Toshiba RBC-TWP101E User manual

Installation manual 1
English
Manuel d’installation 18
Français
R32 or R410A
EH99865801-3
AIR CONDITIONER (SPLIT TYPE)
Installation manual
Branch kit 1:2
Model name:
RBC-TWP101E

1EN
Branch Kit 1:2
NOTES
Be careful of the following items before installation
1. This Installation Manual is for the branch pipe using for double twin simultaneous
system.
2. Check the combination of indoor unit, outdoor unit and branch pipe again before
installation.
3. Be sure to install the indoor unit in the same room and to observe the application of floor
space.
Should the refrigerant leaks and exceeds the limit concentration, accumulation of highly
concentrated refrigerant occurs, cause an oxygen deficiency accident or a fire.
4. For installation for indoor or outdoor unit, please read the Installation Manual supplied
with indoor or outdoor unit.
5. Make sure to observe the cautions for each contents.
Be sure to follow the wiring or the setting procedure in the Installation Manual.
Contents
1 COMPONENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2 REFRIGERANT PIPING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3 WIRING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4 PIPING HEAT INSULATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5 TEST RUN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
6 DELIVERY TO CUSTOMER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Branch Kit 1:2
2
EN
EN
1COMPONENT
The following parts are supplied as accessories of the branch pipes. Check them when
opening the carton box.
Part Quantity Shape Use
Installation manual 5 This booklet For installation works
Branch pipe
Gas side
1 Ø25.4 mm – Ø15.9 mm, Ø15.9 mm
1Ø25.4 mm – Ø28.6 mm
(Inner diameter)
Liquid side 1 Ø12.7 mm – Ø9.5 mm, Ø9.5 mm

3EN
Branch Kit 1:2
2REFRIGERANT PIPING
Tolerance of pipe length and Height difference
<RAV-SM2244AT8, SM2804AT8 series>
* Ensure that the shortest pipe length complies with the following:
L+b≥5m
a≥b
Pipe Length
(One Direction)
Full length (L + a or L + b) Below 70 m
(actual length)
Branch piping (a, b) Below 20 m
(actual length)
Difference of branch piping length
(b–a,ora–b) Below 10 m
Height
Difference
Outdoor Unit -
Indoor Unit
(H)
Outdoor Unit Installed
Above Indoor Unit Below 30 m
Outdoor Unit Installed
Below Indoor Unit Below 30 m
Between Indoor Units (Δh) Below 0.5 m
Remarks Less than 10 bends
H
L
ab
Indoor unit B
Indoor unit A
Outdoor unit
Branch
piping
Branch
piping
Main piping

Branch Kit 1:2
4
EN
EN
<RAV-SM2246AT8, SM2806AT8 series>
* Ensure that the shortest pipe length complies with the following:
L+b≥5m
a≥b
CAUTION
When planning a layout for Units A and B, comply with the following:
1. The lengths after branching (“a” and “b”) should be equal if feasible. Install Units A and B
so that the difference of the branching lengths becomes less than 10 m if the lengths
cannot be equal due to the branch pipe position.
2. Install Units A and B on the same level. If Units A and B cannot be installed on the same
level, the difference in level should be limited to 0.5 m or less.
3. Be certain to install Units A and B in the same room. Units A and B cannot be operated
independently each other.
Pipe Length
(One Direction)
Full length (L + a or L + b) Below 100 m
(actual length)
Branch piping (a, b) Below 20 m
(actual length)
Difference of branch piping length
(b–a,ora–b) Below 10 m
Height
Difference
Outdoor Unit -
Indoor Unit
(H)
Outdoor Unit Installed
Above Indoor Unit Below 30 m
Outdoor Unit Installed
Below Indoor Unit Below 30 m
Between Indoor Units (Δh) Below 0.5 m
Remarks : Total equivalent length 125 m or less
H
L
ab
Indoor unit B
Indoor unit A
Outdoor unit
Branch
piping
Branch
piping
Main piping

5EN
Branch Kit 1:2
<RAV-GM224*AT8, GM280*AT8 series>
* Ensure that the shortest pipe length complies with the following:
L+b≥5m
a≥b
*1: Full length of the following model is 60 m.
RAV-GM2241AT8(J)-E, RAV-GM2241AT8(J)-TR,
RAV-GM2801AT8(J)-E, RAV-GM2801AT8(J)-TR
CAUTION
When planning a layout for Units A and B, comply with the following:
1. The lengths after branching (“a” and “b”) should be equal if feasible. Install Units A and B
so that the difference of the branching lengths becomes less than 10 m if the lengths
cannot be equal due to the branch pipe position.
2. Install Units A and B on the same level. If Units A and B cannot be installed on the same
level, the difference in level should be limited to 0.5 m or less.
3. Be certain to install Units A and B in the same room. Units A and B cannot be operated
independently each other.
Pipe Length
(One Direction)
Full length (L + a or L + b) Below 100*1m
(actual length)
Branch piping (a, b) Below 20 m
(actual length)
Difference of branch piping length
(b–a,ora–b) Below 10 m
Height
Difference
Outdoor Unit -
Indoor Unit
(H)
Outdoor Unit Installed
Above Indoor Unit Below 30 m
Outdoor Unit Installed
Below Indoor Unit Below 30 m
Between Indoor Units (Δh) Below 0.5 m
H
L
ab
Indoor unit B
Indoor unit A
Outdoor unit
Branch
piping
Branch
piping
Main piping

