Safety Device Requirements; Installation; Overview: Installation; Opening The Units - Daikin RWEYQ8T9Y1B Installer And User Manual

6 Installation

5.5.2

Safety device requirements

The power supply must be protected with the required safety
devices, i.e. a main switch, a slow blow fuse on each phase and an
earth leakage protector in accordance with the applicable legislation.
For single models
Selection and sizing of the wiring should be done in accordance with
the applicable legislation based on the information mentioned in the
table below.
Model
RWEYQ8~14T9
For all models:
▪ Phase and frequency: 3N~ 50 Hz
▪ Voltage: 380~415 V
▪ Transmission line section: 0.75~1.25 mm
1000 m. If the total transmission wiring exceeds these limits, it
may result in communication error.
For free combinations
Calculate the recommended fuse capacity.
Formula Calculate, by adding the minimum circuit amps of each
used unit (according to the table above), multiply the
result by 1.1 and select the next higher recommended
fuse capacity.
Example Combining the RWEYQ30T9 by using the RWEYQ8T9,
RWEYQ10T9, and RWEYQ12T9.
▪ Minimum circuit ampacity of the RWEYQ8T9=16.1 A
▪ Minimum circuit
RWEYQ10T9=22.0 A
▪ Minimum circuit
RWEYQ12T9=24.0 A
Accordingly, the minimum circuit ampacity of the
RWEYQ30T9=16.1+22.0+24.0=62.1 A
Multiply the above result by 1.1 ⇒ (62.1×1.1)=68.31 A
⇒ the recommended fuse capacity would be 80 A.
NOTICE
When using residual current operated circuit breakers, be
sure to use a high-speed type 300 mA rated residual
operating current.
6 Installation
6.1

Overview: Installation

This chapter describes what you have to do and know on-site to
install the system.
Typical workflow
Installation typically consists of the following stages:

▪ Mounting the outdoor unit

▪ Connecting the refrigerant piping
▪ Checking the refrigerant piping
▪ Insulating the refrigerant piping
▪ Charging refrigerant
▪ Connecting the water piping
▪ Connecting the electrical wiring
Installer and user reference guide
22
Minimum Recommended
circuit fuses
ampacity
22.3 A 25 A
2
, maximum length is
ampacity of the
ampacity of the
6.2

Opening the units

6.2.1

To open the outdoor unit

DANGER: RISK OF ELECTROCUTION
DANGER: RISK OF BURNING
To gain access to the unit, front plates need to be opened as follows:
B
Once the front plate A is open, the electrical component box can be
accessed. See "6.2.2 To open the electrical component box of the
outdoor unit" on page 22.
For service purposes, the push buttons on the main PCB need to be
accessed. To access these push buttons, the electrical component
box cover does not need to be opened. See
field setting components" on page 36.
To install the water piping and field wiring, front plate B has to be
removed.
6.2.2 To open the electrical component box of
the outdoor unit
NOTICE
Do not apply excessive force when opening the electronic
component box cover. Excessive force can deform the
cover, resulting in entering of water to cause equipment
failure.
1
2
6.3 Mounting the outdoor unit
6.3.1

To provide the installation structure

Make sure the unit is installed level on a sufficiently strong base to
prevent vibration and noise.
RWEYQ8~14T9V1B + RWEYQ8~14T9Y1B
VRV IV water-cooled system air conditioner
11×
A
"7.2.3 To access the
4×
SW8
4P452191-1 – 2017.04