Daikin FWE03D Series, Installation Manual

5 Installation

Installation manual

9

FWE03~11D
Fan coil units
3P443944-5P – 2021.12

4.3

Preparing water piping

The  unit  is  equipped  with  a  water  inlet  and  water  outlet  for
connection to the water circuit. The water circuit must be provided by
an installer and must comply with the applicable legislation.

Before performing the water piping work, check the following points:

▪ The maximum water pressure is 1.6 MPa.

▪ The minimum water temperature is 5°C.

▪ The maximum water temperature is 90°C.

▪ Be sure to install components in the field piping that can withstand

the water pressure and temperature.

▪ Provide  adequate  safeguards  in  the  water  circuit  to  ensure  that

the  water  pressure  will  never  exceed  the  maximum  allowable
working pressure.

▪ Provide a proper drain for the pressure relief valve (if installed) to

avoid any water from coming into contact with electrical parts.

▪ Provide shut-off valves at the unit so that normal servicing can be

accomplished without draining the system.

▪ Provide  drain  taps  at  all  low  points  of  the  system  to  permit

complete  draining  of  the  circuit  during  maintenance  or  service  to
the unit.

▪ Provide  air  purge  valves  at  all  high  points  of  the  system.  The

valves  shall  be  located  at  points  which  are  easily  accessible  for
servicing.

NOTICE

The  unit  is  ONLY  to  be  used  in  a  closed  water  system.
Application  in  an  open  water  circuit  can  lead  to  excessive
corrosion of the water piping.

4.4

Preparing electrical wiring

4.4.1

About preparing the electrical wiring

WARNING

▪ ONLY use copper wires.

▪ Make sure the field wiring complies with the applicable

legislation.

▪ All field wiring MUST be performed in accordance with

the wiring diagram supplied with the product.

▪ NEVER  squeeze  bundled  cables  and  make  sure  they

do  NOT  come  into  contact  with  the  piping  and  sharp
edges. Make sure no external pressure is applied to the
terminal connections.

▪ Make sure to install earth wiring. Do NOT earth the unit

to  a  utility  pipe,  surge  absorber,  or  telephone  earth.
Incomplete earthing may cause electrical shock.

▪ Make  sure  to  install  the  required  fuses  or  circuit

breakers.

▪ Make sure to install an earth leakage protector. Failure

to do so may cause electrical shock or fire.

NOTICE

The  equipment  described  in  this  manual  may  cause
electronic  noise  generated  from  radio-frequency  energy.
The  equipment  complies  to  specifications  that  are
designed  to  provide  reasonable  protection  against  such
interference.  However,  there  is  no  guarantee  that
interference will not occur in a particular installation.

It  is  therefore  recommended  to  install  the  equipment  and
electric  wires  in  such  a  way  that  they  keep  a  proper
distance from stereo equipment, personal computers, etc.

WARNING

All  field  wiring  and  components  MUST  be  installed  by  a
licensed  electrician  and  MUST  comply  with  the  applicable
legislation.

DANGER: RISK OF ELECTROCUTION

WARNING

A  main  switch  or  other  means  for  disconnection,  having  a
contact  separation  in  all  poles,  MUST  be  incorporated  in
the  fixed  wiring  in  accordance  with  the  applicable
legislation.

Electrical characteristics

FWE-D

Phase

1 Ph

Frequency

50 Hz

Voltage range

220~240 V

Voltage tolerance

±10%

Maximum running current

0.46 A

Overcurrent fuse

5 A

Earth leakage circuit breaker

Must comply with applicable

legislation

Specifications for field wiring

Wire

Size (mm²)

Length

Power supply
wiring

H05VV-U3G

(a)(b)

According to the
applicable
legislation ≤4.0

—

Remote
controller and
unit
transmission
wiring

Sheathed wire 2
conductors

(c)

0.75~1.25

≤500 m

(d)

(a)

Only in case of protected pipes. Use H07RN-F in case of no
protection.

(b)

Run electrical wiring through a conduit to protect against external
forces.

(c)

Use double insulation wire for remote controller (sheath thickness
≥1 mm) or run wires through a wall or conduit so that the user
cannot come in contact with them.

(d)

The length shall be the total extended length in a system with
group control.

5

Installation

5.1

Mounting the fan coil unit

NOTICE

Do  NOT  use  excessive  force  when  connecting  the  piping.
Deformation of the piping can cause malfunctioning of the
unit.  Make  sure  that  the  tightening  torque  is  3  N•m  for  all
screws.