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REYQ8~16P8Y1B
VRVIII System air conditioner
4PW39996-1B

Installation manual

9

7.

L

EAK

 

TEST

 

AND

 

VACUUM

 

DRYING

The units were checked for leaks by the manufacturer.

After connecting the field piping, perform the following inspections.

1

Preparations

Referring to 

figure 22

, connect a nitrogen tank, a refrigerant tank

and a vacuum pump to the outdoor unit and perform the leak
test and the vacuum drying.
The refrigerant tank and the charge hose connected to the
refrigerant charge port or valve A are needed to perform
refrigerant charging.

2

Leak test and vacuum drying

Leak test:

Pressurize the liquid pipe, the suction gas pipe and the high
pressure/low pressure gas pipe from the service ports of each
stop valve to 4.0 MPa (40 bar) (do not pressurize more than
4.0 MPa (40 bar)). If the pressure does not drop within 24 hours,
the system passes the test. If the pressure drops, check where
the nitrogen leaks from.

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 pipe, the suction gas pipe
and the high pressure/low pressure gas pipe stop valve service
ports 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 cannot 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.

F

IELD

 

WIRING

1

Gauge manifold

2

Nitrogen

3

Measuring instrument

4

Refrigerant R410A tank (siphon system)

5

Vacuum pump

6

Charge hose

7

Refrigerant charge port

8

High pressure/low pressure pipe stop valve

9

Suction gas pipe stop valve

10

Liquid pipe stop valve

11

Valve A

12

Valve B

13

Valve C

14

Outdoor unit

15

To BS unit or indoor unit

16

Stop valve

17

Service port

18

Field piping

19

Gas flow

NOTE

Make sure to perform leak test and
vacuum drying using the service ports
of the stop valves of the high pressure/
low pressure gas pipe, suction gas
pipe and liquid pipe. (For the service
port location, refer to the "Caution"
label attached on the front panel of the
outdoor unit.)

See 

"11.3. Stop valve operation procedure" on

page 15

 for details on handling the stop valve.

To  prevent entry of any contamination and to
prevent insufficient pressure resistance, always
use the special tools dedicated for working with
R410A refrigerant.

NOTE

Make sure to use nitrogen gas. 

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 consequently 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 there exists the possibility of reversed phase after an
momentary black out 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.)

Содержание REYQ8P8Y1B

Страница 1: ...INSTALLATION MANUAL REYQ8P8Y1B REYQ10P8Y1B REYQ12P8Y1B REYQ14P8Y1B REYQ16P8Y1B System air conditioner...

Страница 2: ...m e 100 mm f 500 mm 4 a 10 mm b 300 mm c 10 mm d 500 mm e 20 mm a 50 mm b 100 mm c 50 mm d 500 mm e 100 mm 1500 500 13 2 1 6 3 4 6 5 6 9 10 7 8 2 1 A B C 5 3 2 1 6 4 3 4 2 b a c d A C B D a e b d e A...

Страница 3: ...jeidemme mukaisesti 14 za p edpokladu e jsou vyu v ny v souladu s na imi pokyny odpov daj n sleduj c m norm m nebo normativn m dokument m 15 u skladu sa slijede im standardom ima ili drugim normativni...

Страница 4: ...ujam temperat ra TS TSmin Minim l temperat ra zem spiediena pus L C TSmax Pies tin t temperat ra saska ar maksim lo pie aujamo spiedienu PS M C Dzesin t js N Spiediena dro bas ier ces iestat ana P bar...

Страница 5: ...ging from 25 0 to 50 0 kW For changing the refrigerant flow to indoor units the REYQ P system can be combined with BS units of the types BSVQ100P BSVQ160P and BSVQ250P only Other BS unit types will ca...

Страница 6: ...he Engineering Data Book Outdoor unit Total capacity of indoor units REYQ8 100 260 REYQ10 125 325 REYQ12 150 390 REYQ14 175 455 REYQ16 200 520 NOTE If the total capacity of the connected indoor units...

Страница 7: ...nt concentration from exceeding allowable safety limits in the event of a refrigerant leak 11 To prevent dripping water to form a puddle underneath the unit install a drain pan available as option kit...

Страница 8: ...foundation dimension 7 Distance between foundation bolt holes X Not allowed O Allowed units mm Prepare a water drainage channel around the foundation to drain waste water from around the unit If the...

Страница 9: ...the pipe size nearest to the required size use the suitable adapters for the change over from inch to mm pipes field supply 6 3 Pipe connection Be sure to perform a nitrogen blow when brazing and to r...

