Toshiba R410A User manual

Q ui c k referen c e
SHRM
File No. A13-004
SUPER HEAT RECOVERY MULTI (UL Model)
R410A

01
La Lb
(b)
(a)
L1
L3
L2
fgh
cab
kl
L8
ij (m)
on
(o)
(n)
dem
L4
L5 L6 L7
Outdoor Unit
Header unit (A) Follower unit (B)
Height difference
between outdoor units
H3 ≤0.3 ft (0.1 m)
Outdoor unit connecting pipes
Main
piping
Height
difference
between
outdoor
and indoor
units:
H1 ≤165 ft
(50 m)
First branching
section
FS unit
Branching pipe Branching header
Indoor unit connecting pipe
Indoor unit
Y-shape branching joint
The longest piping length: L ≤640 ft (195 m)
The longest piping length from the first branch: Li ≤215 ft (65 m)
Max. equivalent piping length in group of the FS unit: Ln ≤98 ft (30 m)
Y-joint
FS unit
Indoor unit
Height difference
between indoor units:
H2 ≤130 ft
(40 m)
Height difference
between indoor units
in same FS unit
H4 ≤1.6 ft
(0.5 m)
Allowable length of refrigerant pipes and allowable height difference between units
Refrigerant Piping
System restriction
Max. No. of combined outdoor units 2 units
Max. capacity of combined outdoor units 20 ton
Max. No. of connected indoor units 40 units
Max. capacity of combined indoor units H2 ≤49 ft (15 m) 125 %
H2 > 49 ft (15 m) 105 %

02
Pipe length
Height
difference
985 (300)Actual lengthTotal extension of pipe (liquid pipe) La + Lb + L1 + L2 + L3 + L4 + L5 + L6 + L7
+ a + b + c + d + e + f + g + h + i + j
295 (90) (*2)
Farthest equivalent piping length from the first
branch Li (*1) L3 + L4 + L5 + L6 + j
720 (220) Equivalent length
Farthest piping length L (*1) Lb + L1 + L3 + L4 + L5 + L6 + j
230 (70) (*3)
Upper outdoor
units
Height between outdoor and indoor
units H1
—
130 (40) (*4)
Lower outdoor
units —
130 (40)Height between indoor units H2 —
16 (5)Height between outdoor units H3 —
590 (180)Actual length
395 (120) Equivalent length
Main piping length L1
330 (100)Actual length
33 (10)
Maximum equivalent piping length of pipes
connected to outdoor units La, Lb
98 (30)
Maximum actual length of pipes connected to
indoor units a, b, c, d, e, f, g, h, i, j
165 (50)
Maximum equivalent length between branching
sections L2, L3, L4, L5, L6, L7
Item Allowable
value (ft (m)) Pipes
Cautions for installation
• The header unit is connected to main piping to indoor units.
• The header unit is the one with the highest capacity code. A (header unit) ≥B
• To connect gas pipes to indoor units, use Y-shaped branching joints to keep pipes level.
• When Outdoor unit connection piping kits is used to pipe to outdoor units, intersect the pipes to the outdoor unit
and those to indoor units.
Allowable length and allowable height difference of refrigerant piping
*1: Farthest outdoor unit from the first branch: (B), farthest indoor unit: (j)
*2: Make the difference 215 ft (65 m) or less if the height difference between outdoor and indoor units (H1) is more than 10 ft (3 m).
*3: Make the difference 165 ft (50 m) or less if the height difference between indoor units (H2) is more than 10 ft (3 m).
*4: Make the difference 98 ft (30 m) or less if the height difference between indoor units (H2) is more than 10 ft (3 m).

