Install The Connecting Pipe - intensity MDV-D28Q4/N1-D Installation Manual

5.2 Drain test
1. Before testing, please ensure that water could be drained
fluently, and check all joints are sealed.
2. Drain test shall be processed before construct ceiling for a new
house.
1) Remove water finding cap, charge 2000ml water into defrosting
pan through water finding orifice by water charged pipe. (See Fig.
5-3)
2) Power on the unit and run cooling operation. Check that the
operation noise of water drain pump is normal and water discharge
fluently (depend on the length of drain pipe, water will drain delay
about 1 minute), then check whether joints are leakage.
Pumping pipe
Water finding orifice
Main body
Defrosting pan
In case malfunction occur, problems settlement shall be taken
as soon as possible.
3) Stop the air conditioner, detect whether exists abnormal
problems after 3 minutes. Irrationally set of the drainpipe would
lead to water backflow and make alarm director in control box
flashing, or even cause water overflow from defrosting tray.
4) Level alarm will flash, if water were continually charged and
over to alarm level. Please check whether the drain pump
operates water discharge at once. In case level were not
decreasing under alarm level after 3 minutes, unit would close
down. You must cut off power and discharge accumulated water
firstly, then the unit could be restarted normally.
5) Cut off power, discharge accumulated water, and reset the
test cap to its original position.
CAUTION
A drain plug at the bottom of main unit is used for discharging
accumulated water in defrosting tray when malfunction occur.
During normal operation, please ensure that this plug is stuffed
tightly to prevent water leakage.
Water finding cap
Water charged pipe
Drain plug
Fig. 5-3
CAUTION
6. INSTALL THE CONNETING PIPE
6.1 The connective length of indoor and outdoor piping
and those height difference requirements.
Connect to different outdoor units with different connective length
and height difference requirements. Please refer to Indoor Unit
Installation Manual for detail.
6.2 Piping materials and size
1) Piping materials: Copper tube special for air conditioner, normally
T2M.
2) Piping size: Refrigerant is R22, please refer to Table: 6-1; while
refrigerant is R410A, please refer to Table: 6-2
Table: 6-1
Piping size (mm)
Indoor unit model
Liquid side
Applicable for the models employing R22 refrigerant
Table: 6-2
Piping size (mm)
Indoor unit model
Liquid side
Applicable for the models employing R410A refrigerant
6.3 Procedure of connecting pipes
1. Measure the required length of the connective pipe, and make the
connective pipes in the following procedure. (Refer to Pipeline
Connection for details)
1) Connect the indoor unit first, and then connect the outdoor unit.
a. The pipe bend should be handled carefully, without damaging the
pipe and insulation layer.
b. Before screwing up the flared nut, apply refrigerant oil at the outer
surface of the pipeline flare and the taper surface of the connection
nut. Screw up the nut for 3~4 circles beforehand (see Fig.6-1).
Apply refrigerant oil
c. When connecting or disconnecting the pipeline, be sure to use
two spanners concurrently.
d. Do not rest the weight of the connective pipe on the adapter of the
indoor unit. Too heavy load on the adapter of the indoor unit may
deform the pipe and thus affect the cooling/heating effect.
Air side
Air side
Fig.6-1
installation manual
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