Mitsubishi Electric City Multi Series User Manual

32
OCH610G
4
ø4
3
6
5
ø3
2
ø2
1
ø1
ø4
ø3
ø2
ø1
Controller board
Drive circuit
Connector(CN60)
12 V DC
BN
RD
BU
OG
YE
WH
M
4
6
2
3
5
1
BU
BN
YE
OG
RD
WH
Linear expansion valve
<Thermistor characteristic graph>
Room temperature detection thermistor (TH21)
Pipe temperature detection thermistor/liquid (TH22)
Pipe temperature detection thermistor/gas
(TH23)
Thermistor R
0=15 k" ± 3%
Fixed number of B=3480 ± 2%
Rt=15exp { 3480( ) }
30_F 15.8 k"
50_F 9.6 k"
70_F 6.0 k"
80_F 4.8 k"
90_F 3.9 k"
100_F 3.2 k"
Thermistor for
lower temperature
9-1-2. Linear expansion valve
1 Operation summary of the linear expansion valve
• Linear expansion valve opens/closes through stepping motor after receiving the pulse signal from the indoor controller board.
• Valve position can be changed in proportion to the number of pulse signals.
<Connection between the indoor controller board and the linear expansion valve>
1
273+(t-32)/1.8
1
273
0
10
20
30
40
50
0-20 20 40 60 80 100 120
< Thermistor for lower temperature >
Temperature (°F)
Resistance (k)
9-1-1. Thermistor
Note : Since the number of the connector at the controller board side and the relay connector are different, follow the color of
the lead wire.

Mitsubishi Electric City Multi Series Specifications

General

Refrigerant	R410A
Control	Centralized control, individual control
Indoor Unit Types	Ceiling Cassette, Ceiling Suspended, Wall Mounted
Power Source	Electric
Piping Length	Up to 1000m total piping length (depending on the model)
Height Difference	Up to 50m