Impecca ISFC6015X3, ISFC6024X2, ISFC6015X224 User Manual
Flex+ Series R410A
Systems―Outdoor Unit
Owner's Manual Impecca Air
Conditioners
ISMO-6021
Thank you for choosing Impecca air conditioners, please read this owner’s manual carefully
before operation and keep it for future reference.
Impecca reserves the right to interpret this manual which will be subject to any change due
to product improvement without further notice.
v. 1
.1
Preface
Flex + Series adopt the advanced manufacturing technology and takes the environmental-
friendly R410A as refrigerant, which is a green product in the 21st century. Please carefully read
the manual before installation and operation.
1
) Flex + Series systems conform to design standard ARI 210240-2008.
2) To ensure safety when operating this system, please strictly follow the instructions in this
manual.
3) Make sure that the manual is kept by the operators or serviceman.
4) The refrigerant pipes and accessories must be designed exclusively for R410A.
5) The total capacity of the indoor units which runs at the same time cannot exceed the capacity of
the outdoor units; otherwise, the cooling (heating) effect of each indoor unit would be lower
than the nominal capacity.
6) In case of malfunction, please examine the following items and contact our appointed service
centers as soon as possible.
Nameplate (model, cooling capacity, product code, ex-factory date).
Malfunction status (detail description of conditions before and after malfunction occurs).
7) It is a normal phenomenon that the fan of indoor unit will still run for 20~70 seconds after the
indoor unit receives the “stop” signal so as to make full use of the waste heat.
8) When the work mode of the indoors is conflict with the modes of outdoor units, it will be
indicated on the display of the wired controller in five seconds and then the indoor unit will
stop. In this case, please harmonize their work modes: the cooling mode is compatible with the
dry mode.
9) If the supply power fails when the unit is running, then the indoor unit will send the “start”
signal to the outdoor unit three minutes later after the power recovery.
10) The power cable and transmission line must not be twisted together, but instead of separated
with an interval of at least 2cm; otherwise it may be result in communication problem.
11) 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.
12) All graphics and information in this manual are only for reference. Manufacturer reserves the
right for changes in terms of sales or production at any time and without prior notice.
This product must not be disposed together with the domestic waste. This product has
to be disposed at an appointed place for recycling of electrical and electronic appliances.
Thank you for purchasing Impecca air conditioners. Before using, please read
this manual carefully and keep it properly for further reference.
Contents
1 Safety Precautions ..................................................................................................................... 1
2 Attention for Installation ........................................................................................................... 3
2.1 Precautions for R410A .................................................................................................. 3
2.2 Precaution for Installation ............................................................................................. 3
2.3 Precaution for Operation Test........................................................................................ 3
2.4 Accessories .................................................................................................................... 3
3 Product Introduction ................................................................................................................. 4
3.1 Names of Main Parts ..................................................................................................... 4
3.2 Combinations for Outdoor and Indoor Units ................................................................ 4
3.3 Parts and Components of Unit ...................................................................................... 5
3.4 Working Temperature Range ......................................................................................... 5
4 Selection of Installation Location and Precautions ................................................................... 6
4.1 Selection of Installation Location ................................................................................. 6
4.2 Outline Dimension of Outdoor Unit .............................................................................. 7
4.3 Installation and Servicing Space ................................................................................... 7
5 Installation Instruction .............................................................................................................. 8
6 Installation of Refrigerant Pipes ............................................................................................... 9
6.1 Allowable Length and Drop Height of Connecting Pipe .............................................. 9
6.2 Dimension of Connecting Pipe ................................................................................... 10
6.3 Connection of Branch Pipe ......................................................................................... 10
6.4 Connection of Refrigerant Pipes ................................................................................. 11
6.5 Connec
6.6 Leak Test ..................................................................................................................... 13
6.7 Vacuum Operation ....................................................................................................... 13
6.8 Refrigerant Charging ................................................................................................... 14
7 Electrical Wiring Work ........................................................................................................... 17
7.1 Wiring Connection ...................................................................................................... 17
7.2 Requirements of Power Circuit and Cable .................................................................. 17
7.3 Ground Requirements ................................................................................................. 18
7.4 Precautions on the Electrical Wiring Work ................................................................. 18
7.5 Precaution of Laying Wires ......................................................................................... 19
7.6 Procedures for Electrical Wiring Work ....................................................................... 19
8 Design of Drainage Pipeline ................................................................................................... 20
8.1 Installation of Drain Hose ........................................................................................... 20
8.2 Design of Drainage Pipeline ....................................................................................... 20
9 Installation of Protective Layer ............................................................................................... 21
10 Test Operation ......................................................................................................................... 22
10.1 Check after Installation ............................................................................................... 22
10.2 Test Operation ............................................................................................................. 22
11 Testing Board Introduction ..................................................................................................... 23
11.1 Compose of the Testing Board .................................................................................... 23
11.2 Instruction of Function and Data Section .................................................................... 23
tion of Refrigerant Pipe ................................................................................... 12
I
12 Troubleshooting ...................................................................................................................... 24
12.1 Check before Contacting Service Center .................................................................... 24
12.2 Problem Handling ....................................................................................................... 25
12.3 Error Description ......................................................................................................... 25
13 Maintenance ............................................................................................................................ 28
13.1 Outdoor Condenser ..................................................................................................... 28
13.2 Drain Pipe ................................................................................................................... 28
13.3 Check before the Seasonal Use ................................................................................... 28
13.4 Maintenance after Seasonal Use ................................................................................. 28
14 After-sales Service .................................................................................................................. 28
II
1 Safety Precautions
Flex + Series
WARNING
CAUTION
NOTICE
This is t
hazards. Obey all safety messages that follow this symbol to avoid possible injury or
death.
