Daikin VRV-WIII Service Manual download pdf (Page 40)

• Water-cooled design guide

• VRV Systems • Water-cooled design guide

7 Typical VRV-WIII installations

7 - 4 Example Installation

(With heat recovery from multiple systems through water circuit)

Temperature indicating controller



RWEY

PTPT

R R R

To BS unit

RWEY

PTPT

R RR

RWEY

PTPT

R RR

To BS unit



Temperature indicating controller



Temperature indicating controller

Part A



To BS unit

RWEY

PTPT

R RR

RWEY

PTPT

R RR

RWEY

PTPT

R R R

RWEY

PTPT

R R R

RWEY

PTPT

R R R

To BS unit



Expansion tank

Pump

Temperature controller

Y strainer

Flexible joint

Pressure gauge

Thermometer

Flow switch

 













Operation mode

T1 set value

T2 set value

Open: 

Closed: 

T3 set value

Use a hermestic cooling tower in terms of water quality control

Makeup water

(Used to fill the

tank as well)

In order to use brine for the freezing protection, install the

heat exchanger to break off the line concerned.

Cooling tower (32°C/37°C)

In order to provide two or more hydrothermal systems (e.g. mainly heating for the

north side system and mainly cooling on the south side), integrate the multiple

systems into a single system, thus allowing for the heat recovery even between the

water vs. water systems.

Makeup water

(Used to fill the

tank as well)

On each floor, If 1 multiple units are installed or 2 the units

are installed far away from each other, use horizontal reverse

return piping or a constant flow control valve to prevent air

drift.

It is recommended to provide a port used

for the cleaning of horizontal drain pipes.

For RWEY models, provide interlock with the flow switch.

(Through the pump operation signal, an operative flow

switch is recommended.)

Three-way valve (mixed type)

Cooling

(mainly for cooling)

Heating

(mainly for cooling)

In-between seasons

(cooling/heating combination)

15°C 25°C

20°C40°C

33°C, 31°C33°C, 31°C

Open/Closed

of valve

1 2 ... 35 36 37 38 39 40 41 42 43

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Daikin VRV-WIII Service Manual Page 40

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