Ramsond R74GW3 Use and care manual

INSTALLATION AND REPAIR GUIDE
Split Wall-Mounted Air Conditioner

Foreword
Selection of installation positions for indoor unit
Selection of installation positions for outdoor unit
Installation fixture of indoor unit
Installation fixture of outdoor unit
Ordinary pipelines connection & Air purging
Pipelines connection for Split type quick coupler model
Pipelines connection for Whole-Unit type quick coupler model
Connection of power cable
Finishing touches and test running
Is the unit installed correctly?
Self diagnosis functions
Quick connector installation instruction
Installation Guide
CONTENTS
Air conditioners are units that should have the professional technicians do the
installation for you.
This Instruction Guide is the universal-purpose version for the models of split
wall-mounted air conditioners manufactured by our Co. The appearance of the
units that you purchase might be slightly different from the ones described in
the Guide, but it does not affect your proper operations and usage.
Please read carefully the sections corresponding to the specific model you
choose, and keep the Guide properly so as to facilitate your reference at later
time.
1
2
3
4
4
6
7
8
8
9
10
11
12

1
* Selection of installation positions for indoor unit *
* To be installed at the position where the air delivered from the unit can reach every corner of
the room;
* To avoid being affected by the outdoor air;
* To avoid blockage to the air inlet or outlet of the unit;
* To avoid too much oil smoke or steam;
* To avoid possible generation, inflow, lingering or leakage of flammable gases;
* To avoid high-frequency facilities (such as high frequency arc welders, etc.);
* To avoid the places where acid solutions are frequently used;
* To avoid the places where some special sprayers (sulfides) are frequently used.
* Not to install on top of the musical instruments,TV,computer etc.valuable appliance.
* Not to install a fire alarming device near the air outlet of the unit (during operation, the fire alarm
device might be erroneously triggered by the warm air from the unit);
INSTALLATION & REPAIR GUIDE
Split Wall-Mounted Air Conditioner
* Height limits of indoor and outdoor units.
* Either the indoor unit or the outdoor unit can be higher, but the height difference must comply the stated
requirements.
* Try to reduce the bending of the piping line as much as possible so as to avoid possible negative impacts upon the
performances of the units.
Indoor unit
outdoor
unit
5m(16'5")max.
Attention:If there are some additional function devices to install on the air conditioner,Be
sure add to the installation space for the function devices.
Above 100mm(4")
Left side: 150mm(6")
and above from wall Right side: 150mm (6")
and above from wall
Ceiling
Wall hanging plate
ground
2300mm(7'6")
and above
* Make sure of enough space for installation and maintenance.
* To take into consideration the operational convenience and safety in installation, it is recommended
to ensure enough space between the unit and the walls.

2
* Selection of installation positions for outdoor unit *
* To install the outdoor unit at the places which can stand the load of the machine weight and will
not cause big vibrations and noises;
* To install the unit at the places not to be exposed to rain or direct sunshine, and the places with
good ventilation;
* The noises generated from the unit will not affect the neighboring places;
* Do not install the unit on non-metal frame;
* Not to install the unit at the places where there might occur the generation, inflow, stay or
leakage of inflammable gases;
* Pay attention to the drainage of the condensed water from the base plate during operations;
* To avoid the air outlet being directly against the wind.
Detailed space requirements around the outdoor unit
1. When there are obstacles above
the unit 2. When the front (air outlet) is open 3. When there are obstacles only in
the front (air outlet)
4. When there are obstacles at the front and rear sides.
5. When there are obstacles all around
the unit on four sides.
Although the top side is open, the
installation is not to be done if there
are obstacles all around.
Space for maintenance
Shown as in the following figure. Keep
the maintenance space in front of the
unit.
500mm(1'8") min
100mm(4") min
500mm(1'8") min
200mm(8") min
500mm(1'8") min
500mm
(1'8")min
200mm
(8")min
Space for maintenance
* At least two sides should
be kept open.
200mm(8") min
300mm(1') min
1000mm(3'4") min
100mm(4") min
INSTALLATION & REPAIR GUIDE
Split Wall-Mounted air conditioner

