Daikin LRYEQ-AY - Инструкция по эксплуатации - Страница 20

Installation manual

17

LRYEQ16A7Y1

CONVENI-PACK

4P448939-1A – 2016.07

*2  Refer to the instruction label on the front panel of the outdoor unit 

(below) for the position of the service port.

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 fol-
lowing cases:
The product is installed in the rainy season, there is a fear of dew con-
densation 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’ vacuuming. 
Leave the vacuum state for 1 hour then, and check that the vacuum 
gauge reading will not rise.

9-2 Thermal Insulation Work

• Be sure to perform thermal insulation of the piping after the airtight 

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

20°C (Air-conditioning side)
  5°C (Refrigeration side)

Gas pipe arrival minimum temperature

    0°C (Air-conditioning side)
–20°C (Refrigeration side)

• 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.

• If the dew condensation water on the shutoff valves is likely to flow 

to the indoor unit side through the clearance between the insulation 
material and piping because the outdoor unit is installed above the 
indoor unit or for some other reasons, perform appropriate treat-
ment such as the caulking of the joints (see the illustrations 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 out-
let, cover the piping outlet with a blocking material (field supply) on 
completion of the steps of "11. REFRIGERANT REPLENISH-
MENT" (see the illustrations below).
Use the piping outlet for jobs required during the steps of "11. 
REFRIGERANT REPLENISHMENT" (e.g., a job of taking in the 
charge hose).

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.

9-3 Checking of Device and Installation Conditions

Be sure to check the followings.

<For those doing electrical work>
See "8-3 Procedure for Incoming Wiring".

1.

Make sure there is no faulty power wiring or loosing of a nut.
See "8-4 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 and Size".

2.

Make sure insulation work is done. 
See "9-2 Thermal Insulation Work".

3.

Make sure there is no faulty refrigerant piping.
See "6. REFRIGERANT PIPING".

Position of instruction label

Label

Pressure-reducing valve

Nitrogen

Used for refrigerant 
replenishment

Tank

(with siphon)

Meter

Vacuum pump

Field pipings

Note:

Connection procedure for gauge 
manifold and vacuum pump

R410A

To Air-conditioning
indoor unit 

To Refrigeration
indoor unit

Shutoff valve
service port

Liquid side
shutoff valve

Outdoor unit

Gas side
shutoff valve

Valve

Charge 
hose

Liquid side 
shutoff valve

Gas side 
shutoff valve

Indoor/Outdoor 
interunit piping

Insulation material

Caulking, etc.

Liquid side piping

Block 

Gas side piping

Open a knock 
hole at

Piping lead-out 
hole lid

4PEN448939-1A.book  Page 17  Monday, September 5, 2016  7:12 PM