This mark indicates procedures which, if improperly performed, might lead to the
death or serious injury of the user.
This mark indicates procedures which, if improperly performed, might possibly result
in personal harm to the user, or damage to property.
NOTICE is used to address practices not related to personal injury.
he safety alert symbol. It is used to alert you to potential personal injury
WARNING
1) Instructions for installation and use of this product are provided by the manufacturer.
2) Installation must be performed in accordance with the requirements of NEC and CEC by appointed
personnel only.
3) The installation should be left to the appointed service center and according to the instructions given in the
manual. Improper installation may cause fall down, water leakage, electric shock or fire etc.
4) For operating the air conditioner pleasantly, please install it as outlined in this installation manual.
5) The power supply must adopt the special circuit with air switch protection and assure it has enough capacity
6) Connect the indoor unit, BU module and outdoor unit with the room air conditioner piping and cord
available from our standard parts. This installation manual describes the correct connections using the
installation set available from our standard parts.
7) Before installation, check the parameter of power cord and make sure that it complies with the power
supply requirement on the nameplate. Make sure the power supply is safe.
8) This air conditioner must be properly grounded through the receptacle to avoid electric shock. The ground
wire shouldn’t be connected with gas pipe, water pipe, lightning arrester or telephone line.
9) If refrigerant leaks while work is being carried out, ventilate the area. If the refrigerant comes in contact
with a flame, it produces toxic gas.
10) Do not power on until all installation work is complete.
11) During installation, make sure that the refrigerant pipe is attached firmly before you start up the compressor.
Do not operate the compressor under the condition of refrigerant piping not attached properly with valve
open. This may cause abnormal pressure in the refrigeration cycle that leads to breakage and even injury.
12) When installing and relocating the air conditioner, do not mix gases except the specified refrigerant
(R410A) to enter the refrigerant cycle. If air or other gas enters the refrigerant cycle, the pressure inside the
cycle will rise to an abnormally high value and cause breakage, injury, etc.
13) 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.
14) Never cut off or damage power cables and transmission wires. If the power cable or transmission line were
damaged, it must be replaced by the manufacturer, its service agent or similarly qualified persons in order to
avoid a hazard.
15) After the power cord is connected, please install the cover of electric box to avoid danger.
1
Flex + Series
16) When installing or relocating the unit, please contact the appointed service center for the repair or
relocation. Meanwhile the specialized parts and accessories must be used. Otherwise, it may result in water
leakage, electric shock or fire hazard.
17) Diameter of power cord must be large enough. Damaged power cord or connecting wire must be replaced
by specialized electric cable.
18) The power wire and transmission line must be more than one meter away from televisions or radios which
can emit electromagnetic waves to prevent image interference or noise. Otherwise, the unit maybe not work
19) Nitrogen must be charged according to technical requirements.
20) For units with wired controllers, do not connect power supply until the wired controller is well installed.
Otherwise, the wired controller cannot be used.
21) When installation is finished, please check and make sure the drain pipe, pipeline and electric wire are all
well connected so as to avoid water leakage, refrigerant leakage, electric shock and fire hazard.
22) Never extend fingers or objects into air outlet or return air grille.
23) Please keep the room well-ventilated and it could avoid oxygen deficit.
24) Never start or stop the air conditioner by inserting or removing the power cord.
25) Before startup of the compressor, please turn on the main power switch of the unit for more than 8 hours
and it makes sure that the heater belt of the compressor has been energized for at least eight hours! Once the
compressor is started, it must be guaranteed that it works continuously for at least 30 minutes, otherwise it
would be damaged!
26) Never operate the unit with wet hands. Otherwise, it may cause electric shock.
27) Before cleaning and repairing, it is necessary to stop working and turn off the power supply. Otherwise, it
may cause electric shock or damage.
28) Do not spray water on the air conditioner or it will cause malfunction or electric shock.
29) The air conditioner is not support to install in the circumstances as the following that where there is full of
mist of oil, damp or corrosive gas, flammable gases, the acidic or alkaline vapor and the ocean.
30) Volatile liquid like thinner or gasoline will damage the appearance of air conditioner. (Please use soft dry
cloth and wet cloth with mild detergent to clean unit’s appearance.)
31) Never standing or place objects on outdoor unit. Person or objects falling from the unit may cause injury.
32) If abnormal condition occurs (e.g. unpleasant smell), please turn off the unit at once and disconnect power
supply. Then contact appointed service center. If the air conditioner continues to operate despite of
abnormal condition, it may be damaged and cause electric shock or fire hazard.
33) The drain pipe should be installed as instructed in the manual to guarantee the proper drainage; meanwhile
it should be insulated to prevent condensing; otherwise the improper installation would cause water leakage
and then wet the household wares in the room.
34) Don't attempt to repair the air conditioner by yourself. The improper repair will lead to electric shock or
fire, please contact the appointed service center and ask professional technicians to repair it.
35) Please take notice of the installation foundation of the unit after long use, if it is damaged, it may lead to the
fall of the unit and cause the injury.
36) Be sure to shut off the power supply when you do not use the air conditioner for a long time. Otherwise, the
dusts may accumulate in it, which may cause overheating or fire hazards.
37) Impecca is not responsible for any personal injury or property loss caused by improper installation,
improper debugging, unnecessary repair or not following the instruction
s of this manual.
2
Flex + Series
2 Attention for Installation
2.1 Precautions for R410A
It is very strict that the refrigerant pipes should be clean and dry.
