Midea 09 User manual

1
A quick reference guide for Midea High
Wall split systems installations

2
Pages
System Data (pipe lengths/gas charges etc) 3-4
Easy Wiring Guides 5-8
Wifi and KJR29B installation 9-13
Wifi Set up 14-15
AG Series Multi function board 16-21
Commissioning 22-25
Common Installation Faults 26-28

3
Pipe sizes/Gas charges
And cable sizes 4
Page

4
Pipe and Cable Sizes/Charging
Piping Information
Model: 09 12 18 24
Liquid Line Inch 1/4 1/4 1/4 3/8
Gas Line Inch 3/8 3/8 1/2 5/8
Drain Line Φ mm 16 16 16 16
Max Length M 25 25 30 50
Max Height M 10 10 20 25
Electrical Wiring Information
Model: 09 12 18 24
Mains Outdoor 3x1.5mm² 3x2.5mm²
Interconnecting/Indoor Power 5x1.5mm² 5x2.5mm²
Power Supply Information
Model: 09 12 18 24
Outdoor Ph/A 1/16 1/16 1/16 1/20
Indoor Powered from Outdoor Unit
Refrigerant Charging Information
Model: 09 12 18 24
Pre – Charge Kg 0.5 0.5 1.0 1.6
Charged to M 5 5 5 5
Additional g/m 12 12 12 24
Refrigerant Type R32
PLEASE NOTE – when using the 4 core wiring method the interconnecting cable for size 24 systems can be
downsized to 1.5mm

5
5 core method 5
4 core method 6
4 core method explanation 7
Page

6
High Wall Easy Wiring Guide
•Interconnecting power supply must be
locally isolated with a 5amp switch fuse
spur to protect the indoor PCB
•‘W’ and ‘S’ must not be switched (crimp
straight through)
•W is a switched live and powers the
condenser using the energy efficiency
relay
L,N,E
W,L,N,E,S W,L,N,E,S

7
High Wall Easy Wiring Guide – 4 core method
•Interconnecting power supply must be
locally isolated with a 5amp switch fuse
spur to protect the indoor PCB
•‘S’ must not be switched (crimp straight
through)
•Move the spade connection of W at the
condensing unit to the spare way on
1(L) (see next page for explanation)
L,N,E
L,N,E,S L,N,E,S

8
Wiring Information – 4 Core Interconnecting
For instances where a 4 core interconnecting is to
be used we can bypass the 1W standby relay and
power the condenser directly from the mains
supply
This reverts the system back to 5W standy power
usage, the same as all other manufacturers
To achieve this, when the unit is powered down,
we need to move the brown spade connection
from the W terminal and replace it onto the spare
connection on the 1(L) terminal
You then wire with a 4 core cable and miss W at
both units

9
Installation Overview 10-11
KJR29B single unit 12
KJR29B multiple units 13
Page

10
Wifi & Controller Installation
The connections for both the wifi adapter and a
hard wired controller are on the display board
To access it, lift up the fascia and remove the
screw that is holding it in place
Ease the display board from the fascia holdings
and it will hang from the connection made to the
indoor pcb

11
Wifi & Controller Installation
CN2 – KJR29B controller uses an
adapter cable to connect to the wall
mounted units
CN3 – The wifi dongle plugs into
the housing connected to CN3

12
Installation – Controllers – KJR29B (one to one)
•Comes with a 6m cable
•Jack plugged one side/made off the other
•Jack plugs into fascia/display board
•Other end is made off and wired into the
terminals
•A&B – Comms
•C&D – 5v Power
A – Brown/Blue
B – Red
C- Yellow
D - Black

13
Installation – Controllers – KJR29B (one to many)
•KJR29B master cable can be
supplied free of charge (terminal
strip added to A&B)
•Plugs into the unit closest to the
controller
•Slave adapters can be ordered
for additional units
•These consist of the same jack
plug as the master cable but only
has connections for A&B
•2 core cable can be daisy chained
between A&Bs and connected
onto A&B terminals at the
master
A – Brown/Blue
B – Red
C- Yellow
D - Black

14
Step by Step guide 15
Video link
https://www.youtube.com/watch?v=scX-
uOiLVPA
Page

15
App Set Up
•Download the Midea Air app from
Apple or Google Play store
•Set up account
•Click Add Unit
•Switch the power off to the unit
and restart (the procedure must
be completed within 8 mins of
power on)
•Press the LED button (red circled)
7 times until the unit shows AP on
the display
•Follow the instructions on the app

16
Versions of MFB 17
Installation options 18
Components 19
Easy wiring guide 20
Dip switch settings 21
Page

17
Versions and Functions of MFB
Port for 2-wired non-polarity controller
XYE ports for central controller
Remote On/Off
Remote On/Off
Fault Output
Fault Output
•Central controller connection
•Remote On/Off
•Fault Output
•2 Core Local controller connection
•Remote On/Off
•Fault Output

18
Installation Choices
•The multifunction box can be installed in the back of the
panel, where there is no need for additional holder or
bracket
•It can also be provided with extended 1m long cables for
installation exterior to the fascia (ceiling void/truncking
etc)

19
Components
One adapter plate subassembly would include:
•Transfer PCB
•7-wired cable, the 4-wired part should connect to the main control
PCB board; the 3-wired part should connect to the multi function
board
•2-wired cable which could connect to main control PCB board

20
MFB Easy Wiring Guide