LG LT-C1260CL User manual

Ceiling Cassette
Air Conditioner
SERVICE MANUAL
MODELS: LT-C1260CL
LT-C1260HL
LT-C1262HL

Contents
Functions .................................................................................................................................3
Product Specifications (Cooling & Heating)..........................................................................5
Dimensions ..............................................................................................................................7
Refrigeration Cycle Diagram ..................................................................................................8
Wiring Diagram ........................................................................................................................9
Operation Details ...................................................................................................................10
Installation of Indoor, Outdoor Unit .....................................................................................13
2-way, 3-way valve..................................................................................................................29
3-way Valve ............................................................................................................................31
Cycle Troubleshooting Guide ...............................................................................................36
Electronic Parts Troubleshooting Guide .............................................................................37
Electronic Control Device .....................................................................................................40
Schematic Diagram ...............................................................................................................41
Exploded View and Replacement Parts List .......................................................................42
–2–

Functions
Indoor Unit
Operation ON/OFF by Remote controller
Sensing the Room Temperature
Room temperature control
Starting Current Control
Time Delay Safety Control
Indoor Fan Speed Control
Soft Dry Operation Mode
Airflow Direction Control
Auto Operation(Auto Change Over)
Deice (defrost) control (Heating)
Auto Restart
–3–
Hot-start Control (Heating) • The indoor fan stops until the evaporator piping tempera-
ture will be reached at 28°C.
Compact and light design • To install a unit is very convenient size because of smaller
than fextile size. ( 600 x 600 )
Low noise • The most advanced low-noise design.
• The adoption of turbo fan and round type heat exchanger
give the quietest operation.
Long life filter • Long life type(wrinkle) and wastable and anti-bacteria filter
is adopted.
Plasma Air Purifying Filter(2HL Only)
High head height Drain pump • Built-in drain pump automatically drains water.
• A standard drain-head height of up to 700mm is possible.
High-Ceilingcorresponding Function • According to the height of ceiling, the RPM of indoor fan
motor is selectable to increase air reaching distance.
Central Control(Optional) •
It is operating individually or totally by central control function.
Group Control(Optional Wiring) •
Each controller can control 16 units and 8 controllers can connect.
•
It operates maximum 16 units by only one wired remote con-
troller and each unit starts random to prevent overcurrent.
• Room temperature sensor. (Thermistor)
• Maintains the room temperature in accordance with the Setting Temp.
• Indoor fan is delayed for 5 seconds at the starting.
• Restarting is inhibited for approx. 3 minutes.
• Jet, High, Med, Low
• Intermittent operation of fan at low speed.
• The louver can be set at swing up and down automatically.
• Although the air-conditioner is turned off by a power failure, it is restarted automati-
cally previous operation mode after power supply.
• The setting temperature and desired operation mode are auto-
matically set by fuzzy rule.
• Both the indoor and outdoor fan stops during defrosting.
• Hot start after defrost ends.

–4–
Remote Controller
Operation ON/OFF
Operation Mode Selection
Fan Speed Selection
Room Temperature Display
Temperature Setting
Setting the Timer
Weekly Program
(Cooling
model only) (Heating
model only)
(Low) (Med) (High)
Cooling Operation Mode ( )
Heating Operation Mode ( ) Auto Operation Mode ( )
Soft Dry Operation Mode ( )
Fan Operation Mode
HI JET AUTOMEDLO
Program Holiday
SET/CLR
MinHour
Week
Timer CancelTimer Cancel
: High:39°C ↔LOW:11°C
: Fan Operates without cooling & heating
Cooling Heating
Down to 18°C
Up to 30°CDown to 16°C Up to 30°C

