2201Q4JE-MY-C9-N_2018.01.
Chapter 1 Safety
Compound 2-stage Screw Compressor 4032**C
1.3
Residual Risks
1-4
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.
Table 1-2 Hazardous Sources
Hazardous sources
Predicted hazard
Countermeasures in
operation
Countermeasures in
cleaning, inspecting,
and replacing parts
A
Motor and
compressor coupling
Refer to Figure 1-1
Caught in due to contact
Install coupling cover
and prohibit opening.
Keep away.
Turn off motor main
power and control
power, and conduct
lockout/tagout.
B
Motor terminals
Electric shock caused by
contact with live wires or
electrical leakage
Keep away.
Do not open terminal
boxes.
Do not touch terminal
boxes.
Turn off motor main
power and control
power, and conduct
lockout/tagout.
C
Compressor
low-stage side
suction casing
Refer to Figure 1-1
Frostbite due to contact
Contact with or inhalation of
hazardous substances
generated by leakage of
refrigerant or the like
Keep away and do not
touch.
Wear protective gear.
Detect gas leakage.
Wear protective gear.
Work under room
temperature.
D Compressor
intermediate piping
(low-stage discharge
port to high stage
suction port)
Refer to Figure 1-1
Burn injury due to contact
Contact with or inhalation of
hazardous substances
generated by leakage or spout
of refrigerant or the like
Keep away and do not
touch
Wear protective gear
Gas leakage detection
Wear protective gear
Work in temperatures
below 40 °C
E
Compressor
high-stage side
discharge casing and
discharge piping
Refer to Figure 1-1
Burn injury due to contact
Contact with or inhalation of
hazardous substances
generated by leakage or spout
of refrigerant or the like
Keep away and do not
touch.
Wear protective gear.
Detect gas leakage.
Wear protective gear.
Work at a temperature
of not higher than
40
°
C.
F
Check valves/service
valves and joints on
each section of the
package unit
Contact with or inhalation of
hazardous substances
generated by mishandling or
leakage
Frostbite or burn due to contact
Sufficient ventilation
Indicate valve
open/close state.
Keep away and do not
touch.
Wear protective gear.
Sufficient ventilation
Wear protective gear.
Tagout for controlled
valve
G
Solenoid valves/
electric valves on
each section of the
package unit
Electric shock caused by
contact with live wires or
electrical leakage
Pinched due to contact with
driving part
Install protective cover
on terminals, and
prohibit opening.
Keep away and do not
touch.
Wear protective gear.
Turn off each breaker
and the control power,
and conduct
lockout/tagout.
Wear protective gear.
H
Electric components
in each section of the
package unit (oil
heater, protective
switch, etc.)
Electric shock caused by
contact with live wires or
electrical leakage
Pinched due to contact with
driving part
Install protective cover
on terminals, and
prohibit opening.
Keep away and do not
touch.
Wear protective gear.
Turn off each breaker
and the control power,
and conduct
lockout/tagout.
Wear protective gear.
I
Package unit oil
drains
Contact with hazardous
substances generated by
leakage or spout
Burn caused by contact with
high-temperature fluid
Sufficient ventilation
Keep away and do not
touch.
Wear protective gear.
Sufficient ventilation
Wear protective gear.
Work at a temperature
of not higher than
40
°
C.
J
Noises
Damage caused by noise
Wear protective gear.
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