30934 V2 R Series
Page 9 Operating Manual
www.grantinstruments.com
Pumping heat transfer liquid around an external system can lead to hazards that are
outside the control of Grant Instruments. It is essential that the user conducts a risk
assessment of the entire equipment installation to ensure that correctly rated materials
have been used throughout and that the system can be used safely.
5.1.4 Emptying the R unit
The R unit tank should be emptied to a safe level prior to moving. A drain tap is included
on R2, R3, R4 & R5 units to allow convenient emptying. See section 5.2.3 for full details.
Allow the liquid temperature to fall below 50˚C before emptying.
5.1.5 Setting up and switching on
Follow instructions in section 5.1.3 to attach the pump connector plate and insulated
hose. Before filling and switching on, attach the open end of the hose to the application,
taking care to note the inlet and outlet.
Ensure all hoses are connected securely. Liquid will begin pumping
immediately once the equipment is switched on.
Add the appropriate working liquid to the bath to at least the minimum recommended fill
level such that the float level switch is fully raised.
Power supply for the R1, R2 & R3 units
The Optima unit takes its power from the mains socket outlet on the rear of the cooler
unit, (see Section 5.2.2) via the interconnecting power cable. Plug one end of this
interconnecting cable into the power inlet socket on the rear of the Optima unit and the
other end into the socket outlet mounted on the rear of the cooler unit. Plug the mains
cable into the fused power inlet socket on the rear of the refrigeration unit.
Switch on the R unit using the power switch on the front of the R unit and rear of the
Optima unit. The motor will start immediately and the buzzer will sound while the unit
starts up. The low temperature bath/circulator is ready to use.
Power supply for the R4 & R5 units
The Optima unit is connected directly to the mains supply with the IEC cable supplied
with the Optima unit. Connect the R unit directly to the mains using the IEC cable
provided (see Section 5.2.2).
Power supply for 120V models
The 120V Optima units and refrigeration units have separate fixed mains cords. Connect
both to the mains supply.
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