Safety valves are pressure relief valves sized to protect
the system. Never change the pressure setting or
tamper with the valve. Only the pressure valve
manufacturer or an approved representative is qualified
to make such a change.
Pressure relief valves are to be placed ahead of any
potential blockage point which includes, but is not
limited to, such components as shut-off valves, heat
exchangers, and discharge silencers. Ideally, the
pressure relief valve should be threaded directly into the
pressure point it is sensing, not piped to a remote
location.
Electrical
Before installation, the electrical supply should be
checked for adequate wire size and transformer
capacity. During installation a suitably fused or circuit
breaker disconnect switch should be provided. Where a
3 phase motor is used to drive a vacuum pump, any
unreasonable voltage unbalance between the legs must
be eliminated and any low voltage condition corrected
to prevent excessive current draw.
Connect incoming 3 phase power to the power block
supplied inside the electrical enclosure and tighten to
the torque specified on the side of the power block.
The installation, electric motor, wiring and all electrical
controls must be in accordance with NFPA 70-1992
National Electric code, state and local codes. All
electrical work should be performed by a qualified
electrician. This unit must be grounded in accordance
with applicable electrical codes. See control panel door
for the proper wiring diagram
!WARNING!
High voltage may cause severe personal injury or
death. Disconnect all power supplies before opening
the electrical enclosure of servicing.
!CAUTION!
NEMA electrical enclosures and components must
be appropriate to the area installed.
Guards
All mechanical action or motion is hazardous in
varying degrees and needs to be guarded. Guarding
shall be in compliance with OSHA Safety and Health
Standards 29 CFR 1910,219
and any state or local
codes.
!WA~ING!
Canopy panels and drive guards must be fastened in
place before starting the machine and never
removed before cutting off and locking out the main
power supply.
Water Piping
Water piping must be of adequate size to flow the
required amount of coolant at minimum coolant head
conditions, maximum coolant temperature and
maximum operating horsepower conditions. Failure to
adequately cool can result in short life, restrictions in
filter elements, reduced heat transfer and fires.
Coolin9 Water
Cooling water should be clean and cool. Scale forming
or corrosive water will shorten the life of water cooled
coolers.
If there is any doubt about the condition of the
water have it ana!yzed. It maybe necessa~ to add a
water treatment system andlor revise the cooling
system. L’nder some conditions the life of the water
cooled cooler can be extended by changing to a water
cooled coder of different material.
Page 37
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