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5.3.3 Flow Switch (D1)
Digital Input (D1) has been reserved for the Flow Switch input. Changing this designation may affect
controller function. Refer to section 3.5.
Settings associated with this input have been preset at the factory prior to shipment. When system pump is de-
energized (no water flow, switch is open) “No Flow” message is displayed on the Home Screen. “No Flow”
warning message also appears at the top of the Home Screen. When system pump is energized (water flow,
switch is closed) “FLOW” is displayed on the Home screen. Contact Evapco Water Systems before
adjusting settings associated with this input.
5.3.4 Water Meters (optional)
Digital Inputs D2 and D3 have been reserved for contacting head water meters (Flowmeters). Settings
have been configured at the factory.
Factory Default Settings:
Item
Setting
Volume/Contact
100 gallons
Flow Units
Gallons
Ensure the input being configured is connected to the correct point on the interface board. Water meter #1
is (D2), Water meter #2 is (D3).
To change the Factory default settings;
Select the Main Menu icon from the Home Screen.
Select the Inputs icon.
Select appropriate Flowmeter input (D2) or (D3).
Select the Tool icon to set measurement parameters.
Select the Tool icon to modify the Volume/Contact appropriate to the meter.
Select the appropriate units of volume flow will be measured. Gallons is the factory default unit. If
units of volume other than gallons is selected, the controller automatically performs conversion to
the volume unit selection.
5.3.5 Other Digital Inputs
Digital Inputs D4, D5 and D6 have been reserved for Pulse~Pure status functions. Do not attempt to
modify settings or designations associated with these inputs without prior approval from Evapco Water
Systems.
5.4 Outputs
Relay outputs R1, R2, R3, R4 have been reserved for Pulse~Pure status functions. Do not attempt to
modify settings or designations associated with these inputs without prior approval from Evapco Water
Systems.
5.4.1 Bleed (R5)
When the controller measures a conductivity value equal to, or greater than, the Set Point the Bleed relay is
powered causing a connected valve to open. The relay remains powered until the conductivity measured is less
than the set point minus the dead band setting. For example, if the Set Point is 1000µS/cm and the Dead Band
is 50µS/cm the bleed relay is energized, causing the connected bleed valve to open, when the measured
conductivity is ≥1000µS/cm. The relay remains powered until the measured conductivity is ≤ 950uS/cm.
The Bleed (Blowdown) relay is assigned to Relay 5 (R5). Changing this designation may affect its operation
in the field. Set point, Dead band and Hand/Off/Auto settings are available for field adjustment.