Hitachi RAS-1.0PNNBDH1 Instruction Manual

–
RAS-1.0PNNBDH1
RAS-1.5PNNBDH1
RAS-2.0PNNBDH1
RAS-3.0PNNBDH1
RAS-4.0PNNBDH1
OUTDOORUNITS
DC-INVERTER SERIES
HO2021388HA

Contents
Safety Precautions..........................................................................................................................................1
Diagram of Refrigerant Cycle & Wiring .............. ..............................................................................................3
Refrigerant Flow Diagram ..............................................................................................................................3
Electrical Wiring Diagram...............................................................................................................................3
Installation Instructions..................................................................................................................................4
Transportation and Handling before Installation ............................................................................................4
Installation Locations Selection......................................................................................................................4
Drainage Elbow and Drain Hose Installation..................................................................................................5
Outdoor Unit Installation.................................................................................................................................5
Refrigerant Piping .........................................................................................................................................6
Wiring .............................................................................................................................................................9
Trial Run ......................................................................................................................................................11
NOTE:
● This air conditioner is designed for the following temperatures.
It should be operated within this range:
DC Inverter Unitary Series
Mode
Outdoor Operation Temperature Range
[℉ (℃)]
Model
Maximum
Minimum
Cooling Operation
1.0~4.0HP
(9K~36K)
118 (48)
5 (-15)
Heating Operation
3.0HP(24K)
75 (24)
-13 (-25)
1.0/1.5/2.0/4.0HP
(9K/12K/18K/36K)
75 (24)
-4 (-20)
● Storage Condition: Temperature -13~140℉ (-25~60℃)
Humidity 30%~80%
● The numbers in the model represent the cooling capacity (HP).
For example, 3.0HP represents .RAS-3.0PNNBDH1
● Letter K in the manual stands for kBtu/h, for example 9K,12K,18K,24K,36K, which means model size,
not real capacity.

1 This air conditioner uses R410A refrigerant..
2 Since the max. working pressure is 550 psig (3.8MPa) [R22:450 psig (R22:3.1MPa)], some of .
the piping and installation and service tools are special.
3.This air conditioner uses power supply: 208/230V ~/60Hz.
Please read these SAFETY PRECAUTIONS carefully to ensure correct installation.
·Be sure to use a dedicated power circuit, and do not put other loads on the power supply.
·Be sure to read these SAFETY PRECAUTIONS carefully before installation.
·Be sure to comply with SAFETY PRECAUTIONS of installation manual, because it contains
important safety issues. Definitions for identifying hazard levels are provided below with their
respective safety symbols.
WARNING: Hazards or unsafe practices which COULD result in severe personal injury or death.
CAUTION: Hazards or unsafe practices which COULD result in minor personal injury or product
or property damage.
·Please carefully file indoor and outdoor unit manual away for future reference.
·We recommend that this air conditioner be installed properly by qualified installation technicians in
accordance with the installation instructions provided with the unit.
Incomplete installation could cause damage by fire, electric shock, drop or water leakage.
·Wiring must be done by a qualified electrician.
·Install the air conditioner on a solid base that can support the unit weight.
An inadequate base or incomplete installation may cause injury in the event the unit falls off from
the base.
·Use the specified type of wire for safe electrical connections.
Firmly clamp the interconnecting wires so that their terminals receive no external stress.
Incomplete connection may cause fire.
·For wiring, use a cable long enough to cover the entire distance with no connection, and don’t
connect multiple devices to the same AC power supply.
Otherwise, it may result in bad contact, poor insulation, unallowable current, which could finally result
in fire or electric shock.
·After all installations are completed, check to make sure that no refrigerant leakage occurs.
It will generate harmful substances if the refrigerant gas leaks in the interior area and has contact
with heater or stove flame.
·Perform the installation securely by referring to the installation manual.
Incomplete installation could cause a personal injury arising from fire, electric shock, unit falling or
water leakage.
·In accordance with the installation instructions for electrical work, please be sure to use a dedicated
line.
·If the power supply circuit capacity or electrical work is not in place, it may cause a fire or electric
shock.
·Attach the electrical cover to the indoor unit and the service panel to the outdoor unit securely.
·If the electrical covers on the indoor unit or the service panel of the outdoor unit are not attached
securely, it could result in a fire or an electric shock due to dust water, etc.
·Please be sure to cut off the main power supply before the installation of indoor electronic PCB or
wiring. Otherwise, it will cause electric shock.
·The device should be in accordance with the state provisions for installation wiring.
·Pay attention to protecting the outdoor unit installation location. Avoid people or other small animals
damaging electrical components. Please keep the surrounding environment of the outdoor unit
clean and tidy.
·When installing or relocating the unit, make sure that no substance other than the specified
refrigerant (R410A) enters the refrigerant circuit.
Any presence of foreign substance such as air can cause abnormal pressure rise or an explosion.
WARNING
Safety Precautions
1
California Residents Only-
Cancer and Reproductive Harm
www. P65 Warnings.ca.gov