3
* Installation fixture of indoor unit *
INSTALLATION & REPAIR GUIDE
Split Wall-Mounted air conditioner
Pipelines can be connected in the directions of****
****and* as indicated in Fig.1. When the pipelines
are connected to the directions of***and*, a groove
for the pipes has to be opened at the proper place on
the base stand. *Rear outlet
*Left rear outlet
*Left outlet
*Right outlet
*Bottom outlet
Fig.1
1.Installation of wall-mounting plate
Fix the wall-mounting plate firmly on the wall with screws.
Make sure of the leveling of the plate. Slanted wall-mounting
plate might jeopardize the smooth discharge of the condensed
water.
2.Drill holes on the wall
3.Installation of drain pipe
Install the pipelines of the indoor unit in accordance with
the direction of the wall holes. Wrap tightly the drain pipe
and the pipelines with tape. Make sure that the drain pipe
is underneath the pipelines. (Fig.3) (When the drain pipe
passes the room interior, some condensed water might
occur to its surfaces if the humidity is very high).
4.Installation of indoor unit
Pass the connection wires, connecting pipelines and drain
pipe through the wall hole. Hang the indoor unit on the
hooks at the top of the wall-mounting plate so that the
hooks at the bottom of the indoor unit match the hooks of
the wall-mounting plate. (Fig.4)
Fig.2 Fix with a tape
Wall cap Wall pipe
Interior Exterior
5-10mm lower
(1/5-2/5")
Wall
Fig.3
Pipelines of indoor unit
Drain pipe
Rear pipe
Bottom hooks
Hook supports
Top hooks
Fig.4
Drill holes at places slightly below the wall-mounting plate,
with hole diameter of 65mm(2-3/5") and the outer edge of
the hole 5-10mm(1/5-2/5") lower (Fig.2) so that the condensed
water can smoothly flow out. Cut the wall penetrating pipe
to proper length according to the thickness of the wall (3-
5mm(1/10-1/5") longer than the wall thickness) and insert
the pipe as indicated in Fig.2.

4
* Installation fixture of outdoor unit *
INSTALLATION & REPAIR GUIDE
Split Wall-Mounted air conditioner
Inspections:
a. Check if the hooks at the top and bottom
are firmly fixed.
b. Check if the position of the master unit is
properly leveled.
c. The drain pipe should not curve upward
(Fig.5).
d. The drain pipe should be at the lower part
of the wall pipes (Fig. 5).
Drain pipe
Connecting wires Connecting pipe
Wall pipe
Drain pipe
Fig.5
* Try to ship the product to the installation location in its original package;
* As the gravity center of the unit is not at the installation center, special caution should be taken
when using hoisting cables to lift it up;
* During shipping, the outdoor unit must not be slanted to over 45 degrees (Do not store the unit
in a horizontal way).
* Use expansion bolts to fix the mounting supports on the wall;
* Use bolts and nuts to fix the outdoor unit firmly on the supports and keep on the same level;
* If the unit is installed on the wall or at the rooftop, the supports have to be firmly fixed so as to
resist earthquake or strong wind.
Dimensions for parallel units installations
300mm(1')min
* Ordinary pipelines connection & Air purging *
* Ordinary pipelines connection
No dust ,foreign articles,air or moisture should be allowed to enter the air conditioning system.Careful
attention should be paid when pipeline connection for outdoor unit is made.Try to avoid repeated
curves as much as possible,otherwise hardening or cracks might be caused to the copper pipes.
Suitable wrenches should be used when the pipeline connection is done so as to ensure appropriate
torque(refer to following torque Table 1).Excessive torque might damage the joints while too little
torque might lead to leakage.
* The following ordinary pipelines connection and air purging procedures are just
suitable for non-quick coupler model.

