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Method for removing transportation stay
The yellow transportation stay installed over the compressor leg for
protecting the unit during transport must be removed. Proceed as
shown in
figure 3
and described below.
A
Compressor
B
Fixing nut
C
Transportation stay
1
Slightly loosen the fixing nut (B).
2
Remove the transportation stay (C) as shown in
3
Tighten the fixing nut (B) again.
CAUTION
If the unit is operated with the transportation stay attached,
abnormal vibration or noise may be generated.
4.5. Drain work
Check in the combination table under
page 1
whether drain work is allowed. In case drain work on your unit
is allowed and the installation site requires drain work, then follow the
guidelines below.
■
Drain kits for drainage are available as option.
■
If drain work from the outdoor unit causes trouble (for example, if
the drain water may splash on people) provide the drain piping
using a drain socket (optional).
■
Make sure the drain works properly.
NOTE
If drain holes of the outdoor unit
are covered by a mounting base
or by floor surface, raise the unit
in order to provide a free space
of more than 100 mm under the
outdoor unit.
4.6. Installing the unit
Since design pressure is 4.0 MPa or 40 bar, pipes of larger
wall thickness may be required. Refer to paragraph
"5.1. Selection of piping material" on page
Precautions for R410A
■
The refrigerant requires strict cautions for keeping the system
clean, dry and tight.
-
Clean and dry
Foreign materials (including mineral oils or moisture) should
be prevented from getting mixed into the system.
-
Tight
Read
"6. Precautions on refrigerant piping" on page 8
carefully and follow these procedures correctly.
■
Since R410A is a mixed refrigerant, the required additional
refrigerant must be charged in its liquid state. (If the refrigerant is
in state of gas, its composition changes and the system will not
work properly).
■
The connected indoor unit must be the EKHBRD unit.
Installation manual
7
figure
3.
"General information" on
7.
Installation
■
For installation of the indoor unit, refer to the indoor unit
installation manual.
■
Refer to the Engineering Data Book for the complete list of
technical and electrical specifications.
■
Never operate the unit with the discharge pipe thermistor (R2T),
suction pipe thermistor (R3T) and pressure sensors (S1NPH,
S1NPL) removed. Such operation may burn out the compressor.
■
Be sure to confirm the model name and the serial no. of the
outer (front) plates when attaching/detaching the plates to avoid
mistakes.
■
When closing the service panels, take care that the tightening
torque does not exceed 4.1 N•m.
5.
R
EFRIGERANT PIPE SIZE AND ALLOWABLE
PIPE LENGTH
■
Piping and other pressure containing parts shall
comply with the applicable national and international
regulations and shall be suitable for refrigerant. Use
phosphoric acid deoxidised seamless copper for
refrigerant.
■
Installation shall be done by a licensed refrigerant
technician, the choice of materials and installation
shall
comply
regulations. In Europe the EN378 is the application
standard that shall be used.
To persons in charge of piping work:
■
Be sure to open the stop valve after piping installing
and vacuuming is complete. (Running the system with
the valve closed may break the compressor.)
■
It is forbidden to discharge refrigerant into the
atmosphere. Collect the refrigerant in accordance with
the freon collection and destruction law.
5.1. Selection of piping material
■
Foreign materials inside pipes (including oils for fabrication)
must be ≤30 mg/10 m.
■
Construction material: phosphoric acid deoxidized seamless
copper for refrigerant.
■
Temper grade: use piping with temper grade in function of the
pipe diameter as listed in table below.
■
The pipe thickness of the refrigerant piping should comply with
relevant local and national regulations. The minimal pipe
thickness for R410A piping must be in accordance with the table
below.
Temper grade
Pipe size (mm)
of piping material
Ø9.5
Ø15.9
O = Annealed
■
In case the required pipe sizes (inch sizes) are not available, it is
also allowed to use other diameters (mm sizes), taken the
following into account:
■ select the pipe size nearest to the required size.
■ use the suitable adapters for the change-over from inch to
mm pipes (field supply).
with
national
and
international
Minimal thickness
(mm)
O
0.80
O
1.00
ERSQ+ERRQ011~016AAV1+Y1
Outdoor unit for air to water heat pump
4PW49635-1C
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