Friedrich MD18Y3JM User manual

Multi Zone Air Conditioner
SVC MANUAL (Exploded View)
CAUTION
Before Servicing the unit, read the safety
precautions in General SVC manual.
Only for authorized service personnel.
MODEL: MD18Y3JM
960-920-07

1. Specification
Indoor unit type
Ceiling Concealed Duct - Low Static
Model
MD18Y3JM
Power Supply
Ø / V / Hz
1/ 208~230/ 60
Capacity(*)
Btu/h class
18,000
Current Running Current
A
0.25
Fan
Motor Type
BLDC
Fan Type
Sirocco Fan
Motor Output(W) x No. of Unit
19 x 2
Air Flow Rate
(H / M / L)
CMM
15/ 13.5/ 11.5
CFM
530/ 477/ 406
External Static Pressure
mmAq
4
Capacitor
μF / Vac
-
Drive
Direct Drive
Coil
Row x Column x FPI
2R x 11C x 21
Dimensions
(W x H x D)
Body
mm(inch)
1,100 x 190 x 575 (43 5/16 x 7 15/32 x 22 21/32)
Decorative Panel
mm(inch)
-
Net Weight
Body
kg (lbs)
26.5 (58.4)
Decorative Panel
kg (lbs)
-
Air Filter
Long life filter
Sound Level (H / M / L)
dB(A)+3
34/ 31/ 29
Piping
Connections
Liquid
mm (inch)
6.35 (1/4)
Gas
mm (inch)
12.7 (1/2)
Drain(OD/ID)
mm(inch)
32 / 25(1.26/0.984)
Dehumidification Rate
l/h
2
Safety Devices
Fuse, thermal protector for fan motor
Temperature Sensor
Thermistor
Refrigerant
R410A
Refrigerant Control
EEV(in Outdoor unit)
Transmission Interunit Cable
No. x AWG
4X18(Including Earth)
Note:
1. Capacities are based on the following conditions:
Cooling: - Indoor Temperature 26.7˚C(80˚F) DB/19.4˚C(67˚F)
- Outdoor Temperature 35˚C(95˚F) DB/23.9˚C(75˚F)
Heating: - Indoor Temperature 21.1˚C(70˚F) DB/15.6˚C(60˚F) WB
- Outdoor Temperature 8.3˚C(47˚F) DB/6.1˚C(43˚F) WB
Piping Length - Interconnecting Piping Length 7.5m(24.6 ft.)
- Level Difference of Zero
2. Wiring cable size must comply with the applicable local and national code.
3. The specification may be subject to change without prior notice for purpose of improvement.
4. For more Capacity(*),refer to the combination table
Conversion Formula
kW=Btu/hclassX0.0002931
cfm = CMM x 35.3
- 2 -

2. Function Table
Category
Function
MD18Y3JM
Air flow
Air supply outlet
1
Airflow direction control(left & right)
-
Airflow direction control(up & down)
-
Auto swing(left & right)
-
Auto swing(up & down)
-
Airflow steps(fan / cool / heat)
3 / 3 / 3
Chaos swing
-
Chaos wind(auto wind)
X
Surge cool(Power wind)
X
Swirl wind
X
Air purifying
Deodorizing filter
X
Plasma air purifier
X
Prefilter(washable / anti-fungus)
O
Installation
Drain pump
O
E.S.P. control
O
Electric heater(operation)
X
High ceiling operation
-
Reliability
Hot start
O
Self-diagnosis
O
Soft dry operation
O
Convenience
Auto changeover
X
Auto cleaning
X
Auto operation(artificial intelligence)
O
Auto restart operation
O
Child lock
O
Energy-Saving Cooling Mode
X
Forced operation
X
Group control
O
Sleep mode
X
Timer(on/off)
X
Timer(weekly)
X
Two thermistor control
O
Individual
control
Wide wired remote controller
DWC1
Deluxe wired remote controller
-
Simple wired remote controller
O
Simple wired remote controller(for hotel use)
X
Wireless remote controller(simple)
X
Wireless LCD remote control
X
Wireless LCD remote control(Ez)
X
CAC network
function
General central controller (Non LGAP)
X
Dry contact
X
Central control(LGAP)
X
PDI(power distribution indicator)
X
PI 485
X
Special
function kit
CTIE
X
Zone control
X
Others
Thermistor
-
O : Applied X : Not applied – : No relation
Option : Model name & price are different according to options, and assembled in factory with main unit.
Accessory : Installed at field, ordered and purchased separately by the corresponding model name, supplied with separate
package.
- 3 -

3. Piping Diagrams
Heating
Heatexchanger
Gas pipe connection port
(flareconnection)
Cooling
M
Th3
Th1
Sirocco Fan
Th2
Liquid pipe connection port
(flareconnection)
LOC.
Description
PCB Connector
Th1
Thermistor for suction air temperature
CN_ROOM
Th2
Thermistor for evaporator inlet temperature
CN_PIPE/IN
Th3
Thermistor for evaporator outlet temperature
CN_PIPE/OUT
- 4 -

4. Wiring Diagrams
CN_REMO CN_PIPE/IN CN_POWER
CN_PIPE/OUT CN_ROOM
CN_D/PUMP
CN_CC
CN_DISPLAY
CN_OPTION
CN_FLOAT CN_MOTOR1
CN_MOTOR2
- 5 -

5. Exploded View
W4811B
W3110
263230B
159830
263230C
336600B
130911
359012A
346810B
349610
147901
249951
268711C
263230A
336600A
W6640
359012B
268711E
TEMP
FAN
SPEED
OPER
MODE
267110
354210
352118A
W51620
330871
352118B
158591
352150
437213
137211
- 6 -

Model: MD18Y3JM
Loc No.
Description
Friedrich Part #
147901
Barrier,Indoor
67600403
W4811B
Bracket Assembly
67600703
349610
Bracket Assembly,Motor(Indoor)
67600708
130911
Cabinet Assembly,Indoor
67600809
W3110
Case
67600925
249951
Case Assembly,Control(Indoor)
67600904
W6640
Connector,Terminal Block
67601407
354210
Evaporator Assembly,First
67602010
359012A
Fan Assembly,Blower
67602103
359012B
Fan Assembly,Blower
67602105
159830
Filter Assembly,Air Cleaner
67602201
352150
Hose Assembly,Drain
67602801
336600A
Housing,Wrapper
67602903
336600B
Housing,Wrapper
67602904
346810B
Motor Assembly,DC,Indoor
67603310
346810B
Motor,DC
67603331
330871
Pan Assembly,Drain
67603703
137211
Panel Assembly,Front(Indoor)
67603801
437213
Panel Assembly,Rear(Indoor)
67603816
268711C
PCB Assembly,Main
67603908
268711E
PCB Assembly,Option
67603918
158591
Pump Assembly,Water
67604100
267110
Remote Controller Assembly
67604300
W51620
Socket,Flare
67604401
263230C
Thermistor Assembly,NTC
67604805
263230A
Thermistor Assembly,NTC
67604809
263230B
Thermistor Assembly,NTC
67604822
263230A
Thermistor,NTC
67604825
263230C
Thermistor,NTC
67604827
352118A
Tube Assembly,Menifold(Indoor)
67606002
352118B
Tube Assembly,Menifold(Indoor)
67606006

FriedrichAirConditioningCo. I10001ReunionPlace,Suite500 ISanAntonio,TX78216 I877.599.5665
www.friedrich.com