INSTALLATION & REPAIR GUIDE
Split Wall-Mounted air conditioner
Table 1 Torque based upon the wrench to be used
* Air purging with vacuum pump
1.Check that pipelines connection have been properly
connected,remove the charging port cap,and connect
the manifold gauge and the vacuum pump to the
charging valve by service hoses as shown Fig.6.
2.Open the valve of the low pressure side of manifold
gauge,then,run the vacuum pump.Vacuum the indoor
unit and the connecting pipes until the pressure in
them lowers to below 1.5mmHG(The operation time
for vacuuming is about 10 minutes).When the desired
vacuum is reached,close the valve of the low pressure
of the manifold and stop the vacuum pump.
3.Disconnect the service hoses and fit the cap to
the charging valve.
4.Remove the blank caps,and fully open the spindles
of the 2-way and 3-ways valves with a service valve
wrench.
5.Tighten the blank caps of the 2-way and 3-ways
valves,applying the above torque Table 1.
Lo Hi
Indoor unit
Outdoor unit
Pressure gauge
Manifold gauge
Vacuum pump
Union nut
Blank cap
Valve stem
Charging
port
Service hose
* Adding refrigerant
Refrigerant must be added if the piping measures more
than 7.5 mtrs (25'0”) in length.This operation can only
be performed by a professional technician,for the
additional amount,see the table 2 below.
2-way valve
3-way valve
Outer diameter of
copper pipe Tightening torque
6.35(1/4")
9.52(3/8")
12.7(1/2")
15.88(5/8")
19.05(3/4")
Strengthened tightening torque
160kgf.cm(63kgf.inch)
300kgf.cm(118kgf.inch)
500kgf.cm(197kgf.inch)
750kgf.cm(295kgf.inch)
1200kgf.cm(472kgf.inch)
200kgf.cm(79kgf.inch)
350kgf.cm(138kgf.inch)
550kgf.cm(216kgf.inch)
800kgf.cm(315kgf.inch)
1400kgf.cm(551kgf.inch)
5
Additional refrigerant amount
Liquid pipe diameter 6.35(1/4")
(piping length-5)mx30g
or (piping length-16)ftx0.3oz
Liquid pipe diameter:9.52(3/8")
(piping length-5)mx65g
or (piping length-16)ftx0.7oz
Table 2
Fig.6

6
INSTALLATION & REPAIR GUIDE
Split Wall-Mounted air conditioner
After the pipieline connection is done,use a leakage inspection device or soap suds to carefully check
if there is any leakage at the joints.This is an imporant step to ensure the quality of installation.Once
a leakage is detected,proper treatment should be taken immediately.
* Gas leakage inspection
* Pipelines connection for Split type quick coupler model *
1.Connecting pipe bending minimum radius parameters
(Table 3)
2.Quick coupler assembly and disassembly limit:
the assembly and disassembly times are inadvisably
more than 7.
* Notes on installation of quick coupler:
Table 3 Minimum bending radius
Normial
diameter(mm) Minimum bending
radius(mm) cooling capacity
DN8(5/16")
DN10-12
(1/2")
80(3")
100(4")
2100~2300W
(7000~8000BTU)
2500~5100W
(9000~18000BTU)
6100~7000W
(22000~24000BTU)
150(6")
DN14-16
(5/8")
* If you purchase the machine for split type quick coupler model,please adopt the following
pipeplines connection procedures:
1.Remove the dust caps from the indoor and outdoor units,
and the connecting pipe.
2.Align the joint counter of connecting pipe with the proper
indoor and outdoor joint conic surfaces,tighten the connecting
nut manually.Then,make it secure with a wrench as shown
Fig.7 ,applying to above torque Table 1.
3.Remove the two valve core caps from the outdoor unit.
4.Turn on the high and low pressure valve cores with an
socket wrench,then tighten the two valve core caps of the
outdoor unit (Fig.8).
5.Finally ,wrap the hot insulating cotton around the joints
of indoor and outdoor units.
Fig.7
Fig.8
High pressure valve
Valve core cap
Low pressure valve
Quick coupler
(wrapping with insulating cotton)

