Operation Manual - VCDxxSA
15
CAUTION FOR ALL PIPES INSTALLATION
The evaporator is assembled in place.
Step 10
Connect the wire according to the wiring diagram.
Step 13
Reassenble the upper cover and Reinstall the filter,
filter cover plate.
Step 14
Connect the pipes and install the drainage pipes.
Step 15
Use cable ties to fix the room temperature
sensor as shown in the figure.
Step 11
Reinstall evaporator cover plate.
Step 12
• Insulate all piping to prevent condensation, which could lead to water damage.
•The drainpipe is used to drain water away from the unit. If the drainpipe is bent or installed incorrectly,
water may leak and cause a water-level switch malfunction.
• In HEAT mode, the outdoor unit will discharge water. Ensure that the drain hose is placed in an
appropriate area to avoid water damage and icy conditions on walkways.
•DO NOT pull the drainpipe forcefully. This could disconnect it.
15
cable
ties
NOTICE
If installed above a finished living space, a secondary drain pan (as required by many building codes),
must be installed under the entire unit and its condensate drain line must be routed to a location such
that the user will see the condensate discharge.

Installation and Operation Manual - VCDxxSA
16
•
•
These units operate with a negative pressure
at the drain connections and a drain trap is
required. The trap needs to be installed as
close to the unit as possible. Make sure the
top of the trap is below the connection to
the drain pan to allow complete drainage
of the pan.
Primary drain
Installation requires pvc pipe or other suitable material per local and national codes, which can be
obtained at your local hardware store or dealer.
NOTICE ON PURCHASING PIPES
After removal of drain pan plug(s), check drain hole(s) to verify that drain opening is fully open and
free of any debris. Also check to make sure that no debris has fallen into the drain pan during
installation that may plug up the drain opening. Seal around the exiting drain pipe, liquid and suction
lines to prevent infiltration of humid air.
On units of this type, where the blower “draws” rather than “blows” air through the coil, traps must be
installed in the condensate drain lines (primary and auxiliary, if used). Traps prevent the blower from
drawing air through the drain lines into the air supply.
Vertical Installations
Vertical discharge
16
Main
drain hole
Overflow
drain hole
WARNING
NOTICE
NOTE ON DRAINPIPE INSTALLATION
Horizontal runs must also have an anti-siphon
air vent(standpipe) install ahead of the horizontal
run to eliminate air trapping.
• The Figure shows how to trap or plug all
drains during vertical discharge.
• The Figure shows how to trap or plug all
drains during right-hand discharge.
• The seal plug are supplied as accessories
and should be screwed tightly only by hand.
• Incorrect installation could cause water to
flow back into the unit and flood
The drainpipe outlet should be at least
5cm(1.9in) above the ground. If it touches the
ground, the unit may become blocked
and malfunction.
CAUTION

Installation and Operation Manual - VCDxxSA
17
Notes on pipe length and elevation
REFRIGERANT PIPING CONNECTION
All field piping must be completed by a licensed technician and must comply with the local and
national regulations.
• When the air conditioner is installed in a small room, measures must be taken to prevent the
refrigerant concentration in the room from exceeding the safety limit
in the event of refrigerant leakage. If the refrigerant leaks and its concentration exceeds its proper
limit, hazards due to lack of oxygen may result.
• When installing the refrigeration system, ensure that air, dust, moisture or foreign substances do not
enter the refrigerant circuit. Contamination in the system may cause poor operating capacity, high
pressure in the refrigeration cycle, explosion or injury.
• Ventilate the area immediately if there is refrigerant leakage during the installation. Leaked refrigerant
gas is both toxic and may be flammable. Ensure there is no refrigerant leakage after completing the
installation work
WARNING
Oil trap
Liquid piping
6m/20ft
(<36000Btu/h unit)
10m/32.8ft
(≥36000Btu/h unit)
6m/20ft
(<36000Btu/h unit)
10m/32.8ft
(≥36000Btu/h unit)
Gas piping
Indoor unit/
Outdoor unit
Indoor unit/
Outdoor unit
CAUTION
Oil traps
If oil flows back into the outdoor unit’s
compressor, this might cause liquid
compression or deterioration of oil return.
Oil traps in the rising gas piping can
prevent this.
An oil trap should be installed every
6m(20ft) of vertical suction line riser
(＜36000Btu/h unit). An oil trap should be
installed every 10m(32.8ft) of vertical
suction line riser (≥36000Btu/h unit).
Parts you must
purchase separately.
Consult the dealer
about the proper
pipe size of the unit
you purchased.
Connecting
pipe
assembly
Liquid
side
Φ6.35(1/4in)
Φ9.52(3/8in)
Φ12.7(1/2in)
Φ16(5/8in)
Φ19(3/4in)
Φ22(7/8in)
Gas
side
Name Shape Quantity(PC)
17
Ensure that the length of the refrigerant pipe, the
number of bends, and the drop height between the
indoor and outdoor units meets the requirements
shown in the table next to it：
The maximum length and drop
height based on models.(Unit:m/ft.)
MaxLength of
piping
Maximum drop
height
ft.
164
213
Capacity
(Btu/h)
m
50
65
ft.
82
98.4
m
25
30
24k/30k
36k/48k/60k

