Hitachi RAM-70QH4 Installation Manual page 2

WARNING
• The naked part of the wire core should be 10mm and fix it to the terminal tightly. Then try to pull the
individual wire to check if the contact is tight. Improper insertion may burn the terminal.
• Be sure to use only wire specified for the use of air conditioner.
• Please refer to the installation manual for wire connection and the wiring technique should meet the
standards of electrical installation.
• There is an AC voltage drop between the LN terminals if the power is on. Therefore, be sure to
switch off the power supply.
WARNING
• Connecting cord should be connected according to Fig. 3-1, that the Indoor unit No.
agree with terminal board No. of Outdoor unit.
• Be sure to fix the connecting cord with the band as shown below. Otherwise water
leakage causes short circuit or faults.
• Below figure shows a case of RAM-80QH4.
Terminal indications
Indoor unit Indoor unit Indoor unit Indoor unit Main
No. 1 No. 2 No. 3 No. 4 Switch
Brown Red Brown Red Brown Red Brown Red
Connecting cord shall put away
in the inside of side plate after
fixation by cord band.
Fig. 3-3
• When putting 2 connecting cords through the band.
WARNING
Screw
• Leave some space in the connecting cord
Insulating plate
for maintenance purpose and be sure to
secure it with the cord band.
• Secure the connecting cord along the
Cord
band
coated part of the wire using the cord band.
Do not exert pressure on the wire as this
Connecting cord
may cause overheating or fire.
3.3 Preparation of pipe
• Use a pipe cutter to cut the copper pipe.
CAUTION
Trimming tool
• Jagged edge will cause leakage.
• Point the side to be trimmed downwards
Copper pipe
during trimming to prevent copper chips
from entering the pipe.
• Before flaring, please put on the flare nut.
Die
Die • Please use exclusive tool.
A
Copper pipe
Outer A (mm) Rigid Flaring tool
Diameter (ø)
For R410A tool For R22 tool
6.35 (1/4") 0 - 0.5 1.0
9.52 (3/8") 0 - 0.5 1.0
12.7 (1/2") 0 - 0.5 1.0
3.4 Pipe connection
Connecting the pipe to outdoor unit
(1) Remove the flare nut and seal cap from the service valve.
(2) Apply refrigerator oil to the service valve and the flared portion of the pipe.
(3) Using a wrench, securely tighten.
Tighten all the way by hand.
Do not tighten all at once, but tighten it while fitting the
flared surface to the pipe.
Fig. 3-4
In case of removing flare nut of an Indoor unit, first remove a nut of small diameter
side, or a seal cap of large diameter side will fly out. Free from water into the
CAUTION
piping when working.
< S552 : B >
• 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.
Outer diameter
of pipe (ø)
Flare nut Small diameter side 6.35 (1/4") 13.7-18.6 (140-190)
9.52 (3/8") 34.3-44.1 (350-450)
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)
Valve head
9.52 (3/8") 19.6-24.5 (200-250)
Torque
cap
Large diameter side
Wrench
wrench
12.7 (1/2") 29.4-34.3 (300-350)
Valve core cap 12.3-15.7 (125-160)
• Install the unit in a stable place to minimize vibration or noise.
• After arranging the cords and pipes, secure them in place.
RAM-70QH4
Connecting cord should
Pipe connection port for Indoor unit 1
have arranged with piping
using tape previously.
Pipe connection port for Indoor unit 2
Indoor unit No. 1
Pipe connection port for Indoor unit 3
Indoor unit No. 2
Indoor unit No. 3
RAM-80QH4
Connecting cord should
Pipe connection port for Indoor unit 1
have arranged with piping
using tape previously.
Pipe connection port for Indoor unit 2
Indoor unit No. 1
Pipe connection port for Indoor unit 3
Indoor unit No. 2
Pipe connection port for Indoor unit 4
Indoor unit No. 3
Indoor unit No. 4
Fig. 3-5
• Hold the handle of the side cover, slide down and take off the corner hook, then pull. Reverse these
steps when installing.
4. Air purging
After completing the piping, purge the air from the connected pipe and indoor unit. If this work is not
done, the discharge pressure will abnormally rise so that the refrigerating cycle unit will possible be
damaged or inoperable.
4.1 Air purging by using vacuum pump
Air purging by vacuum pump
Remove the valve cap of valve core.
When the meter reaches –101KPa
(–76cmHg) during pumping, fully
tighten the shuttle.
Meter showing pressure
Connect the charge hoses to the vacuum
pump and the charge port of the valve core
large dia. pipe side service valve,
respectively.
Charge hose
Valve
Valve
Fully open the LO knob of the manifold valve.
Vacumn
Put the vacuum pump into run.
pump adapter
Vacuum for more than 10 min.
