Viking Designer DDFB304, Сервисный журнал, Страница: 7 / 48

6
EQUIPMENT AND TOOLS
A separate set of hoses and hand valves must be maintained for use with sealed systems
with R134a refrigerant. Equipment used with CFC refrigerants will contaminate R134a
(HFC) sealed systems.
EQUIPMENT DESCRIPTION
Tank of Liquid Refrigerant – Care should be
taken to be sure the proper refrigerant is
available. (Fig. 1)
Handle the tank of liquid refrigerant
properly.
The contents of the tank are under
pressure. Observe the following precautions and
DO NOT :
•
Drop or handle the tank roughly
•
Tamper with any installed safety relief valves
•
Store the tank in direct sunlight or in a damp
location.
•
Heat the tank above 125
°
F.
•
Refill the tank
Empty tanks should be disposed of properly.
ILLUSTRATION
Charging Scale – An electronic or
computerized charting scale measures the
amount of liquid refrigerant charge that is
dispensed into a sealed system. (Fig. 2)
The amount of refrigerant dispensed into the
sealed system is indicated on a Liquid Crystal
Display (LCD). The LCD is calibrated in .5
ounces or .01 gram increments or smaller. The
charging scale can be used to monitor the
amount of refrigerant necessary to back flush a
system.
Charging Hose Configuration – One hose 4 to
6 feet long should be attached to a pigtail
consisting of a ball type hand valve with a 45
°
threaded fitting. A low-loss adapter should be
connected to the 45
°
threaded fitting. (Fig. 3)