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