Close the LO knob of the manifold valve. When pumping starts, slightly loosen the flare nut
to check of air sucked in. Then tighten the flare nut.
Fig. 4-1
Stop the vacuum pump.
Service valve on wide pipe
Remove the valve cap from the spindle of
Valve cap
the service valve.
Service valve on narrow pipe
Valve cap
Turn the spindles of each large and small dia.
pipe side service valves full counterclockwise
Valve cap of valve core
until they are securely tightened. Then
retighten them more than 10 degrees [using
a hexagon wrench key (4mm ) without
fail].
Disconnect the charge hose from the service
valve.
O-Ring
Tighten the valve cap of valve core.
[Torque 12.3-15.7 N·m (125-160 kgf·cm)]
Torque N·m
Pipe
(kgf·cm)
Seal cap
Attach the valve cap to the spindles of each
Flare nut
large and small dia. pipe side service valves.
Tighten the valve cap of the spindle.
[Torque 19.6-24.5 N·m (200 - 250 kgf·cm)]
Gas Leakage Inspection
Please use gas leakage detector to check if leakage
occurs at connection of flare nut as shown on the right.
If gas leakage occurs, further tighten the connection to
stop leakage. (Use the detector provided for R410A.)
COOL/HEAT CAPACITY SPEC, FOR INDOOR UNITS COMBINATIONS
RAM-70QH4
COOLING
POSSIBLE OUTDOOR UNIT
COMBINATIONS
CAPACITY RATING
POWER AMPERE
TO OPERATE
(kW) (RANGE)
CONSUMPTION (A)
(W) 230V
2.50 780
2.5 3.4
(1.00~2.80) (360~980)
3.50 1160
3.5 5.1
(1.00~3.90) (360~1280)
4.00 1340
4.0 5.9
(1.00~4.50) (360~1480)
5.00 1910
5.0 8.4
(1.00~5.60) (360~2100)
2.50+2.50 1560
2.5+2.5 6.9
(1.50~5.60) (640~1720)
2.50+3.50 1990
2.5+3.5 8.7
(1.50~6.60) (640~2190)
2.50+4.00 2220
2.5+4.0 9.7
(1.50~7.00) (640~2440)
2.50+4.50 2580
2.5+5.0 11.3
(1.50~7.60) (640~2840)
3.50+3.50 2580
3.5+3.5 11.3
(1.50~7.60) (640~2840)
3.30+3.70 2580
3.5+4.0 11.3
(1.50~7.60) (640~2840)
2.90+4.10 2580
3.5+5.0 11.3
(1.50~7.60) (640~2840)
3.50+3.50 2580
4.0+4.0 11.3
(1.50~7.60) (640~2840)
3.10+3.90 2580
4.0+5.0 11.3
(1.50~7.60) (640~2840)
2.50+2.50 1660
2.5+2.5 7.3
(1.50~5.50) (640~1830)
2.30+3.30 1860
2.5+3.5 8.2
(1.50~6.20) (640~2050)
2.20+3.40 1860
2.5+4.0 8.2
(1.50~6.20) (640~2050)
2.80+2.80 1860
3.5+3.5 8.2
Closed (1.50~6.20) (640~2050)
2.33+2.33+2.33 2180
2.5+2.5+2.5 9.6
(3.00~7.90) (650~3180)
R410A
Manifold valve
2.05+2.05+2.90 2180
Vacumn 2.5+2.5+3.5 9.6
(3.00~7.90) (650~3180)
pump
1.95+1.95+3.10 2180
2.5+2.5+4.0 9.6
(3.00~7.90) (650~3180)
1.75+1.75+3.50 2180
2.5+2.5+5.0 9.6
(3.00~7.90) (650~3180)
1.80+2.60+2.60 2180
2.5+3.5+3.5 9.6
(3.00~7.90) (650~3180)
1.75+2.45+2.80 2180
2.5+3.5+4.0 9.6
(3.00~7.90) (650~3180)
1.60+2.20+3.20 2180
2.5+3.5+5.0 9.6
(3.00~7.90) (650~3180)
1.70+2.65+2.65 2180
2.5+4.0+4.0 9.6
(3.00~7.90) (650~3180)
2.33+2.33+2.33 2180
3.5+3.5+3.5 9.6
(3.00~7.90) (650~3180)
2.20+2.20+2.60 2180
3.5+3.5+4.0 9.6
(3.00~7.90) (650~3180)
Two units ... Each unit is connected to each compressor.
Two units ... Two units are connected to one compressor.
