Ports to connect on The Attendant: BUS1 – BUS4 or Heater H1 – H5
Ports to connect on The Attendant Mini: BUS1 – BUS2 or Heater H1 – H2
These devices should only be powered directly from the power center or breaker panel. Do not run electricity through a relay as The Attendant will control the device to turn on/off by using the communication cable.
Pentair UltraTemp ETi Hybrid heat pumps can be controlled using legacy fireman switch/dry contact connections or digital Serial RS485 connections.
Dry Contact/Fireman Switch connections allow The Attendant to control the Heat Pump on/off state to manage a desired water temperature setpoint
Serial RS-485 connections allow The Attendant to control the hybrid heater on/off state to manage a desired water temperature setpoint, select device modes (Gas Heat, Electric Heat, Electric Cool, Both) AND read/report any error codes reported by the unit
Poolside Tech recommends using Serial RS-485 connections whenever possible, however it is not required.
Serial RS-485 Connection (Recommended)
Controlling the Pentair Ultratemp Hybrid heater requires connecting the green and yellow wires from J1 pin 2 and J1 pin 3 to the D- and D+ terminals respectively on one of the communication bus connectors of The Attendant labeled BUS1 through BUS4.
| Pentair MasterTemp ETi | The Attendant |
| Yellow (J1 pin 3) | D+ |
| Green (J1 pin 2) | D- |
- Turn off the power to both The Attendant and the UltraTemp® Heat Pump.
- Connect a two conductor 22AWG cable to pins 2 and 3 on the J1 connector
- Connect the wires to an open Bus port on The Attendant. Be sure to connect per the table above.
- Restore power to the heat pump and The Attendant
Once the wiring is completed you must put the heat pump into remote mode.
- Press the MENU SELECT button to scroll to the Remote Mode screen.
- Toggle the selection by pressing one of the arrows until the screen displays “RS-485.”
- Once the heat pump has been correctly configured, a “heartbeat” indicator will appear on the main screen each time a message is received from the automation system.
Dry Contact / Fireman Switch Connection
Dry contact connection requires you to connect the spade connectors SPA and COM on the heat pump control board to an open heater port on The Attendant. Follow the process below
- Turn off the power to both The Attendant and the hybrid heater pump.
- Run the wires from The Attendant to the electrical compartment.
- Connect wires to the hybrid heater remote control terminals using ¼ in. “Spade” connectors as shown in the image below.
- Connect the other end of the remote control wires to an open Heater port on The Attendant Panel
- Restore power to the hybrid heater and The Attendant
Once the wiring is completed you must put the heat pump into relay mode.
- Press the MENU SELECT button to scroll to the Remote Mode screen.
- Toggle the selection by pressing one of the arrows until the screen displays “Relay.”