"Camel" Liquid Ring Medical Vacuum
Medical Systems
3-2
3.1.4 Camel Reservoir Tank
The Camel reservoir has three specific functions. It separates the air and water discharge from the vacuum pumps
by means of a specially designed muffler/baffle system. It reclaims discharge water and holds it for use as re-
circulated seal water. Finally, it is used to dissipate heat generated by the vacuum pumps. Under normal operation,
the water in the camel reservoir is replaced or turned over up to 6 times per day. The water in the reservoir is turned
over by means of a fresh water purge while the system is operating.
In the unlikely event that fresh water service is lost, the camel tank acts as a water reservoir. The reservoir allows
the vacuum pumps to continue to operate normally for up to 48 hours without requiring any additional water.
3.2 Control Panel Description and Operation
Each control panel contains the following components mounted in a NEMA 12 enclosure:
a. Non-combination across-the-line magnetic starter with thermal overload protection for each pump.
b. A 115-volt secondary control transformer for each pump.
c. A circuit breaker for each pump
d. If multiplexed, control panels contain a PLC for automatic alternation.
e. A HAND-OFF-AUTOMATIC selector switch mounted on the door of enclosure for each pump.
f. One SILENCE ALARM push button mounted on the door of enclosure.
g. Indicator Lights
1. One green - Illuminated "Hand-Off-Auto" selector switch for each motor
2. One amber - LAG PUMP RUN per vacuum system.
h. One RUN TIME METER for each pump
NOTE:
FOR MORE INFORMATION, REFER TO THE WIRING DIAGRAM SUPPLIED WITH YOUR UNIT.
3.2.1 Operation (Multiplex System)
Selector Switch Positions
a.
HAND
The vacuum pump operates continuously. The vacuum relief valve may open.
b. AUTO
Each vacuum pump starts and stops in response to vacuum switches that monitor the vacuum level in the
control tank. When the vacuum level drops to the low setting of the lead vacuum switch (VS-1), the
vacuum switch sends a signal to the control panel to turn on the lead vacuum pump. If the vacuum level
continues to fall after the lead pump starts, the lower setting of the lag vacuum switch (VS-2) will turn on
the lag vacuum pump to compensate the demand. When the second vacuum pump turns on, however, a
signal is sent to the control panel that illuminates the lag pump run light and activates the alarm. The alarm
and lag run light must be reset manually when the vacuum level in the control tank reaches the high setting
of the lag vacuum switch (VS-2). Pressing the "Horn Silence" push button can silence the alarm. Each
time the vacuum system reaches the high setting of the lead vacuum switch (VS-1) the pumps will
automatically alternate after its minimum run time has expired, meaning the previous lead vacuum pump
will now become the lag vacuum pump and vice versa
c.
OFF
The vacuum pump will shut down.
Motor Overload Reset
a. Depressing the RESET button on the starter manually resets the motor thermal overload and the relay
overload.
b. The associated overload contact closes to restore power to the control circuit.
