Drain Piping; Electrical Wiring; General Check - Hitachi HRNM Serie Installations- Und Betriebshandbuch

DRAIN PIPING

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14. DRAIN PIPING
14.1. DRAIN DISCHARGING BOSS
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.
Model
DBS-26
Connecting procedure
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. Size of the drain boss is 32 mm (O.D.)
4. A drain pipe should be field-supplied
NOTE:
Do not use this drain boss set in a cold area, because
the drain water may freeze.

15. ELECTRICAL WIRING

15.1. GENERAL CHECK

ATTENTION:
Turn OFF the main power switch to the indoor unit
-
and the outdoor unit before electrical wiring work or a
periodical check is performed.
Check to ensure that the indoor fan and the outdoor
-
fan have stopped before electrical wiring work or a
periodical check is performed.
Protect the wires, drain pipe, electrical parts, etc. from
-
rats or other small animals. If not protected, rats or
other small animals may gnaw at unprotected parts
and at the worst, a fire will occur.
Avoid the wires from touching the refrigerant pipes,
-
plate edges and electrical parts inside the unit.
Otherwise, the wires will be damaged and at the
worst, a fire will occur.
CAUTION:
Tightly secure the wires with the cord clamp inside
the indoor unit.
Applicable Model
RAS-HRNM
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.
Bottom base view
Drain Hole (2-Ø26)
Drain Boss
NOTE:
Fix the rubber bushes with adhesive when conduit
tubes to the outdoor unit are not used.
1. Make sure that the field-selected electrical
components (main power switches, circuit
breakers, wires, conduit connectors and wire
terminals) have been properly selected
according to the electrical data given in this
technical catalog. Make sure that the
components comply with National Electrical
Code (NEC).
2. Check to ensure that the power supply voltage
is within ±10% of the rated voltage.
3. Check the capacity of the electrical wires. If the
power source capacity is too low, the system
cannot be started due to the voltage drop.
4. Check to ensure that the ground wire is
connected.
5. Power Source Main Switch
Install a multi-pole main switch with a space of
3.5mm or more between each phase.
Rubber Cap