Haier MVAH018MV2AA Service Manual page 26

dismantle
rubber plug,
reinstalli ta fter installation
Before completing the electrical connection, a gibbose connector shall be installed on the drainpipe as to provide
it with a water inlet port. Then, if any leakage exists in the piping, check it to make the water flow of the drainpipe
smooth.
5. Installation of Air Return & Air Exhaust Pipes
For the choice and installation of air return port, air return pipe, air exhaust port and exhaust pipe, please consult
service personnel of Haier company. Calculate the design chart and exterior static pressure, and select the exhaust
pipe with appropriate length and shapes.
• The length difference between pipes should be limited to be less than 2:1;
• Make the piping as short as possible;
• Keep the min. elbow quantity;
• Wind the heat insulating material around the flange between the main
unit and the exhaust pipe for heat insulation and sealing. Install the piping
before fitting up the ceiling.
• At least 2 meters air duct is needed at air inlet and air outlet.
• Flexible connection is needed between indoor units and air duct.
• ESP should be lower than 200 Pa.
6. Cautions in Installation of Air Return Pipe & Exhaust Pipe
• It is recommended to use the blast pipes, which can be anti-condensation
and absorb sound. (purchased at local shops)
• Complete the installation of the blast pipes before fitting up the suspended
ceiling.
• Heat insulation should be made for the blast pipes.
• The special exhaust port should be arranged at the place where the air is
distributed evenly.
• An inspection hole should be left on the surface of the ceiling for future
maintenance.
insert the hose into
main unit
1~11 /4in off eedp ipe
at bottom
Main unit of air
conditioner
Ceiling
surface
Special exhaust
Exhaust pipe
port (purchased at
(purchased
local shop)
at local
shop)
Rain pipe
install drainpipe clamp
drainpipe
checked drainage via
transparent tube socket
Air return
pipe
(purchased
at local
shop)
Special air return
Inspection
pipe (purchased at
hole
local shop) with air
cleaner
24
Pour water into a
gibbose connector
Incorrect Incorrect Correct
Special exhaust port
positioning with bolt
Blast pipe
Air
Air