1
Hitachi
Split Unit Inverter Air Conditioner
Outdoor Unit
Installation Manual
This unit contains refrigerant inside. The quantity of refrigerant is adequate for pipes up to 30m long. If longer pipes are
needed, add refrigerant onsite as necessary. As the quantity of refrigerant varies due to pipe length and model differences,
please refer to the piping instructions for details.
Applicable models
RAC-112SQB RAC-125SQB RAC-140SQB RAC-160SQB
■ Make sure to hand over this manual to workers of the next stage and finally to the customer.
(Transportation and Handling) Æ (Ref. Piping Work) Æ (Electrical Wiring) Æ (Test Run) Æ (Customer)
Introduction
● This product is a general air-conditioner. Do not use for special purposes, such as food, animal and plant, precision
machinery, and artwork storage.
● When installing at locations where medical instruments may generate electromagnetic wave, avoid causing malfunction of
the air-conditioner.
○ To prevent electromagnetic interference (EMI), do not point the electromagnetic wave emitting surface of medical
instruments toward the electrical control panel, remote controller, and remote controller cable of the air-conditioner.
○ To avoid EMI in the air, keep machinery generating electromagnetic wave, such as radios, at least 3 meters away from
the air-conditioner.
● Do not place plants or animals directly under the airflow, as it is bad for them.
● As light will affect signal receiving of the remote control, keep the signal receiver at least one meter away from lights to
ensure signal receiving of the wireless remote control.
Temperature Ranges of Use
Condition
Function Indoor Unit Air Temperature
Outdoor Unit Air Temperature
Air-conditioning -5ºC DB to 43ºC DB 21ºC DB /15ºC WB to 32ºC DB /23ºC WB
DB: Dry-bulb temperature/WB: Wet-bulb temperature
―Contents―
1. Safety Precautions ................................................................................................................................................................... 2
2. Handling ............................................................................................................................................................................... 3-4
2-1 Accessories of the outdoor unit ..................................................................................................................................... 5
2-2 Verification of the combined capacity of indoor and outdoor units .............................................................................. 5
2-3 Outdoor unit installation ............................................................................................................................................. 5-7
3. Piping ...................................................................................................................................................................................... 8
3-1 Refrigerant pipe installation ..................................................................................................................................... 8-11
3-2 Evacuation and refrigerant filling ................................................................................................................................ 11
3-3 Pipe length DIP switch settings ................................................................................................................................... 12
3-4 Refrigerant filling level................................................................................................................................................ 12
3-5 Refrigerant recovering method .................................................................................................................................... 12
4. Wiring .............................................................................................................................................................................. 13-15
5. Test Run and Handover ......................................................................................................................................................... 16
5-1 Test Run .................................................................................................................................................................. 16-17
5-2 Menu setup .................................................................................................................................................................. 18
6. Error Code ............................................................................................................................................................................. 19
Before installation,
please read this
manual carefully
and keep it properly.
66MP1382
● Do not install at the following locations to prevent corrosion:
○ Coastal areas and locations with higher salinity.
○ Locations with high acidity or alkalinity.
○ Locations containing airborne grease (including grease from engine oil) and flammable gases.
○ Locations containing sulfur gas, such as hot springs.
● Do not install at the following locations:
○ Locations where there is flammable gas and airborne grease. There is a risk of fire and machine deformation, corrosion,
and damage.
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