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

Installation manual

5

6.1.

Installation tools

Make sure to use installation tools (gauge manifold charge hose,
etc.) that are exclusively used for R410A installations to withstand the
pressure and to prevent foreign materials (e.g. mineral oils such as
SUNISO and moisture) from mixing into the system.
(The screw specifications differ for R410A and R407C.)

Use a 2-stage vacuum pump with a non-return valve which can
evacuate to –100.7 kPa (5 Torr, –755 mm Hg).

6.2.

Selection of piping material

1.

Foreign materials inside pipes (including oils for fabrication)
must be 30 mg/10 m or less.

2.

Use the following material specification for refrigerant piping:

Size: determine the proper size referring to chapter

"6.6. Example of connection" on page 7

.

Construction material: phosphoric acid deoxidized seamless
copper for refrigerant.

Temper grade: use piping with temper grade in function of the
pipe diameter as listed in the table below.

The pipe thickness of the refrigerant piping should comply
with relevant local and national regulations. The minimal pipe
thickness for R410A piping must be in accordance with the
table below.

3.

Make sure to use the particular branches of piping that have
been selected referring to chapter 

"6.6. Example of connection"

on page 7

.

4.

In case the required pipe sizes (inch sizes) are not available, it is
also allowed to use other diameters (mm sizes), taken the
following into account:

select 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 read the
paragraph 

"Caution to be taken when brazing refrigerant piping" on

page 4

 first.

6.4.

Connecting the refrigerant piping

1

Front connection or side connection

Installation of refrigerant piping is possible as front connection or
side connection (when taken out from the bottom) as shown in

figure 7

.

NOTE

Make sure the pump oil does not flow oppositely into
the system while the pump is not working.

Pipe Ø 

Temper grade of piping material

15.9

O

19.1

1/2H

 O = Annealed
 1/2H = Half hard

Pipe Ø

Minimal thickness 

t (mm)

Pipe Ø 

Minimal thickness 

t (mm)

6.4

0.80

22.2

0.80

9.5

0.80

28.6

0.99

12.7

0.80

34.9

1.21

15.9

0.99

41.3

1.43

19.1

0.80

NOTE

The pressure regulator for the nitrogen released when
doing the brazing should be set to 0.02 MPa or less.

(See figure 12)

Do not use anti-oxidants when brazing the pipe joints.

Residue can clog pipes and break equipment.

1

Left-side connection

2

Front connection

3

Right-side connection

NOTE

Precautions when knocking out knockout
holes

Be sure to avoid damaging the casing

After knocking out the knockout holes, we
recommend you remove the burrs and paint
the edges and areas around the edges using
repair paint to prevent rusting.

When passing electrical wiring through the
knockout holes, wrap the wiring with
protective tape to prevent damage as shown
in 

figure 8

.

1

Refrigerant piping

2

Location to be brazed

3

Nitrogen

4

Taping

5

Manual valve

6

Regulator

7

Nitrogen

1

Large knockout hole

2

Drill

3

Points for drilling

Summary of Contents for VRVIII REYQ-P8

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

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 15: ...to leaked electrical current which will have to be discharged with the grounding Be sure to install an earth leakage breaker One that can handle high frequency electrical noise This unit uses an inve...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 32: ...4PW39996 1A Copyright Daikin...

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