Drain Piping; Electrical Wiring - Hitachi RAS-4FSNME1 Instruction Manual

DRAIN PIPING

?
N O T E
• Check that the total additional refrigerant charge is not greater than
the values given in "Maximum additional refrigerant charge"
10 DRAIN PIPING
When the base of the outdoor unit is temporarily utilized as a
drain receiver and the drain water in it is discharged, this drain
boss is utilized to connect the drain piping.
RAS-(4-6)FS(V)NME1
Drain hole
(connexion for DBS-26)
Drain hole(*)
(*) To cover these drain holes, sealing pads are included in DBS-26 kit.

11 ELECTRICAL WIRING

11.1 GENERAL INFORMATION
!
D A N G E R
• Do not connect or adjust any wiring or connections unless the
main power switch is OFF. Check and test to ensure that if there
is more than one source of power supply, all are turned OFF.
• Use an earth leakage breaker with medium sensitivity, and an
activation speed of 0.1 or less. If this is not fitted, there is a risk
of electric shock and/or fire.
• Install an earth leakage breaker, fuse or circuit breaker of the
specific capacity for each outdoor unit power line. Not fitting it
may cause an electric shock or fire.
• Check that the earth wire is securely connected, tagged and
locked in accordance with national and local codes.
!
C A U T I O N
• Before any work to the electrical wiring or regular inspections, switch
off the mains power supply of the indoor and outdoor units. Wait three
minutes before starting installation or maintenance work.
• Make sure that the interior and exterior fans have come to a complete
standstill before starting work on the electrical wiring or regular
inspections.
• Protect cables, the drainage pipe, electrical components, etc. from
rodents and insects; otherwise these might damage unprotected
components and this could result in fire.
• Do not allow cables to come into contact with the refrigerant pipes,
metal edges, printed circuit boards (PCB) or the electric components
inside the unit; the cables may be damaged and this could result in
fire.
• Connecting the operating line cables incorrectly may lead to faults
in the PCB.
• Firmly secure the cables inside the outdoor unit with plastic flanges.
• Check to ensure that screws for terminal block are tightly tightened.
• Secure the cable of the remote control switch with the cord clamp
inside the electrical box.
23 PMML0532 rev.1 - 12/2020
RAS-(8-12)FSXNME1
RAS-(4-6)FS(V)NME1 1
RAS-(8-12)FSXNME1 2
RAS-(4-6)FS(V)NME1 4
RAS-(8-12)FSXNME1 3
• Some refrigerant charge calculations differ when installing Wall
Type (RPK Series) with the expansion valve kit. Refer to the RPK
technical information.
Connecting procedure for DBS-26
1 Insert the rubber cap into the drain
boss up to the extruded portions.
2 Insert the boss into the unit base
and turn approximately 40 degree
counterclockwise.
3 Drain boss is 32 mm (O.D.).
4 A drain pipe should be field-supplied.
?
N O T E
• Do not use this drain boss set in a cold area, because the drain
water may freeze. This drain boss is not sufficient to collect all the
drain water. If collecting drain water is completely required, provide
a drain-pan that is bigger than the unit base and install it under the
unit with drainage.
For RAS-(4-6)FS(V)NME1, 1 kit DBS-26 needed; for RAS-(8-12)
•
FSXNME1, 2 kits DBS-26 needed.
?
N O T E
• Use twist pair wire (more than 0.75 mm²) for operation wiring between
outdoor unit and indoor unit, and operation wiring between indoor unit
and indoor unit.(Do not use wire with more than 3 cores).
• H-LINK twist pair shielded cable must be grounded in the outdoor
unit side.
• Use shielded wires for intermediate wiring to protect the units from
noise obstacle at length of less than 300 m and size complied with
local code.
• Sometimes, the refrigeration/heating system is not able to operate
correctly in cases when the system is supplied from the same
supply line as other major consumers (heavy machinery, power
inverter systems, cranes, welding machinery, etc). Also when the
supply cables of the major consumers and the system are very close
together, induction in the wiring may arise due to a rapid change in
the electricity consumption of the above consumers and their start-up.
The power supply line of the unit must have an exclusive power
control switch and a certified protective circuit breaker. All the
electric components in the installation (main power switches,
circuit breakers, earth leakage breakers, wiring, connectors and
connector terminals) must have been selected and installed
correctly in line with the electrical data provided in this manual,
and must comply with the applicable local regulations, codes
and standards.
Drain hole
(DBS-26)
Drain pipe
Extruted
portions
Drain boss
Rubber
cap