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Service Manual
(3). When unifying multiple drain pipes, install the pipes as Fig.16.
Select converging drain pipes whose gauge is suitable for the operating
capacity of the unit.(take the cassette type unit for example)
Fig.16
(4). When
(5). If
U-type water trap shall be designed on the drainage side
of each indoor unit.(Fig.17)
(6). Install one water trap for each unit.
(7). Installation of water trap shall consider easy cleaning in the future.
Fig.17
(8). Connection of drainage branch pipe to the standpipe or
horizontal pipe of drainage main pipe
The horizontal pipe cannot be connected to the vertical pipe
at a same height. It can be connected in a manner as shown below:
NO.1: Attach the 3-way connection of the drainage pipe joint as shown
in Fig.20.
NO.2: Attach the drain elbow as shown in Fig.21.
NO.3: Attach the horizontal pipe as shown in Fig.22.
3-way connection
Connection of drain elbow
of drainage pipe joint
Fig.20
8.5.3 Precautions When Doing Riser Piping Work
(1). Make sure that heat insulation work is executed on the following
2 spots to prevent any possible water leakage due to dew condensation.
1). Connect the drain hose to the drain lift pipe, and insulate them.
2). Connect the drain hose to the drain outlet on the indoor unit,
and tighten it with the clamp.
Fig.23
Installation and Maintenance
T-joint converging drain pipes
T-joint converging drain pipes
suction of outdoor air. Therefore,
Fig.18
Fig.19
Connection of horizontal pipe
Fig.21
Fig.22
39 3/8 - 59 1/16
inch
Drain lift pipe
(4). Secure a downward gradient of 1/100 or more for the drain
pipe.To accomplish this, mount supporting brackets at an
interval of 39 3/8 - 59 1/16 inch.
39 3/8 - 59 1/16 inch
(Correct) 1/100 or more gradient
(5) The incline of attached drain hose should be 2 15/16 inch or less so
that the drain outlet does not have to withstand additional force.
8.5.4 Testing of Drain Piping
Shown in the Fig.26, Add approximately 1liter of water slowly
into the drain pan and check
Drain vent for repair use (plastic stopper
is included) (drain the water in waterspoit
by this outlet vent)
3 15/16 inch
Fig.26
<Immiting water from the outlet vent terminal>
8.6 The Panel Installation
(1) See the figure below for the relationship of the front panel
and the connecting pipe.
×
(wrong)
Fig.24
Fig.25
Drain hose
Test hole cover
Test hole
<Immiting water from the rest hole>
Plastic water pot (The length of
the pipe should be about 3 15/16 inch.)
Fig.27
27
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