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INSTALLATION
19
Connecting the #75001 Pool Chemistry Controller ORP and pH Sensors
The ORP and pH sensors are packaged with liquid filled protective caps. To avoid premature failure or damage, it is necessary to
ensure that the sensor tips are always kept wet, using normal pool water.
1. Before inserting the sensors, ensure that all hoses are properly connected to the flow cell, manifold, and pu mp inlet
plumbing.
2. Start the pump to fill the flow cell with pool water and check for leaks. Turn the pump off when water starts to flow out
of the pH and ORP sensor mounting holes, but leave the valves opened so the water can drain down some.
3. Remove the sensors from the caps, remove the old Teflon tape, and rew rap with new Teflon tape (2 - 3 tur ns) .
4. Thread the senso rs into the mounting holes and connect the BNC connectors to the appropriate locations as described
below (place the storage caps in the cap holders).
When shipping or storing the sensors, fill the protective caps with normal pool water prior to securing the caps onto the sensors.
Tighten the caps and store in a safe location.
The ORP and pH sensors are connected to the #75001 Pool Chemistry Controller electronic processor using BNC connectors.
These are designed to install and lock into position. The sensors and connectors are marked for ORP and pH.
Electrical Connections
Connecting the #75001 Pool Chemistry Controller
(Turn off power before making any electrical connections)
The #75001 Pool Chemistry Controller is provided with an attached interface cable, similar to a telephone cable, which plugs
directly to the base of the #75003 Pool Pilot Digital Control unit, where indicated in the diagram below (#75001 Pool Chemistry
Controller Terminal). This allows communication between the Poo l Chemistry Control unit and the Digital Con trol unit.
#75003 Digital Control Panel Base Plate
#75001 Pool Chemistry
Controller Terminal
Ground Lug #75008 Auxiliary Relay Terminal
From #75001 Pool Chemistry Controller
•
Move the plastic cover to reveal the metal
BNC connector.
• Slide the BNC connector onto terminal
and twist the lock knob clockwise to lo ck
in place.
• Slide the plastic cover back over the metal
BNC connector once in stalled.
• Or twist the lock knob counterclockwise
and slide down to remove.
#75001 Pool Chemistry Controller
Electronic Processor Box
pH (white ring) ORP (black ring)
pH
Sensor
ORP
Sensor