Graco Aerobotix RC50, Инструкция по эксплуатации

Страница: 34 / 66

Operation
34 313813A
Pumpline
Key:
NA Pump Turn-Dial
NB Metering Pump
NC Metering Pump Air Purge Valve
ND Metering Pump Motor NE Pressure Switches
NF Relief Valve
NG Pressure Transducer
NH Inlet Pressure Gauge
Both pumps are protected on the inlet side by a basket
filter and a low-pressure switch. An inlet pressure gauge
also provides a visual indication of the pump inlet pres-
sure. Day tank pressure below the setting of the Meter-
ing Pump Low Inlet Pressure switch will cause a
warning alert and the affected metering pump motor will
shutdown. See the table at the beginning of the
Set-
tings section on page 45 for switch setting.
The pumps are protected on the outlet side by a
mechanical relief valve and a pressure switch, see the
table at the beginning of the
Settings section on page
45 for settings. A pressure transducer provides a digital
signal to the PLC to indicate the outlet pressure. Should
this pressure be exceeded, the affected metering pump
motor will automatically stop and will be accompanied
by alarms.
F
IG
. 18
ti14338a1
NA
NB
ND NC
NF
NE
NE
NH
NG