Safety precautions
·Perform grounding
Do not connect the earth wire to a gas pipe, water pipe, lightning rod or telephone earth wire.
Defective grounding could cause an electric shock.
·Do not install the unit in a place where inflammable gas leaks.
If gas leaks and accumulates in the area surrounding the unit, it could cause an explosion.
·Fasten a flare nut with a torque wrench as specified in this manual.
When fastened too tightly, a flare nut may break after a long period, thereby causing refrigerant leakage.
·Install an earth leakage breaker depending on the installation place(where it is humid).
If an earth leakage breaker is not installed, it could cause an electric shock.
·Perform the drainage/piping work securely according to the installation manual.
·If there is a defect in the drainage/piping work, water will drop from the unit and household items
will get wet and damaged.
CAUTION
2
·Do not let air enter the refrigeration system or discharge refrigerant when moving the air conditioner.
·The installation instructions for appliances that are intended to be permanently connected to fixed
wiring, and have a leakage current that may exceed 10 mA, shall state that the installation of a
residual current device (RCD) having a rated residual operating current not exceeding 30 mA is
advisable.
·This appliance is not intended for use by persons (including children) with reduced physical, sensory
or mental capabilities, or lack of experience and knowledge, unless they have been given supervision
or instruction concerning use of the appliance by a person responsible for their safety.
Children should be supervised to ensure that they do not play with the appliance.
·If the appliance is fixed wiring, the appliance must be fitted with means for disconnection from the
supply mains having a contact separation in all poles that provide full disconnection under over
voltage category III conditions, and these means must be incorporated in the fixed wiring in
accordance with the wiring rules.
·If the supply cord is damaged, it must be replaced by the manufacturer, its service agent or similarly
qualified persons in order to avoid a hazard.
·The appliance shall be installed in accordance with national wiring regulations.
·Servicing shall only be performed as recommended by the equipment manufacturer.
Safety Instructions
·The method of connection of the appliance to the electrical supply and interconnection of separate
components is detailed in below part. The wiring diagram with a clear indication of the connections
and wiring to external control devices and supply cord is detailed in below part. The cord of the
H07RN-F type or the electrically equivalent type must be used for power connection and
interconnection between outdoor unit and indoor unit. The size of the cord is detailed in below part.
·In order to avoid a hazard due to inadvertent resetting of the thermal cut-out, this appliance must not
be supplied through an external switching device, such as a timer, or connected to a circuit that is
regularly switched on and off by the utility.
·It is necessary to allow disconnection of the appliance from the supply after installation. The
disconnection may be achieved by incorporating a switch in the fixed wiring in accordance with the
wiring rules. During service and when replacing parts, be sure to disconnect the appliance from its
power source. If the disconnection is not foreseen, and provide a disconnection with a locking system
in the isolated position.
·Details of type and rating of fuses, or rating of circuit breakers / ELB is detailed in below parts.
·The information of dimensions of the space necessary for correct installation of the appliance
including the minimum permissible distances to adjacent structures is detailed in below parts.
·This appliance is intended to be used by expert or trained users in shops, in light industry and
on farms, or for commercial use by lay persons.
·Instructions on additional charging of refrigerants are detailed below.

