Haier HCFU-42CF03 Service Manual page 18

Fig. 10
Indoor unit
Indoor unit
When using an auxiliary pipe, make sure that the fastener used is insulated in the sane way.
DRAIN PIPING
Install the drain pipe with downward gradient (1/50 to 1/100) and so there are no rises or traps in the pipe.
Use general hard polyvinyl chloride pipe (VP25)[outside diameter 38 mm.]
During installation of the drain pipe,be careful to avoid applying pressure to the drain point of the unit.
When the pipe is long,install supporters(Fig 11).
Do not perform air bleeding.
Always heat insulate (8mm or over thick) the indoor side of the drain pipe.
Fig. 11
18
Commercial Air Conditioner
Coupler heat insulation(large)
Coupler heat insulation(small)
BAD
Bracket
Coupler pipe (large)
Coupler pipe (small)
Nylon fastner (large)
Nylon fastner (small)
GOOD
BAD
5 to 6.5 ft
(1.5 to 2m)
Model: HCFU-42CF03
HCFU-42HF03
No gap
Coupler heat insulation