Daikin EKEXMCBV3, Инструкция по установке и эксплуатации

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EKEXMCBV3
Option kit for combination of Daikin condensing units
with field supplied evaporators
4PW32096-1
Installation and operation manual
4
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.
V
ALVE KIT INSTALLATION
Mechanical installation
1 Remove the valve kit box cover by unscrewing 4x M5.
2 Drill 4 holes on correct position (measurements as indicated in
figure below) and fix the valve kit box securely with 4 screws
through the provided holes Ø9 mm.
Brazing work
3 Prepare the inlet/outlet field piping just in front of the connection
(do not braze yet).
4 Remove the pipe fixing clamp (C) by unscrewing 2x M5.
5 Remove the upper and lower pipe insulations.
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
A Inlet coming from the outdoor unit
B Outlet to evaporator
C Pipe fixing clamp
1 2 3 4 5
6
6
192.5 mm
340
m
m
C
B A