Hitachi RUA-NP20ATS, Инструкция по эксплуатации

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3
INSTALLATION
2. INSTALLATION
Tools and Instruments
–
General tools for
ducting.
Connection
–
Pre-drilled duct flanges are
provided at the supply and return air duct
connections. A field-supplied or optional filter box
with filter must be installed at a proper location in
the return air duct. It is recommended that flexible
duct connections be installed to minimize sound
and vibration transmission. All ducts running
outside must be sufficiently insulated and
weatherproofed.
2.2 Condensate Drain Piping
Tools and Instruments
–
General piping tools.
Drain Trap
–
A female piping thread screw
connection is provided at side of the unit.
Dimension "L" in Fig. 5 should be sufficiently
longer than the negative fan pressure at the drain
connection (50mm to 100mm, depending on the
return air duct design). Always fill the trap with
water.
For Models RUA-13AT3S and RUA-15AT3S
Fig. 5. Condensate Drain Connection
Fig. 4. Rolling,Lifitng and Rigging
2.1 Ducting Arrangement
3. ELECTRICAL WIRING
Tools and Instruments
–
One set of wiring tools,
electrical tester (Clamp meter).
Confirm that electrical power is not being supplied
to the installation location prior to any electrical
installation work.
1. Install the field-supplied main switch box at the
properly selected location.
2. Install conduit connectors in the hole for power
wiring (knockout holes).
3. Lead the main power wires and the earthing
wire through the connector to the screw
terminals for main power and earthing in the
magnetic switch box. The neutral wire to 220V
power supplies should also be led through the
connector. Firmly connect the wires with wire
terminals to the unit screw terminals R(L1),
S(L2) and T(L3) for 220V power supplies
according to Fig. 6 or the wiring label attached
to the magnetic switch box.
Schedule Check
–
Confirm that the field selected
electrical components (main power switch, fuses,
wires, conduit connections, wire terminals) are
properly selected and ensure that they comply
with national and local codes. It is recommended
that the main power switch be locked at the OFF
position, to prevent against accidental supply of
the power during unit servicing.
Service Panel
–
Access to the magnetic switch
box is provided from the service panel, which is
fixed with screws (see the panel location in the
Operation Instructions.)
3.1 Main Power Wiring Procedures
A scroll compressor is equipped. Because that
the rotation direction of the orbiting scroll of the
HITACHI scroll type compressor is fixed,
therefore a reverse & single phase sequence
protection relay is equipped in this unit.
ELECTRICAL WIRING