Residual Risks - mycom 3225**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/gas compression package units.
Note that all hazardous sources cannot be predicted for the applications mentioned.
Devise appropriate countermeasures for hazardous sources in your systems.
Hazardous sources
A Motor and
compressor coupling
Refer to Figure 1-1
B Motor terminals
C Compressor
low-stage side
suction casing
Refer to Figure 1-1
D Compressor
intermediate piping
(low-stage discharge
port to high stage
suction port)
Refer to Figure 1-1
E Compressor
high-stage side
discharge casing and
discharge piping
F Check valves/service
valves and joints on
each section of the
package unit
G Solenoid
valves/electric valves
on each section of the
package unit
H Electric components
in each section of the
package unit (oil
heater, protective
switch, etc.)
I Package unit oil
drains
J
Noises
Compound 2-stage Screw Compressor 3225**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
 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
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
 Gas leakage detection
 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.
 Wear protective gear.
1-4
2202MYJE-MY-C8-N_2018.02.
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 in temperatures
below 40 °C
 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