Power Supply ø, V, Hz
Capacity Cooling kcal/h(W)
Btu/h
Heating kcal/h(W)
Btu/h
Input Cooling W
Heating W
Running Current Cooling A
Heating A
Starting Current Cooling A
Heating A
E.E.R kcal/h(W)
C.O.P W/W
Air Circulation Indoor m3/min
Outdoor m3/min
Moisture Removal l/ h
Air-Flow Direction Control
Heating Operation Mode
Fan Speeds (steps)
Auto Operation (Changeover)
Forced Operation
Jet Cool
Soft Dry Operation
Timer Delay Safety Function
Feature Air Deflection (Way)
Self Diagnosis
Hot start
Auto Restart
Air refresh (Hole)
High Ceiling
Group Control
Central Control
Air purifying filter
Wired remote controller (with weekly Program)
Refrigerant(R-22) Charge g
Dimensions Indoor mm
(W x D x H) Panel mm
Outdoor mm
Net Weight Indoor kg
Outdoor kg
Main Power Cord AWG#:P*mm2
Connection Cable AWG#:P*mm2
Service Valve Liquid inch(mm)
Gas inch(mm)
Installation Pipe Length (m)
Elevation (m)
Insulation(material/thickness)
Drain Hose(I.D/O.D) mm
Product Specifications (Cooling & Heating)
–5–
1, 220-240, 50
3,024(3,516)
12,000
-
-
1,200
-
5.5
-
22
-
2.52
-
10
25
1.5
O
X
4
O
O
O
O
O
1
O
X
O
O
O
O
Optional
O
X
800
860 x 390 x 180
1050 x 480 x 30
770 x 540 x 245
17 (14+3)
31
14:3*2.5
18:4*0.75
1/4(6.35)
1/2(12.7)
15
7
FoamPE/5mm
ø25/32
1, 220-240, 50
3,024(3,516)
12,000
3,024(3,516)
12,000
1,200
1,100
5.5
5.0
22
21
2.52
3.19
10
25
1.5
O
O
4
O
O
O
O
O
1
O
O
O
O
O
O
Optional
O
X
850
860 x 390 x 180
1050 x 480 x 30
770 x 540 x 245
17 (14+3)
31
14:3*2.5
18:6*0.75
1/4(6.35)
1/2(12.7)
15
7
FoamPE/5mm
ø25/32
1, 220-240, 50
3,024(3,516)
12,000
3,024(3,516)
12,000
1,200
1,100
5.5
5.0
22
21
2.52
3.19
10
25
1.5
O
O
4
O
O
O
O
O
1
O
O
O
O
O
O
Optional
O
O
850
860 x 390 x 180
1050 x 480 x 30
770 x 540 x 245
17 (14+3)
31
14:3*2.5
18:6*0.75
1/4(6.35)
1/2(12.7)
15
7
FoamPE/5mm
ø25/32
Model LT-C1260CL LT-C1260HL LT-C1262HL

Dimensions
–6–
694.5
1050
480
846
860
328.430.8 390
893.4
931.6
16.7
50
42.7
7
430
130
Ø80
Ø55
180
91.6
155
97.7
37
116.3
141.8
180
164
194.4
91.6
180
(1) Indoor Unit

(2) Outdoor Unit
–7–
WL2
L3
L1
D
H
L4
L5
Gas side
(3-way valve)
Liquid side
(2-way valve)
MODEL 12K Btu Series
DIM unit
W mm 770
H mm 540
D mm 245
L1 mm 287
L2 mm 64
L3 mm 518
L4 mm 10
L5 mm 100

Refrigeration Cycle Diagram
•Rated performance for refrigerant line length of: 7.5m
•If 12K Capacity is installed at a distance of 15m, 225g of refrigerant
should be added ....................................................(15-7.5) x 30g
–8–
INDOOR UNIT OUTDOOR UNIT
HEAT
EXCHANGE
(EVAPORATOR)
HEAT
EXCHANGE
(CONDENSER)
COMPRESSOR
ACCUMU
LATOR
GAS SIDE
3-WAY VALVE
LIQUID SIDE
2-WAY VALVE
CAPILLARY TUBE
CHECK VALVE
(Heating Model only)
COOLING
HEATING
REVERSING
VALVE
(Heating Model Only)
12K Btu/h 1/2" 1/4" 7.5 15 5 7 30
Capacity
GAS LIQUID
Elevation (m)
Length (m) * Additional
refrigerant
(g/m)
Pipe Size
Rated Rated
Max. Max.

