Singer SNG21-09IVi, User Manual, Page: 107 / 112

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connection pipe is not yet connected, air will be sucked in and cause pressure
rise or compressor rupture, resulting in injury.
5. When installing the unit, make sure that connection pipe is securely
connected before the compressor starts running.
If compressor starts
running when stop valve is open and connection pipe is not yet connected,
air will be sucked in and cause pressure rise or compressor rupture, resulting
injury.
6. Prohibit installing the unit at the place where there may be leaked
corrosive gas or
fl ammable gas. If there are leaked gasses around the unit,
it may cause explosion and other accidents.
7. Do not use extension cords for electrical connections. If the electric
wire is not long enough, please contact a local authorized service center and
ask for a proper electric wire. Poor connections may lead to electric shock or
fi re.
8. Use the speci fi ed types of wires for electrical connections between
the indoor and outdoor units. Firmly clamp the wires so that their terminals
receive not external stresses. Electric wires with insuf fi cient capacity, wrong
wire connections and insecure wire terminals may cause electric shock or fi re.
SPECIALIST’S MANUAL
• Repair to intrinsically safe components
Do not apply any permanent inductive or capacitance loads to the circuit
without ensuring that this will not exceed the permissible voltage and current
permitted for the equipment in use.
Intrinsically safe components are the only types that can be worked on while
live in the presence of a
fl ammable atmosphere. The test apparatus shall be
at the correct rating.
Replace components only with parts speci
fi ed by the manufacturer. Other
parts may result in the ignition of refrigerant in the atmosphere from a leak.
• Cabling
Check that cabling will not be subject to wear, corrosion, excessive pressure,
vibration, sharp edges or any other adverse environmental effects. The check