Branch Kit 1:2
6
EN
EN
Piping materials and sizes
Use general copper pipes with a wall thickness of 0.8 mm for Ø6.4 mm, Ø9.5 mm, and
Ø12.7 mm, with a wall thickness of 1.0 mm for Ø15.9 mm, with a wall thickness of 1.2 mm
for Ø19.1 mm, and with a wall thickness of 1.0 mm for Ø28.6 mm (half hard).
Do not use any copper pipes with a wall thickness less than these thicknesses.
In parentheses ( ) are wall thickness
Branch pipe
Now the refrigerant pipe is installed using branch pipes supplied as accessories.
• Bend and adjust the refrigerant piping so that the branch pipes and pipe after branching
become horizontal.
• Fix the branch pipes onto a wall in a ceiling or onto a column.
• Provide a straight pipe longer than 500 mm in length as the main piping of the branches.
Air Purging
For the complete information, read the installation manual for outdoor units of air
conditioner.
Branch pipe
Pipe side
Gas side Main piping Ø28.6 (half hard 1.0)
Branch piping Ø15.9 (1.0)
Liquid side Main piping Ø12.7 (0.8)
Branch piping Ø9.5 (0.8)
Horizontal
Inclination
500 mm or
more
Horizontal
Inclination
Correct Correct
IncorrectIncorrect

7EN
Branch Kit 1:2
Additional Refrigerant Amount
<RAV-SM2244AT8, SM2804AT8 series>
Formula for Calculating Additional Refrigerant Amount
Do not remove the refrigerant even if the additional refrigerant amount becomes minus
result as a result of calculations by the following formula and operate the air conditioner as it
is.
A: Additional refrigerant amount per meter of actual main piping length (kg)
B: Additional refrigerant amount per meter of actual branch piping length (kg)
L: Actual length of main piping (m)
a, b: Actual length of branch piping (m)
Additional refrigerant amount (kg) = Main piping additional refrigerant amount (kg) +
Branch piping additional refrigerant amount (kg)
= A × (L – 28) + B × (a + b – 4)
Standard piping length Additional refrigerant
amount per Meter (kg/m)
Main piping Branch piping A B
SM224
SM280 28 m 2 m 0.080 0.040
a
L
b
Indoor unit B
Indoor unit A
Outdoor unit
Branch
piping
Branch
piping
Main piping

Branch Kit 1:2
8
EN
EN
<RAV-SM2246AT8, SM2806AT8 series>
Formula for Calculating Additional Refrigerant Amount
Do not remove the refrigerant even if the additional refrigerant amount becomes minus
result as a result of calculations by the following formula and operate the air conditioner as it
is.
A: Additional refrigerant amount per meter of actual main piping length (kg)
B: Additional refrigerant amount per meter of actual branch piping length (kg)
L: Actual length of main piping (m)
a, b: Actual length of branch piping (m)
CAUTION
1. Be certain to write the additional refrigerant amount, pipe length (actual length), head
and other specification on the nameplate put on the outdoor unit for recording.
2. Seal the correct amount of additional refrigerant in the system.
Additional refrigerant amount (kg) = Main piping additional refrigerant amount (kg) +
Branch piping additional refrigerant amount (kg)
= A × (L – 28) + B × (a + b – 4)
Standard piping length Additional refrigerant
amount per Meter (kg/m)
Main piping Branch piping A B
SM224
SM280 28 m 2 m 0.090 0.045
a
L
b
Indoor unit B
Indoor unit A
Outdoor unit
Branch
piping
Branch
piping
Main piping

9EN
Branch Kit 1:2
<RAV-GM224*AT8, GM280*AT8 series>
Formula for Calculating Additional Refrigerant Amount
Do not remove the refrigerant even if the additional refrigerant amount becomes minus
result as a result of calculations by the following formula and operate the air conditioner as it
is.
A: Additional refrigerant amount per meter of actual main piping length (kg)
B: Additional refrigerant amount per meter of actual branch piping length (kg)
L: Actual length of main piping (m)
a, b: Actual length of branch piping (m)
CAUTION
1. Be certain to write the additional refrigerant amount, pipe length (actual length), head
and other specification on the nameplate put on the outdoor unit for recording.
2. Seal the correct amount of additional refrigerant in the system.
Additional refrigerant amount (kg) = Main piping additional refrigerant amount (kg) +
Branch piping additional refrigerant amount (kg)
= A × (L – 28) + B × (a + b – 4)
Standard piping length Additional refrigerant
amount per Meter (kg/m)
Main piping Branch piping A B
GM224
GM280 28 m 2 m 0.080 0.040
a
L
b
Indoor unit B
Indoor unit A
Outdoor unit
Branch
piping
Branch
piping
Main piping