Hitachi RAS-2.0WHVN Installation Manual

FOR SERVICE PERSONNEL ONLY
EN
1
OUTDOOR UNIT
RAS-2.0WHVN
MODEL
RAS-2.5WHVN
RAW-35NHB
SAFETY PRECAUTION
Read the safety precautions carefully before operating the unit.
The contents of this section are vital to ensure safety. Please pay special attention to the following sign.
WARNING .......... Incorrect methods of installation may cause death or serious injury.
CAUTION .......... Improper installation may result in serious consequence.
Make sure to connect earth line.
This sign in the figures indicates prohibition.
Be sure that the unit operates in proper condition after installation. Explain to customer the proper operation and maintenance of
the unit as described in the user' s guide. Ask a customer to keep this installation manual together with the instruction manual.
WARNING
Please request your sales agent or qualified technician to install your unit. Water leakage, short circuit or fire may occur if you do the
installation work yourself.
Please observe the installation stated in the installation manual during the process of installation. Improper installation may cause
water leakage, electric shock and fire.
Make sure that the units are mounted at locations which are able to provide full support to the weight of the units. If not, the units may
collapse and impose danger.
Observe the rules and regulations of the electrical installation and the methods described in the installation manual when dealing
with the electrical work. Use cables which are approved official in your country. Be sure to use the specified circuit. A short circuit and
fire may occur due to the use of low quality wire or improper work.
Be sure to use the specified cables for connecting the indoor and outdoor units. Please ensure that the connections are tight after the
conductors of the wire are inserted into the terminals to prevent the external force is being applied to the connection section of the
terminal base. Improper insertion and loose contact may cause over-heating and fire.
Please use the specified components for installation work. Otherwise, the unit may collapse or water leakage, electric shock, fire or
stronger vibration may occur.
Be sure to use the specified piping set for R410A. Otherwise, this may result in broken copper pipes or faults.
When installing or transferring the unit to another location, make sure that air other than the specified refrigerant (R410A)
does not enter the refrigeration cycle. If other air should enter, the pressure level of the refrigeration cycle may increase abnormally
which could result in a rupture and injury.
Be sure to ventilate fully if a refrigerant gas leak while at work. If the refrigerant gas comes into contact with fire, a poisonous gas may
occur.
After completion of installation work, check to make sure that there is no refrigeration gas leakage. If the refrigerant gas leaks into the
room, coming into contact with fire in the fan-driven heater, space heater, etc., a poisonous gas may occur.
Unauthorized modifications to the units may be dangerous. If a breakdown occurs please call a qualified heat pump
technician or electrician. Improper repairs may result in water leakage, electric shock and fire, etc.
Be sure to connect the earth line from the power supply wire to the outdoor unit and between
the outdoor and indoor unit. Do not connect the earth line to the gas tube, water pipe, lighting rod or the earth line of the
telephone unit. Improper earthing may cause electric shocks.
When finishing the refrigerant collection (pumping down), stop the compressor and then remove the coolant pipe.
If you remove the refrigerant pipe while the compressor is operating and the service valve is released, air is sucked and a
pressure in the freezing cycle system will build up steeply, causing an explosion or injury.
When installing the unit, be sure to install the refrigerant pipe before starting the compressor.
If the refrigerant pipe is not installed and the compressor is operated with the service valve released, air is sucked and the
pressure level of the refrigeration cycle may increase abnormally which could result in a rupture and injury.
The electric cables should neither be reworked nor added.
Make sure to use an exclusive circuit breaker.
Otherwise fire or electric shock might occur by connection failure, isolation failure or over current.
Make sure to connect cables to terminal properly and terminal cover should close firmly.
Otherwise, over heating at terminal contact, fire or electric shock might occur.
Make sure that there is no dust on any connected points of electric cables and fix firmly.
Otherwise, fire or electric shock might occur.
Please mount the Outdoor unit of stable ground to prevent vibration and increase of noise level.
Decide the location for piping after sorting out the different types of pipe available.
When removing side cover, please pull the handle after undoing the hook by pulling it downward. Reinstall the side cover in the
reverse order of the removal.
RAS-2.0WHVN RAS-2.5WHVN
RAW-35NHB
Please face this side(suction
Please remove side cover
Please face this side
side) of theunit to the wall.
