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13
Installation and Application Information
GLYCOL SOLUTIONS
The use of glycol can affect system performance depending on
its concentration and should be taken into account during initial
system design. When glycol is added to the chilled water system
to protect against freezing, it should be noted that the refrigerant
suction pressure will be lower, the cooling performance will
be lower and the water side pressure drop will be higher. The
reduction in performance depends on the glycol concentration
and temperature. Test the coolant with a clean and accurate
glycol refractometer to determine the freezing point.
!
CAUTION
!
The installed glycol level must match the nominal glycol
percentage indicated on the submitted chiller technical data
sheet. Failure to meet the nominal glycol percentage may
result in damage to the unit and loss of unit warranty.
!
CAUTION
!
Do not use automotive grade antifreeze. Industrial grade
glycols should be used. Automotive antifreeze contains in-
hibitors that will cause plaque formation on the cooler evapo-
rator copper tubes. The type and handling of the glycol used
should be consistent with local codes.
and wiring of the water flow switch are provided in the unit control
center.
Wire from the Y and R terminals on the switch to the terminals on
the unit control panel shown in the field wiring diagrams, page 19
through page 22. Mount the flow switch on the outlet water line
to shut off the unit when water flow is interrupted. A flow switch
is an equipment protection control and should never be used to
cycle the unit.
Installation should be in accordance with the manufacturer’s
instructions included with the switch. Flow switches should be
calibrated to shut the unit off when operating below the minimum
flow rate.
There is also a set of paddle switch contacts on the switch that
can be used for an indicator light or alarm to indicate when a
“no flow” condition exists. Protect any flow switch that is installed
outdoors from freezing. It is not recommended that differential
pressure switches be installed outdoors. They may freeze and not
indicate a no-flow condition.
HIGH TEMPERATURE OPERATION
CLIC STAND ALONE series units for high temperature operation
(105°F to 125°F, 40°C to 52°C) require the addition of the optional
high ambient package which includes a small fan with a filter on
the air inlet to cool the control panel. All units with the optional
VFD low ambient fan control automatically include the high
ambient option.
Note that in cases of high ambient, the capacity may be reduced
or the lower outlet water temperature settings may be outside
the chiller’s operating envelope; consult with a Clima Flex sales
representative to ensure that the chiller is capable of the required
elevation.
CONDENSER COIL OPTIONS AND COATING
The standard CLIC STAND ALONE Series chiller coils have an
aluminum alloy microchannel design with a series of flat tubes
containing multiple parallel flow microchannels placed between
the coolant manifolds. The microchannel coils are designed to
withstand the synthetic acidified seawater acidified (SWAAT) mist
test of over 1000 hours (ASTM G85-02) at 120°F (49°C) with 0%
loss and without developing leaks.
Epoxy coating:
is an extremely flexible and durable water-based
polymer coating that is uniformly applied to all coil surfaces by
a multi-step electrostatic submerged coating process. Epoxy-
coated coils offer ASTM B117-90 salt spray resistance of more
than 10,000 hours applied to both the coil and the coil heads.
Epoxy-coated coils also receive a UV-resistant urethane topcoat
to provide superior resistance to degradation from direct sunlight.
Table 2. Coil and coating selection matrix
Coil Option
Non-
corrosive¹
Unpolluted
marine²
Industrial³
Combined
marine-
industrial⁴
Standard
+++
-
-
-
Microchannel
+++
+++
+++
++
Notes:
1.
Non-corrosive environments can be estimated by the
appearance of existing equipment in the immediate area
where the chiller is to be placed.
2.
Marine environments should take into account the prox
-
imity to the coast, as well as the prevailing wind direc-
tion.
3.
Industrial contaminants can be general or localized, de-
pending on the immediate source of contamination (e.g.
diesel fumes due to proximity to a loading dock).
4.
The marine-industrial combination is influenced by
proximity to the coast, prevailing winds, and general and
localized sources of pollution.
Considerations
