Daikin RXQ18P7W1BA Installation Manual download pdf (Page 23)

RX(Y)Q5-10-12P7W1B + RXQ8P7W1B + RXYQ8P8W1B +

RXYHQ12P8W1B + RX(Y)Q14~18P7W1BA

VRVIII System air conditioner

4PW48461-1

Installation manual

9. PIPE INSULATION

After ﬁnishing the leak test and vacuum drying, the piping must be

insulated. Take into account the following points:

■ Make sure to insulate the connection piping and refrigerant

branch kits entirely.

■ Be sure to insulate liquid and gas piping (for all units).

■ Use heat resistant polyethylene foam which can withstand a

temperature of 70°C for liquid side piping and polyethylene foam

which can withstand a temperature of 120°C for gas side piping.

■ Reinforce the insulation on the refrigerant piping according to

the installation environment.

Condensation might form on the surface of the insulation.

■ If there is a possibility that condensation on the stop valve might

drip down into the indoor unit through gaps in the insulation and

piping because the outdoor unit is located higher than the indoor

unit this must be prevented by sealing up the connections. See

ﬁgure 9.

■ For cooling only units, insulation which can withstand 70°C is

also sufﬁcient for gas side piping.

10. CHECKING OF UNIT AND INSTALLATION

CONDITIONS

Be sure to check the following:

The piping work

1 Make sure piping size is correct.

See "6.2. Selection of piping material" on page 5.

2 Make sure insulation work is done.

See "9. Pipe insulation" on page 18.

3 Make sure there is no faulty refrigerant piping.

See "6. Refrigerant piping" on page 5.

The electrical work

1 Make sure there is no faulty power wiring or loose nuts.

See "8. Field wiring" on page 12.

2 Make sure there is no faulty transmission wiring or loose nuts.

See "8. Field wiring" on page 12.

3 Make sure the insulation resistance of the main power circuit is

not deteriorated.

Using a megatester for 500 V, check that the insulation

resistance of 2 MΩ or more is attained by applying a voltage of

500 V DC between the power terminals and earth. Never use

the megatester for the transmission wiring (between outdoor

and indoor unit, outdoor and COOL/HEAT selector, etc.).

11. CHARGING REFRIGERANT

The outdoor unit is factory charged, but depending on the length of

the piping when installed, the outdoor unit may require additional

charging.

For charging the additional refrigerant follow the procedure as

described in this chapter.

11.1. Important information regarding the

refrigerant used

This product contains ﬂuorinated greenhouse gases covered by the

Kyoto Protocol. Do not vent gases into the atmosphere.

Refrigerant type: R410A

GWP

(1)

value: 1975

(1)

GWP = global warming potential

Please ﬁll in with indelible ink,

■➀ the factory refrigerant charge of the product,

■➁ the additional refrigerant amount charged in the ﬁeld and

■➀+➁ the total refrigerant charge

on the ﬂuorinated greenhouse gases label supplied with the product.

The ﬁlled out label must be adhered on the inside of the product and

in the proximity of the product charging port (e.g. on the inside of the

service cover).

(2)

In case of multiple outdoor systems, only 1 label must be adhered,

mentioning the total factory refrigerant charge of all outdoor units

connected on the refrigerant system.

Ambient temperature Humidity Minimum thickness

≤30°C 75% to 80% RH 15 mm

>30°C ≥80 RH 20 mm

1 Gas line stop valve

2 Liquid line stop valve

3 Service port for adding refrigerant

4 Sealing up treatment

5 Insulation

6 Indoor -outdoor interconnection piping

Be sure to insulate local pipes, as touching them can

cause burns.

Refrigerant can not be charged until all ﬁeld wiring and

ﬁeld piping has been completed.

Refrigerant may only be charged after performing the leak

test and the vacuum drying.

The refrigerant charge of the system must be less than

100 kg. This means that in case the calculated refrigerant

charge is equal to or more than 95 kg you must divide your

multiple outdoor system into smaller independent systems,

each containing less than 95 kg refrigerant charge.

For factory charge, refer to the unit name plate.

NOTE

National implementation of EU regulation on certain

ﬂuorinated greenhouse gases may require to provide

the appropriate ofﬁcial national language on the unit.

Therefore, an additional multilingual ﬂuorinated

greenhouse gases label is supplied with the unit.

Sticking instructions are illustrated on the backside of

that label.

1 factory refrigerant

charge of the product:

see unit name plate

(2)

2 additional refrigerant

amount charged in the

ﬁeld

3 total refrigerant charge

4 Contains ﬂuorinated

greenhouse gases

covered by the Kyoto

Protocol

5 outdoor unit

6 refrigerant cylinder

and manifold for

charging

1 2 ... 18 19 20 21 22 23 24 25 26 27 28 ... 37 38

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Daikin RXQ18P7W1BA Installation Manual Page 23

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