Daikin ERQ Service Manual page 70

2 Selecting the expansion valve
The corresponding expansion valve needs to be selected for
your air handling unit. Select the expansion valve according to
the above limitations.
■
If conflicting result, capacity selection has
NOTE
priority over volume.
■
The expansion valve is an electronic type, it is
controlled by the thermistors that are added in
the circuit. Each expansion valve can control a
range of air handling units sizes.
■ The selected air handling unit must be
designed for R410A.
■
Extraneous substances (including mineral oils
or moisture) must be prevented from getting
mixed into the system.
■
SST: saturated suction temperature at exit of
air handling unit.
3 Selecting the capacity setting adaptor (see accessories)
■ The corresponding capacity setting adaptor needs to be
selected depending on the expansion valve.
■ Connect the correct selected capacity setting adaptor to
X24A (A1P). (See figure 4 and figure 6)
Capacity
setting adaptor
label
EKEXV kit (indication)
63 J71
80 J90
100 J112
125 J140
For the following items, take special care during
construction and check after installation is finished
Tick ✓
when
checked
■
Are the thermistors fixed firmly?
Thermistor may come loose.
■
Is the freeze-up setting done correctly?
The air handling unit may freeze up.
■
Is the control box fixed firmly?
The unit may drop, vibrate or make noise.
■
Do electrical connections comply with specifications?
The unit may malfunction or components may burn out.
■
Are wiring and piping correct?
The unit may malfunction or components may burn out.
■
Is the unit safely grounded?
Dangerous at electric leakage.
Installation and operation manual
60
Capacity
setting adaptor
label
EKEXV kit (indication)
140 J160
200 J224
250 J280
S
ELECTING THE INSTALLATION SITE
This is a class A product. In a domestic environment this product may
cause radio interference in which case the user may be required to
take adequate measures.
Select an installation site where the following conditions are fulfilled
and that meets your customer's approval.
■ The option boxes (expansion valve and electrical control box)
can be installed inside and outside).
■
Do not install the option boxes in or on the outdoor unit.
■
Do not put the option boxes in direct sunlight. Direct sunlight will
increase the temperature inside the option boxes and may
reduce its lifetime and influence its operation.
■
Choose a flat and strong mounting surface.
■ Operating temperature of the control box is between –10°C and
40°C.
■
Keep the space in front of the boxes free for future maintenance.
■
Keep air handling unit, power supply wiring and transmission
wiring at least 1 m away from televisions and radios. This is to
prevent image interference and noise in those electrical
appliances. (Noise may be generated depending on the
conditions under which the electric wave is generated, even if
1 m is kept.)
■ Make sure the control box is installed horizontally. Screw nuts
position must be downwards.
Precautions
Do not install or operate the unit in rooms mentioned below.
■
Where mineral oil, like cutting oil is present.
■ Where the air contains high levels of salt such as air near the
ocean.
■
Where sulphurous gas is present such as that in areas of hot
spring.
■
In vehicles or vessels.
■ Where voltage fluctuates a lot such as that in factories.
■ Where high concentration of vapor or spray are present.
■
Where machines generating electromagnetic waves are
present.
■
Where acidic or alkaline vapor is present.
■ The option boxes must be installed with entrances downward.
Option kit for combination of Daikin condensing units
: http://splitoff.ru/tehn-doc.html
EKEQFCBV3 + EKEQDCBV3
with field supplied air handling units
4PW52446-1