–9–
Wiring Diagram
HEAT PUMP
COOLING ONLY
OUTDOOR WIRING DIAGRAM INDOOR WIRING DIAGRAM
FAN
MOTOR COMP
CSR
OLP
YLYL BLBL RDRD
BR RD
BL
BL
BR
GN/YL
BL
BL
BL
RD BK
BK
BL
BR BR RD BLBL
CAPACITOR
3854A20072K
FCH
PTC
48
61 0
2
45 789
TERMINAL
BLOCK
TO INDOOR UNIT
POWER
RELAY
REVERSING
VALVE
TB
CAPACITOR
TEMP
THERMISTOR PIPE THERMISTOR FLOAT S/W
MAIN PCB ASSY
STEP
MOTOR
REMOTE
CONTROL
CN-STEP/MCN-REMO
CN-POWER
CN-CC
CN-DISP
DISPLAY PCB ASSY
CN-ROOM CN-PIPE CN-FLOAT
CN-MOTOR
CN-D/PUMP
INDOOR
MOTOR
BR
BR
BK
OR
YL
BR
BL
BL
RD
BK YL
GN/YL
TERMINAL
BLOCK
POWER
INPUT
TO OUTDOOR UNIT
1(L) 2(N) 4 5
DRAIN
PUMP
3854A20072N
FUSE T3.15A
789
GN/YL
GN/YLGN/YL
4WAY
OUT FAN
OUTDOOR WIRING DIAGRAM INDOOR WIRING DIAGRAM
FAN
MOTOR COMP
CSR
OLP
YLYL BLBL RDRD
BR RD
BL
BL
BR
GN/YL
BL
BL
BL
RD
BL
BR BR RD BLBL
CAPACITOR
3854A20072M
FCH
PTC
48
61 0
2
45 789
TERMINAL
BLOCK
TO INDOOR UNIT
POWER
RELAY
TB
CAPACITOR
TEMP
THERMISTOR PIPE THERMISTOR FLOAT S/W
MAIN PCB ASSY
STEP
MOTOR
REMOTE
CONTROL
CN-STEP/MCN-REMO
CN-POWER
CN-CC
CN-DISP
DISPLAY PCB ASSY
CN-ROOM CN-PIPE CN-FLOAT
CN-MOTOR
CN-D/PUMP
INDOOR
MOTOR
BR
BR
BK
OR
YL
BR
BL
BL
RD
GN/YL
TERMINAL
BLOCK
POWER
INPUT
TO OUTDOOR UNIT
1(L) 2(N) 4 5
DRAIN
PUMP
3854A20072L
FUSE T3.15A
789
GN/YL
GN/YLGN/YL

–10–
Operation Details
(1) The function of main control
1. Time Delay Safety Control
•3min The compressor is ceased for 3minutes to balance the pressure in the refrigeration cycle.
(Protection of compressor)
•5sec Vertical air flow direction control louvers open in 5 seconds to prevent noise between louvers and wind.
•30sec The 4-way valve is ceased for 30sec. to prevent the refrigerant-gas abnormal noise when the Heating
operation is OFF or switched to the other operation mode while compress is off.
While compressor is running, it takes 3~5 seconds to switch.
2. Auto Swing Control
•This function is to swing the louver up and down automatically.
3. Air-Filter Checking Control
•'Filter' will display in the remote controller display and main body display when an air-filter is polluted. Then clean
the air-filter for reference to Owners Manual.
4. Soft-Dry Operation
•The indoor fan speed is automatically set to the low, so the shift of the indoor fan speed is impossible because of
already being set to the best speed for Dry Operation by Micom Control.
5. Cooling Mode Operation
•When selecting the Cooling( ) Mode Operation, the unit will operate according to the setting by the remote con-
troller and the operation diagram is as following
Intake Air temp.
SET TEMP.+0.5°C
(COMP. ON)
SET TEMP. -0.5°C
(COMP. OFF) More than More than
3 minutes 3 minutes
Selecting Selecting Selecting
fan speed fan speed fan speed
COMPRESSOR ON OFF ON OFF ON
INDOOR FAN Low Low

–11–
Intake Air temp.
Setting temp.+3°C
(Compressor OFF)
Setting temp.
(Compressor ON)
INDOOR FAN Low OFF Low Low OFF
COMPRESSOR ON OFF ON OFF
A point; While the indoor Heat-Exchanger temperature is higher than 40°C fan operates at low speed, when
it becomes lower than 40˚C fan stops.
B point; When the indoor Heat-Exchanger temperature is higher than 36°C, fan operates at seleted fan
speed, when it becomes lower than 33°C, the fan operates at low speed.
6. Heating Mode Operation (Except Cooling Model)
The unit will operate according to the setting by the remote controller and the operation diagram is shown as following.
(Hot Start)
Low
OFF
Selecting
Fan Speed
minimum 3min
Selecting fan
speed
minimum
10sec.
1min
AA
minimum
1min. minimum 10sec.
B
7. Hot-Start Control
The indoor fan stops until the evaporator piping temperature will be reached to 28°C.
The operation diagram is as following.
PIPING
TEMPERATURE 1min
COMPRESSOR
INDOOR FAN
ON
OFF LOW Selecting
fan speed
22°C
25°C

