Operating Instructions WBL-118 Refrigerated bath and circulator
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Caution: Note the following when connecting the equipment to an external
application system:
1. The external circulating pipe, including flexible tubing and hose, shall be
connected only after the equipment and application system are well seated
and installed. The length and distribution path shall be as short as possible
and be so arranged that no kink and other mechanical stress develops during
normal use which otherwise may result in thermal and/or liquid hazards!
2. Flexible hoses, fittings and couplings are important for the safe operation of
the equipment; Use only hoses, fittings and couplings provided with the
equipment or recommended by MRC!
3. The ratings of pressure and temperature for the hoses, fittings and the jacket,
container or heat exchanger of the application system, their chemical
resistance to the heat transfer liquid shall meet requirements of the operating
temperature and/or pressure range of the heat transfer liquid to be delivered
by the equipment!
4. Thermal insulation for hoses, fittings, couplings and the application system is
important for performance and safety! The materials of the insulation shall
meet the requirements of the maximum operating temperature range!
5. If no external circulating is necessary, use hoses, fittings and couplings to
short-circuit the liquid connections as for an external application!
Keep the cables and wiring protected by conduit and/or hose and well secured; keep
them clearly away from direct contact with any exposed heated parts of the
equipment and application system
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Caution: Risk of frozen hazard!
When water is employed as heat transfer liquid, and when intended for standstill for
long period and when experiencing low ambient is possible, run the equipment at
operating temperature close to ambient for at least 1hr. Empty the bath containing
water, and remove the water completely. Disconnect the equipment and remove the
mains plug from power source.
Do not disassemble or exchange assembly parts and electric circuits by unauthorized
personnel! Hazard of possible electric shock! In case of repairing, contact authorized
local MRC distributor or MRC personnel.
Always remove the mains plug from the socket before cleaning, moving, maintenance
The first time powering up after repairing or standstill for long period, or at
designated intervals under normal use, check the functionality of the following parts
or components:
Hydraulic tightness and fastening of flexible tubing for circulating, status of
insulation, at three months intervals; Aging, resistance to chemical stress from
the heat transfer liquid and its temperature and pressure of flexible hose, at six
months intervals;
Cutoff capability of the safety temperature limiter (STB).
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