installing the unit
REFRIGERANT PIPING WORKS
Connecting the outdoor unit pipe
Caution for connecting the pipe
•
When connecting the pipe to the unit, the unit may get damaged by a welding fire and a flame.
Use a flame proofing cloth to protect the unit from a welding fire or flame.
Ambient air temperature sensor for detecting outside temperature is located on the left side of
the welding part. Make sure not to damage the temperature sensor when welding it.
•
The O-ring and Teflon packing inside service valve may get damaged by a welding fire. Wrap the
bottom side of the service valve with a wet cloth and weld it as shown above. Make sure not to
interrupt the welding with the drops of the wet cloth.
•
The connecting pipes of liquid side and gas side should not contact each other.
Vibration may cause a damage to the pipes.
Heat Pump Connection from front side
Connection from bottom at the
left/right side
Working process
• First, remove the cover from unit.
• Separate the knock-out hole to use.
If the hole is open, small animals such as
squirrels and rats may get into the unit
through the hole and the unit may be
damaged.
• Fix the pipe cover of bottom side and fix
the pipe cover of upper side thereafter.
• Separate the knock-out hole at the
bottom side of the unit and install
the pipe.
• After installing and insulating the pipe,
close up the remaining gap. If the gap is
remain open, small animals such as rats
and squirrels may get inside the unit and
cause damage to the unit.
Single
installation
Combination
installation
Gas side
pipe
Liquid side
pipe
Oil
balancing
valve
Gas side
pipe
Oil
balancing
valve
Liquid
side pipe
Knock-out
hole
Gas side
pipe
Liquid side
pipe
Oil
balancing
valve
Gas side
pipe
Oil
balancing
valve
Liquid side
pipe
Knock-out
hole
CAUTION
DVM PLUS3_IM_E_31180-1.indd 24 2009-10-16 ｿﾀﾈﾄ 2:10:24
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