03
AB
(1) (4)
(1)
(9)
(4)
(7)
(4)
(4)
(4) (*2)
(5)(5)
(6) (6)
(4) (4) (*2) (7)
(4)
(6) (6) (6)
(5)(5)
(4) (4)
(4) (*2) (7) (7)
(7)
(Header unit) (Follower unit)
Outdoor unit
(2) Balance pipe
Ø3/8"
Liquid pipe
Discharge
gas pipe
Suction
gas pipe
(3) Main piping
First branch section
FS unit
Indoor unit (*7) <Group control>
In case of two or more indoor units are connected
with FS unit
(8) Branching header
(7) Y-shaped branching joint
<Cooling only> <Cooling only>
Table 1
Indoor unit
capacity type
Outdoor unit
capacity type
Maximum number of indoor units
Outdoor
capacity code
(Equivalent
to capacity)
If “Medium Static Ducted Type
(MMD-AP***BH)”
is excluded in the system
If “Medium Static Ducted Type
(MMD-AP***BH)”
is included in the system
007 type
009 type
012 type
015 type
018 type
021 type
024 type
027 type
030 type
036 type
042 type
048 type
054 type
072 type
096 type
Indoor capacity code
(Equivalent to capacity)
7.5
9.6
12
15.4
18
21
24
27
30
36
42
48
54
72
96
10
13
16
20
23
26
30
33
11
15
19
23
26
30
34
38
10
13
16
20
23
26
30
33
12
16
20
24
28
32
36
40
72
96
120
144
168
192
216
240
072 type
096 type
120 type
144 type
168 type
192 type
216 type
240 type
Height difference between
indoor units
Height difference between
indoor units
Table 2
49ft(15m) or
less
Over 49ft
(15m)
49ft(15m) or
less
Over 49ft
(15m)
* For combination of the outdoor units, refer to “Combination of outdoor units”.
Refrigerant Piping (Continued)
Selection of pipe size
Capacity code of indoor and outdoor units
Selection of pipe material
• For the indoor unit, the capacity code is decided at each capacity type. (Table 1)
• The capacity codes of the outdoor units are decided at each capacity type. The maximum number of connectable
indoor units and the total value of capacity codes of the indoor units are also decided. (Table 2)
NOTE
Compared with the capacity code of the outdoor unit, the total value of capacity codes of the connectable indoor
units differs based on the height difference between the indoor units.
When the height difference between the indoor units is 49ft (15m) or less
If “Medium Static Ducted Type (MMD-AP***BH)” is excluded in the system: Total indoor capacity code is between
80% and 125% of the capacity of the outdoor unit.
If “Medium Static Ducted Type (MMD-AP***BH)” is included in the system: Total indoor capacity code is between
80% and 120% of the capacity of the outdoor unit.
When the height difference between the indoor units is over 49ft (15m)
Total indoor unit capacity code (Equivalent to Capacity) is between 80% and 105% of the capacity of the outdoor unit.

04
Selection of pipe size
<144 to 240 type>
Outdoor unit
↓
Outdoor unit
connection piping kit
Outdoor unit
connecting pipe
Model
072 type
096 type
120 type
Balance pipe side
Ø3/8"
Ø3/8"
Ø3/8"
Suction gas side
Ø7/8"
Ø7/8"
Ø1-1/8"
Discharge gas side
Ø3/4"
Ø3/4"
Ø3/4"
Liquid side
Ø1/2"
Ø1/2"
Ø1/2"
No.
(1)
Title Use part Selection of pipe size
Outdoor unit
connection piping Balance pipe Outdoor unit capacity type
144 to 240 type
Balance pipe
Ø3/8"
(2)
Flow Selector unit
↓
Indoor unit
Indoor unit
connecting pipe
Indoor unit capacity type
007 to 012 type
015 to 018 type
021 to 048 type
Gas side
Ø3/8"
Ø1/2"
Ø5/8"
Liquid side
Ø1/4"
Ø1/4"
Ø3/8"
(5)
<072 to 120 type>
Outdoor unit
↓
First branching section
<144 to 240 type>
Outdoor unit
connection piping
kit of header unit
↓
First branching section
Main piping
