Section III - Installation
Electrical
Before installation, the electrical supply
should be checked for adequate wire
size and capacity. During installation,
a suitable fused disconnect switch with
semiconductor fuses (AJT or LPJ type) or
circuit breaker should be provided. Any
unreasonable voltage unbalance (5%)
between the legs must be eliminated
and any low voltage corrected to prevent
excessive current draw. The installation,
electric motor, wiring and all electrical
controls must be in accordance with
National Electric Code, and all state
and local codes. A qualified electrician
should perform all electrical work. Air
compressors must be grounded in
accordance with applicable codes. See
control panel for the proper wiring
diagram.
Quincy Compressor would like to
emphasize the importance of providing
adequate grounding for air compressors.
The common practice of grounding units
to building structural steel may not actually
provide adequate grounding protection, as
paint and corrosion buildup may exist.
Caution!
NEMA electrical enclosures and
components must be appropriate to
the area in which they are installed.
Pneumatic Circuit Breakers or Velocity
Fuses
The Occupational Safety and Health Act,
Section 926.303 Paragraph 7 published
in Code of Federal Regulations 29 CFR
920. (revised 07/0/982), states “all
hoses exceeding /2” inside diameter
shall have a safety device at the source of
supply or branch line to reduce pressure in
case of a hose failure.” These pneumatic
safety devices are designed to prevent
hoses from whipping, which could result in
a serious or fatal accident.
Guards
All mechanical action or motion is
hazardous in varying degrees and needs to
be guarded. Guarding shall comply with
OSHA Safety and Health Standards 29 CFR
90.29 in OSHA manual 2206 (revised
/07/978) and any state or local codes.
Manual Vent and Shutoff Valve
Install a manual valve to vent the
compressor and the compressor discharge
line to atmosphere. If the air receiver tank
services a single compressor, the manual
valve can be installed in the receiver.
When a manual shutoff valve (block valve)
is used, a manual valve should be installed
upstream from the valve, and a pressure
relief valve installed upstream from the
manual vent valve. These valves are
to be designed and installed to permit
maintenance to be performed in a safe
manner. Never substitute a check valve for
a manual shutoff valve (block valve) if the
purpose is to isolate the compressor from a
system for servicing.
Quincy Compressor-QGV Series
5
Summary of Contents for QGV Series
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