Drain Discharging Boss - Hitachi RAS-5HVRNM1E Service Manual

3 Piping work and
refrigerant charge
3 Correct position of twin distributor
Correct position of twin branch pipe
B
C
D
A. Up.
B. Greater than 0.5 m.
C. Main pipe.
D. Refrigerant direction.
E. Refrigerant direction.
F. Branch pipe.
G. Main pipe.
4 Correct position of triple branch pipe
Install the header horizontally
Example: Triple Branch pipe
1. Gas piping.
2. Liquid piping.

3.3.5 Drain discharging boss

When the base of the outdoor unit is temporarily used as a drain receiver and the drain water in it is discharged, this drain
boss is used to connect the drain piping.
Model Applicable Model
DBS-26 H(V)RNM(1)(E)
Connection 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 The outer diameter section of the drain boss is 32 mm.
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 may not be sufficient to collect drain water. If collecting a big amount of drain water should
be necessary, provide a drain-pan bigger than the unit base supplied one, and install it under the unit with
drainage.
68
SMGB0060 rev. 1- 12/2010
A
F
E
G
Wrong position of twin branch pipe
A
B
C
C
A. Refrigerant direction
B. Main pipe
C. Branch pipe
1
2
B
A
C