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INDOOR UNIT INSTALLATION
Step7: Connecting Fresh Air Pipe and place the filter
7.3
Adjusting the length of the fresh air pipe assembly
According to the installation environment, determine to adjust the length of fresh air pipe assembly.
7.3.1
Shorten the length
Cut the fresh air pipe to the appropriate length, keeping the section with the through‐wall pipe.
If it is necessary to cut the pipe, remember to insert it into the adapter securing it with some
glue.
Suitable length of fresh air pipe
Note:
1. The overlapping part of the adapter and the through‐wall pipe needs to be pressed flat with
tools and cannot be warped;
2. The adapter cannot be forced into the through‐wall pipe, otherwise it may cause the con‐
necting part to warp, and the distance between the round pipe end of the adapter and the
through‐wall pipe is ≥65mm;
7.3.2
Increase the length
Proceed as shown in the figure below:
Extension joint
Fresh air pipe for extension
Note:The number of bends of the fresh air pipe and the length of the pipe will affect the amount
of fresh air. It is recommended to use the mode 3 and avoid increasing the length of the fresh air
pipe when the installation conditions allow.
Crop line
Fresh air pipe
Crop line
Through‐wall pipe assembly
Adapter
Connect fresh air pipe, adapters, and through- wall
Through‐wall pipe assembly
Two‐pipe connection interface
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EN - 31
Through‐wall pipe assembly
Crop line
Through‐wall pipe
pipe
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