It does not support to let a lot of refrigerant go into the ambient atmosphere, because it will
2.2 Precaution for Installation
The unit is so heavy that it is more than 110kg, so more than two persons will be needed to
When remove the units, please place the hands on the corner and take care not to hurt the hands
It is very likely to dispose the waste to the garbage bin after the installation.
e R410A is a mixed refrigerant, when adding the refrigerant to the unit, it must be
Th
in its liquid state. If the refrigerant is in gas state, the composition has been changed and the
capability of the unit will decrease.
When the refrig
frostbite.
strengthen the green house effect. Otherwise, it will produce toxic gas when the refrigerant
contacts with the fire.
remove the unit. The package cannot bear it, so do not grasping it.
by the fins.
erant leaks out, please do not touch the leakage. Otherwise, it will result in
2.3 Precaution for Operation Test
In order to protect the compressor from vibrating during transportation and 2 metal gaskets are
used. They must be removed prior to commissioning and tied back the nut firmly; otherwise the unit
might not be operated well.
2.4 Accessories
For the accessories of the air conditioner, please look out the Packing List in the package.
3
Flex + Series
3 Product Introduction
Impecca Flex + Series adopts inverter compressor technology. According to change
The
displacement of compressor, stepless capacity regulation within range of 10%～100% can be
realized. Various product lineups are provided with capacity range from 14kW to 16kW, which
can be widely used in residential house, business office, hotel and where especially applicable
to the place with variable load change. Impecca air conditioner is absolutely your best choice.
3.1 Names of Main Parts
NO. ① ② ③ ④ ⑤
Name Fan motor Axial flow fan blade Electrical box
Fig. 1
Gas side stop
valve
Liquid side stop
3.2 Combinations for Outdoor and Indoor Units
Table 1
Sorts GWHD(56S)ND3CO
No. of indoor units to be
connected
No. of BU modules to be
connected
Total capacity of indoor units to
be connected(Btu/h)
Min 2
Max 9
Min 1
Max 3
Min 28000
Max 81000
valve
Flex + Series
Parts and Components of Unit
3.3
For the Flex + Series, one outdoor unit is able to drive up to three BU modules and nine
indoor units which include cassette type, duct type, wall mounted type, floor ceiling type and
console type. The outdoor unit will run as long as any one indoor unit receives the running
command, and all indoor units stop once the outdoor unit is turned off.
Power supply wire for outdoor
unit and BU module(3 wires)
Connection pipe
Transmission line(2 wires)
Power supply wire for
indoor unit(4 wires)
BU 3
Indoor unit
Duct type
Wall mounted
type
Floor ceiling
type
Console type
Outdoor unit
Ground
The 2nd
branch
The 1st
branch
Power
(60Hz, 208/230V)
Ground
Power
(60Hz, 208/230V)
BU 2
Ground
Power
(60Hz, 208/230V)
BU 1
Ground
Power
(60Hz, 208/230V)
Fig. 2
Wall mounted
type
Cassette type
Cassette type
Duct type
Wall mounted
type
3.4 Working Temperature Range
Maximum cooling 48℃(118℉)
Minimum cooling -18℃(0℉)
Maximum heating 24℃(75℉)
Minimum heating -20℃(-4℉)
Table 2
(BD :erutarepmet edistuO stroS ℃/℉)
5
Flex + Series
4 Selection of Installation Location and Precautions
WARNING
1) The installation of the air conditioner must be in accordance with the national and local laws and
regulations.
2) The quality of the installation will affect the capability of air conditioner directly. The installation
should be left to the appointed service center. Please contact your dealer after purchasing this machine.
Professional installation workers will provide installation and test services according to the installation
manual.
3) The air conditioner should not install in this place where the small animals exist, because they may
cause malfunctions, smoke or fire. Please keep the area around the unit clean.
4.1 Selection of Installation Location
WARNING
1) The outdoor unit must be installed on a firm and solid support which can withstand the weight,
meanwhile the mounting surface must be horizontal plane. Otherwise, the unit would fall down and
cause injury or death.
2) The location must be out of children’s reach, please keep the unit away from children.
3) During installation, if the outdoor unit has to be exposed to strong wind, it must be fixed securely.
4) There is enough space for the installation and maintenance. Meanwhile, there is not any obstacle near
the air inlet and outlet of the indoor and outdoor units.
5) The place should be well-ventilated, so the machine can absorb and discharge sufficient air.
6) Avoid place the outdoor unit under the windows or between the constructions, hence to prevent normal
operating noise from entering the room.
7) When strong winds of 5 m/sec or more exist in the place of the installation, the outlet of the unit cannot
face the wind. If the wind blows against the outdoor unit's air outlet, it will cause deterioration of the
operational capacity and maybe break the fan.
8) Do not install in the place where there is heat source, flammable or explosive gas, a place subject to
severe dust, salty fog and polluted air.
9) Installation at the following places might lead to the air conditioner malfunction, such as where is full of
machine oil, saline-sodic soil near the sea, sulphide fog, high frequency facilities or special conditions.
If it is unavoidable, please contact the appointed service center.
NOTICE
1) It is better that do not install the unit where it will be exposed to direct sunlight. (If necessary, please
install a blind that does not interfere with the air flow.)
2) The unit should be free from getting dirty or getting wet by rain as much as possible
3) Outdoor unit shall be installed close to the indoor unit, hence to minimize the length and bends of
cooling pipe.
4) Do not place animals and plants in the path of the air inlet and outlet of the units.
5) Make sure that the unit will not cause any operating vibration or noise after installation.
6
4.2 Outline Dimension of Outdoor Unit
Flex + Series
3 (unit: mm/inch)
Fig.
