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2.

Trial operation and testing

1) To test cooling, set for the lowest temperature. To test heating, set for the highest temperature. (Depending on the room 

temperature, only heating or cooling (but not both) may be possible.)

2) After the unit is stopped, it will not start again (heating or cooling) for approximately 3 minutes.
3) During the test run, first check the operation of each unit individually. Then also check the simultaneous operation of 

all indoor units.
Check both heating and cooling operation.

4) After running the unit for approximately 20 minutes, measure the temperatures at the indoor unit inlet and outlet. If the 

measurements are above the values shown in the table below, then they are normal.

(When running in one room)

5) During cooling operation, frost may form on the gas stop valve or other parts. This is normal.
6) Operate the indoor units in accordance with the included operation manual. Check that they operate normally.

3.

Items to check

ATTENTION

• Have the customer actually operate the unit while looking at the manual included with the indoor unit. Instruct the customer 

how to operate the unit correctly (particularly cleaning of the air filters, operation procedures, and temperature adjustment).

• Even when the air conditioner is not operating, it consumes some electric power. If the customer is not going to use the unit 

soon after it is installed, turn off the breaker to avoid wasting electricity.

• If additional refrigerant has been charged because of long piping, list the amount added on the nameplate on the reverse side 

of the stop valve cover.

Cooling

Heating

Temperature difference 
between inlet and outlet

Approx. 8

°

C

Approx. 20

°

C

Check item

Consequences of trouble

Check

Are the indoor units installed securely?

Falling, vibration, noise

Has an inspection been made to check for gas leakage?

No cooling, no heating

Has complete thermal insulation been done (gas pipes, liquid 
pipes, indoor portions of the drain hose extension)?

Water leakage

Is the drainage secure?

Water leakage

Are the ground wire connections secure?

Danger in the event of a ground fault

Are the electric wires connected correctly?

No cooling, no heating

Is the wiring in accordance with the specifications?

Operation failure, burning

Are the inlets/outlets of the indoor and outdoor units free of any 
obstructions?

No cooling, no heating

Are the stop valves open?

No cooling, no heating

Do the marks match (room A, room B) on the wiring and piping 
for each indoor unit?

No cooling, no heating

Is the priority room setting set for 2 or more rooms?

The priority room setting will not func-
tion.

Summary of Contents for 3MXS68G3V1B2

Page 1: ...INSTALLATION MANUAL R410A Split Series Models 3MXS68G3V1B2 4MXS68F3V1B2 ...

Page 2: ...Certificato C 07 Σημείωση όπως καθορίζεται στο A και κρίνεται θετικά από το B σύμφωνα με το Πιστοποιητικό C 08 Nota tal como estabelecido em A e com o parecer positivo de B de acordo com o Certificado C 09 Примечание как указано в A и в соответствии с положительным решением B согласно Свидетельству C 10 Bemærk som anført i A og positivt vurderet af B i henhold til Certifikat C 11 Information enlig...

Page 3: ......

Page 4: ...ting terminals If refrigerant gas leaks during installation ventilate the area immediately Toxic gas may be produced if the refrigerant comes into contact with fire After completing installation check for refrigerant gas leakage Toxic gas may be produced if the refrigerant gas leaks into the room and comes into contact with a source of fire such as a fan heater stove or cooker When installing or r...

Page 5: ...other places with salty atmosphere of sulfate gas corrosion may shorten the life of the air condi tioner 9 Since drain flows out of the outdoor unit do not place under the unit anything which must be kept away from moisture NOTE Cannot be installed hanging from ceiling or stacked CAUTION When operating the air conditioner in a low outdoor ambient tem perature be sure to follow the instructions des...

Page 6: ... in the insulation pipe s cut line Wrap the insulation pipe with the finishing tape from bottom to top 250mm from wall Allow space for piping and electrical servicing If there is the danger of the unit falling or overturning fix the unit with foundation bolts or with wire or other means If the location does not have good drainage place the unit on a level mounting base or a plastic pedestal Instal...

Page 7: ...ons on Installation Check the strength and level of the installation ground so that the unit will not cause any operating vibration or noise after installed In accordance with the foundation drawing in fix the unit securely by means of the foundation bolts Prepare 4 sets of M8 or M10 foundation bolts nuts and washers each which are available on the market It is best to screw in the foundation bolt...

Page 8: ...piping is as short as possible Shortest allow able length per room is 3m Outdoor unit capacity class 4MXS68 3MXS68 Piping to each indoor unit 25m max 25m max Total length of piping between all units 60m max 50m max If the outdoor unit is positioned higher than the indoor units If the outdoor unit is positioned otherwise If lower than one or more indoor units Wall facing one side Side view More tha...

