Johnson JDMV2W - Connecting the Drain Hose

Step 8: Connect drain hose
The drainpipe is used to drain water
away from the unit. Improper installation
may cause unit and property damage.
CAUTION
 Insulate all piping to prevent conden-
sation, which could lead to water
damage.
 If the drainpipe is bent or installed
incorrectly, water may leak and cause
a water-level switch malfunction.
 In HEAT mode, the outdoor unit will
discharge water. Ensure that the drain
hose is placed in an appropriate area
to avoid water damage and slippage.
 DO NOT pull the drainpipe forcefully.
This could disconnect it.
NOTE ON PURCHASING PIPES
Installation requires a polyethylene
tube (exterior diameter = 3.7-3.9cm,
interior diameter = 3.2cm), which
can be obtained
at your local hard-
ware store or dealer.
Indoor Drainpipe Installation
Install the drainpipe as illustrated in the
following Figure.
1.
2.
Drainpipe
connecting port
Drain hose
Pipe clasp
Insulation
Cover the drainpipe with heat
insulation to prevent condensation
and leakage.
Attach the mouth of the drain hose
to the unit’s outlet pipe. Sheath the
mouth of the hose and clip it firmly
with a pipe clasp.
1-1.5m
(39-59”)
Lean over 1/50
Ceiling
(39-59”)
(7.9”)
<20cm
(21.7”)
<55cm
Lean over 1/50
1-1.5m
Drainpipe installation for units with a
pump
Ceiling
NOTE ON DRAINPIPE INSTALLATION
NOTE: When connecting multiple drain-
pipes, install the pipes as illustrated.
 When using an extended drainpipe,
tighten the indoor connection with
an additional protection tube. This
prevents it from pulling loose.
 The drainpipe should slope down-
ward at a gradient of at least 1/100 to
prevent water from flowing back
into the air conditioner.
 To prevent the pipe from sagging,
space hanging wires every 1-1.5m
(39-59”).
 If the outlet of the drainpipe is
higher than the body’s pump joint,
use a lift pipe for the indoor unit’s
exhaust outlet. The lift pipe must be
installed no higher than 55cm (21.7”)
from the ceiling board. The distance
between the unit and the lift pipe
must be less than 20cm (7.9”).
Incorrect installation could cause
water to flow back into the unit and
flood.
 To prevent air bubbles, keep the
drain hose level or slightly tiled up
(<75mm / 3”).
≥10cm
(4”)
Units with a pump
Units without a pump
0-55cm
(21.7”)
23
V.2