Tuthill KINNEY KC Series, Operator'S Manual, Page: 15 / 48

9
03
Installation
Manual 1807 Rev B p/n 001807 0000
If threaded connections are used, clean the
threads and turn them together about two turns.
Cover the remaining exposed threads with a
sealing compound such as Loctite 567 or PTFE
tape for piping up to 1 in. (25.4 mm) in diameter.
Use Titeseal on large pipe sizes. Screw the joint
together tightly.
Install a vacuum isolation valve between the
system and the pump with a means for connecting
a vacuum gauge on both sides of the valve and
an air admittance valve on the pump side of the
isolation valve. With such an arrangement, it is
possible to check either the system or the pump
for leaks without disconnecting the vacuum piping.
This isolation valve will also allow the system to be
kept under vacuum while the pump is not running,
and it will allow the pump to remain operating while
the system is open to atmospheric pressure.
VACUUM GAUGES
Two types of vacuum gauges are used for testing
vacuum equipment:
• Total pressure reading types, such as thermistor
or thermocouple gauges
• Partial pressure reading McLeod gauges
The McLeod gauge indicates the partial pressure
of permanent gases. It does not indicate the
component of pressure due to condensable
gases such as water vapor. It is not greatly
affected by vapor contamination unless the
contamination pressure is quite high. It is most
useful in confirming pump performance and for
determining the absence or presence of real leaks.
Thermistor or thermocouple gauges are preferable
for leak checking and indicating the degree of
contamination.
A high thermistor or thermocouple gauge reading
may indicate that the pump is contaminated, that
the pump leaks, or both. A high McLeod gauge
reading means that a real leak is present.
ELECTRICAL CONNECTIONS
WARNING !
Disconnect pump from electrical power
source prior to making repairs or adjustments
to any electric component of the unit.
Check the operating voltage of the motor by
comparing the lead connections with the markings
on the motor. Connect the motor to the proper
power source through the necessary switching
and safety equipment. After wiring is complete,
momentarily start and stop the motor to check
the direction of rotation against the arrow cast on
the pump. If the rotation is in the wrong direction,
switch any two wire leads to correct the direction.
These are generally printed on the connections
cover plate.
NOTE:
N
Standard pumps rotate clockwise as
viewed when facing the pump pulley.
WARNING !
When operating the pump in an enclosed
area it is necessary, for health reasons, to
have the area well ventilated. If ventilation is
not adequate, the pump discharge should be
filtered or piped to open air.
Do not block or restrict the flow of gas from
the pump discharge. Back pressure could
cause severe damage.
Ohe belt guard must be properly secured
to the pump at all times while the pump is
running.
GENERAL
Kinney KC pumps are designed for low-pressure
operation. They are not generally suitable for
prolonged periods of operation at high pressures.
Each pump has been thoroughly tested and
is ready for operation as soon as it is installed
and filled with oil. If the vacuum system is tight,
including the connections to the pump, the ultimate