Midea CSU-05HCAA Installation And Maintenance Manual page 28

VI. Installation instructions
Quickly remove gauge manifold valve from access door for shutoff valve.
Properly connect and evacuate the refrigerant pipeline, and fully open all shutoff
valves aside the gas and liquid pipeline. If it is not operated with fully opened shutoff
valves, performance of the unit may be degraded, resulting in troubles.
Screw down the access door cover to get the initial state.
4-5 Insulation and bandage wrapping
Cover the fitting pipe sleeve by pipe cap;
All fitting pipes and valves of outdoor unit should be heat-insulated;
All fitting pipes from the fitting pipe entry of outdoor unit must be wrapped with pipeline bandage;
Fix the ends of pipeline bandage by tapes applied with adhesive;
if fitting pipe passes ceiling board, lavatory or other place with high temperature and humidity,
the thickness of heat-insulating material should be increased for fear of condensation.
4-6 Arrangement of drain pipeline
For easier drainage through drain pipeline, ensure that the drain pipeline should be
positioned in a declined mode (as shown in Figure 1).
Do not connect the drain pipeline in the same way as shown in Figure 2 - Figure 5.
Declined
Water leak
(Figure 1)
If the length of drain hose assembled on the indoor unit is too short for
operation, just connect the drain hose in the attachment box to it for
operation.
If the drain hose has to pass the indoor spaces, it must be wrapped with
heat-insulating material available in the market.
Maximum pipeline
length of 7m,
requiring no aeration.
And then screw down the cap.
Leak test
Upwards
Water leak
(Figure 2)
Installation & Maintenance Manual
If pipeline length is
longer than 7m,
aerate it with amount of gas.
(N m)
Access door cover
13.7 17.7
Valve rod cap of
19.6 29.4
shutoff valve
Drain retention
Air
Air retention
Water leak
inside pipeline
(Figure 3)
(Figure 4)
26
Screwing-down torque
(Kgf cm)
140 180
200 300
End of drain hose
dipping into water
Less than 50mm
above the floor
(Figure 5)
Drain hose
Hose (inner diameter
of 15cm) or hard PVC pipe