Drain Pipe Work - Mitsubishi Electric LGH-50RVS-E Installation Instructions Manual

4.3 Drain pipe work

1. Remove the installation label from the product, and prepare it for
drain pipe installation.
2. Remove the two backflow stoppers from the drain catch basin and
attach them to the two drain discharge holes of the drain pan.
3. Place the stopper holder so that the seal side faces the product,
then tighten the two special screws.
Drain catch basin
Drain discharge hole
Stopper holder
Backflow stopper
4. Align the drain discharge port direction of the drain catch basin
and attach it using the two special screws.
5. Connect the drain pipe to the drain discharge port, then make
sure the end of the drain pipe is capable of draining water.
Drain discharge port
The outer diameter of the drain discharge port is φ 32.
Backflow stopper
Insert all the way
to the base of the
protrusion in the drain
discharge holes.
Stopper holder
Place the seal side on the product
side.
Special screw x2
Drain catch basin
Align the drain discharge port
in the drainage direction and
secure the screws.
Drain discharge port
Special screw x2
Place through the outer groove
on the drain catch basin and
secure two places.
Drain pipe (gradient:1/100 or more)
When connecting Vinyl chloride pipe
O.D 32 mm, use pipe coupling.
Drain pipe pull-out direction
Rotate the drain catch basin and
secure the screws to pull out the drain
pipe in the desired direction.
CAUTION
• When installing the drain pipes, make sure there are no
solvents or oils on the backflow stopper and drain pan.
• Do not forget to attach the backflow stopper and stopper
holder. Failure to attach these items will make it impossible to
drain, resulting in leaks.
• When attaching the backflow stopper to the drain pan, fit it
securely into the base.
• The backflow stopper is a service part. Be sure to secure the
drain pipe in a position where the drain catch basin locking
screws can be removed so that the backflow stoppers can
be replaced when blockages occur. When the drain pipe is
secured close to the product, it may not be possible to remove
the backflow stoppers by removing the drain catch basin
locking screws.
• Install the drain pipe so that it has a downward slope (of 1/100
or more) on the drain side.
• Use a screw tightening torque of 1.42 ± 0.1 N . m. Anything else
can damage the components and cause leaks.
• The drain pipe direction can be changed. Be sure to install the
pipes so as not to hinder maintenance.
• Make sure the drain pipe is not placed directly into sewers
like which producing sulfur gas. Doing so could result in
corrosion or bad odors.
• Make sure parts are securely fitted so as to prevent leaks from
joints.
• When setting the drain pipe as the collective pipe, ensure not
to put positive pressure on Lossnay drain pipe from drain
backstream side(e.g. positive pressure from air conditioner
indoor unit or wind) It may cause drain over flow from the unit.
• Do not install any booster fan to the downstream side of the
fan of the product.
• Do not put the end of the drain pipe inside a gutter, etc. If the
gutter is frozen, it could lead to poor drainage and leaks.
• Do not use the following type of drain pipe layout. Doing so
could result in poor drainage and leaks.
• If an external drain pump is necessary, it shall be installed with
the responsibility of the installer. Error detection and indicator
function are mandatory.
Air-bleeding
→
Drained
water
6. Check that water is draining properly.
(1) Refer to "Removing the parts" in the Operating Instructions and
remove the pre-filter and Lossnay core.
(2) Pour approximately 500 ml of water into the drain pan on both
the air supply and exhaust sides.
(3) From the side of the drain catch basin, check that water is
draining from the backflow stoppers and that all water has
drained from the drain catch basin.
Drain catch basin
(4) Refer to "Assembly after maintenance" and return the product to
its original state.
Eng-9
Pass-over
→
Drained
water
Odor trap