Daikin Clima-Flex CLIC Series, Инструкция по установке, эксплуатации и обслуживанию

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Installation and Application Information
HIGH TEMPERATURE OPERATION
CLIC series units for high temperature operation (maximum values at ambient temperature 113°F) 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.
PARTIAL HEAT RECOVERY
Partial heat recovery in CLIC chillers is achieved by adding an auxiliary heat exchanger in the refrigerant circuit of each unit, between
the compressors and condenser coils. The heat exchangers transfer heat from the compressor discharge gas to a separate water loop
that can be used for various heating applications. The heat recovery loop is only available when the chiller is in operation.
The partial heat recovery auxiliary heat exchanger can return water up to 155°F; however, this value cannot be adjusted. The amount of
heat produced can be up to 50% of the rated cooling capacity and is dependent on the cooling load requested, operating temperatures
and the flow rate of water passing through the auxiliary heat exchangers. Please contact a local Clima Flex sales representative for
specific application information.
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CAUTION
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Potable water cannot be used in the partial heat recovery system due to the single-wall construction of the heat exchangers.
Partial heat recovery components supplied by the factory:
• Brazed plate heat exchangers: one in each circuit with water piped in parallel for one inlet and one outlet water connection.
• Insulation of heat exchangers and water piping in the unit.
• Separate temperature sensors for the inlet and outlet water pipes in the heat exchangers.
• Air vent connections on the outlet water piping and drain connections on the inlet water piping.
• Immersion heater for each auxiliary heat exchanger for freeze protection.
Partial heat recovery connections are listed below:
1. An external 3-way valve or variable speed pump in the auxiliary heat exchanger water piping for modulation of flow through the heat
exchangers by the unit controller. The heat recovery water loop pump should also be controlled by the chiller controller.
2. A cleanable strainer with perforations no larger than 0.063” (1.6 mm) diameter should be installed within 5 feet (1500 mm) of pipe
length from the heat exchanger inlet and downstream of any brazed connections, see page 35 for pressure drop. - Water piping
and other parts of the heat recovery water loop should be insulated to prevent heat loss and possible injury due to hot surfaces.
3. Separate 120 volt power supply for immersion heaters. A junction box is provided for a 120 volt power connection.
NOTE: If the partial heat exchanger is drained, the heater must be off to avoid damage to the heat exchanger. The heat
recovery heat exchanger has water in it.
It is recommended that the heat recovery water piping installed above ground include:
• A safety or relief valve and expansion tank installed on the water side to avoid hazards in case of failure of the water temperature
thermostat.
• An additional water tank and water heater in the heat recovery piping loop to control the initial water temperature and improve loop
stability. Typical guidance for loop sizing is for the water volume (in gallons) to be greater than or equal to approximately two to three
times the heat recovery water flow rate (in gallons/minute).
PARTIAL HEAT RECOVERY TO AVOID FREEZING
• The heat recovery condenser is insulated; a factory installed heater will protect the heat exchanger from freezing at ambient
temperatures down to -20°F (-29°C). When the ambient temperature drops to approximately 39°F (3.9°C), the thermostat activates
the heaters. The inlet and outlet piping should be protected against freezing by one of the following methods:
• Install heat tape on all water pipes installed in the field.
• Add freeze inhibitor fluid to the partial heat recovery water loop. If adequate amounts of glycol are supplied, it is not necessary to
feed the heater.