Daikin ERQ200A7W1B, Installation Manual

Page: 14 / 24

Installation manual
12
ERQ125~250A7W1B
Inverter condensing unit
4PW51323-1D – 2022.10
8.9. Wiring example for wiring inside unit
See figure 21 .
9. P
IPE INSULATION
After finishing the leak test and vacuum drying, the piping must be
insulated. Take into account the following points:
 Make sure to insulate the connection piping and refrigerant
branch kits entirely.
 Be sure to insulate liquid and gas piping (for all units).
 Use heat resistant polyethylene foam which can withstand a
temperature of 70°C for liquid side piping and polyethylene foam
which can withstand a temperature of 120°C for gas side piping.
 Reinforce the insulation on the refrigerant piping according to
the installation environment.
Condensation might form on the surface of the insulation.
 If there is a possibility that condensation on the stop valve might
drip down into the air handling unit through gaps in the insulation
and piping because the outdoor unit is located higher than the
air handling unit this must be prevented by sealing up the
connections. See
figure 22 .
 For cooling only units, insulation which can withstand 70°C is
also sufficient for gas side piping.
10. C
HECKING OF UNIT AND INSTALLATION
CONDITIONS
Be sure to check the following:
The piping work
1 Make sure piping size is correct.
See
"6.2. Selection of piping material" on page 4 .
2 Make sure insulation work is done.
See
"9. Pipe insulation" on page 12 .
3 Make sure there is no faulty refrigerant piping.
See
"6. Refrigerant piping" on page 4 .
The electrical work
1 Make sure there is no faulty power wiring or loose nuts.
See
"8. Field wiring" on page 7 .
2 Make sure there is no faulty transmission wiring or loose nuts.
See
"8. Field wiring" on page 7 .
3 Make sure the insulation resistance of the main power circuit is
not deteriorated.
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 the power terminals and earth. Never use
the megatester for the transmission wiring (between outdoor and
air handling unit, outdoor and COOL/HEAT selector, etc.).
11. C
HARGING REFRIGERANT
The outdoor unit is factory charged, but depending on the length of
the piping when installed, the outdoor unit may require additional
charging.
For charging the additional refrigerant follow the procedure as
described in this chapter.
11.1. Important information regarding the refrigerant
used
This product contains fluorinated greenhouse gases. Do not vent
gases into the atmosphere.
Refrigerant type: R410A
GWP
(1)
value: 2087.5
(1)
GWP = global warming potential
Fill in the label as follows
1 Electric wiring
2 Wiring between outdoor unit and control box
3 Clamp to the electric box with field supplied clamps.
4 When routing out the power/ground wires from the right side:
5 When routing the remote control cord and inter-unit wiring, secure
clearance of 50 mm or more from the power wiring. Ensure that
the power wiring does not contact any heated sections (
).
6 Clamp to the back of the column support with field supplied
clamps.
7 When routing out the inter-unit wirings from the opening for piping:
8 When routing out the power/ground wires from the front:
9 When routing out the ground wires from the left side:
10 Grounding wire
11 When wiring, pay attention not to detach the acoustic insulators
from the compressor.
12 Power supply
13 Fuse
14 Earth leakage breaker
15 Ground wire
16 Outdoor unit
Ambient temperature Humidity Minimum thickness
≤ 30°C 75% to 80% RH 15 mm
>30°C ≥ 80 RH 20 mm
1 Gas line stop valve
2 Liquid line stop valve
3 Service port for adding refrigerant
4 Sealing up treatment
5 Insulation
6 Air handling unit - outdoor interconnection piping
Be sure to insulate local pipes, as touching them can
cause burns.
Refrigerant can not be charged until all field wiring and
field piping has been completed.
Refrigerant may only be charged after performing the leak
test and the vacuum drying.
1 From the multilingual fluorinated greenhouse gases label
peel off the applicable language and stick it on top of
1 .
2 Factory refrigerant charge: see unit name plate
3 Additional refrigerant amount charged
4 Total refrigerant charge
5 Greenhouse gas emissions of the total refrigerant charge
expressed as tonnes CO
2
equivalent
6 GWP=global warming potential
2
Contains fluorinated greenhouse gases
2
1
1
1
2
2
kg
tCO
2
eq
GWP × kg
1000
=
=
+
kg
=
kg
=
GWP: XXX
RXXX
1
6
3
4
5