Outdoor unit capacity type (kBtu)
072, 096 type
120 type
144 type
168, 192 type
216, 240 type
Suction gas side
Ø7/8"
Ø1-1/8"
Ø1-1/8"
Ø1-1/8"
Ø1-3/8"
Discharge gas side
Ø3/4"
Ø3/4"
Ø7/8"
Ø7/8"
Ø1-1/8"
Liquid side
Ø1/2"
Ø1/2"
Ø5/8"
Ø3/4"
Ø3/4"
(3)
Ø3/8"
Ø1/2"
Ø5/8"
Ø3/4"
Ø3/4"
Ø1/2"
Ø3/4"
Ø7/8"
Ø7/8"
Ø1-1/8"
Ø5/8"
Ø7/8"
Ø1-1/8"
Ø1-1/8"
Ø1-3/8"
Below 61
61 to below 116
116 to below 155
155 to below 193
193 or more
Branching section
↓
Branching section
Branching section
↓
Flow Selector unit
Flow Selector unit
↓
Branching section
Branching pipe
(*1)(*2)(*6)
Total capacity codes of indoor units
at downstream side (kBtu/h) (*6) Suction gas side Discharge gas side Liquid side
(4)
Branching section
Y-shaped
branching joint
(*3)(*4)
Total capacity codes of indoor units (kBtu/h) Model name
(7)
For 3 pipes
RBM-BY55FUL
RBM-BY105FUL
RBM-BY205FUL
For 2 pipes
RBM-BY55UL
RBM-BY105UL
RBM-BY205UL
Below 61
61 to below 136
136 or more
Terminal
branching section
↓
Indoor unit
Indoor unit
connecting pipe
Indoor unit capacity type Gas side
Ø3/8"
Ø1/2"
Ø1/2"
Ø5/8"
Ø5/8"
Liquid side
Ø1/4"
Ø3/8"
Ø1/4"
Ø3/8"
Ø3/8"
(6)
007 to 012 type Pipe length
(Actual length)
015 to 018 type
021 to 048 type
Pipe length
(Actual length)
49 ft or less
Over 49 ft
49 ft or less
Over 49 ft
Branching section
Branching
header
(*3)(*4)(*5)
Total capacity codes of indoor units (kBtu/h) Model name
(8)
For 2 pipes
RBM-HY1043UL
RBM-HY2043UL
RBM-HY1083UL
RBM-HY2083UL
For 3 pipes
RBM-HY1043FUL
RBM-HY2043FUL
RBM-HY1083FUL
RBM-HY2083FUL
For 4 branching
For 8 branching
Below 136
136 or more
Below 136
136 or more
Below 38
38 to below 61
61 to 96 or less
5
8
8
RBM-Y0383FUL
RBM-Y0613FUL
RBM-Y0963FUL
Branching section
Outdoor unit
connection
piping kit
*1: Use the same size as the main pipe if it is larger than the main pipe.
*2: Use a suction gas pipe and a liquid pipe for the two pipes branching downstream from the flow selector unit and the dedicated cooling circuit.
*3: Select the branch pipe of the first branch according to the outdoor capacity code.
*4: Select according to the outdoor unit capacity code if the total of the indoor capacity codes exceeds the outdoor unit capacity code.
*5: Up to a total of 54 (kBtu/h) maximum capacity code is connectable to one line after branching header.
When using a branching header for the 1st branch and the total capacity codes of all outdoor units are 120 type or more, use a
RBM-HY2043FUL or RBM-HY2083FUL regardless of the total capacity codes of indoor units at downstream side.
*6: The downstream starting point is the main pipe.
*7: Only group operation with one remote control (or two remote controls) is possible if one flow selector unit is connected to multiple indoor units.
Multiple outdoor units
(9) Model name
RBM-BT14FUL
Flow Selector
unit (*7)
Total capacity codes of indoor units (kBtu/h) Model name
(10)
Max. number of
connectable indoor units

05 Refrigerant Piping (Continued)
FS unit (Flow Selector unit)
Specifications
Model Name RBM-Y0383FUL RBM-Y0613FUL RBM-Y0963FUL
Power supply 230 V (208/230 V) 1phase 60 Hz
Connectable indoor unit capacity (kBtu/h) Below 38 38 to below 61 61 to 96 or less
Connectable indoor units 588
Height (in) 7.49 7.49 7.88
Width (in)Dimension 9.77 9.77 15.8
Depth (in) 6.3 6.3 7.88
Total Weight (lbs) 11 13 20
Liquid side (in)Connecting port dia.
(Indoor unit side)
3/8" 3/8" 1/2"
Gas side (in) 5/8" 5/8" 7/8"
Liquid side (in)
Connecting port dia.