–12–
8. Defrost Control
•Defrost operation is controlled by timer and sensing the indoor piping temperature.
•The defrost starts only when the outdoor pipe temperature falls below -6°C after 45 minutes passed from starting
of heating operation.
•Defrost ends after 9 minutes 30 seconds passed from starting of defrost operation or when the outdoor pipe
temperature rises over 12°C even if before 12 minutes.
More than 45 minutes
of heating operation Within
9min. 45sec.
ON OFF
ON ON
ON
ON OFF
OFF
COMPRESSOR
4-WAY VALVE
INDOOR FAN
-6°C ON
12°C OFF
The outdoor
piping Temp.
ON
More than 10 min.
running of compressor
More than 45 minutes
of heating operation
5sec. HOT-
START
ON
9. Self-Diagnosis Function
•'CHECK' will flash in the remote controller display when a problem occurs. Then please contact your dealer.
•Correct the accident point as shown in the table below before restarting operation.
•During the normal operation 'CHECK' won't be displayed in the remote controller.
Remote controller LCD Accident Point
CH 01 Indoor room temperature thermistor error
CH 02 Indoor piping thermistor error
CH 03 Indoor main body / Remote controller unit communication error
CH 04 Water level float switch error

–13–
Installation of Indoor, Outdoor Unit
1. Selection of the best location
1) Indoor unit
•There should not be any heat source or steam
near the unit.
•There should not be any obstacles to prevent the
air circulation.
•A place where air circulation in the room will be
good.
•A place where drainage can be easily obtained.
•A place where noise prevention is taken into con-
sideration.
•Do not install the unit near the door way.
•Ensure the spaces indicated by arrows from the
wall, ceiling, or other obstacles.
•The indoor unit must keep the maintenance
space.
2) Outdoor unit
•If an awning is built over the unit to prevent direct sun-
light or rain exposure, be careful that heat radiation
from the condenser is not restricted.
•There should not be any animals or plants which
could be affected by hot air discharged.
•Ensure the spaces indicated by arrows from the wall,
ceiling, fence or other obstacles.
3) Piping length and the elevation
Unit:cm
Ceiling
Ceiling Board
Ceiling Board
20 or more
Above 250 330 or less
100 or more
50 or
more
50 or
more
30 or less
Floor
More than
30cm
Fence or
obstacles
More than 70cm
More than 50cm
More than
More than
30cm
More than
30cm
Sunroof
Indoor unit
Outdoor unit
B
A
CAPACITY
12K Btu/h 1/2" 1/4" 7. 515
GAS LIQUID
57 30
Elevation B (m)
Length A (m) * Additional
refrigerant
(g/m)
Pipe Size
Rated Rated
Max. Max.
•Rated performance for refrigerant line length of: 7.5m
•If 12K Model is installed at a distance of 15m, 225g of refrigerant
should be added.......................................................(15-7.5)x30g

–14–
NOTE:
•Thoroughly study the following installation locations:
1. In such places as restaurants and kitchens, considerable amount of oil steam and flour adhere to the turbo fan,
the fin of the heat exchanger and the drain pump, resulting in heat exchange reduction, spraying, dispersing of
water drops, drain pump malfunction, etc.
In these cases, take the following actions:
•Make sure that the ventilation fan for smoke-collecting hood on a cooking table has sufficient capacity so that
it draws oily steam which should not flow into the suction of the air conditioner.
•Make enough distance from a cooking room to install the air conditioner in such a place where it may not
suck in oily steam.
2. Avoid installing air conditioner in such circumstances where cutting oil mist or iron powder is in suspension in
factories, etc.
3. Avoid places where inflammable gas is generated, flows in, is stored or vented.
4. Avoid places where sulfurous acid gas or corrosive gas is generated.
5. Avoid places near high frequency generators.
2. Ceiling opening dimensions and hanging bolt location
Ceiling board
Level gauge
Ceiling
Use the ventilation fan
for smoke-collecting
hood with sufficient
capacity.
Cooking table
Air conditioner
Take enough
distance
1,000 (Ceiling opening)
931.6
893.4 (Hanging bolt)
328.4 (Hanging bolt)
860
390
30.8
430 (Ceiling opening)
•The dimensions of the paper model for installing are
the same as those of the ceiling opening dimen-
sions.
•Select and mark the position for fixing bolts and pip-
ing hole.
•Decide the position for fixing bolts slightly tilted to
the drain direction after considering the direction of
drain hose.
•Drill the hole for anchor bolt on the wall.
•This air-conditioner uses a drain pump.
•Horizontly install the unit using a level gauge.
•During the installation, care should be taken not to
damage electric wires.
CAUTION

