User Manual
4848B Reactor Controller
www.parrinst.com
3
Explanation of Symbols
II On position, full power heater switch
I On position, half power heater switch
O Off Position
~ Alternating Current (AC)
This CAUTION symbol may be present on the Product Instrumentation
and literature. If present on the product, the user must consult the ap-
propriate part of the accompanying product literature for more infor-
mation.
Protective Earth (PE) terminal. Provided for connection of the protec-
tive earth (green or green/yellow) supply system conductor.
Cleaning & Maintenance
Periodic cleaning may be performed on the exterior
surfaces of the controller with a lightly dampened
cloth containing mild soap solution. All power
should be disconnected and the power cord should
be unplugged when cleaning the 4848B Controller.
There are no user serviceable parts inside the prod-
uct other than what is specifi cally called out and
discussed in this manual. Advanced troubleshooting
instructions beyond the scope of this manual can
be obtained by calling Parr Instrument Company in
order to determine which part(s) may be replaced or
serviced.
Ensure that any hot surfaces have had ad-
equate time to cool before cleaning or main-
taining the reactor and/or its components.
Safety Information
To avoid electrical shock, always:
1. Use a properly grounded electrical outlet of cor-
rect voltage and current handling capability.
2. Ensure that the equipment is connected to elec-
trical service according to local national electri-
cal codes. Failure to properly connect may create
a fi re or shock hazard.
3. For continued protection against possible haz-
ard, replace fuses with same type and rating of
fuse.
4. Disconnect from the power supply before main-
tenance or servicing.
To avoid personal injury:
5. Do not use in the presence of fl ammable or com-
bustible materials; fi re or explosion may result.
This device contains components which may
ignite such material.
6. Refer servicing to qualifi ed personnel.
Intended Usage
This controller has been designed for use with Parr
pressure vessels and reactors. It has been de-
signed, built, and tested to strict physical and electri-
cal standards. However, it is the user’s responsibil-
ity to install and operate it in conformance with local
pressure and electrical codes.
If the instrument is used in a manner not specifi ed
by Parr Instrument Company, the protection provid-
ed by the equipment may be impaired.