6
CGAT-IOM01-EN
Installation
Installation
Verily completion of installation by
reviewing the following procedures.
Unit Dimensions And Weights
These are provided under General
Data on Page 5
Drainage
Locate the unit near a large-capacity
drain to allow system drainage during
unit shutdown or repair.
Location And Clearance
Requirements
1. The surface in to be level and of
sufficient strength to support
the unit.
2. Select a location that will permit
free air flow into the condensing
coils and from the vertical dis
charge. If however, the unit is to be
placed under an overhang, allow at
least 2.0 meters clearance above
the unit to prevent recirculation of
hot discharge air.
3. For ground level installation the unit
should be set on a level concrete
slab 100 mm thick and extending
a minimum of 200 mm beyond the
sides of the unit.
4. Mount vibration isolators to avoid
vibration or noise transmission.
Provide a gravelled apron at least
300 mm wide on all sides of the
slab unless other means are used
to prevent growth of vegetation
close to the unit. The slab should
be located as close to the building
as possible with a minimum
clearance conform to the
submittals in front of air entry and
access panels.
5. Provide a large capacity water drain
near the unit. It is used when the
evaporator in drained for shutdown
or repair. The water circuit is
drained thanks to the evaporator
water connections.
Foundation
Elevate the unit. Ensure the floor or
foundation of the unit is level, solid
and of sufficient strength to support
General Data Page 5 for information
on weights.
Unit water Piping
General Piping Recommendations
Thoroughly flush all water supply
piping before making the final piping
connections to the unit.
CAUTION : If using an acidic
commercial flushing solution,
construct a temporary bypass around
to unit to prevent damage to the
evaporator internal components.
Evaporator water inlet and outlet
types, sizes and locations are shown
in the Dimensional data section page
18-19 Figure 1 on page 7 illustrates
a typical water piping components.
Isolate the water pump from the
system to avoid vibration
transmission. All water piping are to
be insulated to minimize heat gain and
prevent condensation. Use a pipe
sealant or Teflon tape on all threaded
connections.
Net Positive Suction Head
Evaporator water pumps should be
located in their piping systems such
that they operate with a net positive
suction head. This is to reduce the
possibility of pump cavitation and
possible differential aeration in the
water system which can rapidly result
in chiller internal corrosion.
Air Vents
Vents must be installed at high points
in the piping system to facilitate air
purging during the filling process.
Pressure Gauges
Install pressure gauges to monitor
the entering and leaving chilled water
pressure.
CAUTION : To prevent evaporator
damage, do not exceed 350 psig
waterside working pressure.
Shutoff Valves
Provide shutoff valves in the Supply
and Return pipe near the chiller to
allow isolation of the gauge(s),
sensors, strainers, etc., during service.
Thermometers
Install thermometers in the lines to
monitor the evaporator entering and
leaving water temperatures.
Balancing Valves
The is required to establish regulation
and Balancing of the water flow.
Strainer
Install a pipe strainer in the water
return line to protect the components
from entrapped debris.