Страница 10: ...the system Great caution is needed when passing copper tubes through walls Block all gaps in the holes for passing out piping and wiring using sealing material field supply The capacity of the unit wi...

Страница 11: ...outdoor unit side choose from the following table in accordance with the capacity of the outdoor unit example refnet joint A How to select the refnet header Choose from the following table in accordan...

Страница 12: ...igerant branch kit to indoor units is 40 m or less however it can be extended up to 90 m if all the following conditions are fulfilled Required conditions Example drawings It is necessary to increase...

Страница 13: ...Valve B 13 Valve C 14 Outdoor unit 15 To BS unit or indoor unit 16 Stop valve 17 Service port 18 Field piping 19 Gas flow NOTE Make sure to perform leak test and vacuum drying using the service ports...

Страница 14: ...2 liquid 2 H E liquid 2 R10 Resistor current sensor R31T R32T Thermistor discharge M1C M2C R50 R59 Resistor R90 Resistor current sensor R95 Resistor current limiting S1NPH Pressure sensor high S1NPL...

Страница 15: ...d interfering with other devices The outer casing of the product may take on an electrical charge due to leaked electrical current which will have to be discharged with the grounding Be sure to instal...

Страница 16: ...of the transmission wiring terminals 1 Electric wiring diagram Printed on the back of the electric component box lid 2 Power wiring and ground wiring inside conduit When the wiring is routed out throu...

Страница 17: ...iquid pipe 2 High pressure low pressure gas pipe 3 Finishing tape 4 Suction gas pipe 5 Transmission wiring 6 Insulation material 1 Power supply 380 415 V 3 N 50 Hz 2 Earth leakage breaker 3 Fuse 4 Gro...

Страница 18: ...6 Refrigerant piping on page 4 The electrical work 1 Make sure there is no faulty power wiring or loose nuts See 8 Field wiring on page 9 2 Make sure there is no faulty transmission wiring or loose nu...

Страница 19: ...t cannot 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 Charge the liquid refrigerant with t...

Страница 20: ...tem charging over the permissible quantity can cause liquid hammer Always use protective gloves and protect your eyes when charging refrigerant When the refrigerant charging procedure is done or when...

Страница 21: ...indoor temperature The unit will automatically select the cooling mode or heating mode for charging Outdoor temperature 0 C DB 43 C DB Indoor temperature 10 C DB 32 C DB Total indoor unit capacity 80...

Страница 22: ...and may cause overcharging 7 Ready Press the button once within 5 minutes If the button is not pushed within 5 minutes P2 will be displayed on the remote controller Refer to 3 Remote controller malfun...

Страница 23: ...e valve A and remove the refrigerant tank immediately after finishing the refrigerant charge operation The refrigerant charge port of these units have electric expansion valves that will close automat...

Страница 24: ...x w w 20 95 x 100 w x w x w x x 21 100 x w x w x w x w NOTE If you get confused in the middle of the input process press the button to return to setting mode 1 initial state The H1P LED is off x Resum...

Страница 25: ...tons LED state Throughout the manual the state of the LEDs is indicated as follows Setting the push button switch BS1 5 Function of the push button switch which is located on the outdoor unit PCB A1P...

Страница 26: ...ormal w abnormal c under preparation or under test operation 2 Indication of low noise operation state x standard operation factory setting w operation 3 Indication of power consumption limitation set...

Страница 27: ...seconds The H1P LED is on w Perform following steps 1 Press the button 3 times 2 Press the button once to confirm 3 Press the button in order to change the LED display to the following display 4 Press...

Страница 28: ...iping length and correct the refrigerant charge level by recovering any excessive refrigerant with a refrigerant recovery machine Insufficient refrigerant E4 F3 Check if the additional refrigerant cha...

Страница 29: ...pipe stop valve service port with the unit not operating refer to Pre charging on page 17 make sure to charge the remaining charging quantity using the following procedure 1 Turn the power of the ind...

Страница 30: ...as the following calculate the volume of A B as a single room or as the smallest room 3 Calculating the refrigerant density using the results of the calculations in steps 1 and 2 above If the result o...

Страница 31: ...N D UNIT TO OUT D UNIT TO IN D UNIT TO OUT D UNIT F1 F2 F1 F2 F1 F2 F1 F2 F1 F2 F1 F2 8 7 7 6 6 3 5 6 13 12 1 1 2 3 4 5 3 4 7 8 2 9 6 4 1 2 5 7 7 8 1 9 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6...

Страница 32: ...4PW39996 1B Copyright Daikin...

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