Installation/Service Tooling; Attached Accesories - Electra DNG 18 Service Manual

Installation/Service Tooling for R410A
Gauge manifold
Charge hose
Electronic scale for
refrigerant charging
Torque wrench (nominal
dia. 1/2, 5/8)
Flare tool (clutch type)
Gauge for projection
adjustment
Vacuum pump adapter &
check valve
Gas leakage detector
Incidentally, the "refrigerant cylinder" comes with the refrigerant designation (R410A) and protector coating in the U.S's ARI specified rose colour (ARI colour code:
PMS 507). Also, the "charge port and packing for refrigerant cylinder" requires 1/2 UNF 20 threads per inch corresponding to the charge hose's port size.
CAUTION R410A Air Conditioner Installation
THIS AIR CONDITIONER ADOPTS THE NEW HFC REFRIGERANT
(R410A) WHICH DOES NOT DESTROY OZONE LAYER. R410A
refrigerant is apt to be affected by impurities such as water, oxidizing
membrane, and oils because the working pressure of R410A refrigerant
is approx. 1.6 times of refrigerant R22. Accompanied with the adoption
of the new refrigerant, the refrigeration machine oil has also been
changed. Therefore, during installation work, be sure that water, dust,
former refrigerant, or refrigeration machine oil does not enter into the
new type refrigerant R410A air conditioner circuit. To prevent mixing
of refrigerant or refrigerating machine oil, the sizes of connecting
sections of charging port on main unit and installation tools are different
from those used for the conventional refrigerant units. Accordingly,
special tools are required for the new refrigerant (R410A) units. For
connecting pipes, use new and clean piping materials with high pressure
fittings made for R410A only.

ATTACHED ACCESORIES

Description Amount
1
1
1
1
1
1
4
4
4each
As the working pressure is high, it is impossible to measure the working pressure using
conventional gauges. In order to prevent any other refrigerant from being charged, the port
diameters have been changed.
In order to increase pressure resisting strength, hose materials and port sizes have been
changed (to 1/2 UNF 20 threads per inch). When purchasing a charge hose, be sure to
confirm the port size.
As working pressure is high and gasification speed is fast, it is difficult to read the indicated
value by means of charging cylinder, as air bubbles occur.
The size of opposing flare nuts have been increased. Incidentally, a common
wrench is used for nominal diameters 1/4 and 3/8.
By increasing the clamp bar's receiving hole size, strength of spring in the tool has been
improved.
Used when flare is made by conventional flare tool.
Connected to a conventional vacuum pump. It is necessary to use an adapter to prevent
vacuum pump oil from flowing back into the charge hose. The charge hose connecting
part has two ports -- one for conventional refrigerant (7/16 UNF 20 threads per inch) and
one for R410A. If the vacuum pump oil (mineral) mixes with R410A a sludge may occur
and damage the equipment.
Exclusive for HFC refrigerant.
Name
Technician's installation manual
Instruction manual for remote control
Instruction manual for unit dispaly
Remote control including batteries
Remote control bracket
Central control display
Rubber mounting pads
Tie - Wraps
Dibbles - Screws - Washers
Changes
Moreover, do not use the existing piping because there are some
problems with pressure fittings and possible impurities in existing
piping.
Changes in the product and components
In air conditioners using R410A, in order to prevent any other refrigerant
from being accidentally charged, the service port diameter size of the
outdoor unit control valve (3 way valve) has been changed. (1/2 UNF
20 threads per inch).
In order to increase the pressure resisting strength of the refrigerant
piping, flare processing diameter and opposing flare nuts sizes have
been changed. (for copper pipes with nominal dimensions 1/2 and
5/8).
In case of pipes welding please make sure to use dry Nitrogen inside
the pipes.
Use copper tube of spcial thickness for R410A: 1/4"-1/2" 0.8 mm
USE
Installation instructions
Operation instructions for remote
Operation instructions
Operating the air-conditioner
Hanging the remote control on the wall
Operating and main working display
Padding of the outdoor unit
Tightening the indoor and the outdoor units electrical cables
Installing bracket for remote control and central control display
APPENDIX A
5/8"-3/4" 1 mm
7/8" 1.1 mm
3