A.O. Smith AH - 290, Инструкция по установке, эксплуатации и обслуживанию

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It is also possible to use other tight air traps, like a tube with one turn.
If mounting of the air trap is omitted, water damage or
damage to the heat pump can arise! If the air trap is not
correctly mounted, the warranty will not apply!
3.4 Air intake and exhaust
Make sure that there is sufficient free space around the heat pump.
Place the inlet on the back side of the product, and the outlet on the front
side of the product.
The following applies:
1. Min. distance from the floor to the ceiling: 2,1 m
2. Placing as shown on the picture (placing in a recess):
C min = B min = 500 mm; A min = 200 mm
3. If C>1 m (placing in a corner): A min = B min = 200 mm
4. If C>1 m and B>1 m (placing at the wall): A min = 200 mm
The inlet air may not be polluted with aggressive components (ammonia,
sulphur, chlorine, etc.). Parts in the system may be damaged.
The inlet and exhaust ducts, on the top of the heat pump, must not be
covered! There may not be any abnormal admission in the air.
3.5 Checking
After the installation, it is recommended that the checks be performed to
ensure that the connections are sealed and that the drainage of the
condensation water is unobstructed.
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