4.3 Installation and Servicing Space
1) In case of installing only one unit
In case obstacles exist around the unit, the required installation space is in the Fig. 4.
2) In case of installing multiple units(2 units or more)
In case multiple rows of series installation, the required installation space is in the Fig. 5.
Fig. 4 (unit: mm) Fig. 5 (unit: mm)
7
Flex + Series
5 Installation Instruction
1) Check the installation location and ensure it is strength and level, so that the unit will not cause
any operating vibration or noise after installation.
2) In accordance with the foundation drawing in the following figure, please drill 4 holes in the
installation location.
A
: The outlet side B: Bottom view (mm) C: Drain hole
Fig. 6
3) Fix the unit securely with the foundation bolts. You can get the M10 or M12 foundation bolts,
nuts and washers from the market.
Fig. 7
4) Rub
5) Screw the foundation bolts into the ground and it is better that its length is less than 20mm
ber or spring shock absorbers should be used during the installation of the outdoor unit to
meet the noise and vibration requirements.
(4/5inch) from the foundation face.
8
6 Installation of Refrigerant Pipes
6.1 Allowable Length and Drop Height of Connecting Pipe
Flex + Series
Maximum
allowable
length
Maximum
allowable
length
Minimum
allowable
length
Fig. 8 (8 indoor units)
Table 3
The sorts The pipes Length(m/feet)
Total length between outdoor unit and BU
modules
Total length between indoor units and
BU
Between indoor unit and BU module 1A;1B;1C;2A;2B;2C;3A;3B ≤15(49)
Between indoor unit and the 1st branch
Between outdoor and indoor units H1 ≤30(99)
Between outdoor units and BU modules H2 ≤30(99)
Between BU and BU modules H3 ≤15(49)
Between indoor and indoor units H4 ≤15(49)
Between outdoor and the 1st branch L1 ≥5(16)
Between BU and the branch L3;L4;L5
L1+L2+L3+L4+L5 ≤55(181)
1A+1B+1C+2A+2B+2C+
3A+3B
L4+1B;L2+L5+2A;
L2+L3+3B
≤90(295)
≤40(131)
as possible as
short
NOTICE! BU module should be placed within the level between the outdoor unit and indoor
unit.
9
Flex + Series
6.2 Dimension of Connecting Pipe
Sorts
Table 4
Gas Pipe
（mm/inch）
Liquid Pipe
（mm/inch）
Outdoor unit
Between outdoor unit and the
1st branch
Between the 1st and the 2nd
branch
ISMO-6021
The pipe L1 Φ19.05(3/4) Φ9.52(3/8)
The pipe L2 Φ15.9(5/8) Φ9.52(3/8)
Φ15.9(5/8) Φ9.52(3/8)
6.3 Connection of Branch Pipe
1) If two or three BU modules used, Y-type branch pipe of FQ01A/A will be chosen.
FQ01A/A (Liquid pipe) FQ01A/A (Gas pipe)
Fig. 9
2) Y-type branch pipe is equipped with auxiliary tubes to adjust the diameter of different pipes. If
the dimension of the pipe selected is different from the dimension of branch pipe joint, Cut the
copper tube in the middle with tube cutter and clear up burrs. Please do that as following figure.
Fig. 10
3) Y
-type branch pipe must be installed in vertical or horizontal direction. In the inlet of the branch
pipe, keep at least 500mm straight pipe.
Fig. 11
10
Flex + Series
6.4 Connection of Refrigerant Pipes
CAUTION
1) Conform to the following principles during pipe connection: Outdoor unit shall be installed close to the
indoor unit, hence to minimize the length and bends of connection pipes; the height gap of outdoor unit
and indoor units should be as small as possible; the radius of curvature should be as large as possible.
2) The brazing operation must be strictly in accordance with the process requirements. Rosin joint or pin
hole is not allowed.
3) During the installation, do not damage the pipeline. The pipeline’s radius of bending must be over than
200mm(8inch). The pipes cannot repeatedly be bent or straightened. Otherwise it will get harden and
crack. Do not bend or straight the pipes for more than 3 times at the same position.
1) The process of flaring
① Using the tube cutter to cut the connecting pipe in the appropriate place and remove the burrs.
② Install the nut before the flaring operation.
③ Check the flared portion, whether there is fractured or not.
Fig. 12
2) Precaution for elbow operation
① The elbow operation could be done by hands. Be careful and do not damage the pipe.
Fig. 13
② If the thermal insulation of the refrigerant pipe is not removed, please do not bend the pipe.
Otherwise, it maybe leads the pipe to crack. It is better to make an incision with a knife in the
thermal insulation and removes it. After elbow operation is finished, recover the thermal
insulation with binding band.
3) The process of install refrigerant pipes
① Remove the screw caps from the pipes.
② Align the flared end of copper tube with the center of pipe joint. Tighten the nuts by hands. (If
the flared end of copper tube and the center of pipe joint are not in coaxial, it is hard to tighten
the nuts by hands, please do not tighten it with spanners, because the screw thread may be
broken by force).
③ Tighten the flaring nuts with torque wrench until you hear a “click”. (The spanner and torque
11
Flex + Series
wrench should be perpendicular to the refrigerant pipeline).
④ The following table for the torque required to tighten the nuts.
Table 5
Pipe
diameter
(mm/inch)
Φ6.35(1/4) ≥0.8(1/32) 15～30(11~22)
Φ9.52(3/8) ≥0.8(1/32) 35～40(26~29)
Φ12.7(1/2) ≥0.8(1/32) 45～50(33~37)
Φ15.9(5/8) ≥1.0(1/25) 60～65(44~48)
Φ19.05(3/4) ≥1.0(1/25) 70～75(52~55)
Thickness of
copper
tube(mm/inch)
Tightening
torque
(N·m/1bf·ft)
Fig. 14
CAUTION
1) During the connection of the indoor unit and BU module to the refrigerant pipe, never pull any joints of
the indoor unit and the BU module by force; otherwise the capillary pipe or other pipe may crack,
which then would result in leakage.