INSTALLATION & REPAIR GUIDE
Split Wall-Mounted air conditioner
STEP 1
* Remove two screws on the maintance plate with
a screwdriver and take off the plate,then remove the
dust caps on both indoor male coupler and outdoor
female coupler,See Fig.9.
STEP 2
* Press the projecting section of outdoor female
coupler backward with a little force by the thumb to
make inner hooks open, and then you can easily take
out the outdoor valve for gas leaking by the other
hand,See Fig.10.
STEP 3
* In the same way,press the projecting section
backward,then connect the indoor male coupler to
the outdoor female coupler,See Fig.11.
STEP 4
* Close the key lever of indoor male coupler to the
horizontal position,then indoor and outdoor refrigerant
will be circulating,and now you can obvioulsy hear the
sound of inner air flowing ,See Fig.12.
STEP 5
* Connect the outdoor quick cable coupler with
indoor quick cable coupler,See Fig.13.
STEP 6
* Finally,Re-install the mainteance plate back into its
place,See Fig.14.
As for the outdoor valve for gas leaking and the dust
caps,you can preserve them for future possible use on
the removal of your air conditioner.
* If you purchase the machine for Whole-Unit type quick coupler model,please adopt the
following pipeplines connection procedures:
* Pipelines connection for Whole-Unit type quick coupler model *
Key lever
Indoor male coupler
Outdoor female coupler
Projecting section
Outdoor Valve for gas leaking
Outdoor female coupler
(With movable sheath)
Screw Dust Cap
Outdoor Valve for gas
leaking(rear end)
7
Fig.9
Fig.10
Fig.11
Fig.12

8
INSTALLATION & REPAIR GUIDE
Split Wall-Mounted air conditioner
Indoor quick cable coupler
Outdoor quick cable coupler
Wrap with ethylene tapes
* Connection of power cable *
1.Remove the drawer of the outdoor unit.
2.Non-quick coupler:connect the indoor power and control
wires with the matched outdoor wires in accordance
with the electric schematic diagram and make sure
that the connection is firmly done(Fig.15.)
Quick coupler:directly connect quick cable couplers with
indoor and outdoor quick cable couplers after disassembly
of the outdoor unit connecting box cover(Fig.16.)
3.Use a press plate to fix the wires firmly,and re-install
the drawer.
Note:Do not connect the wires in a wrong way,otherwise electric malfunctions will be caused and
even damages to the units will occur.The appliance shall be installed in accordance with national
wiring regulation.If the supply cord is damaged,it must be replaced by the manufacturer or its service
agent or a similarly qualified person in order to avoid a hazard.The plug shall be accessible after
installing the appliance.If the model have not plug that a switch which have a contact separation of
at least 3 mm in all poles shalled be added in fixed wiring.
* wrap the piplines tightly with ethylene tapes.
* Fix the wrapped pipelines on the exterior wall with clamps.
* Fill in the gaps left over by the pipeline hole and wall hole to prevent rain-water from entering.
* Finishing touches *
* Connect to the power source,check if the function selection keys on the remote controller are
working properly.
* Check if the room temperature adjustments and timer settings are working properly.
* Check if the drain is smooth.
* Check if there is any abnormal noise or vibration during operation.
* Check if there is leakage of refrigerant.
* Test running *
wire pressing plate
Drawer screw
Fig.15
Fig.16
Fig.13 Fig.14
4.Optional steps:In some cooling and heating models,you
should connect the indoor wire connector with outdoor
probe wire connector for defrosting,see Fig.17.
Fig.17
Indoor wire connector Outdoor probe wire connector for defrosting

