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Installation manual

9

RZQ71~125B7V3B

Split System air conditioners

4PW16864-1A

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. Since R-410A 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 5

(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

Example 2

1

G1=L1=5 m

G2=L2+L3+L4=17+17+20=54

2

Over 

30 

m

a

G1=5 m

  R1=0.0 kg

b

(G1+G2)

30=(5+54)

30=29 

 Ø6.4 R2=0.9 kg

3

Refrigerant charge amount=R=R1+R2=0.0+0.9=0.9 kg

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.

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

50~60 m

60~75 m

RZQ71

0.5

1.0

125

1.5

2.0

Size up liquid pipe size

Connected piping length is between

Model

15~20 m

20~25 m

25~30 m

30~35 m

RZQ71

0.5

1.0

125

1.5

2.0

Liquid 
piping

Ø

Length exceeding “Chargeless length”

Model 

0~10

10~20

20~30

30~40

40~55

RZQ71~125

Main

9.5

0.5

1.0

1.5

2.0

2.5

R1

Branch

Branch

6.4

0.3

0.6

0.9

1.2

1.5

R2

L2=7 (Ø6.4)

50 type

100 type

L1=35 (Ø9.5)

indoor

L3=5 (Ø6.4)

50 type

outdoor heat pump

L2=17 (Ø6.4)

50 type

indoor

125 type

L1=5 (Ø9.5)

L3=17 (Ø6.4)

50 type

outdoor heat pump

indoor

L4=20 (Ø6.4)

50 type

In case of complete recharge of the refrigerant, please first
execute vacuuming. Execute this vacuuming from the
service port. Do not use the port of the stop valve for
vacuuming. Vacuuming can not be executed completely
using such port.

Position of service port:

Heat pump: Heat pump units have 2 ports on the
piping. One between the liquid receiver and the
electronic expansion valve and another one between
the heat exchanger and the 4-way valve.

Summary of Contents for RZQ71B7V3B

Page 1: ...INSTALLATION MANUAL RZQ71B7V3B RZQ100B7V3B RZQ125B7V3B Split System air conditioners...

Page 2: ...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 B2 C...

Page 3: ...ni z naslednjimi standardi in drugimi normativi pod pogojem da se uporabljajo v skladu z na imi navodili 20 on vastavuses j rgmis t e standardi te ga v i teiste normatiivsete dokumentidega kui neid ka...

Page 4: ...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 When a...

Page 5: ...ete grounding may cause electric shocks Gas pipe Ignition or explosion may occur if the gas leaks Water pipe Hard vinyl tubes are not effective grounds Lightning conductor or telephone ground wire Ele...

Page 6: ...inage of the unit is not easy please build up the unit on a foundation of concrete blocks etc the height of the foundation should be maximum 150 mm 5 If you install the unit on a frame please install...

Page 7: ...he table below REFRIGERANT PIPE SIZE AND ALLOWABLE PIPE LENGTH Suction side obstacle Obstacle is present Discharge side obstacle 1 In these cases close the bottom of the installation frame to prevent...

Page 8: ...0 15 9 O 1 19 1 1 2H 1 Refrigerant pipe size In case of twin triple and double twin applications the listed refrigerant pipe sizes relate to the main pipes only L1 the pipes between the outdoor unit a...

Page 9: ...s through walls In case of simultaneous operating system Upward and downward piping should be performed at the main piping line Use branch piping kit optional for branching refrigerant pipes Precautio...

Page 10: ...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 port After the wor...

Page 11: ...the air with refrigerants Use a vacuum pump to vacuum the installation No additional refrigerant is provided for air purging Pipes inside the units were checked for leaks by the manufacturer The refr...

Page 12: ...1 0 5 kg b G2 12 m 6 4 R2 0 6 kg 3 Refrigerant charge amount R R1 R2 0 5 0 6 1 1 kg Example 2 1 G1 L1 5 m G2 L2 L3 L4 17 17 20 54 2 Over 30 m a G1 5 m R1 0 0 kg b G1 G2 30 5 54 30 29 6 4 R2 0 9 kg 3 R...

Page 13: ...may cause capacitor abnormal heating accident due to high frequency waves Therefore never install a phase advancing capacitor Secure the wiring in the order shown below 1 Secure the ground wire to th...

Page 14: ...ning torques for the terminal screws Refer to the installation manual attached to the indoor unit for wiring of indoor units etc Attach an earth leak detector and fuse to the power supply line See fig...

Page 15: ...is not starting and stopping during the test run by listening If it is starting and stopping immediately stop the machine using the remote control and check the refrigerant level etc There may be som...

Page 16: ...r 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 TC Signal tra...

Page 17: ...NOTES NOTES...

Page 18: ...Zandvoordestraat 300 B 8400 Oostende Belgium 4PWEN16864 1A...

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