Fig. 4-2
Valve cap
Stopper Valve cap of valve core
RAM-80QH4
Valve core
POSSIBLE
COMBINATIONS
CAPACITY RATING
Pipe TO OPERATE
(kW) (RANGE)
Spindle
Fig. 4-3 2.50
2.5
(1.00~2.80)
3.50
3.5
(1.00~3.90)
The refrigerant channel is opened so that the
4.00
4.0
refrigerant will flow from the outdoor unit into (1.00~4.50)
the indoor unit. 5.00
5.0
(1.00~5.60)
2.50+2.50
2.5+2.5
(1.50~5.60)
2.50+3.50
2.5+3.5
(1.50~6.60)
2.50+4.00
2.5+4.0
(1.50~7.00)
2.50+4.50
2.5+5.0
(1.50~7.60)
3.50+3.50
3.5+3.5
(1.50~7.60)
3.50+4.00
3.5+4.0
(1.50~8.00)
3.10+4.40
3.5+5.0
(1.50~8.00)
4.00+4.00
4.0+4.0
(1.50~8.20)
3.60+4.40
4.0+5.0
(1.50~8.20)
4.00+4.00
5.0+5.0
(1.50~8.20)
(Reference value)
2.50+2.50
2.5+2.5
HEATING
(1.50~5.50)
2.30+3.30
OUTDOOR UNIT
2.5+3.5
(1.50~6.20)
CAPACITY RATING
POWER AMPERE 2.20+3.40
2.5+4.0
(kW) (RANGE) (1.50~6.20)
CONSUMPTION (A)
(W) 230V 2.80+2.80
3.5+3.5
(1.50~6.20)
3.90 1100
4.8 2.50+2.50+2.50
(1.10~4.70) (320~1280)
2.5+2.5+2.5
(3.00~8.20)
4.80 1380
2.30+2.30+3.40
6.1
(1.10~5.80) (320~1750) 2.5+2.5+3.5
(3.00~8.50)
6.00 1770
2.20+2.20+3.60
7.8
2.5+2.5+4.0
(1.10~6.80) (320~1920)
(3.00~8.50)
6.70 2070 2.00+2.00+4.00
9.1 2.5+2.5+5.0
(1.10~7.60) (320~2170)
(3.00~8.50)
3.90+3.90 2290 2.00+3.00+3.00
10.1 2.5+3.5+3.5
(3.00~8.50)
(1.50~8.60) (600~2520)
2.00+2.90+3.10
3.90+4.80 2690
2.5+3.5+4.0
11.8 (3.00~8.50)
(1.50~9.60) (600~2960)
1.80+2.60+3.60
3.50+5.50 3200 2.5+3.5+5.0
(3.00~8.50)
14.1
(1.50~9.90) (600~3520)
2.00+3.00+3.00
3.00+6.00 3200 2.5+4.0+4.0
(3.00~8.50)
14.1
(1.50~9.90) (600~3520)
1.70+2.80+3.50
2.5+4.0+5.0
4.70+4.70 3200
(3.00~8.50)
14.1
(1.50~10.30) (600~3520)
2.66+2.66+2.66
3.5+3.5+3.5
(3.00~8.50)
4.50+4.90 3200
14.1
(1.50~10.30) (600~3520)
2.60+2.60+2.80
3.5+3.5+4.0
(3.00~8.50)
3.90+5.50 3200
14.1
(1.50~10.30) (600~3520) 2.40+2.40+3.20
3.5+3.5+5.0
(3.00~8.50)
4.70+4.70 3200
14.1 2.40+2.80+2.80
(1.50~10.30) (600~3520)
3.5+4.0+4.0
(3.00~8.50)
4.20+5.20 3200
14.1 2.00+2.00+2.00+2.00
(1.50~10.30) (600~3520)
2.5+2.5+2.5+2.5
(3.00~9.20)
2.90+2.90 1580
1.85+1.85+1.85+2.45
6.9
(1.50~6.40) (600~1740) 2.5+2.5+2.5+3.5
(3.00~9.20)
2.60+3.60 1930
1.80+1.80+1.80+2.60
8.5
(1.50~6.80) (600~2120) 2.5+2.5+2.5+4.0
(3.00~9.20)
2.40+3.80 1930
1.70+1.70+2.30+2.30
8.5
2.5+2.5+3.5+3.5
(1.50~6.80) (600~2120) (3.00~9.20)
3.10+3.10 1930
8.5
Two units ... Each unit is connected to each compressor.
(1.50~6.80) (600~2120)
3.20+3.20+3.20 2480 Two units ... Two units are connected to one compressor.
