Drain Piping - Carrier 38GJQ Series Installation Instructions Manual

Refrigerant Piping
Use the following steps to connect the refrigerant pipe.
1 Drill a hole (2 1/6 in. (55mm) in diameter) in the spot
indicated by the symbol in the illustration (see Fig. 64).
2 The location of the hole is different depending on which
side of the pipe is taken out.
3 For piping, see Connecting the refrigerant pipe, under
Indoor Unit Installation (1).
4 Allow space around the pipe for a easier indoor unit pipe
connection.
Left bottom piping
3 in (75 mm)
Fig. 64 – Piping
3 in (75 mm)
3 in (75 mm)
Left back piping Right back piping
Fig. 65 – Back piping
CAUTION
!
The suggested shortest pipe length is 8.2 ft. (2.5m) to avoid
noise from the outdoor unit and vibration. (Mechanical
noise and vibration may occur depending on how the unit is
installed and the environment in which it is used.)
See the installation manual for the outdoor unit for the
maximum pipe length.
Refrigerant pipe
Fig. 66 – Refrigerant Pipe
Fig. 67 – Refrigerant Pipe
(Unit : in/mm)
Wall
Right bottom piping
3 in (75 mm)
1 7/9 in (45 mm)
Left/right piping
wall
Floor
3 in (75 mm)
Boring a Wall Hole and Installing the Wall
Embedded Pipe
S
For walls containing metal frame or metal board, be sure
to use a wall embedded pipe and wall cover in the
feed−through hole to prevent water leakage.
S
Be sure to caulk the gaps around the pipes with caulking
material to prevent water leakage.
1 Bore a feed−through hole of 2 1/6 in. (55mm) in the wall so
it has a down slope toward the outside.
2 Insert a wall pipe into the hole.
3 Insert a wall cover into the wall pipe.
Inside
Wall embedded pipe
(field supply)
Wall hole cover
Fig. 68 – Wall Embedded Pipe
4 After completing refrigerant piping, wiring, and drain
piping, caulk the pipe hole gap with putty.

Drain Piping

1 Use a commercial rigid polyvinyl chloride pipe general VP
20 pipe, outer diameter 1 in. (26mm), inner diameter 4/5 in.
(20 mm) for the drain pipe.
2 The drain hose (outer diameter 5/7in. (18mm) at the
connecting end, 8 2/3 in. (220mm) is supplied with the
indoor unit. Prepare the drain pipe picture below position.
3 The drain pipe should be inclined downward so that water
flows smoothly without any accumulation (should not be a
trap).
4 Insert the drain hose to this depth so it will not be pulled out
of the drain pipe.
5 Insulate the indoor drain pipe with .39 in. (10mm) or more
of insulation material to prevent condensation.
6 Remove the air filters and pour some water into the drain
pan to ensure the water flows smoothly.
6 in (150 mm)
Drain hose
4 in (100 mm)
Reducer
Fig. 69 – Trap
35
Outside
Caulking
2 1/6 in (55 mm)
Wall embedded pipe
(field supply)
Must be no trap
Do not touch water
2 in (50 mm)
or more
Vinyl chloride
drain pipe