Residual Risks - mycom 2016 C Series Instruction Manual

1.3

Residual Risks

The following information assumes that this product is operated or inspected/maintained while being
used in general refrigerating/cold storage units. It is impossible to predict all the risk sources involved in
actual use of the refrigerating/cold storage units.
Devise appropriate countermeasures for hazardous sources in your systems.
Hazardous sources
A Motor and
compressor coupling
B Motor terminals
C Compressor
low-stage side
suction casing
D Compressor
high-stage side
discharge casing and
discharge piping
E Check valves/service
valves and joints on
each section of the
unit
F Solenoid
valves/motor
operated valves on
each section of the
unit
G Electric components
in each section of the
unit (oil heater,
protective switch,
etc.)
H Unit oil drains
I
Noises
Compound 2-stage Screw Compressor 2016**C
Table 1-2 Hazardous Sources
Predicted hazard
 Caught in due to contact
 Electric shock caused by
contact with live wires or
electrical leakage
 Frostbite due to contact
 Contact with or inhalation
of hazardous substances
generated by leakage of
refrigerant or the like
 Burn injury due to contact
 Contact with or inhalation
of hazardous substances
generated by leakage or
spout of refrigerant or the
like
 Contact with or inhalation
of hazardous substances
generated by mishandling
or leakage
 Frostbite or burn due to
contact
 Electric shock caused by
contact with live wires or
electrical leakage
 Pinched due to contact
with driving part
 Electric shock caused by
contact with live wires or
electrical leakage
 Pinched due to contact
with driving part
 Contact with hazardous
substances generated by
leakage or spout
 Burn caused by contact
with high-temperature
fluid
 Damage caused by noise  Wear protective gear.
Countermeasures in
operation
 Install coupling cover
and prohibit opening.
 Keep away.
 Keep away.
 Do not open terminal
boxes.
 Do not touch terminal
boxes.
 Keep away and do not
touch.
 Wear protective gear.
 Detect gas leakage.
 Keep away and do not
touch.
 Wear protective gear.
 Detect gas leakage.
 Sufficient ventilation
 Indicate valve
open/close state.
 Keep away and do not
touch.
 Wear protective gear.
 Install protective cover
on terminals, and
prohibit opening.
 Keep away and do not
touch.
 Wear protective gear.
 Install protective cover
on terminals, and
prohibit opening.
 Keep away and do not
touch.
 Wear protective gear.
 Sufficient ventilation
 Keep away and do not
touch.
 Wear protective gear.
1-4
2200LZJE-HO-C6-N_2013.12.
Chapter 1 Safety
Countermeasures in
cleaning, inspection,
and parts exchange
 Turn off motor main
power and control power,
and conduct
lockout/tagout.
 Turn off motor main
power and control power,
and conduct
lockout/tagout.
 Wear protective gear.
 Work under room
temperature.
 Wear protective gear.
 Work at a temperature of
not higher than 40°C.
 Sufficient ventilation
 Wear protective gear.
 Tagout for controlled
valve
 Turn off each breaker and
the control power, and
conduct lockout/tagout.
 Wear protective gear.
 Turn off each breaker and
the control power, and
conduct lockout/tagout.
 Wear protective gear.
 Sufficient ventilation
 Wear protective gear.
 Work at a temperature of
not higher than 40°C.
—
1.3 Residual Risks