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Installation and operation manual
90
EKEQMCBV3
Option kit for combination of Daikin condensing units
with field supplied air handling units
4PW52447-1
Piping connections
Make sure to install gas and liquid pipe diameters in function of the
air handling unit capacity class.
Selection of piping material
1.
Foreign materials inside pipes (including oils for fabrication)
must be 30 mg/10 m or less.
2.
Use the following material specification for refrigerant piping:
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 the 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.
3.
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).
Cautions for brazing
Be sure to carry out a nitrogen blow when brazing.
Brazing without carrying out nitrogen replacement or releasing
nitrogen into the piping will create large quantities of oxidized
film on the inside of the pipes, adversely affecting valves and
compressors in the refrigerating system and preventing normal
operation.
When brazing while inserting nitrogen into the piping, nitrogen
must be set to 0.02 MPa with a pressure-reducing valve (=just
enough so that it can be felt on the skin).
For details, see manual of the outdoor unit.
Air handling unit capacity class
Gas pipe
Connection pipe
Liquid pipe
50
Ø12.7
Ø6.4
63
Ø15.9
Ø9.52
80
100
125
140
200
Ø19.1
250
Ø22.2
Pipe Ø
Temper grade of piping material
15.9
O
19.1
1/2H
O = Annealed
1/2H = Half hard
Pipe Ø
Minimal thickness t (mm)
6.4
0.80
9.5
0.80
12.7
0.80
15.9
0.99
19.1
0.80
22.2
0.80
1
Refrigerant piping
2
Part to be brazed
3
Taping
4
Hands valve
5
Pressure-reducing valve
6
Nitrogen
Summary of Contents for ERQ Series
Page 2: ......
Page 16: ...Combination Table ESiEN09 06 A 6 General Information...
Page 17: ...ESiEN09 06 A Specifications 7 1 Specifications 8 1 1 Outdoor Units 8...
Page 33: ...ESiEN09 06 A Function general Function 23 1 2 Operation Mode...
Page 58: ...Outline of Control ESiEN09 06 A 48 Function...
Page 71: ...ESiEN09 06 A Wiring Diagram of Control Box Control Box EKEQ CBV3 61 3 2 F box...
Page 109: ...Test Operation ESiEN09 06 A 100 Test Operation 1 2 2 Turn power on...