(suction side) of the when connecting the piping
unit to the wall. and connecting cord.
Pull downward
Do not touch the suction port, bottom surface,or aluminum fin of the outdoor unit.Failure to do so
CAUTION
may cause an injury.
CONDENSED WATER DISPOSAL OF OUTDOOR UNIT
There is holes on the base of Outdoor unit for condensed water to exhaust.
In order to flow condensed water to the drain, the unit is installed on a stand or a block so that the unit is 100mm above the
ground as shown figure. Join the drain pipe to one hole.
After installation, check whether the drain pipe clings to the base firmly.
RAS-2.0WHVN
RAW-35NHB
DRAIN HOLE
BASE
BUSH
above
Push Push
100mm
DRAIN HOLE 2 BUSH
DRAIN PIPE
Outer diameter : 1
16 mm or more
Install the outdoor unit horizontally and make sure that condensate drains away.
In case of using in chilly area pecially, in case that there are many snows by very cold in chilly area, condensed water freezes
on the base and may result not to drain. In this case, please remove the bush and the drain pipe at the bottom of unit.(Left and
center near discharge portion of air, each 1 place).It becomes smooth drain.Ensure that the distance from the drain hole to
the ground is 250 mm or more.
CAUTION
A circuit breaker must be installed in the house distribution box for the direct
connected power supply cables to the outdoor unit. In case of other installations
a main switch with a contact gap or more than 3mm has to be installed.
Without a circuit breaker, the danger of electric shock exists.
Do not install the unit near a location where there is flammable gas.
The outdoor unit may catch fire if flammable gas leaks around it.
An IEC approved power cord should be used. Power cord type: NYM.
THE CHOICE OF MOUNTING SITE
(P lease note the following matters and obtain permission from customer before installation.)
WARNING
The Outdoor unit must be mounted at a location which can support heavy
weight. Otherwise, noise and vibration will increase.
CAUTION
Selecting the installation location: Suitable location that will reduce the impact
from rain and direct sun that may affect the unit performance.
Besides,ventilation must be good and clear of obstruction .
The air blown out of the unit should not point directly to animals or
The clearances of the unit from top, left, right and front are specified in figure
below . At least three of the above sides must be open air .
Be sure that the hot air blown out of the unit and noise do not disturb the
neighbourhood.
Do not install at a location where there is flammable gas,steam, oil and smoke.
The location must be convenient for water drainage.
Place the Outdoor unit and its connecting cord at least 1 m away from the antenna
or signal line of television, radio or telephone. This is to avoid noise interference.
Figure showing the Installation of Outdoor Unit.
Names of Outdoor Components
Dimension of Mounting
No.
Stand of the Outdoor unit
RAS-2.0WHVN
1
RAW-35NHB Mounting Stand
50
12
35 2
500
125
750
RAS-2.5WHVN
Mounting Stand
57
12
39
500 146
792
(unit : mm)
The clearances of the
unit from top, left, right
and front are specified
in figure below. At least
three of the above sides
must be open air.
give clearance as wide as possible
above 200mm
Please remove side
cover when connecting above 100mm
the piping and connecting
cord.
above 300mm
For outdoor unit installation,allow
at least 2 sides of space around
the unit to ensure ventilation flue.
Pull downward
Drain hose
Drains the dehumidified water from the indoor unit to the
outdoor during "cooling" or "dehumidifying" operation.
Piping and Wiring
Air inlets (Rear and left sides)
Air outlet
When" heating"operation is performed,
cool air blows and when "cooling" or
"dehumidifying" operation is performed,
warm air blows.
About the outdoor unit:
When "Stop" is selected during operation
of the indoor unit, the fan of the outdoor
RAS-2.5WHVN
unit continues turning for 10 to 60
seconds to cool the electric parts down.
BASE In heating operation, condensate or
water due to defrosting will flow.
Do not cover the drain port of the outdoor
above
unit because such water may freeze in
100mm
the chilly area.
DRAIN HOLE When the outdoor unit is hung on the
2 BUSH
wall, install the bush and drain pipe
Outer diameter :
1 DRAIN PIPE
on the drain port and drain water.
16 mm or more
WIDTH (mm) HEIGHT (mm) DEPTH (mm)
MODEL
RAS-2.0WHVN
750
RAW-35NHB
RAS-2.5WHVN 792
1 Preparation of Pipe
Use a pipe cutter to cut the copper pipe and remove burr.
