Placing The Unit; Refrigerant Piping - Daikin LRLEQ5AY1 Manuel D'installation

6 Opening (small)
Used for size 8A, 10A, 12A, 15A, or 20A
3.
After installation, remove the transportation clasp (yellow)
attached to the large openings.
Note
Apply a filler cloth on a fork to prevent coating of the bottom frame
from coming off and rust from occurring when bringing in the unit with
anti-corrosion treatment type using a forklift.
5.

PLACING THE UNIT

• Make sure the unit is installed level on a sufficiently strong base to
prevent vibration and noise.
• The base should be bigger around than the width of the unit's legs
(66 mm), and should support the unit.
If protective rubber is to be attached, attach it to the whole face of
the base.
• The height of the base should be at least 150mm from the floor.
• Secure the unit to its base using foundation bolts. (Use four com-
mercially available M12-type foundation bolts, nuts, and washers.)
• The foundation bolts should be inserted 20 mm.
Corner-hole Independent
foundation
foundation
Not required
for size
5A or 6A
Center of the product
The corner-hole foundation that secures the unit with the holes on the
four corners is not available to size 8A, 10A, 12A, 15A, 20A.
The corner-hole foundation, however, is available to size 5A and 6A.
Base form
A
B
Model
5A · 6A type
8A · 10A · 12A type
15A · 20A type
Base width and base bolt positions
Note
• When installing on a roof, make sure the roof floor is strong
enough and be sure to water-proof all work.
• Make sure the area around the machine drains properly by setting
up drainage grooves around the foundation.
Drain water is sometimes discharged from the outdoor unit when
it is running.
English
Beam Beam
foundation foundation
(horizontal) (vertical)
Not required
for size
5A or 6A
Center of the product
Foundation bolt point
(4-15 × 22.5)
(Unit : mm)
A B
635 497
930 792
1240 1102
• If the condensing unit is of brine dam-
age resistant or heavy brine damage
resistant type, use nuts provided with
resin washers to secure the product to
the foundation bolts (see the illustra-
tion on the right-hand side).
The rustproof effect of the nut will be lost if the coatings on the
tightening portions of the nuts come off.
6.

REFRIGERANT PIPING

To Piping Work Contractors
• Never open the shutoff valve until the steps specified in "7. FIELD
WIRING" and "8-3 Checking of device and installation condi-
tions" of piping.
• Do not use flux at the time of brazing and connecting refrigerant
pipes. Use phosphorous copper brazing filler metal (BCuP-2),
which does not require flux. Chlorine-based flux causes piping
corrosion. Furthermore, if fluoride is contained, the flux will have
adverse influences on the refrigerant piping line, such as the dete-
rioration of refrigerating machine oil.
CAUTION
• All field piping must be installed by a licensed refrigeration tech-
nician and must comply with relevant local and national regula-
tions.
[Precautions for reuse of existing refrigerant piping / heat
exchangers]
Keep the following points in mind for the reuse of existing refrig-
erant piping / heat exchangers.
A malfunction may result if there is deficiency.
• Do not use the existing piping in the following cases. Perform new
piping instead.
• The piping is different in size.
• The strength of the piping is insufficient.
• The compressor of the condensing unit previously used caused
a malfunction.
An adverse influence of residual substances, such as the oxi-
dation of refrigerant oil and the generation of scale, is consid-
ered.
• If the indoor unit or outdoor unit is disconnected from the piping
for a long time.
The intrusion of water and dust into the piping is considered.
• The copper pipe is corroded.
• The refrigerant of the condensing unit previously used was
other than R410A (e.g., R404A / R507 or R407C).
The contamination of the refrigerant with heterogeneity is con-
sidered.
• If there are welded connections midway on the local piping, make
gas leakage checks on the welded connections.
• Be sure to insulate the connection piping.
The liquid and gas pipe temperatures are as follows:
Liquid pipe arrival minimum temperature: 0°C
Gas pipe arrival minimum temperature:
–26°C (Refrigeration Series)
–46°C (Freezer Series)
In the case of thickness insufficiency, add additional insulation
material or renew the existing insulation material.
• Renew the insulation material if the insulation material is
degraded.
Keep the following points in mind for the reuse of existing heat
exchangers
• Units with insufficient design pressure (since this product is an
R410A unit) require a lower-stage design pressure of 2.5 MPa
[25 bars].
• Units for which the path to the heat exchanger has been routed so
that the flow of refrigerant is from bottom to top
• Units with copper tubing or fan corrosion
• Units that may be contaminated with foreign matter such as rub-
bish or other dirt
Resin
washers
5