Bard MULTI-TEC W18AAPA, Инструкция по эксплуатации

Страница: 96 / 116

Manual 2100-479
Page
3 of 11
Recovery equipment rated for R-410A refrigerant
R-410A has an ozone depletion potential of zero, but must be
reclaimed due to its global warming potential.
The gauge manifold set is specially designed to withstand
the higher pressure associated with R-410A. Manifold sets
are required to range up to 800 psig on the high side and 250
psig on the low side with a 250 psig low side retard.
All hoses must have a service rating of 800 psig. (This
information will be indicated on the hoses.)
Vacuum Pump and micron gauge must be used when
evacuating a system to 500 microns.
Leak Detectors
An electronic leak detector capable of detecting HFC
refrigerant can be used with R-410A refrigerant.
GENERAL
GAUGE MANIFOLD
A necessary instrument in checking and serving air
conditioning and heat pump equipment is the gauge
manifold. Its purpose is to determine the operating
refrigerant pressures in order for the serviceman to analyze
the condition of the system.
The valving on the manifold is so arranged that when
the valves are closed (front-seated) the center port on the
manifold is closed to the gauges and gauge ports. With
the valves in the closed position, the gauge ports are still
open to the gauges, permitting the gauges to register system
pressures. Opening either valve opens the center port to that
side of the manifold and system.
ATTACHING GAUGE MANIFOLD
For leak testing, purging, checking charge, charging liquid or
evacuating, connect high pressure side of gauge manifold to
Schrader valve on liquid or discharge line. Connect suction
side of gauge manifold to Schrader valve on suction line.
On heat pumps the suction line is between compressor and
reversing valve.
WARNING
The oils used with R-410A refrigerant are
hydroscopic and absorb water from the
atmosphere readily. Do not leave systems
open to the atmosphere for more than 5
minutes. If the system has been open
for more than 5 minutes, change the filter
dryer immediately before evacuation. Then
recharge the system to the factory specified
charge.
WARNING
Gauge manifold must be suitable for use
with R-410A refrigerant and POE oils.