Trimming tool
Copper pipe
Before flaring, please put on the flare nut.
Die
Die
A Please use
exclusive tool for
refrigerant R410 .
Copper pipe
2 Pipe Connection
In case of removing flare nut of a indoor unit, first remove a nut of small
diameter side, or a seal cap of big diameter side will fly out. Free from
water into the piping when working.
CAUTION
Be sure to tighten the flare nut to the specified torque with a torque wrench.
plants.
If the flare nut is overtightened, the nut may be split after a long period has
passed, and may cause a refrigerant leak.
Please be careful when bending
the copper pipe.
Screw in manually while adjusting
the center. After that, use a torque
wrench to tighten the connection.
Flare nut
Torque
Wrench
Item Qty
wrench
Drain Pipe
1
WARNING THIS APPLIANCE MUST BE EARTHED.
Bush
Procedures of Wiring
1
RAS-2.0WHVN/RAW-35NHB
Bush Bush
Indoor unit
2
RAS-2.5WHVN
Main
E.Heater
power
Main
switch Earth
Note: Refer to Indoor Unit installation manual for other wiring procedures.
Detail of Cutting the Connecting Cord
Outdoor Unit
The refrigerating machine oil is 160mm
easily affected by moisture. Use
10mm
1
caution to prevent water from
entering the cycle. Strip
2
wires
The difference in height between
3
the indoor and outdoor unit
should be kept below 10m. Green +
Yellow
The connecting pipe, no matter
20mm
big or small, should all be
insulated with insulation pipe and 100mm
then wrapped with vinyl tape.
WARNING
(The insulator will deteriorate if
it is not wrapped with tape).
The naked part of the wire core should be 10mm fix it to the terminal tightly. Then
try to pull the individual wire to check if the contact is tight. Improper insertion may
above 50mm
burn the terminal.
give clearance as wide Please refer to the manual for wire connection and the wiring technique should
as possible
meet the standard of the electrical installation.
There is an AC voltage drop between the LN terminal if the power is on. Therefore,
above 200mm
be sure to remove the plug from its socket.
When the fuse (F5 or F6) has been blown out by the improper connection of power
cable, it can be restored by the attached reserve fuse.
Please exchange the blown-out fuse after making sure the right connection.
Power Source And Operation Test
Power Source
WARNING
Never remodel the power plug nor extend the long-distance
cord.
Keep additional length for the power cord and do not render
the plug under external force as this may cause poor contact.
Do not fix the power cord with U-shape nail.
The power cable easily generates heat. Do not bring the
cable together with a wire or vinyl tie.
Operation test
Refer to Indoor unit installation manual for operation test
Explain to your customer the proper operation procedures as
described in the user' s manual.
If the indoor unit won't operate, check the cable for correct
connection.
548 288
600 299
3 Remove of Air From The Pipe And Gas Leakage Inspection
Procedures of using Vacuum Pump for Air Removal
As shown in right figure, remove the cap
CAUTION
of valve core. Then, connect the charge
Remove burr and jagged edge will cause leakage.
hose. Remove the cap of valve head.
1
Point the side to be trimmed downwards during
Connect the vacuum pump adapter to the
trimming to prevent copper chips from entering
vacuum pump and connect the charge
the pipe.
hose to the adapter.
Outer A (mm) Rigid Flaring Tool
Fully tighten the "Hi" shuttle of the manifold
D a i m e e t ( r ) Ø For R410A tool F r o R 2 2 o t l o
valve and completely unscrew the "Lo"
. 6 5 3 / 1 ( ) " 4 0 - 0.5 1 0 . shuttle. Run the vacuum pump for about
10-15 minutes, then completely tighten the
A
. 9 2 5 / 3 ( ) " 8 0 - 0.5 1 0 .
"Lo" shuttle and switch off the vacuum
12.7 (1/2") 0 - 0.5 1.0
pump.
2
Loosen the spindle of the service valve
with small diameter by 1/4 turn and
tighten the spindle immediately after 5
to 6 seconds.
Remove the charging hose from the
service valve.
