Introduction; Combination; Standard Supplied Accessories; Optional Accessories - Panasonic U-4ML3DPQ Manual De Instalación

2. I
NTRODUCTION

2.1. Combination

The indoor units can be installed in the following range.
Always use appropriate indoor units compatible with R-410A.
To learn which models of indoor units are compatible with
R-410A, refer to the product catalogs.
Total capacity/quantity of indoor units
Total capacity of
Outdoor unit
U-4ML3
U-5ML3
U-6ML3

2.2. Standard supplied accessories

(*)
Gas line piping (1) + copper gasket
Gas line piping (2)(*)
Gas line piping (3)(*)
Installation manual
Operation manual
(*) Only for U-6ML3.
Location of accessories: refer to figure 1.
1 Accessories

2.3. Optional accessories

To install the above outdoor units, the following optional parts are
also required.
Refrigerant branching kit (for R-410A only: Always use an
appropriate kit dedicated for your system.)
Refnet header
CZ-P29HK12Q
To select an optimum refrigerant branching kit, refer to "Refrigerant
branch kit selection" on page 9.
2.4. Technical and electrical specifications
Refer to the Engineering Data Book for the complete list of
specifications.
U-4~6ML3DPQ
Urban Multi air conditioner
4PW17809-1C
Total quantity of
indoor units indoor units
50~130 6
62.5~162.5 8
70~182 9
1
+
1
1
1
1
Refnet joint
CZ-P20BK12Q
3. B
EFORE INSTALLATION
Since design pressure is 3.8 MPa or 38 bar, pipes of larger
wall thickness may be required. Refer to paragraph
"7.1. Selection of piping material" on page 6.

3.1. Precautions for R-410A

The refrigerant requires strict cautions for keeping the system
clean, dry and tight.
- Clean and dry
Foreign materials (including mineral oils or moisture) should be
prevented from getting mixed into the system.
- Tight
Read "8. Precautions on refrigerant piping" on page 6 carefully
and follow these procedures correctly.
Since R-410A is a mixed refrigerant, the required additional
refrigerant must be charged in its liquid state. (If the refrigerant
is in state of gas, its composition changes and the system will
not work properly).
The connected indoor units must be indoor units designed
exclusively for R-410A.

3.2. Installation

For installation of the indoor unit(s), refer to the indoor unit
installation manual.
Never operate the air conditioner with the discharge pipe
thermister (R3T), suction pipe thermister (R2T) and pressure
sensors (S1NPH, S1NPL) removed. Such operation may burn
out the compressor.
Be sure to confirm the model name and the serial no. of the
outer (front) plates when attaching/detaching the plates to avoid
mistakes.
When closing the service panels, take care that the tightening
torque does not exceed 4.1 N•m.

3.3. Handling

As shown in the figure, bring the unit slowly by grabbing the left and
right grips.
Place your hands on the corner instead of holding the suction inlet in
the side of the casing, otherwise the casing could be deformed.
Take care not to let hands or objects come in contact with
rear fins.
Installation manual
3