"Camel" Liquid Ring Medical Vacuum
Medical Systems
3-3
Minimum Run Timer(s)
All
LifeLine
"Camel" vacuum systems incorporate minimum run timers to minimize the starts and stops on the
vacuum pumps.
For
multiplex
systems, there is a minimum run timer built into the PLC for each pump, but they all have the same
time value. The timer is adjustable from 0 to 10 minutes. Once a pump is turned on by the PLC it will not turn it off
until its minimum run timer has expired. During operation, if VS-1 is still closed but the minimum run timer has
expired, the PLC will rotate to the next available unit after a 17-minute maximum run time. (See wiring schematic
for recommended timer settings.)
3.3 Relief Valve
Every
LifeLine
system is built with an integral vacuum relief valve. The purpose of this relief valve is to prevent
the pump from operating at a vacuum level that is too high. All relief valves on units are factory set at 25 inches Hg.
Relief valve settings may be different for higher altitudes. (See Section 1.3.1)
3.4 Anti-Siphon Valve
This valve is designed to prevent back siphoning of polluted water into a potable water supply. When the line
pressure drops to 1 psi or below, the spring-loaded disc float opens the atmospheric vent and the spring loaded
check valve closes the inlet. This prevents the creation of a vacuum in the discharge line and prevents back
siphoning. As water flows through the valve, it pushes the check valve open and lifts the disc float that closes the
atmospheric vent, thus preventing leakage. The disc float is free floating without close fitting guides, which assures
freedom from sticking. The durable silicone disc on the disc float and the check valve permits use on hot and cold
water lines
Pressure - Temperature
Working temperature:
33° F - 210° F
Maximum pressure:
150 PSI
Minimum pressure:
15 PSI
Note:
This valve is not designed, tested, or approved to protect against
backpressure backflow.
3.5 Tank Drain
The standard tank drain consists of a manually operated ball valve.
To drain the liquid from the tank, open the tank bypass valve and close the tank isolation valves. Then open the vent
and drain valves. When draining is complete, close the vent and drain valves first, then open the tank isolation
valves and close the tank bypass valve.
NEVER SET THE VACUUM RELIEF VALVE AT A POINT THAT EXCEEDS THE FACTORY
RECOMMENDED LEVELS!