10.9
(3.00~10.60) (620~3520)
2.80+2.80+4.00 2480
10.9
(3.00~10.60) (620~3520)
2.60+2.60+4.40 2480
10.9
(3.00~10.60) (620~3520)
2.35+2.35+4.90 2480
10.9
(3.00~10.60) (620~3520)
2.53+3.53+3.53 2480
10.9
(3.00~10.60) (620~3520)
2.40+3.40+3.80 2480
10.9
(3.00~10.60) (620~3520)
2.10+3.10+4.40 2480
10.9
(3.00~10.60) (620~3520)
2.20+3.70+3.70 2480
10.9
(3.00~10.60) (620~3520)
3.20+3.20+3.20 2480
10.9
(3.00~10.60) (620~3520)
3.10+3.10+3.40 2480
10.9
(3.00~10.60) (620~3520)
(Reference value)
COOLING HEATING
OUTDOOR UNIT OUTDOOR UNIT
CAPACITY RATING
POWER AMPERE POWER AMPERE
(kW) (RANGE)
CONSUMPTION (A) CONSUMPTION (A)
(W) 230V (W) 230V
780 3.90 1100
3.4 4.8
(360~980) (1.10~4.70) (320~1280)
1160 4.80 1380
5.1 6.1
(360~1280) (1.10~5.80) (320~1750)
1340 6.00 1770
5.9 7.8
(360~1480) (1.10~6.80) (320~1920)
1910 6.70 2070
8.4 9.1
(360~2100) (1.10~7.60) (320~2170)
1560 3.90+3.90 2290
6.9 10.1
(640~1720) (1.50~8.60) (600~2520)
1990 3.90+4.80 2690
8.7 11.8
(640~2190) (1.50~9.60) (600~2960)
2220 3.50+5.50 3200
9.7 14.1
(640~2440) (1.50~9.90) (600~3520)
2580 3.00+6.00 3200
11.3 14.1
(640~2840) (1.50~9.90) (600~3520)
2580 4.70+4.70 3200
11.3 14.1
(640~2840) (1.50~10.30) (600~3520)
2720 4.50+4.90 3200
11.9 14.1
(640~2990) (1.50~10.30) (600~3520)
2720 4.00+5.60 3300
11.9 14.5
(640~2990) (1.50~10.60) (600~3630)
2760 4.80+4.80 3300
12.1 14.5
(640~3040) (1.50~10.60) (600~3630)
2760 4.30+5.30 3300
12.1 14.5
(640~3040) (1.50~10.60) (600~3630)
2760 4.80+4.80 3300
12.1 14.5
(640~3040) (1.50~10.60) (600~3630)
1660 2.90+2.90 1580
7.3 6.9
(640~1830) (1.50~6.40) (600~1740)
1860 2.60+3.60 1930
8.2 8.5
(640~2050) (1.50~6.80) (600~2120)
1860 2.40+3.80 1930
8.2 8.5
(640~2050) (1.50~6.80) (600~2120)
1860 3.10+3.10 1930
8.2 8.5
(640~2050) (1.50~6.80) (600~2120)
2420 3.40+3.40+3.40 2530
10.6 11.1
(650~3000) (3.00~11.20) (620~3630)
2580 3.00+3.00+4.20 2530
11.3 11.1
(650~3200) (3.00~11.20) (620~3630)
2580 2.80+2.80+4.60 2530
11.3 11.1
(650~3200) (3.00~11.20) (620~3630)
2580 2.60+2.60+5.00 2530
11.3 11.1
(650~3200) (3.00~11.20) (620~3630)
2580 2.60+3.80+3.80 2530
11.3 11.1
(650~3200) (3.00~11.20) (620~3630)
2580 2.60+3.60+4.00 2530
11.3 11.1
(650~3200) (3.00~11.20) (620~3630)
2580 2.30+3.30+4.60 2530
11.3 11.1
(650~3200) (3.00~11.20) (620~3630)
2580 2.40+3.90+3.90 2530
11.3 11.1
(650~3200) (3.00~11.20) (620~3630)
2580 2.30+3.50+4.40 2530
11.3 11.1
(650~3200) (3.00~11.20) (620~3630)
2580 3.40+3.40+3.40 2530
11.3 11.1
(650~3200) (3.00~11.20) (620~3630)
2580 3.20+3.20+3.80 2530
11.3 11.1
(650~3200) (3.00~11.20) (620~3630)
2580 3.00+3.00+4.20 2530
11.3 11.1
(650~3200) (3.00~11.20) (620~3630)
2580 3.20+3.50+3.50 2530
11.3 11.1
(650~3200) (3.00~11.20) (620~3630)
2650 2.75+2.75+2.75+2.75 2630
11.6 11.6
(650~3200) (3.00~12.40) (620~3630)
2650 2.50+2.50+2.50+3.50 2630
11.6 11.6
(650~3200) (3.00~12.40) (620~3630)
2650 2.40+2.40+2.40+3.80 2630
11.6 11.6
(650~3200) (3.00~12.40) (620~3630)
2650 2.30+2.30+3.20+3.20 2630
11.6 11.6
(650~3200) (3.00~12.40) (620~3630)