9
INSTALLATION & REPAIR GUIDE
Split Wall-Mounted air conditioner
* Is the unit installed correctly? *
* Isn't there anything which prevents ventilation or obstructs operation in front of the indoor unit ?
Do not install the unit following place .
* Inflammable gases may leak .
* Oil splashes a lot .
* In case where the unit is used in such places as poisonous or sultry gases are generated or seaside
district exposed to sea breezes corrosion may cause malfunction . Consult with your distributor .
* Air conditioner body and remote controller must be I m(39-3/4") or more away from a TV or a radio.
Drain the dehumidified water from the indoor unit to a place which drains well .
* When installing the unit , choose a place which can stand the weight of the unit well and does
not increase the operation noise or vibration . Especially where there is a possibility that vibration
be transmitted to the house , fix the unit by inserting attached vibration -proof pads between the
unit and fittings .
* According to the service conditions and operating environment , the inside of the air conditioner
will become dirty after several seasons (3 to 5years ) of service , resulting in decreased operating
performance .Inspection and maintenance are recommended in addition to usual cleaning (The
air conditioner can be used for a longer period and without anxiety .)
* As to inspection and maintenance , consult your dealer or any one of business offices of
dealing companies .(Service charge is required in this case .)
* We recommend to perform inspection and maintenance during an off seasons.
* Suitable Installation Position
* Pay attention to operation noise
* Choose the place where hot air and operation noise from the outlet of the outdoor unit do not
annoy the neighborhood .
* Things left near the outlet and inlet of the outdoor unit cause malfunction or increased
operation noise . Do not leave obstacles near the outlet and inlet .
* If irregular sound is heard during operation , consult with your distributor .
* Inspection and Maintenance

*Self Diagnosis Functions*
Our company provides the thoughtful services for customer,air conditioners had been
installed self diagnosis system to display the information for the units.
INSTALLATION & REPAIR GUIDE
Split Wall-Mounted air conditioner
10
Note:Above self check information is commonly applicable in our most air conditioners,but some
are special,you can refer to the User's Manual for information or contact the dealer or authorized
maintenance people for help.
Digital self-check code/
(Polychrome screen self-check code)
Defrost indication Flicker 1 time/1s
Anti cold wind Flicker 1 time/1s
Room temperature
sensor fault
Coil temperaturesensor
Indoor fan fault
outdoor feedback
External feedback
fault
Open the door fault
Outdoor tube temper-
ature sensor faults
(EEPROM)communication
failures
Self-check code of luminotron/
(Self-check code of running
lamp)
Flicker 1 times/8s
Flicker 2 times/8s
Flicker 3 times/8s
Flicker 6 times/8s
Flicker 7 times/8s
Flicker 3times/8s
Flicker 4 times/8s
Flicker 6 times/8s
Self-check
information
Indicates "dF"or Heating icon
flash
Fan motor picture not running
E2
E3
E8
E5
E0
E7
E1
E6
North American
environment outside
temperature erceeds the
scope
FFFlicker 1 times/1s

This sheet only guides the requirements of the installation for stainless quick connector
pipe.Other installation requirements please refer to the installation guide along with the
unit.
11
INSTALLATION & REPAIR GUIDE
Split Wall-Mounted air conditioner
* To expand the connecting pipe,please hold one side then expand it following the right direction.
* Please insure the angles have a radian at some extent while intalling the stainless soft pipe.
Angels need to be around, not bended.(to the quick connecting spot and drilled point of wall.
* Please fix the stainless soft pipe while installing because the connecting pipes are soft, so that
prevent them from getting bended or stretched.
* The minimum bending radius are as follows:
Minimum bending radius(mm)
Twenty-one,Twenty-five
Thirty-five
Model
One hundred and fifteen(mm)
One hundred(mm)
Stainless soft pipe
*Quick connector installation instruction *
*Eight
*Ten
*Thirteen fifty-one
Eighty(mm)

*Installation Guide*
INSTALLATION & REPAIR GUIDE
Split Wall-Mounted air conditioner
12
To keep the allowed
bending radius,please
make the packed soft
pipes vertical for
expanding.
Please do not expand
only one side of the
packed soft pipes.
Extremely bending could
damage the pipes.
Please make use of
semicircle pulley to keep
the allowed bending
radius.
Please use twisting
wheel to avoid improper
bending.
Undersize bending will
damage the soft pipe.
Please Keep the
minimum bending radius
while installing.
Short soft pipes will
have them bending
undersize,it's not
allowed.
Over length soft pipes
will lead to irregular
bending.
Please use rigid elbow
to keep the bending
radius while soft pipes
operating.