Installation and Operation Manual - VCDxxSA
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DO NOT DEFORM PIPE
WHILE CUTTING
Connection Instructions—Refrigerant Piping
Step 1: Cut pipes
When preparing refrigerant pipes, take
extra care to cut and flare them properly.
This will ensure efficient operation and
minimize the need for future maintenance.
Measure the distance between the
indoor and outdoor units.
Using a pipe cutter, cut the pipe a
little longer than the measured
distance.
Make sure that the pipe is cut at a
perfect 90° angle.
Step 2: Remove burrs
Burrs can affect the air-tight seal of refrigerant piping
connection. They must be completely removed.
Hold the pipe at a downward angle to prevent
burrs from falling into the pipe.
Using a reamer or deburring tool, remove all burrs
from the cut section of the pipe.
Step 3: Flare pipe ends
Be extra careful not to damage, kink, or
deform the pipe while cutting. This will
drastically reduce the heating
performance
•
•
•
Proper flaring is essential to achieve an airtight seal.
After removing burrs from cut pipe, seal the ends
with PVC tape to prevent foreign materials from
entering the pipe.
Sheath the pipe with insulating material.
Place flare nuts on both ends of pipe. Make sure
they are facing in the right direction, because you
can’t put them on or change their direction after
flaring.
•
•
•
Remove PVC tape from ends of pipe when ready
to perform flaring work.
•
•
•
Oblique Rough Warped
90°
Pipe
Reamer
Point down
Flare nut
Copper pipe
18

Installation and Operation Manual - VCDxxSA
19
NOTICE
MINIMUM BEND RADIUS
Connect the copper pipes to the indoor unit first,
then connect it to the outdoor unit. You should
first connect the low-pressure pipe, then the
highpressure pipe.
When connecting the flare nuts, apply a thin
coat of refrigeration oil to the flared ends of
the pipes.
Align the center of the two pipes that you will
connect.
Tighten the flare nut snugly by hand.
Using a wrench, grip the nut on the unit tubing.
While firmly gripping the nut, use a torque
wrench to tighten the flare nut according to
the torque values in above table.
32-39 N.m
49-59 N.m
57-71 N.m
67-101 N.m
85-110 N.m
(180-200kgf.cm)
(320-390kgf.cm)
(490-590kgf.cm)
(570-710kgf.cm)
(670-1010kgf.cm)
(850-1100kgf.cm)
Flare shape
Tightening
torque
Pipe
gauge Min. Max.
Flare dimension(A)
(Unit:mm/lnch)
CAUTION
Ensure to wrap insulation around the piping.
Direct contact with the bare piping may
result in burns or frostbite.
• Make sure the pipe is properly connected.
Over tightening may damage the bell
mouth and under tightening may lead to
leakage.
PIPING EXTENSION BEYOND FLARE FORM
Step 4: Connect pipes
•
•
•
•
•
Clamp flare from on the end of the pipe. The end
of the pipe must extend beyond the flare form.
•
Place flaring tool onto the form.
Turn the handle of the flaring tool clockwise
until the pipe is fully flared.
•
After connecting the copper pipes to the
indoor unit, wrap the power cable, signal
cable and the piping together with
binding tape.
•
•
•
Flare form
Pipe
Remove the flaring tool and flare form, then
inspect the end of the pipe for cracks and even
flaring.
Outdoor unit
Liquid side piping
(Smaller diameter)
(Bigger
Torque wrench
NOTICE
Use both a spanner and a torque wrench
when connecting or disconnecting pipes to/from
the unit.
Carefully bend the tubing in the middle
according to the diagram below.
DO NOT bend the tubing more than 90°
or more than 3 times.
NOTICE
DO NOT intertwine or cross the signal cable
with any other wiring.
Use appropriate tool
min-radius 10cm(3.9 )
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