Airwell DVHA Serie Manuel D'utilisation Et D'installation page 18

Installation Procedures
(g) Backwater bend
Because the drainage was laied in the position of binging Subatmospheric pressure easily,
gain of elevation of water in the drain pan conducesd Leakage water, for avoiding Leakage
water，design a Backwater bend.
Configuration of Backwater bend can be cleaned, a " T" joint can be used in installing as
shown as in the picture below.
Backwater bend was installed in the neighborhood of airconditioning
A backwater bend was designed in the
middle of drain pipe s shown as in the
picture.
Testing Drainage System
(a) After finishing the electrical system, test the drainage system.
(b) During testing, make sure that the water flow passes the piping correctly without any water
leakage at the connection.
(c) In the condition of new house, test the drainage system before fitting up the ceiling.
(d) Even if it is installed in the season needed to heating, the testing should also be performed.
Procedures
(a) Provide about 1000cc of water to the equipment via air outlet port with the feed pump.
(b) During refrigerating operation, check the drainage system.
dismantle
rubber plug,
reinstall it after 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 Airwell company. Calculate the design chart and exterior static
pressure, and select the exhaust pipe with appropriate length and shapes.
special exhaust
port (purchased (purchased at
at local shop
insert the hose into
20mm-30mm of feed
pipe at bottom
main unit of air
conditioner
ceiling
suface
exhaust pipe
local shop)
H1=100mm or blower static pressure
1
H2= H1(or between 50~100mm)
2
install drainpipe clamp
main unit
check drainage via
transparent tube socket
air return
pipe
(purchased
at local shop)
special air return
pipe (purchased at
inspection
local shop) with air cleaner
hole
10
indoor unit
pour water into a
gibbose connector
drainpipe