2) The refrigerant pipe should be supported by brackets, that is, don’t let the unit withstand the weight of
it.
3) For the Flex + Series, each pipe should be labeled to tell which system it belongs to avoid
mistaken inaccurate piping.
6.5 Connection of Refrigerant Pipe
12
Flex + Series
NO. ① ② ③ ④
Name Coping plate Rear side plate Front side plate Gas side stop valve
NO. ⑤ ⑥ ⑦
Name Liquid side stop valve Right connection board Front connection board
NO. A B C D
Name Front connection Bottom connection Side connection Rear connection
Fig. 15
1) Unscrew the coping plate, front side plate, right connection board and front connection board.
2) The refrigerant pipes can be installed in four directions, please choose the proper direction.
3) Knock the holes in the plate of the chosen direction with the drill and hammer.
4) Connect the pipes to the stop valves.
5) Bend the pipes to go through the knockout holes.
6) Cover the through-holes with sealing materials to prevent the water, dust or small animals going
into the outdoor unit.
6.6 Leak Test
1) Please make sure that the stop valves of the outdoor unit are closed during the operation.
2) The leak test should be made by pressurizing nitrogen gas.
oxygen, C
3) Turn on the Hi-knob and Lo-knob.
at both the gas and liquid stop valves.
4) Open the pressure reducing valve, pressurize the connection pipes to 1.0 MPa (10 bar) slowly,
wait fifteen minutes, and make sure that the pressure will not drop.
5) Rise the pressure to 4.0 MPa (40 bar) slowly, wait 24 hours and make sure the pressure will not
drop
6) If the pressure does not decrease, the pipes have passed the test. Otherwise, look for where the
gas leaks from.
1: Outdoor unit
2: Liquid side stop valve
3: Gas side stop valve
4: Pressure-vacuum gauge
5: Hi-knob
6: Lo-knob
7: Pressure reducing valve
8: Nitrogen
or other dangerous gas into the refrigerant circuit.
2H2
NOTICE! The leak test should be done simultaneously
WARNING! Do not mix
Fig. 16
6.7 Vacuum Operation
1) Make sure the stop valves of the outdoor unit are closed fully during the operation.
2) As shown in the following figure, expel the gas from the refrigerant pipes by the vacuum pump.
3) Open the pump and turn on the knobs to evacuate the gas in the liquid and gas pipes.
The vacuuming should be done simultaneously at both the gas and liquid stop valves.
4) When the pressure of the system is less than -0.1Mpa (-1bar), keep the system for more than
13
NOTICE!
Flex + Series
one hour under the condition.
1: Outdoor unit
2: Liquid side stop valve
3: Gas side stop valve
4: Pressure-vacuum gauge
5: Hi-knob
6: Lo-knob
7: Vacuum pump
Fig. 17
5) Turn off the knobs firstly and then the pump, and if the pressure of the pressure-vacuum gauge
does not rise within 2 hours, the system is under a vacuum. Otherwise, the system has leaked,
please look for where the gas leaks in.
6.8 Refrigerant Charging
The refrigerant has been charged into the outdoor unit before shipped from the manufacturer,
while additional refrigerant still need be charged into the refrigerant pipe in the field installation.
6.8.1 Calculation of the Additional Refrigerant Charging
et the refrigerant charge of the outdoor unit from the nameplate.
1) G
NOTICE
1) The refrigerant charge of the outdoor unit does not include the charged additionally in the indoor unit,
BU module and the refrigerant pipe.
2) For the length of the connecting pipe is decided on the field, the amount of additional refrigerant shall
be decided depending on the dimension and the length of the liquid pipe used on the field.
3) It does not need to add refrigerant if the total length of liquid pipe is within 30m (98-3/8feet).
4) Record the amount of additional refrigerant for convenience of future maintenance.
2) Calculating the Mass of Additional Refrigerant
Additional Refrigerant Charge (kg/oz) =
(0.020oz/inch)+
Σ the Liquid Pipe Length of Φ9.52×0.054kg/m (0.048oz/inch)-1.47kg(51.86oz)
NOTICE! If the additional refrigerant charge is negative, it does not need to add refrigerant.
3) Example: GWHD(56S)ND3CO
Σ the Liquid Pipe Length of Φ6.35 ×0.022kg/m
Fig. 18
14
Flex + Series
Table 6
Serial No. Model
Indoor unit 1 Cassette type
Indoor unit 2 Duct type
Indoor unit 3 Wall mounted type
Indoor unit 4 Wall mounted type
Indoor unit 5 Duct type
Indoor unit 6 Wall mounted type
Table 7
Serial Diameter(mm/inch) Length(m/feet)
L1 Φ9.52(3/8) 20(65-5/8)
L2 Φ9.52(3/8) 10(32-3/4)
L4 Φ9.52(3/8) 10(32-3/4)
1A Φ6.35(1/4) 5(16-3/8)
1B Φ6.35(1/4) 5(16-3/8)
1C Φ6.35(1/4) 5(16-3/8)
2A Φ6.35(1/4) 5(16-3/8)
2B Φ6.35(1/4) 5(16-3/8)
2C Φ6.35(1/4) 5(16-3/8)
The total length of the liquid pipes: 20+10+10+5+5+5+5+5+5=70m (229-5/8feet).
