Toyotomi MUL12- FWCA User manual

Service Manual
MODEL:
MUL FWCA Series

CONTENTS
PRODUCT ..................................................................................................................
1 MODELS LIST .......................................................................................................................
1.1 Outdoor Unit .................................................................................................................................................
1.2 Indoor Unit....................................................................................................................................................
2 NOMENCLATURE ...............................................................................................................
2.1 Nomenclature of Outdoor Unit ....................................................................................................................
2.2 Nomenclature of indoor unit .......................................................................................................................
3 FUNCTION .............................................................................................................................
4 PRODUCT DATA ..................................................................................................................
4.1 Product data of outdoor............................................................................................................................
4.2 Product data of indoor.................................................................................................................................
4.3 Working Temperature Range.....................................................................................................................
5 PIPING DIAGRAM ..............................................................................................................
CONTROL ................................................................................................................
1 OPERATION FLOWCHART ...............................................................................................
1.1 Cooling/Dehumidfying Operation ..............................................................................................................
1.2 Heating Operation......................................................................................................................................
2 MAIN LOGIC........................................................................................................................
2.1 Control Function of Outdoor Unit............................................................................................................
2.2 Protection Function .....................................................................................................................................
2.3 Control Function of Indoor Unit.................................................................................................................
3 REMOTE CONTROLLER ...................................................................................................
3.1 Wired Remote Controller ...........................................................................................................................
3.2 Wireless Remote Controller........................................................................................................................
INSTALLATION ......................................................................................................
1 PRECAUTIONS FOR INSTALLATION ...........................................................................
1.1 Precautions for Installation ........................................................................................................................
1.2 Key Points of Installation ............................................................................................................................
2 FLOW CHART OF INSTALLATION.................................................................................
3 OUTDOOR UNIT INSTALLATION...................................................................................
3.1 Before Installation ........................................................................................................................................
3.2 Installation Site.............................................................................................................................................
3.3 Caution for Installation................................................................................................................................
3.4 Dimension Data ...........................................................................................................................................
3.5 Installation Clearance Data.........................................................................................................................
4 INDOOR UNIT INSTALLATION........................................................................................
4.1 Installation of Duct Type..............................................................................................................................
4.2 Installation of Cassette Type........................................................................................................................
4.3 Installation of Floor Ceiling Type ...............................................................................................................
5 REFRIGERATION PIPING WORK ...................................................................................
5.1 Connection between Indoor and Outdoor Units........................................................................................
5.2 Refrigerant Charging and Trial Running .................................................................................................

6 ELECTRIC WIRING WORK...............................................................................................
6.1 Wiring Principle ...........................................................................................................................................
6.2 Electric Wiring Design .................................................................................................................................
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MAINTENANCE......................................................................................................
1 TROUBLE TABLE.................................................................................................................
1.1 Please check the following items before contact the maintenance serviceman.......................................
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1.3 Error description..........................................................................................................................................
2 FLOW CHART OF TROUBLESHOOTING .....................................................................
3 WIRING DIADRAM..............................................................................................................
3.1 Outdoor unit .................................................................................................................................................
3.2 Indoor unit ....................................................................................................................................................
4 DISASSEMBLY AND ASSEMBLY PROCEDURE OF MAIN PARTS............................
4.1 Outdoor Unit................................................................................................................................................
4.2 Indoor Unit....................................................................................................................................................
5 EXPLODED VIEWS AND PART LIST ...............................................................................
5.1 Outdoor Unit ................................................................................................................................................
5.2 Indoor Unit....................................................................................................................................................

1
PRODUCT

PR
O
D
UCT
1
.2 Indoor Un
i
t
1.2.2 Cassette type
U
nits
S
eries
M
odel
C
apac
i
t
y
R
ef
.
Power
Suppl
y
A
pp
earance
C
ooling
(
kW
)
H
eating
(
kW
)
Cassette
Type
Indoor Unit
MUL12- FWCA 3,5 3,85
R
41
0
A
220
~
240V
-
1Ph-50H
z
MUL18- FWCA 5
5.
5
0
MUL24- FWCA 7,1 8.0
0

3
PRODUCT
2 NOMENCLATURE
NO. Description Options
1Name Model
2Product Type
DTA: Duct type
FWCA: Cassette type
CON: Floor type
3Cooling Heating :
H: Heat pump
4Cooling Capacity 12 represents 12000Btu/h
1kW=3,412KBtu
5Series Series code
6Power Supply Voltage:
220-240V - 1Ph - 50Hz
7Refrigerant R410A
8Compressor Frequency DC inverter type

