LG MULTI V ARNU243TTD4 Installation Manual

39
Installation Manual
Due to our policy of continuous product innovation, some specifications may change without notification.
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Condensate Pump Connection
Note the following when connecting the condensate pipe to the unit.
• Indoor units
DO NOT come with check valves or a backflow
prevention device. If check valves are needed, they must be field
supplied.
• The maximum lift of all condensate pumps is 27-9/16 inches (700
mm).
• Measure lift distance from the bottom surface of the indoor unit,
NOT from the condensate pipe connection.
Cassette Unit Drain Information
When the bottom surface of the indoor unit is at an elevation below
the receiving building drain line connection, install an inverted trap at
the top of the condensate pump discharge riser before connection to
the building drain pipe.
When the receiving drain line is mounted horizontally, connect the
inverted trap to the top half of the pipe. The connection point of the
inverted trap to the building drain pipe must always be to the top half
of the pipe and must
never be over 45° either side of the upper
most point of the horizontal building drain line.
If connecting to a vertical drain line or plumbing system vent line,
connect the IDU condensate pump discharge line using a Y-45 fitting
with the double end of the Y-45 fitting facing up. When connecting
to a vertical drain line include an inverted trap at the top of the IDU
condensate pump discharge riser before connection to the Y-45
fitting.
No Gravity Condensate Pipe Connection
Ceiling cassette indoor units do not have a gravity condensate pipe connection. There is a service drain plug on the bottom of each unit
under the decorative panel. This drain plug is intended as a service feature and is not to be used as a permanent gravity drain connection.
All ceiling cassette indoor units have a factory-mounted condensate
pump that runs continuously while the unit is in cooling mode. The
pump has an internal high-level float switch that stops the unit if the
water level in the pan rises too high.
All ceiling cassette units have a flexible drain hose kit and one or
two clamps. The hose can be used to connect the condensate pipe
to the condensate pump connection.
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Indoor Unit Drain Type
Drain Pipe Dia.
(OD / ID, in.)
One-Way Ceiling Cassette
27-9/16 in. (700 mm)
Max. Lift
Drain Pump,
Factory Installed
Ø1-1/4 / Ø1
Two-Way Ceiling Cassette
Four-Way Ceiling Cassette
Figure 28: Cassette Indoor Unit Drain Pump (Interior View).
1/50~1/100
slope
Hanger distance
3.3~4.9 feet
Hanger Bracket
Flexible drain hose
Insulation
Metal
clamp
Max.
11-13/16 inches
PVC Piping
PVC Elbow
Drain pump
Elbow
Drain pump
Indoor Unit
Drain pipe
(Field Supplied)
Insulation
(Field Supplied)
Figure 29: Ceiling Cassette Indoor Unit Drain Pump to Drain Piping
System.
GENERAL CONDENSATE PIPING
General Cassette Indoor Unit Condensate Piping

LG MULTI V ARNU243TTD4 Specifications

General

Brand	LG
Model	MULTI V ARNU243TTD4
Category	Air Conditioner
Language	English