Thus, the total length is over than 30m (98-3/8feet), so the air conditioner needs to add refrigerant.
Additional refrigerant charge
N/A
N/A
ISMI-C15
ISMI-W092
ISMI-W092
ISMI-W092
Σ the Liquid Pipe Length of Φ6.35×0.022kg/m +Σ the Liquid Pipe Length of Φ9.52×0.054kg/m
-1.47kg
=(5+5+5+5+5+5)(m)×0.022kg/m+(20+10+10)(m)×0.054kg/m-1.47kg
=1.35kg (47.63oz)
4) Additional refrigerant charge record for future maintenance
Table 8
Diameter(mm) Total length(m/feet) Additional refrigerant charge(kg/oz)
Φ6.35(1/4)
Φ9.52(3/8)
Total
6.8.2 Proced
ures for adding refrigerant
15
Flex + Series
NO. 1 2 3 4 5
Name
NO. 6 7 8 9
Name Hi-knob Lo-knob R410A tank Scale
1) When the liquid and gas stop valves have not been opened, the system is under the vacuum:
① Refer to the left of the figure above; connect the R410A tank to the system.
② Turn on the R410A tank and the Hi-knob; charge the R410A refrigerant into the unit from the
liquid side stop valve. The Lo-knob should be closed completely.
③ Turn off the R410A tank and the Hi-knob immediately, when the adding refrigerant is enough.
④ Turn on the liquid and gas side stop valves in an anticlockwise direction slowly and completely.
2) If the pressure of the system is too high to charge refrigerant, you can do as follow.
① Turn on the liquid and gas side stop valves in an anticlockwise direction slowly and completely.
② Turn on the power of the air conditioner, and set cooling mode, running more than 0.5h when
outside temperature is higher than 15℃(59℉) DB.
a) Refer to the left of the figure above; connect the R410A tank to the system.
b) Turn on the R410A tank and the Lo-knob; charge the R410A refrigerant into the unit from
c) Turn off the R410A tank and the Lo-knob immediately, when adding refrigerant is enough.
③ Turn on the power of the air conditioner, and set heating mode, running more than 0.5h when
outside temperature is lower than 15℃(59℉) DB.
a) Refer to the right of the figure above; connect the R410A tank to the system.
b) Turn on the R410A tank and the Hi-knob; charge the R410A refrigerant into the unit from
c) Turn off the R410A tank and the Hi-knob immediately, when adding refrigerant is enough.
Outdoor
unit
the gas side stop valve. The Hi-knob should be closed completely.
the service port. The Lo-knob should be closed completely.
Service port
Liquid side stop
valve
Fig. 19
Gas side stop
valve
Pressure-vacuum
gauge
CAUTION
1) Make sure that the liquid and gas side stop valves are opened completely after the installation.
2) Make sure that the length of liquid pipe is exactly.
3) Additional refrigerant charge must be measured exactly.
4) Make sure that the refrigerant which charge into the unit is in liquid state.
5) Please prevent the refrigerant leakage away from your body when remove the charging hose.
6) Please heat the refrigerant tank with hot water or hot air when the outside temperature is too low.
However, it must be forbidden to heat with fire directly, otherwise it may lead to explosion.
16
7 Electrical Wiring Work
7.1 Wiring Connection
Flex + Series
NOTICE! The “L1”, “3” terminals are connected to the live wire, the “L2”,”N(1)” terminals
are connected to the neutral wire and the ”2” terminal is connected to the transmission line.
Fig. 20
7.2 Requirements of Power Circuit and Cable
Table 9
Phase and frequency 1Ph,60Hz
Voltage 208/230V
40A
2
2
2
Recommended cable of outdoor unit (Pieces × Sectional area)
Recommended cable of BU module
(Pieces × Sectional area)
Transmission line (Pieces × Sectional area) 2×1.5 mm2
Recommended cable of indoor unit
(Pieces × Sectional area)
ISMO-6021
Capacity of the air switch
BU module 10A
3×6.0 mm
3×0.75 mm
4×0.75mm
NOTICE
1) The total length of the transmission line between the outdoor unit and the furthest BU module is not
more than 55m (180feet). Otherwise, the system cannot work possibility.
2) The specifications of the power cable and transmission line listed in the table above are determined
based on the maximum power (maximum amps) of the unit.
17
Flex + Series
3) The specifications of the power cable listed in the table above are applied to the conduit-guarded
multi-wire copper cable (like, YJV copper cable, consisting of PE insulated wires and a PVC cable
jacket) used at 40℃(104℉) and resistible to 90℃(194℉), and shall be at least those of ordinary
polychloroprene sheathed cords. If the working condition changes, they should be modified according
to the related national standard.
4) The specifications of the air switch listed in the table above are applied to the breaker with the working
temperature at 40℃(104℉). If the working condition changes, they should be modified according to the
related national standard.
5) The length of the recommended power cable should be less than 15meters (49feet); otherwise, the
diameter of the power cable is not enough.
6) Mentioned power cable and transmission line length is just a reference value. It may be different
depending on the condition of installation, humidity or materials, etc.
7) An all-pole disconnection switch having a contact separation of at least 3mm in all poles should be
connected in fixed wiring.
7.3 Ground Requirements
WARNING
1) The air conditioner is classified into the Class I appliances, so its ground ways must be reliable.
2) The ground wire must be fixed on the screw hole with the sign as the right figure.
3) The yellow-green wire of the air conditioner is the ground wire and must be fixed by the tapping screw.
And it cannot be used for other purpose or cut off. Otherwise, it will cause the hazard of electric shock.
