Daikin RXQ18P7W1BA Installation Manual download pdf (Page 17)

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

RXYHQ12P8W1B + RX(Y)Q14~18P7W1BA

VRVIII System air conditioner

4PW48461-1

Installation manual

■ Vacuum drying: Use a vacuum pump which can evacuate to

–100.7 kPa (5 Torr, –755 mm Hg)

1. Evacuate the system from the liquid and gas pipes by using a

vacuum pump for more than 2 hours and bring the system to

–100.7 kPa. After keeping the system under that condition for

more than 1 hour, check if the vacuum gauge rises or not. If it

rises, the system may either contain moisture inside or have

leaks.

2. Following should be executed if there is a possibility of moisture

remaining inside the pipe (if piping work is carried out during the

raining season or over a long period of time, rainwater may enter

the pipe during work).

After evacuating the system for 2 hours, pressurize the system

to 0.05 MPa (vacuum break) with nitrogen gas and evacuate the

system again using the vacuum pump for 1 hour to –100.7 kPa

(vacuum drying). If the system can not be evacuated to

–100.7 kPa within 2 hours, repeat the operation of vacuum

break and vacuum drying.

Then, after leaving the system in vacuum for 1 hour, conﬁrm that

the vacuum gauge does not rise.

8. FIELD WIRING

8.1. Internal wiring – Parts table

Refer to the wiring diagram sticker on the unit. The abbreviations

used are listed below:

A1P~A7P ............ Printed circuit board

BS1~BS5 ............ Push button switch (mode, set, return, test, reset)

C1,C63,C66 ........ Capacitor

DS1,2 .................. Dip switch

E1HC~E3HC....... Crankcase heater

F1U ..................... Fuse (650 V, 8 A, B) (A4P) (A8P)

F1U,2U................ Fuse (250 V, 3.15 A, T) (A1P)

F5U ..................... Field fuse

F400U ................. Fuse (250 V, 6.3 A, T) (A2P)

H1P~8P............... Pilot lamp (service monitor - orange)

H2P:. Under preparation or in test operation when

blinking

H2P:. Malfunction detection when light up

HAP..................... Pilot lamp (service monitor - green)

K1........................ Magnetic relay

K2........................ Magnetic contactor (MIC)

K2M,3M.........*.... Magnetic contactor (M2C,M3C)

K1R,2R................ Magnetic relay (K2M,K3M)

K3R~5R .............. Magnetic relay (Y1S~Y3S)

K6R~9R .............. Magnetic relay (E1HC~E3HC)

L1R...................... Reactor

M1C~3C.............. Motor (compressor)

M1F,2F ................ Motor (fan)

PS ....................... Switching power supply (A1P,A3P)

Q1DI.................... Earth leakage breaker (ﬁeld supply)

Q1RP .................. Phase reversal detection circuit

R1T ..................... Thermistor (ﬁn) (A2P)

R1T ..................... Thermistor (air) (A1P)

R2T ..................... Thermistor (suction)

R4T ..................... Thermistor (coil-deicer)

R5T ..................... Thermistor (coil-outlet)

R6T ..................... Thermistor (liquid-pipe receiver)

R7T ..................... Thermistor (accumulator)

R10...................... Resistor (current sensor) (A4P) (A8P)

R31T~33T........... Thermistor (discharge) (M1C~M3C)

R50,59................. Resistor

R95...................... Resistor (current limiting)

S1NPH ................ Pressure sensor (high)

S1NPL................. Pressure sensor (low)

S1PH,3PH........... Pressure switch (high)

T1A...................... Current sensor (A6P,A7P)

SD1 ..................... Safety devices input

V1R ..................... Power module (A4P,A8P)

V1R,V2R ............. Power module (A3P)

X1A,X4A.............. Connector (M1F,M2F)

X1M..................... Terminal strip (power supply)

X1M..................... Terminal strip (control) (A1P)

X1M..................... Terminal strip (A5P)

Y1E,2E................ Expansion valve (electronic type) (main, subcool)

Y1S ..................... Solenoid valve (hotgas bypass)

Y2S ..................... Solenoid valve (oil return)

Y3S ..................... Solenoid valve (4 way valve)

Y4S ..................... Solenoid valve (injection)

Z1C-7C................ Noise ﬁlter (ferrite core)

Z1F...................... Noise ﬁlter (with surge absorber)

All ﬁeld wiring and components must be installed by a

licensed electrician and must comply with relevant local

and national regulations.

The ﬁeld wiring must be carried out in accordance with the

wiring diagrams and the instructions given below.

Be sure to use a dedicated power circuit. Never use a

power supply shared by another appliance. This can lead

to electric shock or ﬁre.

Be sure to install an earth leakage circuit breaker.

(Because this unit uses an inverter, install an earth

leakage circuit breaker that is capable of handling high

harmonics in order to prevent malfunctioning of the earth

leakage breaker itself.)

Do not operate until refrigerant piping work is completed.

(If operated before completion of the piping work, the

compressor may break down.)

Never remove a thermistor, sensor, etc., when connecting

power wiring and transmission wiring.

(If operated without thermistor, sensor, etc., the

compressor may break down.)

The reversed phase protection detector of this product only

functions when the product starts up. Consequently,

reversed phase detection is not performed during normal

operation of the product.

The reversed phase protection detector is designed to stop

the product in the event of an abnormality when the

product is started up.

Replace two of the three phases (L1, L2, and L3) during

reverse-phase protection circuit operation.

If the possibility of reversed phase exists after a

momentary blackout and the power goes on and off while

the product is operating, attach a reversed phase

protection circuit locally. Running the product in reversed

phase can break the compressor and other parts.

Means for disconnection must be incorporated in the ﬁeld

wiring in accordance with the wiring rules.

(An all-pole disconnection switch must be available on the

unit.)

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Daikin RXQ18P7W1BA Installation Manual Page 17

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