Mitsubishi Electric City Multi PEFY-P06NMSU-E, Technical & Service Manual

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[
VII
Microprocessor Control ]
- 18 - HWE08010 GB
2) PEFY-P-NMHU-E, PDFY-P-NMU-E and other models
ΠFor relay X use the specifications given below Operation coil
Rated voltage: 12VDC
Power consumption: 0.9W or less
* Use the diode that is recommended by the relay manufacturer at both ends of the relay coil.
Œ
The length of the electrical wiring for the PAC-YU25HT is 2 meters (6-1/2 ft.)
Œ
To extend this length, use sheathed 2-core cable.
Control cable type: CVV, CVS, CPEV or equivalent.
Cable size: 0.5 mm
2
~ 1.25 mm
2
(16 to 22 AWG)
Don't extend the cable more than 10 meters (32ft)
(4) Wiring restrictions
Œ
Keep the length of the cable connecting to the circuit board of the indoor unit shorter than 10 meters (32ft).
Œ
Longer than 10 meters (32ft) could cause improper operation.
Œ
Use a transit relay when extending wiring such as remote wiring.
CN24
CN22
X
X
Remote control board Relay circuit
Adapter
Indoor unit
control board Outdoor unit
control board
r
et
a
e
H
cir
t
c
el
E
e
cr
u
o
s
r
e
w
o
p
Red 1
White 2
• PUHY, PURY-P-
TGMU type Dip
switch SW5-2
“ON”
• PUHY, PURY-P-
YHMU type Dip
switch SW5-10
“ON”
• PUMY series Dip
switch SW4-4
“ON”
Preparations in the field Maximum cable length
is 10 m (32ft)
w
oll
e
Y
n
e
er
G
White 1
Dip switch SW3-2 “ON”
(applicable only when a panel
heater is connected)
2
Electric Heater
or panel
heater
Recommended circuit
Wiring diagram
1-phase power
supply
208V, 230V/60Hz
Control board
FS1, 2 ----- Thermal fuse
H1, H2 ----- Heater
26H --------- Overheat protection
thermostat
88H --------- Electromagnetic contactor
FS1
FS2
FS1
FS2
R
S
R
S
CN24
H2
88H
H1
88H
26H
88H