4) The reliable ground terminal should be provided and the ground wire cannot be connected to any of the
following places: a. Water pipe; b. Coal gas pipe; c. Sewage pipe; d. Lightning rod
e. Telephone line f. Other unreliable places considered by a professional.
7.4 Precautions on the Electrical Wiring Work
WARNING
1) The electrical installation should be carried out by the professional as instructed by the local laws,
regulations and also this manual.
2) The ground connection should be reliable and the ground wire should be connected to the dedicated
device of the building by the professional.
3) Before starting work, the power must not be supplied to the unit.
4) The air switch coupled with the leakage current protection switch must be equipped in the circuits,
which is of enough capacity and of both magnetic and thermal tripping functions in case of the short
circuit and overload.
5) The electrical work should use a cable length enough to cover the entire distance with no connection. If
it is unavoidable, please make sure the connection should be reliable, the external forces will not act on
the wires and the joint is not bared. Otherwise it will cause electrical shock or fire etc.
6) The power cable with the rated voltage and exclusive circuit for the air conditioner should be used.
7) Do not pull the power cable by force after it is installed.
8) The diameter of the power cable should be large enough and once it is damaged, it must be replaced by
the dedicated one.
9) The multi-wire copper cable should be used for the power cable and the transmission line.
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Flex + Series
7.5 Precaution of Laying Wires
1) Use a wire stripper to strip off a length of the insulation layer at the end of the wires;
2) Loosen the screws on the terminal block of the air conditioner;
3) Press the ends of the cable tightly onto the round terminals corresponding to the size of the
screws.
4) Pass the screw through the round terminals and fix it onto the terminal block.
Fig. 21
7.6 Procedures for Electrical Wiring Work
1) Knock the holes in the plate of the chosen direction with the hammer.
2) Place the rubber ring on the knockout hole.
3) Let the power cable and transmission line go through the knockout hole.
4) Connect the power cable of the outdoor unit to the L1, L2 terminals with the sign of the XT1
and as well as the ground screw.
5) Connect the transmission line of the outdoor unit to the N(1), 2 terminals with the sign of the
XT2.
6) Fix the power cable and transmission line firmly by cable fixing clip. In order to protect the
power cable and transmission line from damage by the pipes or others, an interval of at least
2cm (3/4inch) away is essential.
7) Screw the coping plate, front side plate, right connection board, front connection board back.
8) Cover the through-holes with sealing materials to prevent the water, dust or small animals going
into the outdoor unit.
CAUTION
1) The transmission line and the power cable must be separated with an interval of at least 2cm (3/4inch);
otherwise it may be result in communication problem.
2) In order to protect the power cable and transmission line from damaging by the knockout hole, the
rubber ring must be placed on the hole. Otherwise, it may cause electrical shock or fire etc.
3) The power wire and transmission line must be more than 1 meter (3-1/4feet) away from televisions or
radios which can emit electromagnetic waves to prevent image interference or noise. Otherwise, the unit
maybe cannot work.
4) Confirm the each cable connected to the terminal screw is exactly and securely after finishing the
electric work.
5) Fix each ground wire separately with the ground screw.
6) If the connecting wire is connected to the terminal incorrectly, it may cause a fire.
19
Flex + Series
8 Design of Drainage Pipeline
8.1 Installation of Drain Hose
1) Choose one drain hole in the bottom of the outdoor unit.
2) Connect the drain hose to the drain hole.
3) The drain hose should be kept at 5~10 degrees of gradient to facilitate discharge of the
condensing water. Take care that does not exert too much force on the hose.
4) Thermal insulation materials should be placed at the joints of the drain hose so as to prevent
from dew condensation. Fix the drain hose firmly by binding band.
Fig. 22
5) The
end of the drain hose should be inserted into the hole of drainage pipeline.
8.2 Design of Drainage Pipeline
1) The drainage pipeline should be kept at a certain gradient (1/50—1/100) so as to avoid bulges
of pipes where there might be water bends.
2) The drainage pipeline is form of the hard PVC pipes for common purposes which can be
purchased locally. The diameter of the PVC pipes is not less than 17mm (11/16inch) and the
pipeline should be fixed as close to the BU module as possible.
3) Insert the drain hose into the drain hole of drainage pipeline. Use binding band to fix it tightly.
It is not allowed to use adhesive glue to join the drain hose to the drainage hole.
4) When
the drainage pipeline is laid for a couple
should be approximately 100mm lower than the drainage hole of each module. In this case,
some special-purpose pipes with thicker walls will be used.
of units, the position of the shared pipeline
NOTICE! At intervals of about 1 meter (3-1/4feet), fix the drain pipes to the wall with
brackets, not floating in the air.
20
Flex + Series
9 Installation of Protective Layer
1) The refrigerant pipes should be insulated by the heat insulation material and plastic tape in
order to prevent water condensation and leakage.
2) Do not use the foam on the branch pipe as the material for heat insulation, heat insulation
material of branches should be the same as that of the pipeline.
NOTICE! The heat resistance of heat insulation material should be over than 120℃(248℉)
and its thickness is more than 9mm(3/8inch).
3) The joints of the system should be wrapped with the heat insulation material and no gap is
allowed on the joint of the system, as shown in the following figure.
Fig. 23
4) Bun
5) Wrap the pipe from the bottom of the outdoor unit to the top of the pipe where it enters the wall.
dle the refrigerant pipe and transmission line together with tape, and separate them from the
drain pipe to prevent the condensate water overflowing.
During the wrapping, the later circle should cover half of the former one.
CAUTION
1) At intervals of about 1 meter (3-1/4feet), fix the refrigerant pipes to the wall with brackets, that is, don’t
let the unit withstand the weight of it or float it in the air.
