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Installation manual

9

RZQS71~125B7V3

Split System air conditioners

4PW32097-1

Procedure for leak test

Leak test must satisfy EN378-2.

1

Evacuate the pipes and check vacuum

(1)

. (No pressure increase

for 1 minute.)

2

Break the vacuum with a minimum of 2 bar of nitrogen. (Never
pressurize more than 4.0 MPa.)

3

Conduct leak test by applying soap water, etc. to the connecting
part of the pipes.

4

Discharge nitrogen.

5

Evacuate and check vacuum again

(1)

.

6

If the vacuum gauge no longer rises, the stop valves can be
opened.

C

HARGING

 

REFRIGERANT

Precaution for servicing

This unit requires additional charging of refrigerant according to the
length of pipe connected at the site. Charge the refrigerant to the
liquid pipe in its liquid state through the service port of the liquid stop
valve. Since R410A is a mixed refrigerant, its composition changes if
charged in a state of gas and normal system operation would no
longer be assured.

On this model it is not necessary to charge additionaly if the piping
length 

30 m.

<5 m: See 

"Total charging weight of the refrigerant (after a leak, etc.)"

on page 10

.

Additional charging of refrigerant

The additional charging amounts relate to the refrigerant piping
length as in 

"Maximum total one-way piping length"

 of the table

in paragraph 

"Allowable pipe length and height difference" on

page 6

(E.g. twin: L1+L2+L3).

Over 30 

m, please add refrigerant quantity according to

following table.

For future servicing, mark with a circle the selected amount on the
tables below

For pair system

Table 1: Additional charging of refrigerant <unit: kg>

For twin, triple, and double twin system

Please charge additionaly according to the following calculation.
(additional amount is R1+R2)

1.

G1: total length of 

Ø

9.5 mm liquid piping

G2: total length of 

Ø

6.4 mm liquid piping

2.a G1>30 m

calculate length over 30 m (=G1–30 m)
Based on this length decide R1, R2 in the table

G1

30 m and G1+G2>30 m

calculate total length over 

30

 m (=G1+G2–30 m)

Based on this decide R2 in the table, R1=0

3.

Total additional charge amount
R=R1+R2 (kg)

Table 2: Length <unit: m>, additional charging of refrigerant
<unit: kg>

Example 1

1

G1=L1=35 m

G2=L2+L3=7+5=12

2

Over 

30 

 m

a

G1

30=5 m

  Ø9.5 R1=0.5 kg

b

G2=12 m 

  Ø6.4 R2=0.6 kg

3

Refrigerant charge amount=R=R1+R2=0.5+0.6=1.1 kg

(1) Use a 2-stage vacuum pump with a non return valve which 

can evacuate to –100.7 kPa (5 Torr, –755 mm Hg).
Evacuate the system from the liquid and gas pipes by using 
a vacuum pump for more than 2 hours and bring the system 
to –100.7 kPa. After keeping the system under that condition 
for more than one hour, check if the vacuum gauge rises or 
not. If it rises, the system may either contain moisture inside 
or have leaks.

Following should be executed if there is a possibility of
moisture remaining in the pipe (if piping work is carried out
during the raining season or over a long period of time,
rainwater may enter the pipe during work).
After evacuating the system for 2 hours, pressurize the
system to 0.05 MPa (vacuum break) with nitrogen gas and
evacuate the system again using the vacuum pump for
1 hour to –100.7 kPa (vacuum drying). If the system
cannot be evacuated to –100.7 kPa within 2 hours, repeat
the operation of vacuum break and vacuum drying. Then
after leaving the system in vacuum for 1 hour, confirm that
the vacuum gauge does not rise.

After air purging with a vacuum pump it may happen that
the refrigerant pressure does not rise, not even if the stop
valve is opened. Reason for this phenomenon is the closed
state of for instance the expansion valve in the outdoor unit
circuit, but this is not a problem for running the unit.

When performing service on the unit requiring the
refrigerant system to be opened, refrigerant must be
evacuated according to local regulations.

