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Pipes Connection
Main Pipes Connection
Check if the diameter of the water pipes is adequate for the actual length of the piping and not less than the diameter
of the connection on the unit.
When connecting the water pipes to the coil, do not damage the coil manifold.
Hold the coil connections firm with spanner to avoid damaging them.
Condensate Water Pipe Connection
The unit is fitted with a gravity drainage condensate drain pan with an open connection at the back.
The pipe should have an internal diameter of at least 16 mm.
The drain connection has an external diameter of 18 mm.
Connect the condensate drain hose to the pan outlet with a hose clip.
Make sure the drain pipe has a slope of at least 2 cm/m without obstructions or bottlenecks.
Fit a siphon if necessary which prevents air being sucked up by the drain hose.
Connect the condensate drain pipe to a rainwater drainage system.
Do not connect to the sewage system as odors may be sucked up if the water in the siphon evaporates.
Pour water into the pan and check if any leakage.
Air Purging
After connecting the water inlet and outlet pipes, turn on the main breaker.
Open the water inlet valve and flood the coil.
Check all connections for water leakage.
If no leakage, open the air vent valve with an open-end wrench.
Purge the air trapped inside the coil. (Do not touch the electrical parts.)
Close the air vent valve when no bubbles appear.
Open the water outlet valve.
Caution
Gravity drainage may be converted into forced drainage by fitting the condensate drain pump available
as an accessory.
Page 16 of 48
SK2019 EU FDHD-V/P-AC-001
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