2) After the pipe is protected well enough, never bend it to form a small angle(＜90°), otherwise it would
crack or break.
3) Do not wrap the refrigerant pipes very tight, otherwise the insulation effect would be weakened.
Additionally, make sure the drain hose is separated from the refrigerant pipes.
4) After that, cover the hole on the wall with sealing materials to prevent wind and noise going into the
room.
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Flex + Series
10 Test Operation
10.1 Check after Installation
Table 10
Items to be checked Possible malfunction
Has it been fixed reliable? The unit may drop, vibrate or make noise.
Has the gas leakage been checked? It may cause insufficient cooling(heating) capacity.
Is the thermal insulation of the unit sufficient? It may cause condensation and dripping.
Is the drainage well? It may cause condensation and dripping.
Is the voltage in accordance with the rated
voltage marked on the nameplate?
Are the lines and pipelines correctly installed?
Has the unit been safely grounded? It may cause electrical leakage.
Are the models of lines in conformity with
requirements?
Are there any obstacles near the air inlet and
outlet of the indoor and outdoor units?
Have the length of connection pipes and
refrigerant charge amount been recorded?
It may cause electric malfunction or the
components may be burned out
It may cause electric malfunction or the
components may be burned out
It may cause electric malfunction or the
components may be burned out
It may cause insufficient cooling(heating) capacity.
It is not easy to decide the charge amount of
refrigerant.
10.2 Test Operation
1) Before test operation
The appearance of the unit and the refrigerant pipes cannot be damaged during the installation.
Do not switch on power before installation is finished completely.
Electrical wiring must be connected correctly and securely.
The stop valves of the outdoor unit should be opened fully.
All the impurities such as scraps and thrums must be cleared from the unit.
2) Test operation method
① The test operation should be carried out by the professionally skilled personnel on the premise
that all items listed above are in normal conditions.
② Set the status of the power supply switch as “ON” eight hours before the start of operation
③ Press mode button, to select the COOL, or HEAT. Whether the air conditioner is work
normally or not.
The fan motor of the indoor unit will run automatically in one minute.
The fan motor and compressor of the outdoor unit will run automatically in one minute.
④ Make sure that every combination of indoor units can work well.
WARNING
If the unit cannot work nor has any abnormal noise after the compressor is started, turn off the unit for an
immediate check.
22
Flex + Series
11 Testing Board Introduction
11.1 Compose of the Testing Board
The testing board is in front of electrical box and can be observed well. It has several following
advantages: detect indoor unit numbers and indoor unit address, displays real running function and
error code automatically. It is composed of the function section, data section and button section.
Function section
Data section Button section
11.2 Instruction of Function and Data Section
Running state The display of function section The display of data section
① If the function section displays the
numbers of the indoor units, the data
section will display the outside
temperature. For example, the “35” is
represented of 35℃.
② If the function section displays the
address of the indoor unit，the data
section will display the model of the
indoor unit, for example, the “35” is
represented of 35 model.
It displays the target gear of the
compressor. If the gear is zero, it will
display “0”. For example, the gear is
the fifteenth; it will display “15”. The
range of the gear is from 0 to 60.
Stop
Normal
① The section will display the numbers of the
indoor units which have established
communication with the outdoor unit. For
example, if there are seven established indoor
units, the section will display “7”.
② It will display the address of the indoor units
by turns. For example, the “1b” is represented
of the indoor unit 1B.
(BU module:1/2/3，Indoor unit: A/b/C/d/E)
The code of running state:
Code
UE
UP Pump down F7 Oil returning
UC Cooling H1 Defrosting
Running
state
Pressure
equalization
Code Running state
UH Heating
Malfunction
If the malfunction occurs in the system, the
section will display the error code. If there are
several malfunctions, it will display the error
codes by turns at intervals of 2 seconds.
23
① If the malfunction occurs in the
outdoor unit, the section displays
nothing;
② If the malfunction occurs in the
indoor units, the section displays the
address of the indoor unit.
Flex + Series
12 Troubleshooting
WARNING
1) In the event of abnormal conditions (like, stinky smell), please shut off the power supply immediately
and then contact the appointed service center; otherwise, the abnormal running would damage the air
conditioner and also would cause electric shock or fire hazard .
2) Do not repair the air conditioning personally but instead contact the professionally skilled personnel at
the appointed service center, as the incorrect repair would cause electric shock or fire hazard etc.
12.1 Check before Contacting Service Center
Please check the following items before contacting the maintenance serviceman.
Conditions Causes Corrective actions
Broken fuse or breaker is off
Power off
The unit does not
run at all
The unit stops
soon after it starts
Cooling or heating
is abnormal
Power supply plug is loose Plug the power supply properly
The batteries voltage of the remote
controller is insufficient
Remote controller is out of the control
scope
Air inlet or outlet of indoor unit or
outdoor unit is blocked
Air inlet or outlet of indoor unit or
outdoor unit is blocked
Temperature setting is improper
Air speed is set too low
Improper airflow direction
Door or window is open Close the door or window
Under direct sunshine
Too many people in the room
Too many heat sources indoors Reduce the heat sources
The filter screen is dirt or blocked Clean the filter screen
NOTICE! If the air conditioner still runs abnormally after the above check and handling,
please contact the local appointed service center and also give a description of the error
occurred as well as the model of the unit.
Replace the damaged fuse or
close the breaker
Restart the unit after power
supply resumes
Replace with new batteries
The distance shall be within 8m
Remove the obstacles
Remove the obstacles
Adjust the setting of remote
controller or wire controller
Adjust the setting of remote
controller or wire controller
Adjust the setting of remote
controller or wire controller
Hang curtain or blinders over the
window
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