MRC WBL-MINI Operating Manual

WBL-MINI

COOLING WATER CIRCULATOR

Operating Instructions

Operating Mamual

Before you operate the equipment please read carefully all the

instructions and safety notes. If you have any questions please phone us!

Follow the instructions on setting up, operation etc. This is the only

way to exclude incorrect operation of the equipment and to ensure full

warranty protection

1、 Safety notes

· Transport the equipment with care!

· Careful transportation of the equipment requested !

· The unit may NEVER be overturned nor put upside down !

· Equipment and its internal parts can be damaged :

- by dropping

- by shock.

· Equipment should only be operated by properly instructed personnel !

· Never operate the equipment without bath liquid!

· Do not start up the equipment if

- it is damaged or leaking

- the supply cable is damaged.

· Switch off the equipment and pull out the mains plug for:

- servicing or repair

- before moving the equipment!

· Drain the bath before moving the equipment!

· Have the equipment serviced or repaired only by properly qualified

personnel!

2、 Unpacking

Goods are packed carefully, largely preventing transport damage.

After unpacking , check first the equipment and accessories for possible
transport damage. If unexpectedly any damage can be noticed on the equipment it is
essential to notify the forwarding agent or the postal authorities so that an inspection
can take place.

Do not start operations with damaged instruments!

The unit may NEVER be overturned nor put upside down !

3、 Equipment description

Materials

All components in contact with the thermostating liquid are made from materials
suitable for the recommended liquids and temperature. The materials used are
rustfree stainless steel, copper, brass, NBR, plastics.

Refrigeration unit

The refrigeration unit consists essentially of a fully sealed compressor. The
thermostating liquid is cooled through a heat exchanger located inside the bath. Heat
of condensation and motor heat are dissipated on air-cooled units through a
fan-cooled ribbed condenser.
The refrigeration unit is protected against overpressure and compressor overload.
With insufficient ventilation of the condenser (e.g. dirt deposits) the equipment is
switched off.

Control unit

The control unit with indication and operating functions,
The equipment is provided with a LED display to indicate the measurements and
settings as well as the operational status. The setpoint and other settings are
selected using two or three keys.
A Pt 100 temperature probe senses the outflow temperature inside the bath. The
measurement is processed by a high-resolution AD converter. Further processing
involves a special control algorithm to operate the heating triac (with reduced
reaction on the mains supply), the automatic compressor control, and the cooling
control which operates with low-noise solenoid valves. The proportional cooling
principle permits control in the cooling range without any energywasting
counter-heat.

4、 Brief instructions

4.1 Assembly and setting up

It is advisable to set up the equipment so that the control unit is towards the
front and that the ventilation for the refrigeration unit, especially on equipment with
air-cooled condenser, (ventilation grille in lower part) is not impeded. Ensure a
minimum spacing of 0.5 m between ventilation grille and wall.

4.2 Filling and connection of external circuit

Fill the equipment with the appropriate circulating liquid to suit the operating
temperature. It should be filled with pure water, or a water-glycol mixture (min.
70:30%)!!

When using water as heat carrier at WBL-MINI please make sure that there
are no operating temperatures below 5°C in the outflow.

To assist in venting the pump, the pressure connection should be left open
when the equipment is filled for the first time, otherwise there may be permanent
damage to the pump!

Remove the plug on the filler opening at the upside. A funnel can be used for
filling..