Pentair EasyTouch Load Center Wiring
The EasyTouch load center is the central hub where all pool equipment wiring terminates. Understanding how each section is laid out — main power, relay outputs, COM port, sensor inputs, and accessory connections — is essential for installation, troubleshooting, and service work. This guide covers wiring for both EasyTouch 4 and EasyTouch 8 models.
De-Energize Before Wiring
Always turn off the main breaker feeding the load center and verify with a multimeter that voltage is absent at all terminals before connecting or disconnecting any wiring. The load center contains 120V and 240V circuits that can cause serious injury or death.
Load Center Overview
The EasyTouch load center is a metal enclosure with power relays, transformer, and circuit breakers. It includes a built-in sub-panel for distributing power to pool equipment. The enclosure is divided into a low-voltage compartment at the top and a high-voltage compartment at the lower right. The low-voltage raceway runs vertically on the left side of the load center for low-voltage cabling.
| Feature | EasyTouch 4 | EasyTouch 8 |
|---|---|---|
| Filter pump + auxiliary relay circuits | FLTR PUMP + AUX 1–3 | FLTR PUMP + AUX 1–7 |
| Maximum scheduled programs | 12 total across all circuits | 12 total across all circuits |
| Feature circuits | FEATURE 1–8 | FEATURE 1–8 |
| Valve actuator outputs | Valve A (J17/Solar socket), Valve B | Valve A (J17/Solar socket), Valve B |
| Transformer outputs | 12 VAC, 18 VAC, 24 VAC | 12 VAC, 18 VAC, 24 VAC |
Main Power and Relay Outputs
The relay connectors plug into the top edge of the EasyTouch motherboard and are labeled for each circuit:
- FLTR PUMP: Filter pump relay
- AUX 1–AUX 3 (EasyTouch 4) or AUX 1–AUX 7 (EasyTouch 8): Auxiliary circuit relays
Special-purpose relay outputs on the motherboard include:
- ELEC HTR: Electric heater relay output
- 2-SPD: Two-speed pump high-speed relay (connects to 2-Speed relay)
- SOLAR (J17): Solar booster pump output; also used as AUX EXTRA if solar is not configured
Route load wires from the relay output terminals to the equipment power inputs. The high-voltage compartment in the lower right section of the load center contains the relay terminals, circuit breakers, and GFCI protection.
COM Port Terminal Block
The COM port is a 4-pin RS-485 terminal block on the EasyTouch motherboard. It is used to connect the following accessories: iS10 and SpaCommand spa-side remote, UltraTemp heat pump, EasyTouch Indoor Control Panel, IntelliChlor, IntelliChem, IntelliFlo pump, and QuickTouch QT4 RF transceiver.
| Pin | Wire Color | Signal |
|---|---|---|
| PIN 4 | Red | +15 VDC |
| PIN 3 | Yellow | +DATA |
| PIN 2 | Green | −DATA |
| PIN 1 | Black | Ground |
Keep COM cable runs away from high-voltage wiring. The IntelliFlo RS-485 communication cable is P/N 350122 (50 feet).
Note for UltraTemp heat pump: On the UltraTemp AutoSet board, connect only PIN 3 (yellow, +DATA) and PIN 2 (green, −DATA) to the EasyTouch COM port. Do not use PIN 1 or PIN 4 on the UltraTemp board.
Temperature Sensor Connections (J21)
All three temperature sensors connect to the J21 connector on the EasyTouch motherboard. Each sensor is a 10 kΩ thermistor — polarity does not matter (the two sensor wires are interchangeable). Sensor connections are labeled WATER, SOLAR, and AIR.
| Sensor | Mounting Location | Function |
|---|---|---|
| Water sensor | Sensor well fitting in return line plumbing | Heater control; water temperature display |
| Solar sensor | Solar collector panel (connect wires to SOLAR screw terminals per wiring diagram) | Solar priority control |
| Air sensor | Near or under the load center enclosure, not inside it | Freeze protection (activates at 36°F) |
The error messages that appear when sensors are disconnected or failed are displayed in the Diagnostics menu:
- Air Err — air sensor not connected to J21
- Air Temperature Err — same cause, shown in Diagnostics menu
- Water Temperature Err — water sensor not connected to J21
- Solar Temperature Err — solar sensor not connected to J21
Gas Heater Connections
Gas heaters (MasterTemp, MaxFlo) connect to the GAS HEATER connector (J19) on the EasyTouch motherboard for remote-control operation or fireman's switch connection. Do not bypass the heater's internal thermostat, high-limit switch, or other safety devices when wiring the heater connection.
Valve Actuator Connections
The EasyTouch motherboard provides two valve actuator outputs:
- Valve A (J17 / VLV A socket): Dedicated to solar heating valve actuator when solar is enabled. If solar is not configured, J17 becomes AUX EXTRA and the Solar button on the outdoor control panel switches it on and off.
- Valve B (VLV B socket): Can be assigned to any circuit via Menu > Settings > Valves.
Plug the solar valve actuator cable into the three-pin socket marked VLV A on the EasyTouch motherboard. The return valve and intake valve actuators plug into their respective labeled sockets (RETURN and INTAKE).
iS4 Spa-Side Remote Connections
The iS4 and iS10 spa-side remotes (and SpaCommand) connect to the EasyTouch COM port. These remotes use a cable limited to 150 feet. The iS4 connects to the COM port via the Spa-Side Remote 1 connector (J20). Up to four iS4 and iS10/SpaCommand remotes can be connected to an IntelliTouch system; the EasyTouch similarly supports the iS4 and iS10 via the COM port.
First-Time System Check
Before powering up the EasyTouch load center for the first time, verify the following plugs are correctly seated on the EasyTouch motherboard:
- Relay connectors — FLTR PUMP, AUX 1–7 (EasyTouch 8) or AUX 1–3 (EasyTouch 4)
- Temperature sensor connectors — WATER, SOLAR, AIR (at J21)
- Transformer wire harness — J1
- Heater control connector — ELEC HTR and GAS HEATER (J19)