Daikin Clima-Flex CLIC Series, Installation, Operation And Maintenance Manual

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Case 4. Open protection walls
Decorative walls are often used to help conceal a unit, either on
the ground or on the roof. Whenever possible, design these walls
so that the combination of their open area and distance to the unit
does not require a performance adjustment.
If the percentage of wall openness is less than recommended for
the distance to the unit, it should be considered a solid wall. The
wall height is assumed to be equal to or less than the height of the
unit when mounted on its base bracket.
If the wall height is greater than the unit height, (refer to Case 5:
Pit Installation) for performance adjustment factors. The distance
from the sides of the unit to the side walls must be sufficient for
service, such as opening the control panel doors. In the case of
uneven wall separation, the distance from the unit to each wall
can be averaged as long as no distance is less than 4 feet. Values
are based on walls on all four sides.
Case 5.
Pit installation
Pit installations can cause operating problems due to recirculation
and air restriction and require that sufficient air separation be
provided, safety requirements be met, and service access be
provided.
A solid wall surrounding a unit is substantially a pit and this datum
should be used. Sometimes a steel grating is used to cover a pit
to prevent accidental falls or trips into the pit.
The grate material and installation design should be strong
enough to prevent such accidents, but should provide plenty
of open area to prevent recirculation problems. Have the Clima
Flex sales representative review the installation of any pit prior to
installation to ensure that it has sufficient airflow characteristics
and is approved by the facility’s design engineer to avoid the risk
of an accident.
Figure 5. Three or more units, side by side
Figure 4. Two units side by side
Case 3. Three or more units, side by side
For all models, there must be a minimum distance between units
placed side by side; however, performance may be affected at
this distance. Minimum distances are: models 28 to 75 RT - 4 feet,
models 75 to 100 - 5 feet, models 125 to 250 - 6 feet.
Installation and Application Information
Figure 6. Pit installation
COLD WATER PIPES
!
CAUTION
!
To prevent damage to the evaporator and possible failure of
the chiller, a supply filter is required in the inlet water piping
that connects to this evaporator. This filter must be installed
prior to operation of the chilled liquid pumps.
Field-installed water piping for the chiller should include:
• A cleanable filter installed at the water inlet to the evaporator
to remove debris and impurities before they reach the
evaporator. Install the cleanable filter within 1,500 mm tubing
length from the evaporator inlet connection and downstream
of any solder connections (no solder connections between the
filter and evaporator). CLIC models 025-250 require a filter
with perforations no larger than 0.063” (1.6 mm) in diameter.
For more information, refer to the inlet strainer guidelines (
page 14).
•
• A water flow switch must be installed in the horizontal piping of
the supply water line (evaporator outlet) to prevent evaporator
freezing under low or no flow conditions. The flow switch can
be ordered as a factory-installed option, as a field-installed
kit, or can be supplied and installed in the field.
• Piping for units with brazed plate evaporators should have
a drain and vent connection at the bottom of the bottom
connection piping and at the top of the top connection