background image

3P207257-3  

M07B061

Test Run and Final Check (2)

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.

ATTENTION

Test Run and Final Check

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.)

After the unit is stopped, it will not start again (heating or cooling) for approximately 3 minutes.

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.

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. 

Items to Check

During cooling operation, frost may form on the gas stop valve or other parts. This is normal.

Operate the indoor units in accordance with the included operation manual. Check that they operate normally.

Temperature difference 
between inlet and outlet

Approx. 14

°

F

Cooling

Approx. 36

°

F

Heating

Are the indoor units installed securely?

Has an inspection been made to check for gas leakage?

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

Is the drainage secure?

Are the ground wire connections secure?

Are the electric wires connected correctly?

Is the wiring in accordance with the specifications?

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

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

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

Check item

Check

Consequences of trouble

Falling, vibration, noise

No cooling, no heating

Water leakage

Water leakage

Danger in the event of a ground fault

No cooling, no heating

Operation failure, burning

No cooling, no heating

No cooling, no heating

The priority room setting will not function.

(When running in one room)

Summary of Contents for 3P207257-3

Page 1: ... severe injury or death Do not ground units to water pipes telephone wires or lightning rods because incomplete grounding could cause a severe shock hazard resulting in severe injury or death and to gas pipes because a gas leak could result in an explosion which could lead to severe injury or death Do not ground units to telephone wires or lightning rods because lightning strikes could cause a sev...

Page 2: ...he power supply Use a only a separate dedicated power circuit Failure to do so may cause abnormal heat electric shock fire or equipment damage Use the specified types of wires for electrical connections between the indoor and outdoor units Follow all state and local electrical codes Firmly clamp the interconnecting wires so their terminals receive no external stresses Incomplete connections or cla...

Page 3: ...s at least 9 8 feet away from television and radio sets This is to prevent interference to images and sounds Noises may be heard even if they are more than 9 8 feet away depending on radio wave conditions 8 In coastal areas or other places with salty atmosphere of sulfate gas corrosion may shorten the life of the air conditioner 9 Since drain flows out of the outdoor unit do not place under the un...

Page 4: ... insulation pipe s cut line Wrap the insulation pipe with the finishing tape from bottom to top Right side plate Allow 11 13 16 inch of work space below the ceiling surface 9 13 16 inch from wall Allow space for piping and electrical servicing 13 3 4 in Clamping material Insulation tube Service lid Tape Also insulate the connection on the outdoor unit Use tape or insulating material on all connect...

Page 5: ...s of the foundation bolts Prepare four sets of M12 foundation bolts nuts and washers each which are available on the market It is best to screw in the foundation bolts until their length are 3 4 from the foundation surface Connections connection port Install the indoor unit according to the table below which shows the relationship between the class of indoor unit and the corresponding port The tot...

Page 6: ...lass Piping to each indoor unit Total length of piping between all units 4MXS32 82ft max 230ft max Where a wall or other obstacle is in the path of outdoor unit s intake or exhaust airflow follow the installation guidelines below For any of the below installation patterns the wall height on the exhaust side should be 4ft or less Wall facing one side Walls facing two sides Walls facing three sides ...

Page 7: ... III After insertion turn them about 40 clockwise 3 Connect vinyl hose on the market internal diameter of 1 inch to drain socket A If the hose is too long and hangs down fix it carefully to prevent the kinks 3 Refrigerant Piping C Drain receiver A Drain socket B Drain cap I II III Flare nut for φ1 4 Flare nut for φ3 8 Flare nut for φ1 2 Flare nut for φ5 8 10 5 12 7 ft lbf 24 1 29 4 ft lbf 36 5 44 ...

Page 8: ...as is for 4 5 minutes and make sure the coupling meter needle does not go back If it does go back this may indicate the presence of moisture or leaking from connecting parts After inspecting all the connection and loosening then retightening the nuts repeat steps 2 4 6 Turn the liquid stop valve s rod 90 degrees counterclockwise with a hexagonal wrench to open valve Close it after 5 seconds and ch...

Page 9: ...gerant gas pipe s surface temperature reaches 230 F max Choose heat insulation materials that will withstand this temperature 2 Be sure to insulate both the gas and liquid piping and to provide insulation dimensions as below 3 Use separate thermal insulation pipes for gas and liquid refrigerant pipes Even though the stop valve is fully closed the refrigerant may slowly leak out do not leave the fl...

Page 10: ...r φ3 8 24 1 29 4 ft lbf Flare nut for φ1 2 36 5 44 5 ft lbf Flare nut for φ5 8 45 6 55 6 ft lbf No 1 φ5 8 φ1 2 No 2 φ1 2 φ3 8 No 3 φ5 8 φ1 2 No 4 φ1 2 φ3 8 No 5 φ5 8 φ3 8 No 6 φ5 8 φ3 8 Gasket 1 Gasket 2 Reduce and gasket No 1 No 3 Flare nut for φ5 8 Inter unit piping Connection port of outdoor unit Be sure to attach the gasket No 5 No 6 Flare nut for φ3 8 Be sure to attach the gasket No 4 No 2 Fl...

Page 11: ... capable handling harmonics in order to prevent malfunctioning of the ground leak detector itself 4 Use an all pole disconnection type breaker with at least 1 8 between the contact point gaps 5 When carrying out wiring connection take care not to pull at the conduit WARNING 1 When the protection plate is removed do not turn ON the safety breaker 2 When the service port is operated the protection p...

Page 12: ...ith the terminal board 3 Be sure to match the symbols for wiring and piping 4 Pull the wire and make sure that it does not disconnect Then fix the wire in place with the binding band Safety breaker Ground leakage CB Outdoor unit 60Hz 208 230V Be sure to use the dedicated circuits To room B To room C To room D Use AWG 16 or AWG 14 wire for the power supply and interconnecting wires Room A Room A Ro...

Page 13: ...ating all other indoor units do not operate and enter standby mode according to the operation mode of the set indoor unit 2 Priority during powerful operation If the indoor unit which is set for Priority Room Setting is operating at powerful the capabilities of other indoor units will be somewhat reduced Power supply gives priority to the indoor unit which is set for Priority Room Setting 3 Quiet ...

Page 14: ... will be saved Setting procedure Remove the SW5 jumper switch Once the settings are complete reset the power Install the removed jumper switch as described below This switch will be needed to later disable this setting NOTE 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 circuit pins 3 an...

Page 15: ...the outdoor unit service PC board However the wiring error check switch will not function for 3 minutes after the safety breaker is turned on or depending on the outside air conditions See Note 2 Approximately 15 20 minutes after the switch is pressed the errors in the connection wiring will be corrected The service monitor LEDs indicate whether or not correction is possible as shown in the table ...

Page 16: ...inutes 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 Items to Check During cooling operation frost may form on the gas stop valve or other parts This is normal Operate the indoor units in accordance with the included operation manual Check that they operate normally Temperature difference between ...

Reviews: