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Maxicool LMD-24HDI Seite 2

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AIR PURGING AND TEST OPERATION
4
5
Liquid side:φ6.35mm
R22: (Pipe length-5)x30g/m
R410A: (Pipe length-5)x20g/m
Liquid side:φ9.52mm:
R22: (Pipe length-5)x60g/m
R410A: (Pipe length-5)x40g/m
Connective pipe length
Less than 5m
More than 5m
Air purging method
Use vacuum pump
Additional amount of refrigerant to be charged
Open the valve stem until it hits against
the stopper. Do not try to open it further.
Securely tighten the valve stem cap with
a spanner or the like.
Valve stem cap tightening torque. See
Tightening torque table.
.
.
.
.
Flare nut
Stopper
Cap
Valve body
Valve stem
Use vacuum pump
For the R407C refrigerant model, make sure the refrigerant added into air conditioner is liquid
form in any cases.
When relocate the unit to another place, using vacuum pump to perform evacuation.
.
.
.
.
Air and moisture in the refrigerant system have undesirable effects. Therefore, the indoor unit
and tubing between the indoor and outdoor unit must be leak tested and evacuated to remove
any noncondensables and moisture from the system.
Check that each tube(both liquid and gas side tubes) between the indoor and outdoor units have
been properly connected and all wiring for the test run has been completed.
Pipe length and refrigerant amount:
Outdoor
unit
Indoor
unit
Refrigerant
Packed valve
Half union
Gas side
Liquid side
A
C
D
B
1. Completely tighten the flare nuts, A, B, C, D, connect
t
he manifold valve charge hose to a charge port of the
p
acked valve on the gas pipe side.
2
. Connect the charge hose connection to the vacuum
p
ump.
3
. Fully open the handle Lo of the manifold valve.
4
. Operate the vacuum pump to evacuate. After starting
e
vacuation, slightly loose the flare nut of the packed
v
alve on the gas pipe side and check that the air is
e
ntering. (Operation noise of the vacuum pump changes
a
nd a compound meter indicates 0 instead of minus)
5. After the evacuation is complete, fully close the handl
e
L
o of the manifold valve and stop the operation of the
v
acuum pump.
Make evacuation for 15 minutes and more and check
5
that the compound meter indicates -76cmHg(-1.0x10 Pa).
O
6
. Turn the stem of the packed valve B about 45 counter-
clockwise for 6~7 seconds after the gas coming out, then
tighten the flare nut again. Make sure the pressure display
in the pressure indicator is a little higher than the atmosphere
pressure.
7
. Remove the charge hose from the Low pressure charge hose.
8
. Fully open the packed valve stems B and A.
9
. Securely tighten the cap of the packed valve.
Manifold valve
Compound meter
-76cmHg
Handle Lo
Handle Hi
Charge hose
Charge hose
Vacuum pump
Pressure gauge
Packed valve
Perform test operation after completing gas leak check at the flare nut connections and electrical
safety check.
Check that all tubing and wiring have been properly connected.
Check that the gas and liquid side service valves are fully open.
1. Connect the power, press the ON/OFF button on the remote controller to turn the unit on.
2. Use the MODE button to select COOL, HEAT, AUTO and FAN to check if all the functions works
well.
O
3. When the ambient temperature is too low(lower than 17 C), the unit cannot be controlled by the
remote controller to run at cooling mode, manual operation can be taken. Manual operation is
used only when the remote controller is disable or maintenance necessary.
Hold the panel sides and lift the panel up to an angle until it remains fixed with a clicking sound.
Press the Manual control button to select the AUTO or COOL, the unit will operate under Forced
AUTO or COOL mode(see User Manual for details).
4. The test operation should last about 30 minutes.
1. Air purging
2. When using the Vacuum Pump
4. Test running
3. Safety and leakage check
A: Lo packed valve B: Hi packed valve
C and D are ends of indoor unit connection.
CAUTION
1. Soap water method:
Apply a soap water or a liquid neutral detergent on the indoor
unit connections and outdoor unit connections by a soft brush
to check for leakage of the connecting points of the piping. If
bubbles come out, it indicates that the pipes have leakage.
2. Leak detector
Use the leak detector to check for leakage.
CONNECT THE CABLE TO THE OUTDOOR UNIT
CAUTION
Indoor unit
check point
D
B
C
A
Outdoor unit
check point
Cover
Electrical box
cover
Front Panel
Manual control
button
AUTO/COOL
,
Connect the cable to the indoor unit
Before performing any electrical work, turn off the main power to the system.
1. The inside and outside connecting cable can be connected without removing the front grille.
2. The indoor power cord type is H05VV-F or H05V2V2-F, the outdoor power cord and
interconnected cord type is H07RN-F.
3. Lift the indoor unit panel up, remove the electrical box cover by loosening the screw.
4. Ensure the colour of wires of outdoor unit and the terminal Nos. are the same to the indoor s
respectively.
5. Wrap those cables not connected with terminals with insulation tapes, so that they will not touch
any electrical components. Secure the cable onto the control board with the cord clamp.
NOTE:
NOTE: If used as MONO unit, for the standby control needs, the cross section area of cable connected
to L(1), 1, 2(N) must be sufficient for the maximum system current. The maximum system current is
equal to the sum of indoor unit and outdoor unit rated current.
Terminal block of indoor unit
To outdoor unit
L(1)
2(N)
S
1
1. Remove the electrical control board cover from the outdoor unit by loosening the screw.
2. Connect the connective cables to the terminals as identified with their respective matched number
s
on the terminal block of indoor and outdoor units.
