Mitsubishi Electric City Multi PCFY-P·NGMU-E Installation Manual page 8

6. Electrical work
G
*1
H
I
*3
J
L1
K
K
Fig. 6-5
Address board
SW5
220V
(230V)
(208V)
SW1
ON
OFF
1 2 3 4 5 6 7 8 9 10
SW12 SW11
0
Fig. 6-6
8
J J
L2 *2
K
L4
J J
r
K
L
L3
K
SWA
3
240V
2
CN43
1
CN82
SW14
SWC
0 0
Constraints on transmission cable
Longest wiring length (L +L +L or L +L
1 2 4 1 3
Length between indoor unit and remote controller (R): within 33 ft (10 m)
G Outdoor unit
H Earth
I BC controller
J Indoor unit
K M-NET Remote controller
L Non-polarized 2-wire
Note:
*1 Put the transmission cable earth via the outdoor unit's earth terminal
the ground.
*2 If the remote controller cable exceeds 33 ft (10 m), use a 1.25 mm
diameter cable over the exceeded portion, and add that exceeded portion
to within 656 ft (200 m).
*3 The BC controller is required only for simultaneous cooling and heating
series R2.
Types of control cables (Fig. 6-5)
1. Wiring transmission cables: Shielding wire CVVS or CPEVS
2
• Cable diameter: More than 1.25 mm (AWG16)
2. M-NET Remote control cables
Kind of remote control cable 2-core cable (unshielded)
Cable diameter More than 0.5 (AWG20) to 0.75 mm
When 10 m is exceeded, use cable with the
same specifications as transmission line wiring
Remarks
(shielding portion is more than 1.25 mm
(AWG16))
3. MA Remote control cables
Kind of remote control cable 2-core cable (unshielded)
Cable diameter 0.3 mm
6.4. Setting addresses (Fig. 6-6)
(Be sure to operate with the main power turned OFF.)
• There are two types of rotary switch setting available: setting addresses 1 to 9 and
over 10, and setting branch numbers.
1 How to set addresses
Example: If Address is "3", remain SW12 (for over 10) at "0", and match SW11(for
1 to 9) with "3".
2 How to set branch numbers (Series R2 only)
Match the indoor unit's refrigerant pipe with the-xC controller's end connection
number. Remain SW14 other than R2 at "0".
• The rotary switches are all set to "0" when shipped from the factory. These switches
can be used to set unit addresses and branch numbers at will.
• The determination of indoor unit addresses varies with the system at site. Set them
referring to technical data.
Note:
Please set the switch SW5 according to the power supply voltage.
• Set SW5 to 230 V side when the power supply is 230 volts.
• When the power supply is 208 volts, set SW5 to 208 V side.
6.5. Switch setting for different ceiling heights
With this unit, the air flow rate and fan speed can be adjusted by setting the SWA
(slide switch). Select a suitable setting from the table below according to the installa-
tion location.
* Make sure the SWA switch is set, otherwise problems such as no wind blowing will
occur.
Ceiling Height 11.5 ft. (3.5 m)
SWA 3 (high ceiling)
SWA: Factory setting: 2 (Standard)
6.6. Sensing room temperature with the built-in sensor
in a remote controller
If you want to sense room temperature with the built-in sensor in a remote controller,
set SW1-1 on the control board to "ON". The setting of SW1-7 and SW1-8 as neces-
sary also makes it possible to adjust the air flow at a time when the heating thermom-
eter is OFF.
or L +L +L ): less than 656 ft (200 m)
2 3 4
to
2
(AWG16)
2 (AWG18)
2
2 2
(AWG22) to 1.25 mm (AWG16)
9.2 ft. (2.8 m) 7.5 ft. (2.3 m)
2 (standard) 1 (low ceiling)