Grant Instruments FH16-D - Manual (Page 4)

Flow Heaters
Part No: 15630/Issue 3 Page March 2003 4
1 Safety
The following symbols marked on the equipment mean:-
Caution: Read these operating instructions fully before use and pay particular attention to
sections containing this symbol
Caution: Surfaces can become hot during use.
Always observe the following safety precautions
•
Use only as specified by the operating instructions, or the intrinsic protection may be impaired.
• After transport or storage in humid conditions, dry out the unit before connecting it to the supply
voltage. During drying out the intrinsic protection may be impaired.
• Connect only to a power supply with a voltage corresponding to that on the serial number label.
• Connect only to a power supply which provides a safety earth (ground) terminal.
• Before moving, disconnect at the power supply socket.
• Do not check the temperature by touch, use the temperature display or a thermometer.
• To reduce the risk of eye injury during high temperature operation, use safety goggles or
spectacles.
• Do not touch surfaces which become hot during high temperature operation.
• Ensure that the operating temperature is less than the maximum operating temperature of liquid
in the system.
• Set the adjustable overtemperature cut-out after setting or changing the set temperature, and
reset it at monthly intervals to check that the cut-out is operating correctly.
• Ensure that the mains switch is easily accessible during use.
• Do not block or restrict ventilation slots.
• If liquid is spilt inside the unit, disconnect it from the power supply and have it checked by a
competent person.
• It is the user’s responsibility to carry out appropriate decontamination if hazardous material is
spilt on or inside the equipment.
• Do not connect to a power supply or switch on before filling the system.
• Take care when topping up or draining, as the liquid in the system may be very hot or cold.
• If the alarm lamp is illuminated do not touch the liquid it may be very hot. Refill carefully, a hot
heater can cause a spattering of very hot water droplets and scalding steam.
• Always use a lid or polypropylene spheres when operating above 60°C. Take care when raising
and removing the lid, it may be hot. Steam and hot vapours can cause scalding.
• Drain before moving the unit. Before draining allow the liquid to cool to below 50°C.
• Use only liquids specified in the operating instructions, within the specified temperature range. If
the alarm lamp is illuminated the liquid temperature may be above its recommended maximum:
do not inhale the vapours given off as they may be toxic; liquids should be safely discarded and
replaced.
• When pumping to external apparatus, always use connecting pipe or hose suitable for the
operating temperature and liquid used, and check that the pipe connections are secure.
• To prevent excessive pressure occurring during closed loop circulation, fill the system to a
maximum of 95% of the total volume, to allow for liquid expansion.
• Do not disconnect any pipes or hoses while they contain very hot or cold liquid.