Refrigerant Replenishment - Daikin LRLEQ5AY1 Manuel D'installation

10. REFRIGERANT REPLENISHMENT

For refrigerant filling contractor
Use R410A for refrigerant replenishment.
The R410A refrigerant cylinder is painted with a pink belt.
Warning Electric Shock Warning
• Securely close the control box lid before turning power on.
• Before turning power on, check through the inspection hole (on
the left-hand side) of the control box lid that the RUN switch is set
to OFF.
If the RUN switch is set to ON, the fan may rotate.
• Check the LED indicators on the PCB (A1P) of the outdoor unit
through the inspection hole (on the right-hand side) of the control
box lid after the outdoor unit is turned on (see the illustration).
(The compressor will not operate for approximately 2 minutes
after the outdoor unit is turned on.
H2P blinks for the first five seconds when the power supply is
turned on. If the equipment is normal, H2P will be turned off in five
seconds. H2P lights for abnormality.)
Inspection hole (right-hand side)
(upper right-hand side of control box)
Control box lid
LED
(H1~8P)
Inspection hole
(left-hand side)
Control box
WARNING
• Use protective gear (e.g., protective gloves and glasses) at the
time of refrigerant filling.
• Pay attention to the rotation of the fan whenever the front panel is
opened while working.
The fan can rotate continuously for a while after the outdoor unit
stops operating.
[Refrigerant Replenishment Work]
CAUTION
• Refer to the Operation Method of Shutoff Valves for the control
method of the shutoff valves.
• Never replenish liquid refrigerant directly from a gas line.
Liquid compression may cause the compressor to fail.
1. The refrigerant must be noted for this product. Calculate the
amount of refrigerant replenishment according to the label for the
calculation of the amount of refrigerant replenishment.
2. Take the following procedure for refrigerant replenishment.
Refer to "8-1 Airtight Test/Vacuum Drying" for the connection of
the refrigerant cylinder.
(1) Turn on the indoor unit and control panel.
Do not turn on the outdoor unit.
(2) Replenish refrigerant from the service port of the shutoff valve on
the liquid side.
(3) If the calculated amount of refrigerant cannot be filled, take the
following steps to operate the system and continue refrigerant
replenishment.
a. Open the gas shutoff valve all the way and adjust the opening
of the liquid shutoff valve (*1).
English
Lift up this tab and
open the cover.
Inspection
hole cover
Inspection hole
(right-hand side)
RUN switch
(factory set: OFF)
REMOTE OFF ON
Inspection hole (left-hand side)
(upper left-hand side of control box)
b. [Warning/Electric Shock Warning]
Turn on the outdoor unit.
c. [Warning/Electric Shock Warning]
Turn on the RUN switch of the outdoor unit and replenish
refrigerant while the outdoor unit is in operation.
d. Turn off the RUN switch of the outdoor unit after the specified
amount of refrigerant is replenished.
e. [Caution]
Fully open the shutoff valves on the gas and liquid sides
promptly. Otherwise, a piping explosion may result from liquid
sealing.
Control box
Label pasting position
*1 The cylinder's internal pressure will drop when there is little refrig-
erant remaining in the cylinder, making it impossible to charge the
unit, even if the liquid shutoff valve opening is adjusted. In this sit-
uation, replace the cylinder with one that has more refrigerant
remaining.
Additionally, if the piping length is long, replenishing while the liq-
uid shutoff valve is fully closed may lead to activation of the pro-
tection system, causing the unit to stop operation.
1. After the work is completed, apply a screw lock agent (for flare
nuts) to the screws of the shutoff valves and service ports.
Refer to the "Handling Precautions for Valve Cover" and "Handling
Precautions for Service Port" in "6-5 Connecting the refrigerant
piping" for the handling of the valve covers and service ports.
2. After the refrigerant replenishment is completed, fill out the item
"total amount of refrigerant replenishment" on the label of instruc-
tions on refrigerant replenishment of the outdoor unit with the
actual amount of refrigerant replenishment.
Refer to the illustration of the label pasting position for instructions
on refrigerant replenishment (see the illustration on the above).
[Precautions for refrigerant cylinder]
At the time of refrigerant filling, check whether the siphon tube is pro-
vided. Then locate the cylinder so that the refrigerant will be filled in
the state of liquid (see table below).
R410A is a mixed refrigerant, the composition of which may change
and the normal operation of the system may not be possible if the
refrigerant is filled in the state of gas.
Cylinder provided with siphon tube.
Stand the cylinder upright and fill the refrigerant.
(There is a siphon tube inside, which makes it
possible to replenish the refrigerant in the state of
liquid without setting the cylinder upside down.)
Other cylinders
Stand the cylinder upside down and fill the
refrigerant.
(Pay attention so that the cylinder will not topple
down.)
Label of instructions on
refrigerant replenishment
15