–15–
Wall
5~7mm
Indoor Outdoor
Set screw of
paper model (4 pieces)
Paper model
for installation
Ceiling board
90mm
Adjust the same height
Ceiling board
Ceiling
Flat washer for M10
(accessory)
Keep the length of the bolt
from the bracket to 40mm
Open the ceiling board
along the outer edge of the
paper model
Flat washer for M10
(accessory)
Hanging bolt
(W3/8 or M10)
Nut
(W3/8 or M10)
Nut
(W3/8 or M10)
Spring washer
(M10)
Air Conditioner body
3. The Indoor Unit Installation
•The following parts is option.
Hanging Bolt - W 3/8 or M10
Nut - W 3/8 or M10
Spring Washer - M10
Plate Washer - M10
•Drill the piping hole on the wall slightly tilted to the
outdoor side using a Ø70 hole-core drill.
•Tighten the nut and bolt to prevent unit falling.
CAUTION
4. Remote Controller Installation
• Although the room temperature sensor is in the indoor unit, the remote controller should be installed
in such places away from direct sunlight and high humidity.
Installation of the remote controller
•Select places that are not splashed with water.
•Select control position after receiving customer approval.
•The room temperature sensor is built in the indoor unit.
•This remote controller equipped with liquid crystal display. If this position is higher or lower, display is difficult
to see.(The standard height is 1.2 ~ 1.5m high)
Routing of the remote controller cord
•Keep the remote controller cord away from the refrigerant piping and the drain piping.
•To protect the remote controller cord from electrical noise, place the cord at least 5cm away from other power
cables (audio equipment, television set, etc.)
•If the remote controller cord is secured to the wall, provide a trap at the top of the cord to prevent water
droplets from running.

–16–
Remote control
box body
Cord clamp
(accessory)
Lever carefully
the box open
using a screw
driver, etc.
Front case
The lower part
Face of wall
Under plate
Screw (accessory)
Remove the battery cover from the remote con-
troller.
•Slide the cover according to the arrow direction.
Insert the two batteries.
•Be sure that the (+) and (-) directions are correct.
•Be sure that both batteries are new.
Re-attach the cover.
•Slide it back into position.
•Fix the under plate on the wall
•Separate the under plate from Remote control box.
•Fix the cord clamps on the wall by ø3 tapping
screws (accessory).
•Fix the remote control cord.
WIRED REMOTE CONTROL INSTALLATION
REMOTE CONTROL PREPARATION(OPTIONAL)
DISASSEMBLING
ELECTRICAL WIRING
HOW TO MOUNT ONTO A WALL
HOW TO INSERT BATTERIES
Wire and make sure that teminal
numbers are matched on unit side and
remote controller side.
The maximum length of the cord is 100m.
If the length of the cord exceeds 50m,
use a wire size greater than 0.5mm2.
Remote controller
(Main board)
CN REMO
•Do not use rechargeable batteries,
such batteries differ from standard dry
cells in shape, dimensions, and per-
formance.
•Romove the batteries from the remote
controller if the air conditioner is not
going to be used for some long time.
HOW TO INSERT BATTERIES

–17–
The power cord connected to the outdoor unit should be complied
with the following specifications (Rubber insulation, type H05RN-F
approved by HAR or SAA).
The connecting cable connected to the indoor and outdoor unit should
be complied with the following specifications (Rubber insulation,
type H05RN-F approved by HAR or SAA).
CAUTION
8.5mm
20mm
GN/YL
7.5mm
20mm
GN/YL
NORMAL
CROSS-SECTIONAL
AREA 0.75mm
NORMAL
CROSS-SECTIONAL
AREA 2.5mm
Power cord
Remote control cord
In-Out connecting wire
Control box cover
Terminal Block of Outdoor Unit
4(L) 5(N) 789
1(L) 2(N) 4(L) 5(N) 789
Terminal Block of Indoor Unit
Power Cord
Terminal Block of Outdoor Unit
4(L) 5(N) 789
1(L) 2(N) 4(L) 5(N) 789
Terminal Block of Indoor Unit
Power Cord
5. Wiring Connection
•Open the control box cover and connect the Remote controller cord and Indoor power wires.
•Heat Pump Model
•Cooling Model
Make sure that the screws of the terminal are free from looseness.
WARNING
If the supply cord is damaged, it must be replaced by a special cord or assembly available from the manufac-
turer or its service agent.