(Outdoor unit side)
3/8" 3/8" 1/2"
Discharge gas side (in) 1/2" 1/2" 1/4"
Gas side (in) 5/8" 5/8" 7/8"
Connection Blaze connection
RBM-Y0383FUL, RBM-Y0613FUL
RBM-Y0963FUL
Ground Screw Attached wire (Power supply)
RBM-Y0613FUL Only
Attached wire (Control wiring)
Control P.C Board
1
13
131
W iring Diagram
MCC-1431
3
3
1
1
2
2
4
4
5
5
753
53 7
9
9
4321 5
21 3 45
R(L) S(N)
3
1
3
1
Power supply
single phase
208/230 V, 60 Hz
Indoor unit
ground screw
Outdoor unit side Indoor unit side
Indoor unit
CN81
(BLK)
SVSS
SVD
WHI
COM SVS
SVS SVS
SVSSSVDD
SVDD
CN67
(BLK)
SVD
ORN
BLU YEL BRW
Control P.C Board
for indoor unit
CN01
(RED)
CN02(GRN)
CN10(WHI)
Ground Screw Attached wire (Power supply)
Attached wire (Control wiring)
1
13
131
W iring Diagram
3
3
1
1
2
2
4
4
5
5
753
53 7
9
9
4321 5
21 3 45
3
1
3
1
SVSS
SVD
WHI
COM SVS
SVS SVS
SVSSSVDD
SVDD
SVD
ORN BLU YEL BRW
SVD
SVS
Power supply
single phase
208/230 V, 60 Hz
Indoor unit
ground screw
Outdoor unit side Indoor unit side
Indoor unit
Control P.C Board
for indoor unit
Control P.C Board
MCC-1431
CN01
(RED)
CN02(GRN)
CN10(WHI)
R(L) S(N)
CN81
(BLK)
CN67
(BLK)
Refrigerant pipe connecting port (Liquid)
6.06" (154)
9.77" (248)
Refrigerant pipe connecting port (Gas)
12.6" (320) (Hanging bolt pitch)
Refrigerant pipe connecting port (Discharge gas)
Refrigerant pipe connecting port (Liquid)
Refrigerant pipe connecting port (Suction gas)
(4.73" (120))
(4.73" (120))
(4.73" (120))
1.54" (39) 2.24" (57)
7.49" (190)
3.43" (87)
1.73" (44)
0.83" (21)
1.34" (34)
2.95" (75)
2.13" (54)
5.39" (137)
0.83" (21)
Ø0.87" (22.2)
Knockout hole for power wiring
Ø0.79" (20)
Hole for control wiring
3.11" (79)
1.22" (31)
6.3" (160)
Refrigerant pipe connecting port (Liquid)
6.26" (159)
15.8" (400)
Refrigerant pipe connecting port (Gas)
18.5" (470)
Refrigerant pipe connecting port
(Discharge gas)
Refrigerant pipe connecting port (Liquid)
Refrigerant pipe connecting port
(Suction gas)
(4.73" (120)) (4.73" (120))
1.93" (49)
2.68" (68)
7.88" (200)
3.7" (94)
2.20" (56)
1.10" (28)
1.34" (34)
6.93" (176)
3.70" (94)
0.91" (23)
Ø0.87" (22.2)
Knockout hole for power wiring
Ø0.79" (20)
Hole for control wiring
4.29" (109)
3.03" (77)
7.88" (200)
2.64" (67)
External view
(Unit: in (mm))

Adding refrigerant 06
After finishing vacuuming, exchange the vacuum pump with a refrigerant canister and start additional charging of
refrigerant.
Calculation of additional refrigerant charge amount
Refrigerant charge amount at shipment from the factory does not include the refrigerant for pipes at the local site.
For refrigerant to be charged in pipes at the local site, calculate the amount and charge it additionally.
NOTE
If the additional refrigerant amount indicates minus as the result of calculation, use the air conditioner without
additional refrigerant.
After finishing vacuuming, exchange the vacuum pump with a refrigerant canister and start additional charging of
refrigerant.
Calculation of additional refrigerant charge amount
Additional charge amount (lbs) = { (Lx × 0.017 lbs/ft)+(Ly × 0.037 lbs/ft)+(Lz × 0.071 lbs/ft) } × 1.3+ 27.5 (lbs)
= { ((a2+d2) × 0.017 lbs)+((L3+a1+b1+c1+d1+b2+c2) × 0.037 lbs)+(L1+L2) × 0.071 lbs } × 1.3+27.5 (lbs)
= { (30 × 0.017 lbs)+(150 × 0.037 lbs)+(135 × 0.071 lbs) } × 1.3+27.5 (lbs)
= 47.84 lbs
Lx : Actual total length of liquid pipe Ø1/4” (ft)
Ly : Actual total length of liquid pipe Ø3/8” (ft)
Lz : Actual total length of liquid pipe Ø1/2” (ft)
Selection of installation place
• The cooling performance may decline considerably when total operating capacity of cooling indoor units is less
than 38 kBtu/h while ambient temperature is below 32°F (0°C).
