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10.2 Leak Test

Installation and Maintenance

19

Only after all the checking points have been checked 

the unit can be operated.
(A) Check and make sure that the resistance of the 
terminal to ground is more than 2M , otherwise, you 
cannot operate the unit before the electricity leakage 
point is found and repaired.
(B) Check and make sure that the stop valve has been 
opened before operating the unit.

·

Ω

The trial should be carried out according to the 

installation and maintenance manual.

Leak test all joints and valves of the indoor unit and 
outdoor unit with liquid soap. Checking of the orifice 
cap shouldn't be less than 30 seconds. Clean the 
liquid  soap  after the test in case that the color of 
the copper tube may change for erode.

10.3 Tidy Up the piping

If the leak test turns out to be all right, preserve heat 
the joints of the indoor unit.
Straighten the connecting tubes and make them 
flush and fixed to the wall. Seal the space around the 
hole in the wall through which the pipes come out 
with gypsum.

10.4 Test Run

Make sure the power and unit run well then plug in.
Turn on the appliance and adjust it to Cooling, 
dehumidifying and Heating mode according to the 
room temperature. Check if the appliance can run 
well.

Installation of the appliance is generally finished after 
the above operations are done. If you still have any 
trouble, please contact local technical service center 
of our company for further information.

Narrow pipe

Hex wrench

Wide pipe

Service valve

Bonnet of service valve

Bonnet of narrow valve

Bonnet of wide valve

Indoor unit

Outdoor unit

Manifold 

valve

Pressure

gauge

Vacuum pump

 Fig.10.1

 Fig.10.2

10.Air purging and test run

Air and moisture remaining in the refrigerant system 
have undesirable effects. 
Therefore, they must be purged completely following 
the steps.

10.1 Air Purging with a Vacuum Pump

  (See 

Figure 10.1, Figure 10.2)
(1) Check that each pipe (both narrow and wide pipes 
between the indoor and outdoor units) have been 
properly connected and all wiring for the test run has 
been completed. Note that both narrow and wide pipes  
valves on the outdoor unit are kept closed at this stage.
(2) Using an adjustable wrench or box wrench, remove 
the bonnet from the service valve.
(3) Connect a vacuum pump and service valve together 
tightly.
(4) Turn on the vacuum pump and  till the pressure is 
lower than 15Pa(or 1.5

×

10

-4

bar) for 5 minutes.

(5) With the vacuum pump still running,  disconnect  
pipe of vacuum pump from the service valve. Then stop 
the vacuum pump. 
(6) Replace the bonnet on the service valve and fasten 
it securely with an adjustable  wrench or box wrench. 
(7) Using an adjustable wrench or box wrench, remove 
the bonnet of both narrow and wide  valve.
(8) With the hex wrench, turn the wide and narrow pipes  
valves  stem counter clockwise to fully open the valves.
(9) Replace the bonnets on the wide and narrow valves 
and fasten it securely with an adjustable wrench or box 
wrench. 

WARNING

Содержание YFKN18BZNREUH1

Страница 1: ...er R 410A 50Hz Heat Pump R 410A 50Hz Cooling Only Model YFKN42BZMREUH1 YFKN48BZMREUH1 YFKN55BZMREUH1 YFKN18BZNREUH1 YFKN24BZNREUH1 YFKN36BZNREUH1 Model YFJN18BZNRETH1 YFJN24BZNRETH1 YFJN36BZNRETH1 YFJ...

Страница 2: ...erant Piping 14 4 1 The Piping Material 14 4 2 Piping Connection 14 5 Drain Piping 15 6 Electrical wiring 16 7 Attaching the Air Return Grille 16 8 The Installation of the Outdoor Unit 17 8 1 Installa...

Страница 3: ...damage It refers to the remarks and instruction to the operation maintenance and service DANGER WARNING Alert Symbols CAUTION 1 Contents NOTE This air conditioner has been designed for the following t...