Diagram of Refrigerant Cycle & Wiring
3
Gas piping
Wide service valve
Compressor
Accumulator
4-way valve
Heat exchanger
Liquid piping
Heating cycle
Cooling cycle
INDOOR UNIT OUTDOOR UNIT
Heat exchanger
EEV
Service valve
Electrical Wiring Diagram
Refrigerant Flow Diagram
Outdoor Unit Indoor Unit
Terminal Terminal
Power Supply
Power Connecting Cord
1.0/1.5/2.0/3.0/4.0HP
(9K/12K/18K/24K/36K)
SI
SI
L
L
N
N
L2
L1
NOTE:
Since there may be differences in some models‘ terminal blocks, wiring connection should be done according to letters on the
terminal block. Please disregard numbers in this case.

Over 8 in. (200mm)
Over 20 in. (500mm)
Over 14 in.
(350mm)
Over 6 in. (150mm)
Installation Instructions
4
Put Cloth or Paper
·Hanging Method
When hanging the unit, ensure a balance of the unit, check
safety and lift it up smoothly.
(1) Do not remove any packing materials.
(2) Hang the unit under packing condition with two ropes,
as shown in Fig. below.
·Handling
If the unit has no package, Please protect it with
cloth or paper.
CAUTION：
Before choosing the installation site, obtain the user’s approval.
·Where it is not exposed to strong wind.
·Where airflow is good and clean.
·Where it is not exposed to rain and direct sunshine.
·Where neighbors are not annoyed by operation sound or hot air.
·Where rigid wall or support is available to prevent the increase of operation sound or vibration.
·Where there is no risk of combustible gas leakage.
·Where it is at least 10 ft. (3m) away from the antenna of TV set or radio. An amplifier may be required for the
affected device.
·Install the unit horizontally.
·Please install it in an area not affected by snowfall or blowing snow. In areas with heavy snow, please install a
canopy, a pedestal and/or some baffle boards.
Avoid the following places for installation where air conditioner trouble is liable to occur.
·Where there is much machine oil.
·Salty places such as seaside.
·Where sulfide gas is generated such as a hot spring.
·Where there is high-frequency or wireless equipment.
NOTE:
When operating the air conditioner in low outside temperature, be sure to follow the instruction described below.
·Never install the outdoor unit in a place where its air inlet/outlet side may be exposed directly to wind.
·To prevent exposure to wind, install the outdoor unit with its air inlet side facing the wall.
·To prevent exposure to wind, it is recommended that a baffle board be installed on the air outlet side of the
outdoor unit.
Transportation and Handling before Installation
Installation Locations Selection
Over 12 in. (300mm)
Transport the product as close to the installation location as practical before unpacking.

Installation Instructions
5
(1) Use the washers to fasten the machine at the foundation bolts.
(2) When fastening the outdoor unit with the foundation bolts, the fasten holes position as the Fig.1.
(3) Fasten the outdoor unit as the Fig.2.
(4) Make sure to fasten the outdoor unit tight and horizontal to prevent noise from occurring when the machine is
oblique or inclined by strong breeze or earthquake.
(5) Do not drain off water to the public places to avoid skidding.
(6) The strong base (made of concrete, etc.) should be made. The appliance should be placed not less than
4in. (10cm) high to avoid being wet or corroded. Otherwise, it may cause damage to the appliance or reduce its
life time. (Fig.3)
Drainage Elbow and Drain Hose Installation
Outdoor Unit Installation
Install Drainage Elbow and Drain Hose
·The condensate water may drain from the outdoor unit
when the unit operates in heating mode. In order to avoid
disturbing neighbors and to protect the environment, it is
necessary to install a drainage elbow and a drain hose to
drain out the condensate water.
·Please do the drainage work before the indoor unit and
outdoor unit are connected. Otherwise, it will be difficult to
install drainage elbow after the machine becomes
immovable.)
Connect the drain hose· [field-supplied nside diameter:, i
5/8 in. (15mm)] as shown in the figure for drainage.
Drain hose
Drainage elbow
NOTE:
As the water might be freezing in the drain elbow, so
please avoid using it in cold regions.
Cut it off, if the bolts is too
long, or it will be
troublesome of the moving
in the future.
beton anchor bolt
[Unit: in. (mm)]
Model
A
B
C
D
E
F
d
1.0HP(9K)/
1.5HP(12K)
31-7/8
(810)
11-1/32
(280)
20-1/16
(510)
12-3/16
(310)
13-5/16
(338)
5-7/8
(150)
13/32*21/32
(10*17)
2.0HP(18K)
33-7/8
(860)
12-3/16
(310)
21-11/32
(542)
13-7/16
(341)
14-1/2
(368)
6-5/8
(168)
7/16*21/32
(11*17)
3.0/4.0HP
(24K/36K)
37-3/8
(950)
13-3/8
(340)
22-7/8
(580)
14-15/16
(380)
16-1/4
(414)
7-1/4
(185)
5/8
(15)
Concrete base, etc.
Min. 4 in. (10cm)
Setscrew
(at least 4)
About 16 in. (40cm)
About 4 in. (10cm)
Fig.1
Fig.2
Fig.3