L2 L3
a2 b2 c2 d2
L1
d1
a1 b2 c1 FS unit
Additional refrigerant charge
amount
Liquid pipe outer dia.
Additional refrigerant amount/1ft (lbs)
Ø1/4”
0.017
Outdoor unit capacity type
072 type
096 type
120 type
144 type
168 type
192 type
216 type
240 type
L1 Ø1/2": 90ft L2 Ø1/2": 45ft L3 Ø3/8":30ft
5.5
20.9
27.5
5.5
23.1
30.8
34.1
37.4
072 type
096 type
120 type
072 type
096 type
096 type
120 type
120 type
—
—
—
072 type
072 type
096 type
096 type
120 type
Adjustment amount of refrigerant
(lbs) Combined outdoor units
Ø3/8”
0.037
Ø1/2”
0.071
Ø5/8”
0.108
Ø3/4”
0.168
Actual length of liquid
pipe
(lbs) =××1.3 +
Additional refrigerant charge
amount per liquid pipe 1ft
[Table 3]
Adjustment amount of
refrigerant
[Table 4]
Table 1
Table 2
Example:
(120 type)
a1 Ø1/4": 30ft b1 Ø3/8": 30ft c1 Ø1/4": 15ft d1 Ø1/4": 15ft
a2 Ø1/4": 15ft b2 Ø3/8": 15ft c2 Ø1/4": 15ft d2 Ø1/4": 15ft

07
SV
Fan
Fan motor
FM
(TO)
Right side
Main
heat exchanger
Main
heat exchanger
Right side sub heat exchanger
Left side sub heat exchanger
Left side
PMV 4
(TE 1)
PMV 2
PMV 1
(TE 2)
SV
(SV 11)
(SV 5)
(TL)
(SV 6) Check joint(High pressure)
High pressure sensor
(SV 2)
Accumulator
(SV 3D)
Oil separator
Liquid tank
Fusible
plug
FP
FP
(SV 14)
(TK 1)
(SV 3E) (TK 5)
Oil header
(SV 3A)
Solenoid
valve
Capillary
tube
Check
valve Check
joint
Tempe.
sensor Distributor
Strainer
Balance
pipe
service
valve
Suction
gas side
service
valve
Dischage
gas side
service
valve
Liquid
side
service
valve
Check joint
(Liquid pipe)
(SV 3B)
(TK 2)
(SV 41)
(TD 1)
(SV 3C)
(TK 4)
Comp.
1
Comp.
2
High
pressure
SW
High
pressure
SW
(SV 42)
(TD 2)
(Inverter)
(Inverter)
(TS 2)
(TS 1) Low
pressure
sensor
Check
joint
(Low
pressure)
4-way
valve
Symbol
SV
SV
SV
SV
SV
SV
SV
SV
SV
SV
SV
Refrigerant Piping Systematic Drawing
Model: MMY-MAP0724FT∗UL

08
Model: MMY-MAP0964FT∗UL, MMY-MAP1204FT∗UL
Fan
Fan motor
FM
(TO)
Right side
Main
heat exchanger
Main
heat exchanger
Right side sub heat exchanger
Left side sub heat exchanger
Left side
PMV 4
(TE 1)
PMV 2
PMV 1
(TE 2)
SV
SV
SV
SV
SV
SV SV
SV
SV
SV
SV
SV
SV
SV
SV
SV
(SV 11)
(SV 6)
(SV 5)
(TL)
FP
High pressure sensor
Check joint
( High pressure)
(SV 2)
Accumulator
(SV 3D)
Oil separator
Liquid
tank
Fusible
plug
(SV 14)
(TK 1) (TK 2) (TK 3)
(SV 3E) (TK 5)
Oil header
(SV 3A)
Solenoid
valve Capillary
tube Check valve Check
joint Tempe.
sensor Distributor
Strainer
Balance
pipe
service
valve
Suction
gas side
service
valve
Dischage
gas side
service
valve
Liquid
side
service
valve
(Liquid pipe)
(SV 3B)
(SV 3F)
(SV 41)
(TD 1)
(SV 3C)
(TK 4)
Comp.
1Comp.
2
High
pressure
SW
High
pressure
SW
High
pressure
SW
(SV 42)
(SV 43)
(TD 2) (TD 3)
(Inverter)
Comp.
