Thermal Insulation Work; Checking Of Device And Installation Conditions; Checks After Work Completion - Daikin LRLEQ5AY1 Manuel D'installation

*2 Refer to the instruction label on the front panel of the outdoor unit
(below) for the position of the service port.
Label
Gas side shutoff valve
Pressure-reducing valve
R410A
Meter
Used for refrigerant
replenishment
Connection procedure for gauge
manifold and vacuum pump
CAUTION
• Conduct an airtight test and vacuum drying precisely through the
service ports of both liquid and gas shutoff valves.
• Use charge hoses (provided with a pushing rod each) when using
the service ports.
In case of possible water intrusion into piping
Perform the above mentioned vacuum drying for 2 hours first in the
following cases:
The product is installed in the rainy season, there is a fear of dew
condensation resulting in the piping because the installation work
period is long, or there is a fear of rainwater intrusion into the piping
for other reasons.
Then impose a pressure of up to 0.05 MPa with nitrogen gas (for
vacuum destruction) and vacuum the unit down to –100.7 kPa or
below for 1 hour with a vacuum pump (for vacuum drying).
Repeat vacuum destruction and vacuum drying if the pressure does
not reach –100.7 kPa or below after a minimum of 2 hours' vacuum-
ing. Leave the vacuum state for 1 hour then, and check that the vac-
uum gauge reading will not rise.

8-2 Thermal Insulation Work

• Be sure to perform thermal insulation of the piping after the air-
tight test and vacuum drying.
• Be sure to perform the thermal insulation of the liquid and gas pipes
in the connecting piping. Otherwise, water leakage may result.
• Be sure to insulate liquid and gas connection piping. Failure to do
so may result in water leakage. Consult the following chart as a
general guide when selecting the insulation thickness.
• Liquid pipe arrival minimum temperature 0°C
Gas pipe arrival minimum temperature
–20°C (MT (Medium Temperature))
–40°C (LT (Low Temperature))
• Reinforce the insulation material for the refrigerant piping accord-
ing to the environment of thermal installation. Otherwise, the sur-
face of the insulation material may result in dew condensation.
14
Position of instruction label
Shutoff valve
service port
Liquid side
Charge
shutoff valve
hose
Valve
Outdoor unit
To indoor
unit
Vacuum pump
Note: Field pipings
• If the dew condensation water on the shutoff valves is likely to flow
to the indoor unit side through the clearance between the insula-
tion material and piping because the outdoor unit is installed
above the indoor unit or for some other reasons, perform appro-
priate treatment such as the caulking of the joints (see the illus-
trations below).
• Attach the cover of the piping outlet with a knock hole opened. If
there is a feature of small animals intruding through the piping
outlet, cover the piping outlet with a blocking material (field sup-
ply) on completion of the steps of "10. REFRIGERANT REPLEN-
ISHMENT" (see the illustrations below).
Use the piping outlet for jobs required during the steps of "10.
REFRIGERANT REPLENISHMENT" (e.g., a job of taking in the
charge hose).
Liquid side
shutoff valve
Gas side
shutoff valve
Indoor/Outdoor
interunit piping
Piping lead-out
hole lid
Open a knock
hole at
Note
• After knocking out the holes, we recommend you remove burrs in
the knock holes and paint the edges and areas around the edges
using the repair paint.

8-3 Checking of device and installation conditions

Be sure to check the followings.
<For those doing electrical work>
See "7-2 Procedure for Incoming Wiring".
1.
Make sure there is no faulty power wiring or loosing of a nut.
See "7-3 Procedure for Power Supply Wiring".
2.
Has the insulation of the main power circuit deteriorated?
Measure the insulation and check the insulation is above regular
value in accordance with relevant local and national regulations.
<For those doing pipe work>
1.
Make sure piping size is correct.
See "6-1 Selection of Piping Material".
2.
Make sure insulation work is done.
See "8-2 Thermal Insulation Work".
3.
Make sure there is no faulty refrigerant piping.
See "6. REFRIGERANT PIPING".
9.

CHECKS AFTER WORK COMPLETION

• Make sure the following works are complete in accordance with
the installation manual.
Piping work
Wiring work
Air tight test/Vacuum drying
Installation work for indoor unit
Coking, etc.
Insulation material
Block
Liquid side piping
Gas side piping
English