EN - 12
Fig. 13 Draining the exhaust into a
drainage basin
Fig. 14 Draining the exhaust into a
water drain (roof)
Exhaust
drain pipe
(3) Exhaust drain pipe work
Attach the included exhaust drain hose to the exhaust drain port (Fig. 11) and follow the precautions below in
performing plumbing work.
●
The exhaust drain hose comes packaged on the reverse side of the electrical box panel of the outdoor unit.
•
If connecting the outdoor unit’s exhaust drain to a covered drainage basin or gutter, or draining
multiple outdoor units to the same location, be sure to con
fi
gure the pipes (as shown in Fig. 13) so
that exhaust gases are discharged into open air. (Make sure that the opening in the receiving drain
pipe is at least 50A in nominal diameter.) Exhaust gases
fl
owing into the building or indoor/outdoor
units may result in poisoning or corrosion of the unit.
•
If a pipe is used for outdoor unit exhaust draining, do not use the same pipe for other purposes
(condensate draining for outdoor units, indoor unit draining, etc.). Exhaust gases
fl
owing into the
building or indoor/outdoor units may result in poisoning or corrosion of the unit.
•
If installing the outdoor unit on a roof, extend the exhaust drain pipe to the water drain (as shown in Fig. 14).
PROHIBITED: Do
not
install the drain pipes so they drain directly onto concrete surfaces,
waterproof sheets, or metal roo
fi
ng.
Doing so may result in discoloring of concrete and metal surfaces, damage to
waterproof sheets, holes, and other damage.
●
Fasten the exhaust drain hose (included) with a hose clamp.
If the exhaust drain hose leaks, it may cause corrosion to the equipment.
●
When installing the exhaust drain hose (included) and plumbing the exhaust drain water tube, take care that
it is not blocked from bending/smashing the exhaust drain hose.
If the exhaust drain hose is blocked, it will result in poor engine combustion and may lead to an equipment
breakdown.
Slope the drain pipe at a gradient of 1/50 or more, and do not taper the pipe diameter (Fig. 13, 14). In
addition, do not create any traps or peaks in the pipe.
If connecting multiple outdoor units to a single exhaust drain pipe, be sure to prevent exhaust gases from
fl
owing backward by allowing the gases to discharge into open air where the drain hose enters the drain pipe
(with the drain pipe opening at least 50A in nominal diameter). Exhaust gases
fl
owing back into the outdoor
units while they are stopped may result in starting failures, engine stalls, corrosion of the unit, and other
problems. In addition, take measures to prevent drain water from splattering in locations where wind is strong.
In cold regions where the exhaust drain pipe is likely to freeze, wrap heat tape or take other measures to
prevent freezing.
Use PVC or stainless steel tubing for the exhaust drain pipe.
As condensed water drips from the unit, be sure to install it in a location with good drainage. (Tubing for
the condensate drain port (Fig. 11) is not necessary, but follow the above precautions if tubing is installed.)
* Condensed water from the refrigerant tubing inside the unit is released through the condensate drain
port. Condensed water from the heat exchanger and water that gets inside the unit is released through
the drainage ports located at the center of either side panel.
Drainage
basin
Exhaust drain hose
Open to air
(opening at least 50A
in nominal diameter)
Downward slope of
1/50 or more
Exhaust drain
pipe
Water
drain
Exhaust drain hose
Open to air
(opening at least 50A
in nominal diameter)
Downward slope of
1/50 or more
00-Installation̲All.indb 12
00-Installation̲All.indb 12
2012/09/07 9:32:40
2012/09/07 9:32:40