3
(Inverter)
(Inverter)
(TS 2)
(TS 1) Low
pressure
sensor
Check
joint
(Low
pressure)
4-way
valve
Symbol
Check joint
SV
FP

Explanation of Functional Parts
09
Functional part name Functional outline
Solenoid valve
SV3A (Connector CN321: White)
1) Supplies oil reserved in the oil header during ON time.
SV3B (Connector CN321: White)
1) Returns oil supplied in the balance pipe to the compressor.
SV3C (Connector CN321: White)
1) Pressurizes oil reserved in the oil header during ON time.
SV3E (Connector CN322: White)
1) Turns on during operation and balances oil between compressors.
TS1 (Connector CN505: White)
1) Controls PMV1, 2 super heat in single heating / collective heating
TS2
(Connector CN506: Black)
1) Controls indoor oil recovery at single cooling, collective cooling operation
2) Detects overheat of the cycle
TE2 (Connector CN521: Red)
1) Controls flow volume of the auxiliary heat exchanger at collective operation
(Compressor 1 Connector CN331: White, Compressor 2 Connector CN332: Blue, Compressor 3 Connector CN333: Black)
1) Prevents liquid accumulation to compressor
Compressor
case heater
(Connector CN334: Red)
1) Prevents liquid accumulation to accumulator
1) Oil balancing in each outdoor unitBalance pipe
Accumulator
case heater
TL (Connector CN523: White)
1) Detects under cool at single operation / collective cooling operation
TO (Connector CN507: Yellow)
1) Detects outside temperature
Oil separator
Temp. Sensor
Pressure sensor
Heater
1) Prevention for rapid decreasing of oil (Decreases oil flowing to the cycle)
2) Reserve function of surplus oil
SV5
(Connector CN314: White)
1) Gas balance function at defrost operation when the number of heating indoor units increased/decreased
2) Gas recovery function in the discharge gas pipes when the single cooling operation
SV6
(Connector CN315: White)
1) Liquid bypass function for discharge temperature release (cooling bypass function)
2) Refrigerant recovery function from the stopped follower unit
SV3F (Connector CN323: White)
1) Controls oil level balances between compressors.
SV11 (Connector CN319: White)
To block discharge gas pipe (At single cooling or defrost operation)
SV14 (Connector CN336: Yellow)
1) To block the liquid line
SV2
(Connector CN311: White) Hot gas bypass
1) Low pressure release function
2) High pressure release function
3) Gas balance function during stop time
High pressure
sensor
(Connector CN501: Red)
1) Detects high pressure and controls compressor capacity
2) Detects high pressure at single operation / collective cooling operation, and controls the fan in low ambient cooling operation
3) Detects under cool in indoor unit at single operation / collective heating operation
4) Controls rps of outdoor fan at collective cooling operation
SV41
SV42
SV43
(SV41 Connector CN312: Blue, SV42 Connector CN312: Blue, SV43 Connector CN313: Red)
Start compensation valve of compressor
1) For gas balance start
2) High pressure release function
3) Low pressure release function
PMV1, 2
(Connector CN300, 301: White)
1) Super heat control function at single heating, collective heating operation
2) Under cool control function in single cooling operation
SV3D
(Connector CN322: White)
1) Reserves oil in the oil separator during OFF time.
2) Returns oil reserved in the oil separator to the compressor during ON time.
PMV4
(Connector CN303: Red)
1) Controls flow volume of the auxiliary heat exchanger at collective operation
2) Preventive function for high-pressure rising in single heating operation
TE1
(Connector CN520: Green)
1) Controls defrost in single / collective heating operation
2) Controls outdoor fan in single / collective heating operation
(TD1 Connector CN502: White, TD2 Connector CN503: Pink, TD3 Connector CN504: Blue)
1) Protection of compressor discharge temp.
TD1,TD2,TD3
(TK1 Connector CN531: Black, TK2 Connector CN532: Green, TK3 Connector CN533: Red, TK4 Connector CN534: Yellow,
TK5 Connector CN535: Red)
1) Judges oil level of the compressor
TK1, TK2
TK3, TK4
TK5
(Connector CN500: White)
1) Detects low pressure at single / collective cooling operation and controls compressor capacity
2) Detects low pressure at single / collective heating operation, and controls the super heat
Low pressure
sensor
4-way valve
Pulse motor
valve
(Connector CN317:Blue)
1) Cooling/heating exchange
2) Reverse defrost
3) Exchange of main heat exchanger with auxiliary heat exchanger
Refrigerant Piping Systematic Drawing
(Continued)