Страница 4: ...ing the air conditioner the main power switch the of air conditioner must be cut off immediately and the agent must be contacted If the supply cord is damaged it must be replaced by the factory or its...

Страница 5: ...Intake Inside of Horizontal Louver 3 Composition of the Air conditioner Indoor Unit Outdoor Unit Notes Figures in the manual are only simple representation of the appliance it may not comply with the...

Страница 6: ...cy switch It lights on during operation It lights off all when setting SLEEP mode Run indicator Red Wired remote controller Wireless remote controller Wire remote controller optional You can control t...

Страница 7: ...rned off by user The fan of the indoor unit will never stop running in cooling operation It remains running even if the compressor stops working Heating capacity depends on external factors as outdoor...

Страница 8: ...bs 4 then remove the holding screws 4 or 6 as indicated by the arrow marks Step2 Open the air return grille to an angle of more than 45 and take out the air filter from the air inlet grille by holding...

Страница 9: ...4 way valve Heat exchanger Liquid piping Heating cycle Cooling cycle INDOOR UNIT OUTDOOR UNIT Heat exchanger EEV Service valve Outdoor unit Indoor unit Terminal Terminal SI L N SI L N Power connecting...

Страница 10: ...es other than the specified refrigerant R410A such as air Any presence of air or other foreign substance in the refrigerant circuit causes an abnormal pressure rise or rupture resulting in injury If a...

Страница 11: ...8 9 10 11 12 13 14 Tool Knife or wire stripper Tube expander Inner hexagon spanner Tape measure Gradienter Hammer Churn drill 3 1 Before installation Unit type Power supply specification When moving t...

Страница 12: ...anging And Adjustment For Pipe Cover Fixing For Refrigerant Piping Connection For Drain Pipe Connection For Joint Socket Connection For Drain Hose Connection For Drain Hose Cover 1 1 1 1 2 2 1 10 8 1...

Страница 13: ...rain properly The ceiling is strong enough to bear the weight of the indoor unit Sufficient clearance for maintenance and servicing Piping between the indoor and outdoor units is within the allowable...

Страница 14: ...let Right outlet Rear outlet Drain outlet rear right Drain outlet rear left Drain outlet right Drain outlet left Fig 3 3 3 Fig 3 3 4 Fig 3 3 5 Slide stoppers 4 places of the catches then remove the sc...

Страница 15: ...nclosed paper pattern as a reference and drill the holes for the suspension bolts and pipe Note Decide the locations based on the direct measurements ii After the locations are properly placed the pap...

Страница 16: ...panners Fig 4 3 Screw up the nut torque 3 After finishing connecting the refrigerant pipes keep it warm with the insulation material 6 35mm 9 52mm 12 7mm 15 88mm 19 05mm Tube size 20 40 60 80 100 Torq...

Страница 17: ...ld be insulated because condensation may form there causing water to leak Drain piping passing indoors Drain sockets Referring the figure below insulate the drain socket and drain hose using the inclu...

Страница 18: ...n grille When clamping the wiring use the included clamping material as shown in the FIG 6 1 to prevent outside pressure being exerted on the wiring connections and clamp firmly When doing the wiring...

Страница 19: ...d onto the wall make sure that the wall and the supporting rack is strong enough to hold the weight of the appliance Release the setscrews of the electric cover remove the electric cover If the valve...

Страница 20: ...eat insulation effect Also be sure the condensed drain hose splits away from bundle and drips clear of the unit and the piping The two refrigerant tubes and electrical wire if local codes permit shoul...

Страница 21: ...cal technical service center of our company for further information Narrow pipe Hex wrench Wide pipe Service valve Bonnet of service valve Bonnet of narrow valve Bonnet of wide valve Indoor unit Outdo...

Страница 22: ...ng flexible cord make sure to use the round crimp style terminal for connection to the power supply terminal block Place the round crimp style terminals on the wires up to the covered part and secure...

Страница 23: ...nt possible harm to the environment or human health from uncontrolled waste disposal recycle it responsibly to promote the sustainable reuse of material resources To return your used device please use...

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