16
05
Installation
Manual 1843 Rev B p/n 001843 0000
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5 8
KEY
1. HEATERS
2. FOR 460 VOLTS
3. FOR 230 VOLTS
4. SWITCH
5. INPUT (FUSE PROTECTED)
6. TEMPERATURE GAUGE
BEFORE ENERGIZING HEATERS
1. BE SURE WATER JACKET IS FILLED.
2. TURN OFF COOLING WATER SUPPLY.
3. DO NOT RESTRICT COOLING WATER
OUTLET.
7. OPTIONAL TEMPERATURE SWITCH
INSTALLED IN SEPARATOR HOUSING
8. INSTALL (1) HEATER INTO ¾ NPT TAP
FAR SIDE (½ NPT ON KT150, 300)
9. INSTALL (1) HEATER INTO ¾ NPT TAP
THIS SIDE (½ NPT ON KT150, 300)
MODEL
KT-150
KT-300
KT-500
KT-850
HEATER
300 W
500 W
750 W
1000 W
QTY
2
2
2
2
PART NO.
074501-0000
074502-0000
074503-0000
074504-0000
Figure 5-5 – Water Jacket Heater Installation
WARNING
!
Do not allow the cooling water to freeze in the
pump.
Freezing of the cooling water jacket usually results
in extensive damage to the pump cylinder, which
cannot be repaired.
Connect a water supply line with “on-off” valve
to the water inlet and an open drain to the water
outlet. The inlet line should have a flow-regulating
valve. If the water supply is unreliable, install a flow
switch to stop the pump or signal when the flow is
interrupted. Normally the cooling water will be off
when the pump is not running.
A water pressure relief valve is fitted in the water
jacket. This relief valve is set to open at 50 PSIG
(3.5 bar).
Standard cooling water rates are for up to 80°F
(26°C) supply temperature and operation within the
design of continuous operating pressure range of
0.1 to 100 Torr (0.13-130 mbar).
Sustained operation above 100 Torr (130 mbar)
and/or long pump-downs generally require larger
cooling water flow rate and/or external oil heat
exchanger. Larger cooling water rates increase
cooling efficiency by reducing heat dissipation to
the room and keeping oil cooler (longer oil life and
reduced oil loss through the oil mist eliminator).
VACUUM GAUGES
The vacuum gauge(s) to be installed on the pump
must be selected to meet the requirements of the
particular pump application. Two general types of
vacuum gauges are used for the testing of vacuum
equipment: total pressure reading, such as Pirani
or thermocouple gauges, and 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 vapor 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 leaks. A high reading on a thermistor
or thermocouple gauge may indicate that the
pump is contaminated or that it leaks, or both. A
high reading on a McLeod gauge means that a
leak is present. Total pressure gauge readings
will always be slightly higher than McLeod gauge
readings because they include the partial pressure
due to oil vapor at the localized temperatures.
The most accurate total pressure gauges are
capacitance manometers and piezo gauges that
are independent of the physical properties of the
gas or vapor.