3. Secure the cable onto the control board with the cord clamp.
4. To prevent the ingress of water, form a loop of the connective cable as illustrated in the installation
diagram of indoor and outdoor units.
5. Insulate unused cords (conductors) with PVC-tape. Process them so they do not touch any electrica
l
or metal parts.
Cover
Screw
Terminal block of outdoor unit
To indoor unit
Power supply
1
2(N)
S
L N
L(1)
I
N
D
O
O
R
U
N
I
T
CONNECT THE CABLE TO THE INDOOR UNIT
4
Install the outdoor unit on a rigid base to prevent increasing noise level and vibration.
Determine the air outlet direction where the discharged air is not blocked.
In the case that the installation place is exposed to strong wind such as a seaside, make
sure the fan operating properly by putting the unit lengthwise along the wall or using a dust
or shield plates.
Specially in windy area, install the unit to prevent the admission of wind. If need suspending
installation, the installation bracket should accord with technique requirement in the
installation bracket diagram. The installation wall should be solid brick, concrete or the same
intensity construction, or actions to reinforce, damping supporting should be taken.
The connection between bracket and wall, bracket and the air conditioner should be firm,
stable and reliable.
Be sure there is no obstacle which block radiating air.
Strong
wind
Strong
wind
Barrier
Incorrect
Correct
Seal
Drain joint
Base pan hole
of outdoor unit
(A)
(B)
The drain joint is slightly different according to the
different outdoor unit.
For the drain joint with the seal(Fig.A), first fit the seal onto
the drain joint, then insert the drain joint into the base pan
。
hole of outdoor unit, rotate 90 to securely assemble them.
To install drain joint as shown in Fig.B, insert the drain
joint into the base pan hole of outdoor unit until it remains
fixed with a clicking sound. Connecting the drain joint with
an extension drain hose (Locally purchased), in case of the
water draining off the outdoor unit during the heating mode.
2
DRAIN JOINT INSTALLATION
OUTDOOR INSALLATION PRECAUTION
3
Oblique
O
90
Roughness
Burr
REFRIGERANT PIPE CONNECTION
1. Cut a pipe with a pipe cutter.
2
. Remove flare nuts attached to indoor and
o
utdoor unit, then put them on pipe/tube
h
aving completed burr removal and flare
t
he pipe.
3
. Firmly hold copper pipe in a die in the
d
imension shown in the table below.
.
.
Align pipes to be connected.
Sufficiently tighten the flare nut with fingers,
and then tighten it with a spanner and torque
wrench as shown.
Excessive torque can break nut depending
on installation conditions.
Outer diam.
(mm)
A(mm)
Max.
Min.
6.35 1.3
0.7
9.52
1.6 1.0
12.7
1.8 1.0
12.7
16
1.8
2.2
1.0
2.0
Bar
Copper pipe
Clamp handle
Handle
Bar
"A"
Indoor unit tubing Flare nut Pipings
.
Outer
diam.
Tightening
torque(N.cm)
Additional tightening
torque(N.cm)
φ6.35mm
φ12.7mm
φ16mm
φ9.52mm
1500
(153kgf.cm)
1600
(163kgf.cm)
3500
(357kgf.cm)
4500
(459kgf.cm)
3600
(367kgf.cm)
4700
(479kgf.cm)
2500
(255kgf.cm)
2600
(265kgf.cm)
Flaring
Tightening connection
O
U
T
D
O
O
R
U
N
I
T
1
NOTE:
Electric safety regulations for the initial Installation
1. If there is serious safety problem about the power supply, the technicians should refuse to install
the air conditioner and explain to the client until the problem is solved.
2. Power voltage should be in the range of 90%~110%of rated voltage.
3. The surge protector and main power switch with a 1.5 times capacity of Max. Current of the unit should
be installed in power circuit. Ensure the air conditioner is grounded well.
4. The appliance shall be installed in accordance with national wiring regulations. Do not operate your air
conditioner in a wet room such as a bathroom or laundry room.
5. An all-pole disconnection device which has at least 3mm clearances in all poles, and have a leakage
current that may exceed 10mA, the residual current device(RCD) having a rated residual operating
current not exceeding 30mA, and disconnection must be incorporated in the fixed wiring in accordance
with the wiring rules.
6. For the unit adopts auxiliary electric heater, keep at least 1 meter away from the nearest combustible
materials.
7. According to the attached Electrical Connection Diagram located on the panel of the indoor & outdoor
unit to connect the wire. All wiring must comply with local and national electrical codes and be installed
by qualified and skilled electricians.
8. An individual branch circuit and single receptacle used only for this air conditioner must be available.
See the following table for suggested wire sizes and fuse specifications:
Minimum cross-sectional area of conductors:
Rated current
of appliance
(A)
>3 and ≤6
>6 and ≤10
>10 and ≤16
>16 and ≤25
>25 and ≤32
>32 and ≤40
Nominal cross-sectional
area
(mm2)
0.75
1
1.5
2.5
4
6
Electrical work
The wire size of power supply cord and
interconnected wire and the current of
the fuse or switch are determined by the
maximum current indicated on the
nameplate which located on the side panel
of the unit. Please refer to the nameplate
before selecting the wire size, fuse or switch.
The controller of the air conditioner designed
with a fuse protection function under
abnormal conditions, the specifications of
the fuse have printed on the circuit board,
such as: 3.15A/250VAC, T5A/250VAC, etc.
NOTE:
NOTE:
Connective pipe length will affect the capacity and energy efficiency of the unit. The
nominal efficiency is tested basing on the pipe length of 5 meters.
2

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