ERX125~250A7W1B
Inverter condensing unit
4PW30064-1D
Installation manual
1
C
ONTENTS
Page
1. Introduction ................................................................................ 2
2. Main components....................................................................... 2
3. Selecting installation site............................................................ 2
4. Inspecting and handling the unit ................................................ 3
5. Unpacking and placing the unit.................................................. 3
6. Refrigerant piping....................................................................... 4
6.1. Installation tools ........................................................................... 4
6.2. Selection of piping material .......................................................... 4
6.3. Pipe connection............................................................................ 4
6.4. Connecting the refrigerant piping ................................................. 5
6.5. Protection against contamination when installing pipes............... 6
7. Leak test and vacuum drying ..................................................... 6
8. Field wiring................................................................................. 7
8.1. Internal wiring – Parts table ......................................................... 7
8.2. Power circuit and cable requirements .......................................... 8
8.3. General cautions .......................................................................... 8
8.4. System examples ......................................................................... 9
8.5. Leading power line and transmission line .................................... 9
8.6. Field line connection: power wiring ............................................ 10
8.7. Wiring example for wiring inside unit.......................................... 10
9. Pipe insulation.......................................................................... 10
10. Checking of unit and installation conditions ............................. 11
11. Charging refrigerant ................................................................. 11
11.1. Important information regarding the refrigerant used................. 11
11.2. Precautions when adding R410A............................................... 11
11.3. Stop valve operation procedure ................................................. 11
11.4. Additional refrigerant charge ...................................................... 12
11.5. Checks after adding refrigerant.................................................. 14
12. Before operation ...................................................................... 14
12.1. Service precautions ................................................................... 14
12.2. Checks before initial start-up...................................................... 15
12.3. Field setting................................................................................ 15
12.4. Test operation............................................................................. 16
13. Service mode operation ........................................................... 18
14. Caution for refrigerant leaks..................................................... 18
15. Disposal requirements ............................................................. 19
ERX125A7W1B
ERX200A7W1B
ERX250A7W1B
Inverter condensing unit
Installation manual
READ THIS MANUAL ATTENTIVELY BEFORE STARTING
UP THE UNIT. DO NOT THROW IT AWAY. KEEP IT IN
YOUR FILES FOR FUTURE REFERENCE.
IMPROPER INSTALLATION OR ATTACHMENT OF
EQUIPMENT OR ACCESSORIES COULD RESULT IN
ELECTRIC SHOCK, SHORT-CIRCUIT, LEAKS, FIRE OR
OTHER DAMAGE TO THE EQUIPMENT. BE SURE ONLY
TO USE ACCESSORIES MADE BY DAIKIN WHICH ARE
SPECIFICALLY DESIGNED FOR USE WITH THE
EQUIPMENT AND HAVE THEM INSTALLED BY A
PROFESSIONAL.
DAIKIN EQUIPMENT IS DESIGNED FOR COMFORT
APPLICATIONS. FOR USE IN OTHER APPLICATIONS,
PLEASE CONTACT YOUR LOCAL DAIKIN DEALER.
IF UNSURE OF INSTALLATION PROCEDURES OR USE,
ALWAYS CONTACT YOUR DEALER FOR ADVICE AND
INFORMATION.
THIS AIR CONDITIONER COMES UNDER THE TERM
"APPLIANCES NOT ACCESSIBLE TO THE GENERAL
PUBLIC".
The refrigerant R410A requires strict cautions for keeping
the system clean, dry and tight.
■
Clean and dry
Foreign materials (including mineral oils such as
SUNISO oil or moisture) should be prevented from
getting mixed into the system.
■
Tight
R410A does not contain any chlorine, does not
destroy the ozone layer, and does not reduce the
earth's protection against harmful ultraviolet radiation.
R410A can contribute slightly to the greenhouse
effect if it is released. Therefore we should take
special attention to check the tightness of the
installation.
Read
"6. Refrigerant piping" on page 4
carefully and follow
these procedures correctly.
Since design pressure is 4.0 MPa or 40 bar, pipes of larger
wall thickness may be required. The wall thickness of
piping must be carefully selected, refer to paragraph
"6.2. Selection of piping material" on page 4
details.
