The foundation must be level even
Outdoor unit foundation work
Avoid short circuits and ensure
sufficient space is allowed for
service
Installation of outdoor unit
Refer to automatic addressing flowchart
Automatic addressing of indoor unit
In the final check for 24hours at 3.8MPa(551psi) there must be
no drop in pressure.
Leak test
Multiple core cable must not be used.
(suitable cable should be selected)
Electrical work
(connection circuits and drive circuits)
Make sure no gaps are left where
the insulating materials are joined
Heat insulation work
Make sure airflow is sufficient
Duct work
Adjust to downward gradient
Drain pipe work
Special attention to
dryness, cleanness and
tightness
Refrigerant piping work
Check model name to
make sure the fitting is
made correctly
Installation of indoor unit
Take account of gradient
of drain piping
Sleeve and insert work
Make relationship between outdoor, indoor, remote controller,
and option connections clear. (Prepare control circuit diagram)
Preparation of contract drawings
Indicate clearly who is to be responsible for switch settings
Determination of division work
The vacuum pump used must have a capacity of reaching at
least 5 torr, more than 1 hour
Vacuum drying
Recharge correctly as calculated in this manual. and record the
amount of added refrigerant
Additional charge of refrigerant
Make sure there are no gaps left between the facing materials
used on the ceiling
Fit facing panels
Run each indoor unit in turn to make sure the pipe work has
been fitted correctly
Test run adjustment
Explain the use of the system as clearly as possible to your
customer and make sure all relevant documentation is in order
Transfer to customer with explanation
Preheat the crank case with the electrical heater for more than
6 hours.
CAUTION
• The above list indicates the order in which the individual work opera-
tions are normally carried out but this order may be varied where
local conditions warrants such change.
• The wall thickness of the piping should comply with the relevant local
and national regulations for the designed pressure 3.8MPa(551psi).
• Since R410A is a mixed refrigerant, the required additional refrigerant
must be charged in its liquid state.(If the refrigerant is charged in its
gaseous state, its composition changes and the system will not work
properly.)
!
CAUTION
Ratio of the connectable Indoor Units to the Outdoor: Within 50 ~
130%
Ratio of the running Indoor Units to the Outdoor: Within 10 ~
100%
A combination operation over 100% cause to reduce the total ca-
pacity.
!
Power Supply: Outdoor Unit
1 Phase 208/230 V 60 Hz
Connectable Indoor Unit
Multi V Space should be connected with "2 series" indoor unit only.
Ex) ARNU073ER2
SELECT THE BEST LOCATION
Select space for installing outdoor unit, which will meet the following
conditions:
• No direct thermal radiation from other heat sources
• No possibility of annoying the neighbors by noise from unit
• No exposition to strong wind
• With strength which bears weight of unit
• Note that drain flows out of unit when heating
• With space for air passage and service work shown next
• Because of the possibility of fire, do not install unit to the space
where generation, inflow, stagnation, and leak of combustible gas is
expected.
• Avoid unit installation in a place where acidic solution and spray (sul-
fur) are often used.
• Do not use unit under any special environment where oil, steam and
sulfuric gas exist.
• It is recommended to fence round the outdoor unit in order to pre-
vent any person or animal from accessing the outdoor unit.
• If installation site is area of heavy snowfall, then the following direc-
tions should be observed.
- Make the foundation as high as possible.
- Fit a snow protection hood.
• Select installation location considering following conditions to avoid
bad condition when additionally performing defrost operation.
1. Install the outdoor unit at a place well ventilated and having a lot of
sunshine in case of installing the product at a place with a high hu-
midity in winter (neare beach, coast, lake, etc).
(Ex) Rooftop where sunshine always shines.
2. Performance of heating will be reduced and preheat time of the in-
door unit may be lengthened in case of installing the outdoor unit
in winter at following location:
(1) Shade position with a narrow space
(2) Location with much moisture in neighboring floor.
(3) Location with much humidity around.
(4) Location where water gathers since the floor is not even.
Model ARUN053GF2
HP(Equivalent horsepower) 6
Chassis UV
Refrigerant
Product
charge
kg 3.5
lbs 7.7
Max. Connectable No. of Indoor Units 9
Net Weight
kg 145
lbs 320
Dimensions (WxHxD)
mm 750 × 1,790 × 681
inch 29.5 × 70.5 × 26.8
Connecting
Pipes
Liquid Pipes [mm(inch)] 9.52(3/8)
Gas Pipes [mm(inch)] 19.05(3/4)
OUTDOOR UNITS INFORMATION
INSTALLATION PROCESS
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