6
Installation instructions
The shorter the refrigerant piping is, the better the performance will be. So the connecting pipe should be as short
as possible.
1. Piping Requirement
2. Piping Material
(1) Prepare locally-supplied copper pipes.
(2) Select clean copper pipes. Make sure there is no dust and moisture inside of the pipes. Blow the inside of the pipes
with nitrogen or dry air to remove any dust or foreign materials before connecting pipes.
Additional Refrigerant Charge
The unit has been filled with refrigerant, but if the pipe exceeds 24.6 ft. (7.6m), additional refrigerant (R410A)
charge is required.
For 1.0~1.5HP(9K~12K): Additional refrigerant charge =(L-24.6)×0.161 oz/ft
For 2.0~4.0HP(18K~36K): Additional refrigerant charge =(L-24.6)×0.376 oz/ft
Refrigerant Piping
Model
Outer Diameter of Pipe
in. (mm)
Gas
Liquid
1.0/1.5HP(9K/12K)
ø3/8(ø9.52)
ø1/4(ø6.35)
2.0HP(18K)
ø1/2(ø12.7)
ø1/4(ø6.35)
3.0HP(24K)
ø (ø15.88) 5/8
ø (ø9.52) 3/8
4.0HP(36K)
ø (ø19.05) 3/4
ø (ø9.52) 3/8
Pipe Length L
Height Difference H
Indoor Unit
Outdoor Unit
(3) Piping thickness and material of the pipe are shown as below.
Model
Max. Pipe
Length (L)
Max. Height
Difference (H)
Add. Refrigerant
[exceed 24.6 ft.
(7.6m)]
1.0/1.5HP(9K/12K)
82 ft. (25m)
49 ft. (15m)
0.161 oz/ft (15g/m)
2.0HP(18K)
98 ft. (30m)
49 ft. (15m)
0.161 oz/ft (15g/m)
3.0/4.0HP(24K/36K)
164 ft. (50m)
98 ft. (30m)
0.376 oz/ft (35g/m)
Thickness
[in. (mm)]
Diameter
[in. (mm)]
ø 1/4 (6.35)
ø 3/8 (9.52)
ø 3/4 (19.05)
ø 1/2 (12.70)
ø 5/8 (15.88)
1/32 (0.8)
1/32 (1.0)
1/32 (0.8)
1/32 (0.8)
1/32 (1.0)

