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Connecting Groove Pipes
CAUTION
Piping damage!
To prevent damage to water
piping, do not overtighten the
connections.
Note: Make sure that all piping is
flushed and cleaned prior to
starting the unit.
CAUTION
Equipment damage!
To prevent equipment damage,
bypass the unit if using an acidic
flushing agent.
Vents and Drains
Install pipe plugs or ball valves,
with National Pipe Thread (NPT)
to water hose thread
connections, in evaporator and
condenser water box drain and
vent connections before filling
the water systems.
To drain water, remove the vent
and drain plugs or open the ball
valves. Install an NPT connectors
in the drain connection, and
connect a hose to it.
50
Installation:
Mechanical
Evaporator Piping
Components
Note: Ensure that all piping
components are between the
shutoff valves, so that both the
condenser and the evaporator
can be isolated.
Piping components include all
devices and controls used to
provide proper water-system
operation and unit operating
safety. These components and
their general locations are
described below.
Entering Chilled-Water Piping
• Air vents (to bleed air from
system)
• Water pressure gauges
manifolded with shutoff valves
• Pipe unions
• Vibration eliminators (rubber
boots)
• Shutoff (isolation) valves
• Thermometers
• Cleanout tees
• Pipe strainer
Leaving Chilled-Water Piping
• Air vents (to bleed air from
system)
• Water pressure gauges
manifolded with shutoff valves
• Pipe unions
• Vibration eliminators (rubber
boots)
• Shutoff (isolation) valves
• Thermometers
• Cleanout tees
• Balancing valve
• Pressure relief valve
• Flow switch
CAUTION
Equipment damage!
To prevent evaporator damage,
do not exceed 150 psig (1035
kPa) evaporator water pressure
for standard water boxes. The
maximum pressure for high-
pressure water boxes is 300 psig
(2100 kPa). To prevent tube
damage by erosion, install a
strainer in the evaporator water
inlet piping.
CVGF-SVN02B-E4
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