Service Adjustments - Quincy QGV-100 Instruction Manual

Service Adjustments

Water Temperature Regulating Valve (75
& 100 hp, water-cooled units only)
The water
temperature
regulating valve
senses fluid
temperature and
opens or closes,
regulating water flow
from the unit. It is
factory set to maintain
80°F discharge
temperature.
Due to variations
of incoming water temperatures and/or
pressures at each location, check valve
adjustment during start-up to maintain
80°F discharge temperature.
• To increase fluid temperature: turn the
adjustment screw clockwise to decrease
water flow.
• To decrease fluid temperature: turn the
adjustment screw counterclockwise to
increase water flow.
Water-cooled Heat Exchangers
Most water-cooled heat exchanger
problems result from underestimating the
importance of water treatment and heat
exchanger maintenance. Cleaning the
heat exchanger tubes on a regular basis
and providing a clean, soft and/or treated
water supply will ensure the efficient, long
service life of the heat exchangers.
Impurities in the cooling water supply
can impact the service life of the heat
exchanger. It is strongly recommended
that a reputable, local water treatment
company be engaged prior to start-up to
establish the corrosion, scale forming and
fouling tendency of the cooling water and
remedy the situation if a problem does
exist.
Failure to develop a water treatment
p l a n m a y r e s u l t i n i n c r e a s e d
maintenance and operating expense,
reduced equipment life and emergency
shutdown.
Water treatment may involve filtration
(screening) to remove debris, sand and/or
silt in the water supply or, in more severe
cases, chemical treatment methods may
be necessary to inhibit corrosion and/or
remove suspended solids to reduce the
water's tendency to form scale deposits or
prevent growth of microorganisms.
The normal maintenance program for
the unit should include periodic cleaning
of the tube side (water side) of the heat
exchanger to remove deposits that
enhance fouling and corrosion.
The user is responsible for ensuring
adequate water quality and keeping the
heat exchanger clean. Heat exchanger
failure caused by plugging or corrosion
is not covered by warranty.
Quincy Compressor-QGV Series
Section V - Servicing
notiCe!
notiCe!
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