3.Processing of Refrigerant Piping
(1) Pipe Cutting
·Cut the cooper pipe correctly with pipe cutter.
(2) Burrs Removal
·Completely remove all burrs from the cut cross section of the pipe.
·Put the end of the copper pipe downward to prevent burrs from
dropping in the pipe.
(3) Putting Nut on
·Remove flare nuts attached to indoor and outdoor units, then put
them on pipe having completed burr removal.
(Not possible to put them on after flaring work).
·Flare nut for pipe depends on the diameter of pipe.
(4) Flaring Work
·Perform flaring work with flaring tool as shown below.
(5) Check
·Compare the flared work with the figure below.
·If flare is noted to be defective, cut off the flared section and perform flaring work again.
危 险
！
C A U T I O N
When installing pipe through
the wall, secure a cap at the
end of the pipe.
Correct CorrectIncorrect Incorrect
Correct Incorrect
HoleHole
Attach a cap
or vinyl tape.
Attach a cap
or vinyl tape.
Attach a cap
or vinyl bag with
rubber band.
Do not place the pipe
directly on the ground.
Rain water can
enter.
Diameter
d ø
Tilted Uneven Burred
No good
Good
o
90
Burr Copper pipe
Spare
reamer
Pipe cutter
Flare nut
Copper pipe
Flaring tool
Clutch type Wing nut type
Die
Copper pipe Flare nut Copper pipe
Die
York
Smooth all around
Inside is shining without any scratches
4. Piping Connection
(1) Confirm that the valve is closed.
(2) Connect the indoor unit and the outdoor unit with field-supplied
refrigerant piping. Suspend the refrigerant piping at certain points
and prevent the refrigerant piping from touching the weak part of
the building such as wall, ceiling, etc.
(If touched, abnormal sound may occur due to the vibration of the
piping. Pay special attention in case of short piping length.)
(3) Tighten the flare nut with two spanners as shown in the right figure.
(4) Apply the refrigerant oil (field-supplied) thinly at the seat surface of
the flare nut and pipe before connecting and tightening.
And when tightening the flare nut, use two spanners.
(5) Outdoor refrigerant piping should connect with stop valve.
Double Spanner Work
Installation instructions
7
Pipe Size [in. (mm)] Torque [lbf ft.(N m)]
Tightening Torque for Flare Nut
[Unit: in. (mm)]
1/4 (6.35)
3/8 (9.52)
1/2 (12.7)
5/8 (15.88)
1/64
11/32 (9.1)
1/2 (13.2)
10/16 (16.6)
3/4 (19.7)
0.4)
(
ø 1/4 (6.35)
ø 3/4 (19.05)
ø 5/8 (15.88)
ø 1/2 (12.7)
ø 3/8 (9.52)
.
.
14.8 (20)
73.8 (100)
59.0 (80)
44.3 (60)
29.5 (40)

危 险
！
CAUTION
·Air Tight Check - Do use Nitrogen.
6. Vacuum Pumping and Refrigerant Charge
·Vacuum Pumping
Air Tight Procedure
Completion
of Ref.
Piping
Repairing
of Leakage
Part
Check of
Pressure
Decrease
Applying
Nitrogen
Gas
Pass
Procedure
Connect the gauge manifold using charging hoses with a nitrogen
cylinder to the check joints of the liquid line and the gas line stop
valves.
Perform the air tight test.
Don't open the gas line stop valves.
Apply nitrogen gas pressure of 550 psig (3.8 MPa).
Check for any gas leakage at the flare nut connections, or brazed
parts by gas leak detector or foaming agent.
Gas pressure doesn’t decrease, which is OK.
After the air tight test, release nitrogen gas.
·An excess or a shortage of refrigerant is the main cause of trouble to the unit. Charge the correct quantity of
refrigerant according to the description in the manual.
·Check for refrigerant leakage in detail. If a large refrigerant leakage occurs, it will cause difficulty in breathing or
harmful gases would occur if a fire is being used in the room.
Charge hose
(for R410A)
Installation instructions
Piping insulation procedure
Insulation
( )field-supplied
(6) After finishing connecting the refrigerant pipes, keep it warm with
the insulation material.
·For outdoor unit side, surely insulate every piping including valves.
·Cover piping joints with pipe cover.
·Using piping tape, apply taping starting from the entry of outdoor unit.
- Fix the end of piping tape with adhesive tape.
- When piping has to be arranged through above ceiling, closet or area
where temperature and humidity are high, wind additional commercially
sold insulation for prevention of condensation.
5. Air Tight Test
Clamp (field-supplied)
Insulation (field-supplied)
Refrigerant pipe
(field-supplied)
(1) Remove the service port cap of the stop valve on the gas pipe
side of the outdoor unit.
(2) Connect the manifold gauge and vacuum pump to the service port
of the stop valve on the gas pipe side of the outdoor unit.
(3) Run the vacuum pump. (Work for more than 15 minutes.)
(4) Check the vacuum with the gauge manifold valve, then close the
gauge manifold valve and stop the vacuum pump.
(5) Leave it as is for one or two minutes. Make sure that the pointer of
the manifold gauge remains in the same position. Confirm that the
pressure gauge shows -14.7psig (-0.101MPa or -760mmHg).
(6) Remove the manifold gauge quickly from the service port of the
stop valve.
(7) After refrigerant pipes are connected and evacuated, fully open
all stop valves on both sides of gas pipe and liquid pipe.
(8) Open adjusted valve to add refrigerant (the refrigerant is liquid).
(9) Tighten the cap to the service port .
(10) Retighten the cap.
(11) Leak test foam with halogen leak detector to check the flare nut
and brazing Carolina Department leaks. Use foam that does not
generate ammonia (NH3) in the reaction.
8
Indoor unit
Outdoor unit
Manifold
valve
Pressure
gauge
Vacuum
pump

