Daikin FXTQ80A7VEB Installation Manual Download

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English

Refnet headers

(4) Additional refrigerant charge

When using FXTQ indoor units, additional refrigerant needs to
be charged to the system.

Total system refrigerant charge =

Z = O + R + P

: standard factory charge of outdoor unit

: additional refrigerant charge according to liquid piping

diameter/length and outdoor unit specific amount defined in
outdoor unit manual

: additional refrigerant charge due to use of FXTQ indoor units

P =

1..4

: additional charge for each indoor unit used (depending on

type)

7. DRAIN PIPING WORK

Rig the drain pipe as shown below and take measures
against condensation. Improperly rigged piping could lead
to leaks and eventually wet furniture and belongings.
Insulate the drain hose inside the building.

(1) Carry out the drain piping.

• A drain trap need not be installed.
• The drain pipe should be short with a downward slope

lower than 1/100 and should prevent air pockets from
forming.

• The diameter of the piping is the same as that of the

connecting pipe (PS1B), and should be kept equal to or
greater than that of the connecting pipe.

• If converging multiple drain pipes, install according to the

procedure shown below. (Select an appropriate central
drain pipe thickness for the units they will be connected
to.)

(2) After piping work is finished, check drainage flows

smoothly.
• Open the water supply port, add approximately 1 liter of

water slowly into the drain pan and check drainage flow.
Pools of drainage can cause the drain pipes to clog.

CAUTION

• 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.

8. ELECTRIC WIRING WORK

8-1

GENERAL INSTRUCTIONS

• All field supplied parts and materials and electric works must

conform to local codes.

• Use copper wire only.
• For electric wiring work, refer to also “Wiring diagram label”

attached to the control box lid.

• For remote controller wiring details, refer to the installation

manual attached to the remote controller.

• All wiring must be performed by an authorized electrician.
• This system consists of multiple indoor units. Mark each

indoor unit as unit A, unit B..., and be sure the terminal board
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.

• 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.

• Refer to the installation manual attached to the outdoor unit

for the size of power supply wiring connected to the outdoor
unit, the capacity of the circuit breaker and switch, and wiring
instructions.

• Be sure to ground the air conditioner.
• Do not connect the ground wire to gas and water pipes,

lightning rods, or telephone ground wires.

• Gas pipes: might cause explosions or fire if gas leaks.
• Water pipes: no grounding effect if hard vinyl piping is

used.

• Telephone ground wires or lightning rods: might cause

abnormally high electric potential in the ground during
lighting storms.

12HP

KHRQ22M75H or
KHRQ23M75H

14HP

KHRQ22M75H or
KHRQ23M75H