Panasonic U-72MF2U9 Technical Data Manual page 74

8. Optional Parts
8-4-5. ELECTRICAL WIRING
8-4-5-1. General Precautions on Wiring
(1) Before wiring, confirm the rated voltage of the unit as shown on its nameplate, then carry out the wiring
closely following the wiring diagram.
(2) Each wiring connection must be done in accordance with the wiring system diagram. Wrong wiring may
cause the unit to misoperate or become damaged.
(3) Do not allow wiring to touch the refrigerant tubing.
(4) Unauthorized changes in the internal wiring can be very dangerous. The manufacturer will accept no
responsibility for any damage or misoperation that occurs as a result of such unauthorized changes.
(5) Regulations on wire diameters differ from locality to locality. For field wiring rules, please refer to your LOCAL
ELECTRICAL CODES before beginning.
You must ensure that installation complies with all relevant rules and regulations.
(6) If the power supply cord of this appliance is damaged, it must be replaced by a repair shop designated by the
1
manufacturer, because special-purpose tools are required.
WARNING
2
3 8-4-5-2. Recommended Wire Length and Wire Diameter for Power Supply System
Table 20 Solenoid valve kit
Type
456
4
656
856
4160
Table 21 Control wiring
5
Type
456
656
6
856
4160
7
8
9
● This equipment is strongly recommended to be installed with Earth Leakage Circuit
Breaker (ELCB) or Residual Current Device (RCD). Otherwise, it may cause electrical
shock and fire in case of equipment breakdown or insulation breakdown.
Earth Leakage Circuit Breaker (ELCB) must be incorporated in the fixed wiring in
accordance with the wiring regulations. The Earth Leakage Circuit Breaker (ELCB) must
be an approved 15 A, having a contact separation in all poles.
● To prevent possible hazards from insulation failure, the unit must be grounded.
Time delay fuse or
circuit capacity
15 A
Inter-unit
(between relay kit and
solenold valve kit)
control wiring
AWG #18
(0.75 mm )
2
Max. 98ft (30m)
2 - 58
Design of 3WAY VRF SYSTEM