Refrigerant Pipe Size And Allowable Pipe Length; Selection Of Piping Material; Refrigerant Pipe Size; Allowable Pipe Length And Height Difference - Daikin Altherma ERHQ014BAV3 Installation Manual

8. R
EFRIGERANT PIPE SIZE AND ALLOWABLE
PIPE LENGTH
DANGER
Piping and other pressure containing parts shall
comply with the applicable legislation and shall be
suitable for
deoxidised seamless copper for refrigerant.
Installation shall be done by a licensed refrigerant
technician, the choice of materials and installation
shall comply with applicable legislation. In Europe the
EN378 is the application standard that shall be used.
NOTICE
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.

8.1. 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
applicable legislation. 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

8.2. Refrigerant pipe size

The pipes between outdoor unit and indoor unit should have the
same size as the outdoor connections.
Gas pipe
Liquid pipe
Installation manual
13
refrigerant. Use phosphoric
Minimal thickness t (mm)
0.80
1.00
Refrigerant pipe size (mm)
Ø15.9
Ø9.5

8.3. Allowable pipe length and height difference

See the table below concerning allowable 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.
For ERHQ only
acid
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.
For ERLQ only
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.
V3
(a)
75 m (95 m)
30 m
≤30 m
V3
(a)
50 m (70 m)
30 m
≤10 m
ERHQ011~016BAV3+W1 + ERLQ011~016CAV3+W1
Outdoor unit for air to water heat pump
4PW57794-1 – 08.2010
W1
≤10 m
W1