Completely unscrew the spindle of the
service valve (at 2 places) in anticlockwise
3
direction to allow the flow of refrigerant
Outer diameter Torque N·m
(using Hexagonal Wrench key).
of pipe (ø) (kgf·cm)
Tighten the cap of valve head. Check the
Small diameter side 6.35 (1/4") 13.7-18.6 (140 - 190)
4 cap's periphery if there is any gas leakage.
9.52 (3/8") 34.3-44.1 (350 - 450)
The task is then completed.
Large diameter side
12.7 (1/2") 44.1-53.9 (450 - 550)
Small diameter side 6.35 (1/4") 19.6-24.5 (200 - 250) Gas leakage inspection
Valve
9.52 (3/8") 19.6-24.5 (200 - 250)
head cap Please use gas leakage detector to check if leakage occurs at
Large diameter side
12.7 (1/2") 29.4-34.3 (300 - 350)
connection of Flare nut as shown on the right.
If gas leakage occurs, further tighten the connection to stop leakage.
Valve core cap 12.3-15.7 (125 - 160)
Leave some space in the connecting cord for maintenance purpose and be
sure to secure it with the cord band.
Secure the connecting cord along the coated part of the wire using the cord
WARNING
Communication
band.Do not exert pressure on the wire as this may cause overheating or fire.
(Power IDU PCB)
Wiring of the Outdoor Unit
Outdoor unit
Please remove the side cover for wire connection.
If you cannot attach the side plate due to the connection cord, please press the connecting
cord in the direction to the front panel to fix it.
Be sure that the hooks of the side cover fixed in certainly. Otherwise water leakage may occur
Main
and this causes short circuit or faults.
WARNING
The connecting cord should not touch to service valve and pipes.
Outdoor power
(it becomes high temperature in heating operation.)
Main
Earth switch Checking for the electric source and the voltage range
Before installation, the power source must be checked and necessary wiring work must be completed.
To make the wiring capacity proper, use the wire gauge list below for the wiring from house distribution
fuse box to the outdoor unit in consideration of the blocked rotor current.
erminal marking
T
L N 1 2 3
Connecting cord
Cord band
RAS-2.0WHVN
RAW-35NHB
Investigate the power supply capacity and other
electrical conditions at the installing location.
Depending on the model of unit to be
installed, request the customer to make arrangements
for the necessary electrical work etc.
The electrical work includes the wiring work up the
outdoor unit. In localities where electrical conditions
are poor, use of a voltage regulation is recommended.
Following Regulation EU No. 517/2014 on Certain Fluorinated Greenhouse gases, it is mandatory to fill in the
label attached to the unit with the total amount of refrigerant charged on the installation.
Do not vent R410A into the atmosphere: R410A are fluorinated greenhouse gases covered by the Kyoto
protocol global warming potential (GWP) R410A = 2088.
Tn of CO2 equivalent of fluorinated greenhouse gases contained is calculated by indicated GWP * Total
Charge (in kg) indicated in the product label and divided by 1000.
MODEL
RAS-2.0WHVN
RAW-35NHB
RAS-2.5WHVN
Johnson Controls-Hitachi Air Conditioning Wuhu Co, Ltd
No.2 Qiluoshan Road
Wuhu City, Anhui Province 241009- CHINA
When the meter reaches - 101KPa
(-76cmHg) during pumping, fully
tighten the shuttle.
Meter showing
pressure
Closed
R410A
Charge
Manifold
hose
valve
Vacuum
Valve pump
Vacuum
pump
adapter
Valve
When pumping starts, slightly
loosen the flare nut to check of
air sucked in. Then tighten the
flare nut.
The body of service valve
Cap of
valve core
Cap of valve head
Hexagonal wrench Key
Cap of valve
head
cover L N 1 2 3 cover
Earth Earth
terminal terminal
Cord band
RAS-2.5WHVN
IMPORTANT (Outdoor unit only)
Fuse Capacity
RAS-2.0WHVN 15A time delay fuse
RAW-35NHB
RAS-2.5WHVN 25A time delay fuse
Wire length Wire cross-section
up to 6m 1.5mm 2
up to 15m 2.5mm 2
up to 20m 4.0mm 2
UNIT GROSS OUTDOOR UNIT REFRI-
GERANT CHARGE (kg)
WEIGHT (kg)
35.5 1.2
45.0 1.4
PMML0450 rev.1 - 03/2017