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EGW06-PCPEG-20140813
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Section V: Operation
ECC-PCP NETWORK OPERATION
Networked ECC-PCP units operate in a MASTER/SLAVE environment. This means that one unit (master) determines
heating, cooling, and dehumidification requirements and broadcasts them on the network to the other units (slaves).
This ensures that all units work together instead of against other. Each networked unit contains all sensor and controls
necessary for independent operation and is capable of acting in the master role. Units on the network are identified by
a number between one and four. The unit with the lowest identification number having no uncleared alarms will be the
master unit.
If an alarm condition occurs in the master unit, it will give up the role of master. The unit with the next lowest
identification number and no unclear alarms will take over the master role. The unit that experienced the alarm condition
will operate in the slave role until the alarm is cleared at the control panel.
The control panel provides two network status screens. These can be accessed in the detailed status menu. The figure
above shows the first screen that displays the status of units one through four as present or not. Use this screen to verify
that all units on the network are connected and communicating with each other. The figure below shows the second
screen that displays network information for the unit that is being displayed by the remote interface unit, including
network role, connection status and network identification number.
NETWORK CONFIGURATION
Using the following four parameters, it is possible to configure the ECC-PCP network to accommodate a wide variety of
installation options. Network configuration can be accessed in the service menu. These parameters must be set in each
unit individually.
Pool Water Temperature Control
Determines whether the unit will control water temperature based on the master’s command (NETWORK) or its own
temperature sensor and set point (LOCAL). If a unit set to LOCAL becomes the master, other units in the network will
not use the master’s command for water heating. They will look to the next line that is not set to LOCAL. This parameter
is only set to LOCAL if the unit is connected to a different pool than the rest of the units on the network. Because the
unit is controlling water temperature on its own, it is necessary to select the correct unit with the control panel before
changing the water temperature set point.
Staged Dehumidification Control
Determines whether the unit will run in dehumidification when there is a need for 1 stage or 2 stages of dehumidification.
The master unit will start on any need for dehumidification independent of this parameter. Slave units with this parameter
set to YES will dehumidify only if the master is asking for 2 stages of dehumidification. Setting this parameter to NO
will cause the unit to dehumidify when the master calls for at least 1 stage of dehumidification. Using this parameter, it is
possible to configure the number of units in each dehumidification stage.
Dehumidification Stage 2 Offset
Determines how far the dewpoint (relative humidity) of the space has to rise above the set points before the unit will
request 2 stages of dehumidification on the network. This parameter is normally the same in all units on the network.
Making this parameter smaller will bring on the second stage of dehumidification sooner.
Enable Network Control
Determines whether the unit will participate in the master/slave environment. Setting this parameter to NO will cause the
unit to act like a standard ECC-PCP single unit. The unit will never become the master on the network and will not listen
to the demands broadcast by the master on the network. Although units with this parameter set to NO do not participate
in the master/slave environment, they are still accessible through the network control panel. Like the LOCAL pool
