Panasonic 2WAY Multi U-16GE3E5 Manuel D'installation page 6

(3) In snowy regions, be sure to install a snow-protection hood and enclosure.
Even in regions that do not have heavy snowfall, install a snow-protection roof (such as a snow hood) if
the unit is installed in a location where snow may build up and fall from the building's roof or other surface
onto the unit. (Install the hood so that the coolant supply opening at the top of the unit can be used.)
(4) Take care that operating noise and exhaust do not disturb neighboring buildings or homes.
In particular, install so that noise-related local environmental standards, if any, are satisfied at the border
with a neighboring dwelling.
(5) Because this gas heat pump A/C may affect other electrical devices with noise, give due consideration
when installing AC units (both indoors and outdoors) at enough distance (at least 3 m) from the main
unit of TVs, radios, stereos, intercoms, PCs, word processors, telephones, etc., as well as their antenna
cables, signal wires, power cords, etc.
(6) Select an installation location so that the length of refrigerant tubing is within the ranges shown in the
table below.
Warnings (Same for All Models)
*Always use R410A branch tubes (sold separately) when running branching tubes.
1. Warnings about using branch tubes (
parts sold separately, so be sure to
refer to those materials.
2. When using a T-tee branch tube
(provided by installer) (only with L3 at
2 m or less), the main tubing must be
either level or vertical. The openings
of each branch tube must be at a
raised angle from the ground when
the main tubing is level. The openings
can be set at any angle when the main
tubing is vertical, but be sure to curve
a portion of the connected tubing
upward. Always close weld the end point of the T-tee tubing. In addition, pay special attention to the
insertion dimensions for each connected tube so that refrigerant flow is not blocked at the T-tee branches.
Be sure to use only standard T-tees.
3. Do not use off the shelf Y-joints (
2WAY Multi Models
Table 1-1 System limitations
450
Equivalent
16
Horsepower
Ratio of capacity
for indoor unit to
outdoor units
Minimum capacity
of indoor units
that can be
connected
Maximum number
of indoor units
that can be 26
connected (per
system)
) and header tubes sold separately will come packaged with the
Outdoor
Indoor
Fig. 3 Main tube (horizontal)
) for liquid tubes (branch tubes (made on site)).
560 710 850 450×2
20 25 30 32
50 – 200%
Type 22 or greater (equivalent to 0.8 horsepower)
33 41 50 52
Indoor
Level line
Raised angle
(15 to 30 degrees)
Indoor Closed weld
450+560 560×2 450+710 560+710
36 40 41
Min: Across the system, a minimum outdoor unit capacity of 50%
Max: Total capacity of 130% with 2 outdoor units
59
EN - 6
Closed weld
Any angle
Indoor
Indoor
L3<2m
Outdoor
Fig. 4 Main tube (vertical)
710×2 710+850
45 50 55
64
850×2
60