4
PRODUCT
3 FUNCTION
Function Duct type Cassette type Floor ceiling type
For Comfortable
Air Conditioning
Fan operation Mode ƔƔ Ɣ
Auto Swing Controller - ƔƔ
Timer Selector ƔƔ Ɣ
Auto Mode Operation ƔƔ Ɣ
Cool Mode Operation ƔƔ Ɣ
Heat Mode Operation ƔƔ Ɣ
Dry Mode Operation ƔƔ Ɣ
Fan Mode Operation ƔƔ Ɣ
Sleep mode setting ƔƔ Ɣ
Drain Pump ƔƔ -
For Flexible Control
Wired Controller ƔƔ Ɣ
Wiredless Remote Controller ƔƔ Ɣ
Ɣ+DYH)XQFWLRQV
- :No Functions

7
PRODUCT
4.2.2 Cassette type
Model Heat pump MUL12- FWCA MUL18- FWCA MUL24- FWCA
Capacity
Cooling kW 3.5 5 7.1
Heating kW 3.85 5.5 8
Power supply V-Ph-Hz 220~240-1-50 220~240-1-50 220~240-1-50
Motor power input kW 0.07 0.07 0.1
$LUÀRZYROXPH
m3/h 680 680 1180
CFM 400 400 694
Sound pressure level(H/L) dB(A) 42/38 42/38 45/41
Fan motor
Output kW 0.0385 0.0385 0.055
Running current A 0.374 0.374 0.535
Connecting
pipe
Gas inch ƎPP ƎĭPP ƎĭPP
Liquid inch ƎĭPP ƎĭPP ƎĭPP
Connection method Flare Connection Flare Connection Flare Connection
Drain pipe
External dia. mm 31 31 31
Thickness mm 3 3 3
Outline
Dimension
Body(W×D×H) mm 840×840×190 840×840×190 840×840×240
Panel(W×D×H) mm 950×950×60 950×950×60 950×950×60
Package
Dimension
Body(W×D×H) mm 960×960×257 960×960×257 960×960×310
Panel(W×D×H) mm 1040×1025×115 1040×1025×115 1040×1025×115
Net Weight
Body kg 25 25 30
Panel kg 6.5 6.5 6.5
Gross Weight
Body kg 33 33 38
Panel kg 10 10 10
Loading quantity
20'GP 72 72 72
40' GP 144 144 144
40' HQ 144 144 144

9
PRODUCT
Notes:
a. The rated cooling capacity data is measured under the following work condition: Indoor Temperature is
27ćDB, 1 9ćWB. Outdoor Temperature is 35ćDB.The rated heating capacity data is measured under the following
work condition: Indoor Temperature is 20ćDB. Outdoor Temperature is 7ćDB, 6ćWB.
b. The data will change with the change of products. Refer to those parameters listed on nameplate.
c. Noise was tested in semi-silenced room, so the actual noise value will be a little higher for change of ambient.
4.3 Working Temperature Range
Indoor side state Outdoor side stae
Dry bulb temp. ćWet bulb temp. ćDry bulb temp. ćWet bulb temp. ć
Rated Cooling 27 19 35 24
Max. cooling 32 23 48 26
Min. cooling 21 15 18 —
Rated Heating 20 15 7 6
Max. heating 27 — 24 18
Min. heating 20 15 ˉ15 ˉ16
Notes˖
a. The heating/cooling capacity and noise listed below are all measured before the shipment.
b. All parameters listed below are measured under the standard working conditions. If there is any change, the
parameters marked on the nameplate always prevail.
c. The heating capacity of the indoor unit just involves that of the heat pump but apart from that of the auxiliary
electric heater.

10
PRODUCT
5 PIPING DIAGRAM
Schematic Diagram of Multisplit Inverter Heat Pump
Schematic Diagram of Multisplit Inverter Heat Pump
The outdoor and indoor units start to work once the power is switched on. During the cooling operation, the low
temperature, low pressure refrigerant gas from the heat exchanger of each indoor unit gets together and then is taken
into the compressor to be compressed into high temperature, high pressure gas, which will soon go to the heat exchanger
of the outdoor unit to exchange heat with the outdoor air and then is turned into refrigerant liquid. After passing through
the throttling device, the temperature and pressure of the refrigerant liquid will further decrease and then go the main
valve. After that, it will be divided and go to the heat exchanger of each indoor unit to exchange heat with the air which
needs to be conditioned. Consequently, the refrigerant liquid become low temperature, low pressure refrigerant gas
again. Such a refrigeration cycle goes round and round to achieve the desired refrigeration purpose. During the heating
operation, the four-way valve is involved to make the refrigeration cycle run reversely. The refrigerant radiates heat in
the heat exchanger of the indoor unit (so do the electric heating devices) and absorb heat in the heat exchanger of the
outdoor unit for a heat pump heating cycle so as to achieve the desired heating purpose.
M