Daikin RWEYQ72PCYD Installation Manual Download Page 23

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English

10. CHECKS AFTER INSTALLATION

WARNING

• Never connect power supply wiring to the terminal block for remote

controller wiring as this could damage the entire system.

•

Attach the power supply wire securely.

•

To avoid injury, always make sure that the circuit breaker on the power
supply panel of the installation is switched off before doing any work.

After the installation, check the following before switching on the circuit
breaker:

The position of the switches that requires an initial setting
Make sure that switches are set according to your application needs
before turning the power supply on.

Power supply wiring and transmission wiring
Use a designated power supply and transmission wiring and make
sure that it has been carried out according to the instructions
described in this manual, the wiring diagrams and local and national
regulations.

Pipe sizes and pipe insulation
Make sure that correct pipe sizes are installed and that the insulation
work is properly executed.

Additional refrigerant charge
The amount of refrigerant to be added to the unit should be written
on the included “Additional Refrigerant” label, and attach it to the
rear side of the front cover.

Measurement of insulation in main power supply circuit
Using a megatester for 500 V, check that the insulation resistance of
2 M

Ω

or more is attained by applying a voltage of 500 V DC between

power supply and ground terminals. Never use the megatester for
the transmission wiring.

Installation date
Be sure to keep record of the installation date on the “Additional
Refrigerant” label.

11. TEST RUN

CAUTION

After completing installation, be sure to open the valves.
(Operating the unit with the valves shut will break the compressor.)

11-1 Air discharge

• Running the heat source water pump, carry out air discharge

process until the water comes out from the air discharge hole of local
piping.
(For the operation to be done for the first time after installation, you
need to perform a checking operation.)

11-2 Before turn on the power supply

• Close the control box cover securely before turning on power supply.
• Make settings for outside unit printed circuit board (A1P) after turn-

ing on the power supply and check the LED display from inspection
door that is on the control box cover.

11-3 Check operation

When running the unit for the first time after installation, be sure to per-
form a test operation following these steps. (Not performing a test oper-
ation when the unit is first installed may prevent the unit from operating
properly.)

• During the operation, monitor the outside unit operation status and

check for any incorrect wiring.

(Refer to figure 27)

Control box

Control box cover

Inspection door

[Service Precautions] label

(1) Check the connection of interlock

circuit

The outside unit cannot be operated if the
interlock circuit has not been connected.

(2)• As necessary, configure the system

settings onsite by using the
dipswitch (DS1) on the outside unit
printed circuit board (A1P) and push
button switches (BS1 to 5).

• When the system is in the multiple-

outside unit configuration, perform
the configuration on the main unit.
(Any settings made on a sub unit
will be ignored.)

After this, close the control box cover.

Always perform configuration after turning
ON the power supply. To learn the setting
method, refer to the [Service Precautions]
label attached at the position shown in the
figure on the right
(Control box cover in outside unit).
(Remember, the actual settings you have
made must be recorded on the [Service
Precautions] label.)

(3) Turn ON the power supply to the out-

side units and indoor units.

Make sure to turn ON the power supply
6 hours before starting the operation. This
is necessary to warm the crankcase prelim-
inarily by the electric heater.

(4) Start the heat source water pump

and fill the heat source water in the
outside unit.

The outside unit cannot be operated if the
heat source water pump is not running.

(5) Make sure that the temperature of

heat source water is kept within the
operation range (50-113°F (10-45°C)).

The outside unit cannot be operated at a
temperature outside the operation range.

(6) Check the LED on the printed circuit board (A1P) in the outside unit to see if the

data transmission is performed normally.

(7)• Using the push button switches

(BS1 - 5) on the printed circuit board
(A1P) of outside unit, carry out a
local setting, if necessary.

• When the system is in the multiple-

outside unit configuration, perform
the configuration on the main unit.
(Any settings made on a sub unit
will be ignored.)

(8) Check all stop valves are opened.

If some stop valve is closed, open
them.
(Refer to

9-10 Stop valve operation

procedure

[CAUTION]

Do not leave any stop valve closed.
Otherwise the compressor will fail.
For Heat recovery system of cooling and
heating:
Open all stop valves on the suction side,
discharge gas side and liquid side.
For cooling and heating switching operation
system:
Open the stop valves on discharge gas side
and liquid side.

(Keep the stop valve on

suction side fully closed.)

(9)Perform the check operation following

the instructions printed on the
[Service Precautions] label.

If you push the test run button (BS4) on the
printed circuit board (A1P) of the outside
unit for 5seconds, the test run starts.
If you want to interrupt the test run, push
the RETURN button (BS3) on printed circuit
board (A1P). The system continues resid-
ual operation for about 1 minute (maximum
10 minutes) and then stops.
(During test run, you cannot stop it by a
command from a remote controller.)

You need to perform the above settings
on the printed circuit board by access-
ing the printed circuit board through the
inspection door on the control box
cover.

Bulk
(main)

Bulk
(sub)

Multi

Demand

(

∗

) The base (main) unit is the outside unit to which the interconnecting wiring for the

indoor units is connected. The other outside units are sub units.

LED display
(Default status
before delivery)

One outside unit installed

When multiple
outside unit
installed (

∗