Parr Instrument 4575/76 HP/HT - Manual (Page 7)

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4575/76 HP/HT Pressure Reactors
7
Note: Do not make connections to a Variac,
Powerstat or the like to attempt to control the
heating output. The heavy inductive load on
the primary side of such devices can destroy
the internal solid state relay located in the 4848
Controller.
3. Connect the heater cord from the heater into
the heater socket on the rear panel of the Series
4848 Reactor Controller.
Parr Motor Only:
The Motor output connector is to be used only
with Parr Instrument Company motor assem-
blies supplied with the appropriate motor power
cord.
4. The support and heater are shipped fully as-
sembled. The heater raises and lowers on its
support rod to permit the vessel or cylinder to
be removed. Lower the heater, open the hinged
retainer on the front of the support and slide the
vessel into its support. Fixed head vessels have
a square lip which fits into a matching groove in
the support plate. Removable vessels are sup-
ported by the split rings which rest on top of the
support plate. The stirrer drive connector lifts
by rotating and lifting the knob above the belt
guard. The universal joint contains a cross pin
that slips into the groove on top of the magnetic
drive.
5. Plug the motor cord into the motor socket on the
rear of the controller.
Secure the clamp on the motor cord with
the provided screw next to the motor
socket for safety purposes..
6. Connect the thermocouple extension wire to
both the thermocouple and to the controller in
the “Primary Temp Input” position on the rear
panel. Insert the thermocouple into thermowell.
7. Connect leads from accessory packages such as
tachometer, pressure transducer and high temp
cut-off to the designated positions on the back
panel of the 4848 Controller.
8. Connect cooling water to internal cooling coil if
installed.
9. Connect cooling water to the magnetic stirrer.
See Instruction Manual 234M.
10. Connect tubing to the rupture disc outlet and run
to a safely vented area. See Instruction Manual
231M.
11. Note the voltage and amperage requirement
stamped on the controller data plate, and then
plug the power cord into an appropriate outlet.
Power for these reactors should be drawn from
a grounded outlet capable of carrying up to the
full current rating of the reactor.
12. If an electric stirrer motor is supplied, turn the
speed control knob fully counterclockwise on
the Reactor Controller, turn on the motor switch
and slightly increase the speed for a short run
to check the stirrer drive system but do not turn
on the heater, put heater toggle switch in center
position (OFF). There must always be a vessel in
the heater when it is turned on, and the vessel
and heater sizes must match. If the heater is op-
erated without proper size vessel in contact with
the mantle, the mantle may overheat and fail.