Temperature Sensors
Water Sensor
This sensor is used to measure the pool/spa temperature and is installed in the filtration plumbing
after the filter but before either the solar or conventionally fueled heaters—refer to the plumbing
overview diagram.
1. Drill a 3/8” (10mm) diameter hole in the PVC piping and remove all chips and burrs.
2. Insert sensor until O-ring collar sits flush on the hole.
3. Position hose clamp over the sensor and gently tighten until O-ring makes an adequate seal.
Do not overtighten.
Air Sensor
Mount the air sensor outdoors. IMPORTANT: The air sensor must not be mounted in direct sunlight.
Solar Sensor (not included)
For solar applications, mount the solar temperature sensor near the solar collector array so that it is
exposed to the same sunlight as the collectors. Use additional cable (20 AWG) if necessary.
Optional Chlorination Function
The OmniPL can generate chlorine using a Hayward chlorinator cell and plumbing kit. These items
are not included with the OmniPL and can be purchased separately at your local Hayward dealer.
Choose a chlorinator cell model based on the size of your pool; models are shown below. In addition
to the chlorinator cell, a plumbing kit (P-KIT) must be purchased. This kit contains the cell unions
and flow switch. Refer to page 13 for plumbing instructions.
T-CELL-940 for pools up to 40,000 gallons
T-CELL-925 for pools up to 25,000 gallons
Optional HL-CHEM Sensing Kit
The HL-CHEM is an ORP and pH sensing kit for the OmniPL. When chlorination is enabled (requires
chlorinator cell, liquid chlorine feeder or tablet feeder), the OmniPL senses the pool’s ORP and pH
levels and generates/dispenses the correct amount of chlorine to keep your pool properly sanitized.
Wiring and plumbing requirements for the HL-CHEM should be considered before installing the
OmniPL. Refer to the HL-CHEM manual for specific installation information. NOTE: OmniPL is not
compatible with AQL-CHEM.
Optional AQL-CHEM2 CO
2
Dispensing Kit
The AQL-CHEM2 is a CO
2
dispensing device that connects directly to the OmniPL. When used with
an HL-CHEM, the OmniPL will sense the pool’s pH level and automatically dispense the correct
amount of CO
2
to control the pool’s pH. Wiring and plumbing requirements for the AQL-CHEM2
should be considered before installing the OmniPL. Refer to the AQL-CHEM2 manual for specific
installation information.
9
USE ONLY HAYWARD GENUINE REPLACEMENT PARTS