！
危 险
！
·With tape material along the wire wrapped, sealed wiring holes, prevent the condensed water and insects.
·Tightly secure the power source wiring using the cord clamp inside the unit.
Note: Fix the rubber bushes with adhesive when conduit tubes to the outdoor unit are not used.
General Check
(1) Make sure that the field-selected electrical components (main power switches, circuit breakers, wires, conduit
connectors and wire terminals) have been properly selected according to the electrical data.
Make sure that the components comply with National Electrical Code (NEC).
(2) Check to ensure that the voltage of power supply is within ± 10% of nominal voltage and earth phase is contained
in the power supply wires. If not, electrical parts will be damaged.
(3) Check to ensure that the capacity of power supply is enough.
If not, the compressor will not be able to operate because of abnormal voltage drop at starting.
(4) Check to ensure that the earth wire is connected.
(5) Install a main switch, multi-pole main switch with a space of 1/8 in. (3.5mm) or more, single phase main switch
with a space of 1/8 in. (3.0mm) or more between each phases.
(6) Check to ensure that the electrical resistance is more than 2MΩ, by measuring the resistance between ground
and the terminal of the electrical parts. If not, do not operate the system until the electrical leakage is found and
repaired.
·Turn OFF the main power switch of the indoor unit and the outdoor unit and wait for more than 3 minutes before
. electrical wiring work or a periodical check is performed
·Check to ensure that the indoor fan and the outdoor fan have stopped before electrical wiring work or a periodical
check is performed.
·Protect the wires electrical parts etc from rats or other small animals If not protected rats may gnaw at , , . . ,
unprotected parts and at the worst a fire will occur , .
·Avoid the wiring from touching the refrigerant pipes plate edges and electrical parts inside the unit , .
, , . If not do the wires will be damaged and at the worst a fire will occur
·Install an ELB (Electric Leakage Break)in the power source .
, . If ELB is not used it will cause electric shock or fire at the worst
, ·This unit uses an inverter which means that it must be used an earth leak detector capable handing harmonics in
order to prevent malfunctioning of the earth leak detector itself.
·Do not use intermediate connection wires, stranded wires(see “Attentions when Connecting the Power Supply
Wiring”, extension cables or control line connection, because the use of these wires may cause heating, electric
shock or fire.
.·The tightening torque of each screw is shown as follows
: . · . . . ·M4 0.7 to 1 0 lbf ft (1 0 to 1 3 N m)
M5 1.5 to 1.8 lbf ft (2 0 to 2 5 N m): · . . . ·
M6 3.0 to 3.7 lbf ft (4 0 to 5 0 N m): · . . . ·
M8 6.6 to 8.1 lbf ft (9 0 to 11 0 N m): · . . . ·
M10 13.3 to 17.0 lbf ft (18 0 to 23 0 N m): · . . . ·
Keep the above tightening torque during wiring work .
WARNING
CAUTION
Installation instructions
Stand the cylinder upright when filling.
There is a siphon pipe inside,so the cyliner
need not to be upside-down to fill with liquid.
Turn the cylinder upside -down when filling.
Stand the cylinder upright when filling.
·Additional refrigerant charge
Filling a cylinder with an attached siphon
Filling other cylinders
The unit has been filled with refrigerant.
Please calculate additional charge according to “Piping Requirement” .
After finishing vacuum pump procedures, first exhaust air from charge hose, then open valves, charge refrigerant
as “liquid” type through liquid stop valve.
At the end, please close valves and record the refrigerant charge quantity.
Wiring
9