Page 9: ...ation oil for R410A Use torque wrenches when tightening the flare nuts to prevent damage to the flare nuts and gas leakage Align the centres of both flares and tighten the flare nuts 3 or 4 turns by hand Then tighten them fully with the torque wrenches Drain water hole Bottom frame Drain plug While pressing Hose available commercially inner dia 16mm Flare nut tightening torque Flare nut for φ6 4 1...

Page 10: ... Lo and completely close its high pressure valve Hi High pressure valve subsequently requires no operation 3 Apply vacuum pumping Check that the compound pressure gauge reads 0 1MPa 76cmHg Evacuation for at least 1 hour is recommended 4 Close gauge manifold s low pressure valve Lo and stop vacuum pump Leave as is for 4 5 minutes and make sure the coupling meter needle does not go back If it does g...

Page 11: ...o not leave the flare nut removed for a long period of time Outdoor capacity class 4MXS68 3MXS68 Total length of piping for all rooms 30m Filling a cylinder with an attached siphon Stand the cylinder upright when filling There is a siphon pipe inside so the cylinder need not be upside down to fill with liquid Filling other cylinders Turn the cylinder upside down when filling 3 5 6 2 1 4 Please fil...

Page 12: ...tem as this would reduce the lifetime of the units Never use piping which has been used for previous installations Only use parts which are delivered with the unit Never install a dryer to this R410A unit in order to guarantee its lifetime The drying material may dissolve and damage the system Incomplete flaring may cause refrigerant gas leakage Gas pipe O D 9 5mm 12 7mm Thickness 0 8mm C1220T O O...

Page 13: ...d connection port of the outdoor unit where the flare nut comes in Use an appropriate wrench to avoid damaging the connection thread by overtightening the flare nut Flare nut tightening torque Flare nut for φ9 5 32 7 39 9N m 333 407kgf cm Flare nut for φ12 7 49 5 60 3N m 505 615kgf cm Flare nut for φ15 9 61 8 75 4N m 630 769kgf cm No 1 φ15 9 φ12 7 No 2 φ12 7 φ9 5 No 3 φ15 9 φ12 7 No 4 φ12 7 φ9 5 N...

Page 14: ... the liquid stop valve with a hexagonal wrench 4 After two to three minutes close the gas stop valve and stop forced cooling operation 1 Forced operation 1 Turn the Operation Mode switch SW2 to COOL 2 Press the Forced Operation switch SW1 to begin forced cooling Press the Forced Operation switch SW1 again to stop forced cooling Gas stop valve Close Hexagonal wrench Liquid stop valve Valve caps Ser...

Page 15: ...ioner must be earthed For earthing follow the applicable local standard for electrical installations Safety breaker Earth leakage circuit breaker Outdoor unit 50Hz 220 240V Be sure to use the dedicated circuits To room B To room C To room D Room A Room A Room C Room D Room B Indoor unit Power supply wire 3 core 2 5mm or more H05RN Inter unit wire 4 core 1 5mm or more H05RN L N Shape the wires so t...

Page 16: ...operating all other indoor units do not operate and enter standby mode according to the operation mode of the set indoor unit 1 2 Priority during high power operation If the indoor unit which is set for priority room setting is operating at high power the capabilities of other indoor units will be somewhat reduced Power supply gives priority to the indoor unit which is set for priority room settin...

Page 17: ...saved Setting procedure Remove the SW5 jumper switch Once the settings are complete reset the power NOTE Install the removed jumper switch as described below This switch will be needed to later disable this setting COOL HEAT Mode Lock S15 Use the S15 connector to set the unit to only cool or heat Setting to only heat H short circuit pins 1 and 3 of the connector S15 Setting to only cool C short ci...

Page 18: ...ing in the usual manner NOTE 1 For three rooms LED 4 is not displayed 2 If the outside air temperature is 5 C or less the wiring error check function will not operate 3 After wiring error check operation is completed LED indication will continue until ordinary operation starts This is normal 4 Follow the product diagnosis procedures Check the nameplate on the underside of the stop valve Wiring err...

Page 19: ...ures and temperature adjustment Even when the air conditioner is not operating it consumes some electric power If the customer is not going to use the unit soon after it is installed turn off the breaker to avoid wasting electricity If additional refrigerant has been charged because of long piping list the amount added on the nameplate on the reverse side of the stop valve cover Cooling Heating Te...

Page 20: ...3P401524 3 2015 02 Copyright 2015 Daikin ...

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