AAON ProFit WV Series, Установка, эксплуатация и обслуживание

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Table 3 - Water Connections
Model (WVB-)
Supply and
Return
Connection Size
(in. FPT)
006, 009, 012, 015, 018 1/2”
024, 030, 036, 042 3/4”
048, 060 1”
Water pump must be field sized and installed
between the cooling tower or geothermal
wellfield and self-contained unit. System
must be sized in accordance with the
ASHRAE Handbook. Use engineering
guidelines to maintain equal distances for
supply and return piping and limit bend
radiuses to maintain balance in the system.
Balancing valves, permanent thermometers
and gauges may be required.
Before connection to the unit, flush the water
system to remove foreign material that could
cause fouling. Install a screen strainer with a
minimum of 20 Mesh ahead of the inlet to
prevent fouling and internal tube damage.
Mineral content of the water must be
controlled. All make-up water has minerals in
it and as the water is evaporated in the
cooling tower, these minerals remain. As the
mineral content of the water increases, the
conductivity of the water increases. A bleed-
off (drain valve) must be provided for the
water loop.
Field provided and installed water treatment
program must be compatible with stainless
steel, copper, aluminum, ABS plastic, and
PVC. Batch feed processes must never be
used as concentrated chemicals can cause
corrosion. Never use hydrochloric acid
(muriatic acid) or chlorine as it will corrode
stainless steel.
Water loop piping runs through unheated
areas or outside the building must be
insulated.
NOTE: Ball valves must be installed in the
water supply and return lines for unit
isolation and water flow balancing. All
Installing contractor is responsible for
properly sizing and installing water
system components. Improper fluid
flow due to valves, piping, or improper
pump operation may result in
unacceptable unit operation and void
warranty.
WATER PIPING
Follow national and local codes when
installing water piping. Connections to
the unit must incorporate vibration
eliminators to reduce noise and
vibration and shutoff valves to
facilitate servicing. Supply and return
water piping must be at least as large
as the unit connections and larger
depending on length of runs, rise and
bends.
CAUTION
CAUTION