Installation instructions
10
Wires Connect Steps
(1) Remove the screws, maintenance plate and the valve cover.
(2) Pass transmitting cable and power supply through the two holes on the right side plate.
(3) Fasten the conduit connection to the right side plate using the lock nut.
(4) Connect the transmitting cable and power supply to the terminal.
(5) Tie the transmitting cable and power supply with the clamp tightly.
(6) After completing the wiring, seal the wiring hole with the .putty
(7) Put the maintenance plate and the valve cover after completion of the work.
(1) Wiring distribution cover removal
Unscrew the mounting screws to remove the wiring distribution cover.
(2) Fasten the power supply cable and the transmitting cable to the conduit holder using the lock nut.
(3) Connect the power supply cable and the transmitting cable to terminal.
(4) Fasten the power supply cable and the transmitting cable with the cable clamp.
(5) Be sure to seal the holes when applying the putty.
Place the cables side to side. (Do not overlap the cables.)
(6) Put the wiring distribution cover back after completion of the work.
Lock nut
Lock nut Conduit plate
Conduit plate
Conduit
connector
Transmitting
cable
Right side plate
Wiring
distribution
cover
Conduit
connector
Transmitting
cable
Power supply
4.0HP(36K)
1.0~3.0HP(9K~24K)
1.0~2.0HP(9K~18K) 3.0HP(24K)
Maintenance plate
Valve cover
Conduit connector for power supply
Lock nut(Qty:2)
Transmitting cable
Power supply
Right side plate
Conduit connector for
transmitting cable Maintenance
plate
Valve cover
Right side plate
Hole
Conduit connector
Lock nut
Power supply

Do not operate the system until all the check points have been cleared.
(A) Check to ensure that the stop valves of the outdoor unit are fully opened.
(B) Check to ensure that the electric wires have been fully connected.
(C) Check to ensure that the electrical resistance is more than 2MΩ, by measuring the resistance between ground
and the terminal of the electrical parts. If not, do not operate the system until the electrical leakage is found and
repaired.
Trial run function identification
Turn ON the appliance to proceed trial run.
Pay attention to the following items while the system is running.
Do not touch any of the parts by hand at the discharge gas side, since the compressor chamber and the pipes at the
discharge side are heated higher than 194℉ (90℃).
Trial run should be performed after refrigerant piping,drain,wiring,etc. have been finished.
The air conditioner is provided with a crankcase heater, check to ensure that the switch on the main
power source has been ON for more than 6 hours ahead of power on preheating, otherwise it might
damage the compressor!
·Turn off the power after trail run is finished.
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.
CAUTION
Installation instructions
Trial Run
11
NOTE：
(1) Follow local codes and regulations when selecting field wires, and all the above are the minimum wire size.
(2) Use copper supply wires.
(3) When the transmitting cable is longer than 49 ft. (15m) , a larger wire size should be selected.
(4) Install main switch and ELB for each system separately. Select the high response type ELB that is acted within
0.1second.
Electrical Data
Max. Running Current (A): REFER TO NAMEPLATE
1. When connecting the terminal block using stranded wire, 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 in place.
2. When connecting the terminal block using a single core wire, be
sure to perform curing.
<Attentions when Connecting the Power Supply Wiring>
Model
Power Supply
ELB
Power Source
Cable Size
Transmitting
Cable Size
Fuse or
Circuit
Breaker (A)
Rated Current
(A)
Nominal Sensitive
Current (mA)
1.0HP(9K)
208/230V ~/60Hz
15
30
3×14AWG
4×16AWG
15
1.5HP(12K)
208/230V ~/60Hz
20
30
3×14AWG
4×16AWG
20
2.0HP(18K)
208/230V ~/60Hz
20
30
3×12AWG
4×16AWG
20
3.0HP(24K)
208/230V ~/60Hz
35
30
3×12AWG
4×16AWG
35
4.0HP(36K)
208/230V ~/60Hz
45
30
3×10AWG
4×16AWG
45
Single core wire
Terminal
Round crimp-style terminal Stranded wire
Covered part

Specifications in this document are subject to change without notice, in order that Hitachi-Johnson Controls Air Conditioning, Inc. may
bring the latest innovations to their customers.
© 20 21 Johnson Controls Air Conditioning, Inc.Hitachi- 2021.03 Version.A Printed in China
Hitachi-Johnson Controls Air Conditioning, Inc.