20
OUTDOOR UNIT INSTALLATION
ENGLISH
CAUTION
• Extend the drain pipes to a gutter(water outlet) for drainage. A direct drainage to the sur-
face of waterproof sheets or concrete causes contamination or damage.
• Take preventive measures to protect the drain pipes from freezing in winter.
!
• When connecting the rubber drain hose of the outdoor unit to the pipe for drainage, make
sure to lay pipes exposed(released) to the air. If the exhaust gas flows backward inside a
building, it causes a carbon dioxide poisoning.
• Do not use the indoor unit drain pipes mixed with the outdoor unit drain pipes.
If the exhaust gas flows backward inside a building through the indoor unit drain pipes, it
causes a carbon dioxide poisoning.
WARNING
!
• The drain piping work should be done with a falling gradient of more than 1/50 for better
drainage. Do not add any shaft tubes to the drain pipes. Do not add any traps to the drain pipes.
If the multiple indoor units share the same drain pipe, keep the each rubber hose open to the
air. Otherwise, the exhaust gas from the outdoor unit in operation could flow backward into the
indoor unit (not in operation) and cause an engine malfunction.
• Use the corrosion-free hardened Polyvinyl Chloride (PVC) or stainless tubes for the drain piping.
Drainage
Exhaust Gas Drain hose
Space for some air
Ex : (pipe size more than 50A)
Hardened PVC or SUS tube
Falling gradient of 1/50
Outdoor Unit Drainage Piping
Summary of Contents for GP-W500B6C
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