Installation and operation manual
5
FXLQ20~63P7VEB
VRV System air conditioners
4PW53089-1B
Cautions for brazing
■
Be sure to carry out a nitrogen blow when brazing.
Brazing without carrying out nitrogen replacement or releasing
nitrogen into the piping will create large quantities of oxidized
film on the inside of the pipes, adversely affecting valves and
compressors in the refrigerating system and preventing normal
operation.
■
When brazing while inserting nitrogen into the piping, nitrogen
must be set to 0.02 MPa with a pressure-reducing valve (=just
enough so that it can be felt on the skin).
D
RAIN
PIPING
WORK
Rig the drain pipe as shown below. Improperly rigged piping could
lead to leaks and eventually wet furniture and belongings.
1
Carry out the drain piping
Connect the drain hose (accessory part) using the attached
hose and parts, as shown in the figure below.
2
If converging multiple drain pipes, install according to the
procedure shown below. Use a slope downwards at a gradient of
at least 1/100.
Select converging drain pipes with a size that is suitable for the
operating capacity of the unit.
3
After piping work is finished, check if drainage flows smoothly.
Pour approximately 1 liter of water slowly in the air outlet and
check drainage flow.
4
Be sure to insulate all indoor pipes.
E
LECTRIC
WIRING
WORK
General instructions
■
All field supplied parts and materials and electric works must be
conform to local and national regulations.
■
All wiring must be performed by an authorized electrician.
■
Use copper wire only.
■
Follow the "Wiring diagram" attached to the unit to wire the
outdoor unit, indoor units and the remote controller. For details
on hooking up the remote controller, refer to the "Installation
manual of the remote controller".
■
Attach the earth leakage circuit breaker and fuse to the power
supply line.
■
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 relevant local and national legislation.
Note that the operation will restart automatically if the main
power supply is turned off and then turned back on again.
■
This system consists of multiple indoor units. Mark each indoor
unit as unit A, unit B..., and be sure the terminal block wiring to
the outdoor unit and BS unit are properly matched. If wiring and
piping between the outdoor unit and an indoor unit are
mismatched, the system may cause a malfunction.
■
Be sure to ground the air conditioner.
■
Do not connect the ground wire to:
-
gas pipes: might cause explosions or fire if gas leaks.
-
telephone ground wires or lightning rods: might cause
abnormally high electric potential in the ground during
lightning storms.
-
plumbing pipes: no grounding effect if hard vinyl piping is
used.
■
Make sure electrical wires are stripped
equally.
Precautions
1
Observe the notes mentioned below when wiring to the power
supply terminal board.
-
Use a round crimp-style terminal for insulation sleeve for
connection to the terminal block for wiring the units. When
none are available, follow the instructions below.
-
Do not connect wires of different gauge to the same power
supply terminal. (Looseness in the connection may cause
overheating.)
1
Refrigerant piping
2
Part to be brazed
3
Taping
4
Hands valve
5
Pressure-reducing valve
6
Nitrogen
1
Drip pan
2
Drain hose (accessory part)
3
Metal clamp (accessory part)
4
3/4" drain pipe
5
Cut to a suitable length
6
Slope
1
2
3
4
5
6
6
2
3
1
5
4
6
Piping process inside unit
≥
1/100
Drain piping connections
■
Do not connect the drain piping directly to sewage
pipes that smell of ammonia. The ammonia in the
sewage might enter the indoor unit through the drain
pipes and corrode the heat exchanger.
■
Keep in mind that the drain pipe will become blocked if
water remains in the drain pipe.
1
2
3
1
Round crimp-style terminal
2
Attach insulation sleeve
3
Wiring
Summary of Contents for VRV
Page 14: ...4PW53089 1B Copyright Daikin...