–18–
1. All wiring must comply with LOCAL REGULATIONS.
2. Select a power source that is capable of supplying the current required by the air conditioner.
3. Feed the power source to the unit via a distribution switch board designed for this purpose.
4. The terminal screws inside the control box may be loose due to vibration during transport.
Check the screws for loose connection.
(Running the air conditioner with loose connection can overload and damage electrical components.)
5. Always ground the air conditioner with a grounding wire and connector to meet the LOCAL REGULATION.
Main power source
Switch box
Refrigerant pipe
Circuit Breaker
Use circuit breaker or time delay fuse.
ELECTRICAL WIRING
CONNECTING THE CABLE TO OUTDOOR UNIT
1. Remove the Cover control from the unit by loosening a
screw.
Connect the wires to the terminals on the control
board individually as following.
2. Secure the cable onto the control board with the hold-
er (clamper).
3. Refix the cover control to the original position with the
screw.
4. Use a recongnized circuit breaker 20A between the
power source and the unit. A disconnection device to
adequately disconnect all supply lines must be fitted.
Outdoor unit
Terminal block
(6P)
Connecting
cable
Cover control
Holder for
connecting
cable

1) Cut the pipes and the cable.
■Use the accessory piping kit or the pipes purchased
locally.
■Measure the distance between the indoor and the out-
door unit.
■Cut the pipes a little longer than measured distance.
■Cut the cable 1.5m longer than the pipe length.
2) Burrs removal
■Completely remove all burrs from the cut cross section
of pipe/tube.
■Put the end of the copper tube/pipe to downward direc-
tion as you remove burrs in order to avoid to let burrs
drop in the tubing.
3) Putting nut on
■Remove flare nuts attached to indoor and outdoor units,
than put them on pipe/tube having completed burr
removal.
(Not possible to put them on after flaring work)
4) Flaring work
■Carry out flaring work using flaring tool as shown below.
Firmly hold copper tube in a bar(or die) as indicated
dimension in the table above.
5) Check
■Compare the flared work with figure below.
■If flare is noted to be defective, cut off the flared section
and do flaring work again.
–19–
Copper
tube
90°Slanted Uneven Rough
Pipe Reamer
Point down
Flare nut
Copper tube
Bar
Copper pipe
Clamp handle Red arrow mark
Cone
Yoke
Handle
Bar
"A"
Inclined
Inside is shining without scratches
Smooth all round
Even length
all round
Surface
damaged Cracked Uneven thickness
= Improper flaring =
•Preparation of Piping
6. Connecting Pipes to the Indoor Unit
Main cause of gas leakage is defect in flaring work. Carry out correct flaring work in the following procedure.
Outside diameter A
mm inch mm
Ø6.35 1/4 0.5~0.8
Ø12.7 1/2 0.8~1.0

–20–
1. Form the piping according to its routing. Avoid bend-
ing and bending back the same piping point more
than three times. (This will result in hardening the
pipe.)
2. After deforming the piping, align centers of the union
fitting of the indoor unit and the piping, and tighten
them firmly with wrenches.
3. Connect pipe to the service valve or ball valve which
is located below the outdoor unit.
4. After completing the piping connection, be sure to
check if there is gas leakage in indoor and outdoor
connection.
After completing the piping connection, execute vacuum
drying for the connecting piping and the indoor unit.
The vacuum drying must be carried out using the ser-
vice ports of both the liquid and gas side valves.
Use two wrenches and tighten with regular torque.
Outdoor
unit
Liquid side
Flare connection
Flare connection
Gas side
Indoor
unit
Union
Flare nut fastening torque
Ø6.35mm 1.8kg.m
Ø9.52mm 4.0kg.m
Ø12.7mm 5.5kg.m
Model Liquid side piping Gas side piping
12K Btu/h Ø6.35mm Ø12.7mm
Piping Connection
Vacuum drying
CAUTION