Standard liquid pipe size

Connected piping length is between

Model

30~40 m

40~50 m

RZQS71

125

0.5

1.0

Liquid piping

Ø

Length exceeding 

“Chargeless length”

Model 

0~10

10~20

125

Main

9.5

0.5

1.0

R1

Branch

Branch

6.4

0.3

0.6

R2

L2=7 (Ø6.4)

50 type

100 type

L1=35 (Ø9.5)

indoor

L3=5 (Ø6.4)

50 type

outdoor heat pump

Summary of Contents for RZQS71B7V3

Page 1: ...INSTALLATION MANUAL RZQS71B7V3 RZQS100B7V3 RZQS125B7V3 Split System air conditioners...

Page 2: ...7 6 6 8 3 3 1 3 2 4 5 A B A E B C D H H1 L1 H1 H2 L3 L1 L2 H1 H2 L4 L1 L3 L2 H1 H2 L7 L1 L6 L5 L4 L3 L2 A A B2 B2 B2 C C D1 D1 D1 D2 D2 D2 D2 D2 E E H H L1 L1 L1 L2 L2 L2 A A B1 B1 B1 B1 B1 B1 B2 B2 B...

Page 3: ...u condi ia ca acestea s fie utilizate n conformitate cu instruc iunile noastre 19 skladni z naslednjimi standardi in drugimi normativi pod pogojem da se uporabljajo v skladu z na imi navodili 20 on va...

Page 4: ...on may result in water leakage electric shocks or fire Perform installation work in accordance with this installation manual Improper installation may lead to water leakage electric shocks or fire Whe...

Page 5: ...rding to national regulations Do not connect the earth wire to gas or water pipes lightning conductor or telephone earth wire Incomplete grounding may cause electric shocks Gas pipe Ignition or explos...

Page 6: ...ration of the operational capacity Frequent frost acceleration in heating operation Disruption of operation due to rise of high pressure When a strong wind blows continuously on the face of the unit t...

Page 7: ...pe disposal If drain pipe disposal from the outdoor unit causes trouble for example if the drain water may splash on people provide the drain piping using a drain socket optional Make sure the drain w...

Page 8: ...e sizes must have the same size as the connected indoor units pipe sizes Branch see marking on figures 3 4 and 5 Selection of branch pipe L A L H 0 L 1 2H 150 250 1 2H L 200 300 H L Installation impos...

Page 9: ...nch pipe to the indoor unit should be as short as possible Try to keep lengths of both branch pipes to the indoor unit equal REFRIGERANT PIPING Field pipes can be installed in four directions Figure F...

Page 10: ...r to the figure Take care not to damage it After operating the valve be sure to tighten the valve cover properly Check for refrigerant leakage after tightening the cap Cautions for handling service po...

Page 11: ...f oxidised film on the inside of the pipes adversely affecting valves and compressors in the refrigerating system and preventing normal operation When brazing pipes however do not use oxidation preven...

Page 12: ...0 m G1 G2 30 m Based on this decide R2 in the table R1 0 3 Total additional charge amount R R1 R2 kg Table 2 Length unit m additional charging of refrigerant unit kg Example 1 1 G1 L1 35 m G2 L2 L3 7...

Page 13: ...e bundled cables into a unit Fix cables so that cables do not make contact with the pipes especially on high pressure side Secure the electrical wiring with clamping material as shown in the figure be...

Page 14: ...wiring works Form the wires and fix the cover firmly so that the cover may be fit in properly Precautions on wiring of power supply and inter unit wiring Use a round crimp style terminal for connectio...

Page 15: ...pt displaying the heating symbol all the time and the unit will switch to heating operation automatically after elapse of that time 2 In case you cannot operate the unit in test run mode for any unusu...

Page 16: ...r code U4 or UF is displayed on the remote controller check the inter unit branch wiring connection The reversed phase protection detector of this product only works during the initialisation stage af...

Page 17: ...r air R2T Thermistor coil R3T Thermistor discharge pipe R4T Thermistor suction pipe R5T Thermistor power module RC Signal receiver circuit S1NPL Pressure sensor low S1PH Pressure switch high S1PL Pres...

Page 18: ...Zandvoordestraat 300 B 8400 Oostende Belgium 4PW32097 1...

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