Drain Piping; Drain Discharging Boss - Hitachi RAS-2-HVNP Service Manual

3. Piping work and refrigerant charge

3.7 Drain piping

3.7.1 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.
  
Connecting procedure
1 Insert the plastic cap into the drain boss up to the extruded portions.
2 Insert the boss into the unit base up to the extruded portions.
3 Size of the drain boss is:
- For DBS-12L: 15 mm (O.D.)
For DBS-26: 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.
RAS-(2-2.5)HVNP / RAS-3HVNC
Drain hole
Plastic cap
Plastic cap
Push Push
100 mm
≥ O.D. ∅ 16 mm
85
Model
DBS-12L
DBS-26
Drain hole
Plastic cap
Drain pipe
SMGB0079 rev.0 - 01/2013
Applicable Model
RAS-(2/2.5)HVNP
RAS-3HVNC
RAS-3HVNPE
RAS-(4-6)H(V)N(P/C)E
RAS-(8-10)HN(P/C)E
RAS-12HN(P/C)
RAS-3HVNPE / RAS-(4-6)H(V)N(P/C)E /
RAS-(8-10)HN(P/C)E / RAS-12HN(P/C)
Drain pipe
Drain pipe
Extruded portion
Drain Boss
Drain hole
of Base
Rubber cap
3