Refrigerant Pipe Size And Allowable Pipe Length; Selection Of Piping Material; Allowable Pipe Length And Height Difference; Precautions On Refrigerant Piping - Rotex RRHQ011AAV3 Manual De Instalación

About 100 mm is required as the dimension for laying the upper
outdoor unit's drain pipe. Get the portion A sealed so that air from the
outlet does not bypass.
(C) In case of multiple-row installation (for roof top use, etc.)
1. In case of installing one unit per row.
≥1000
2. In case of installing multiple units (2 units or more) in lateral
connection per row.
H
Relation of dimensions of H, A and L are shown in the table below.
L
0<L≤1/2H
L≤H
1/2H<L
H<L Installation impossible
R
EFRIGERANT PIPE SIZE AND ALLOWABLE PIPE
LENGTH
All field piping must be installed by a licensed refrigeration
technician and must comply with relevant local and
national regulations.
To persons in charge of piping work:
Be sure to open the stop valve after piping installing
and vacuming is complete. (Running the system with
the valve closed may break the compressor.)
It is forbidden to discharge refrigerant into the
atmosphere. Collect the refrigerant in accordance
with the freon collection and destruction law.

Selection of piping material

Construction material: phosphoric acid deoxidised seamless
copper for refrigerant.
Temper grade: use piping with temper grade in function of the
pipe diameter as listed in table below.
The pipe thickness of the refrigerant piping should comply with
relevant local and national regulations. The minimal pipe
thickness for R410A piping must be in accordance with the table
below.
Temper grade
Pipe Ø of piping material
9.5 O
15.9 O
O=Annealed
Installation manual
5
≥100
≥2000
≥200
L
A
≥3000
≥600
≥1500
A
250
300
Minimal thickness t (mm)
0.80
1.00
Refrigerant pipe size
The pipes between outdoor unit and indoor unit should have the
same size as the outdoor connections.
Gas pipe
Liquid pipe

Allowable pipe length and height difference

See the table below concerning lengths and heights. Refer to
figure 2. Assume that the longest line in the figure corresponds with
the actual longest pipe, and the highest unit in the figure corresponds
with the actual highest unit.
Allowable pipe length
Allowable pipe length
Maximum total one-way piping length
L
Maximum height between indoor and outdoor
H
Chargeless length
L
(a) Parenthesized figure represents the equivalent length.
P
RECAUTIONS ON REFRIGERANT PIPING
Do not allow anything other than the designated refrigerant to
get mixed into the freezing cycle, such as air, etc. If any
refrigerant gas leaks while working on the unit, ventilate the
room thoroughly right away.
Use R410A only when adding refrigerant
Installation tools:
Make sure to use installation tools (gauge manifold charge hose,
etc.) that are exclusively used for R410A installations to
withstand the pressure and to prevent foreign materials (e.g.
mineral oils and moisture) from mixing into the system.
In order to prevent dirt, liquid or dust from entering the piping,
cure the piping with a pinch or taping.
Place Installation period
More than a month
Outdoor unit
Less than a month
Regardless of the
Indoor unit
period
Great caution is needed when passing copper tubes through
walls.
Piping should be mounted so that the flare is not subjected to
mechanical stress.
RRHQ0011~016AAV3(8) + RRHQ011~016AAW18
Refrigerant pipe size (mm)
Ø15.9
Ø9.5
V3 W1
(a)
75 m (95 m)
30 m
≤30 m ≤10 m
Protection method
Pinch the pipe
Pinch or tape the pipe
Outdoor unit for air to water heat pump
4PW50202-1