From wiring to warmth.

Before you start

This guide covers system planning and the controls used to commission installed Ampernova hardware. The plant controller manages the actuators, circulation pumps and mixing valves; each wall thermostat supplies room temperature, humidity and demand over the T-Bus.

Plan the circuits

Record the physical relay that drives each room’s ceiling and floor actuator. Use the zone pin callouts for wiring and the same zone name for the thermostat selection. An address consists of a bank, A or B, and a channel, 0 to 6.

There are 14 actuator outputs and up to 14 thermostat identities. Separate ceiling and floor actuators in one room use two outputs. Seven rooms with two separate circuits each, for example, use all 14 outputs.

Plan one coordinating thermostat

A thermostat’s identity is the smaller non-zero of its two circuit addresses. The unit assigned A0 on either circuit becomes the leader. Its menu includes the system-wide Mode, Fabric and Dew settings. Plan exactly one leader and avoid assigning an output to more than one thermostat.

The Ceiling and Floor menus identify the circuit’s purpose; the bank and channel identify its physical relay. Do not infer a circuit’s function from the bank letter alone.

Connect the system

Start with the whole-system schematic, then use the equipment wiring callouts for the 24 V supply, thermostat bus, probes and mixing valves. Follow the zone assignments for room actuators and the pump and neutral callout for the relay common.

1. Check the installed plant. Confirm the hydraulic circuits, actuators, mixing valves, pumps and temperature probes match the design. Follow the equipment instructions for filling, venting and electrical checks.
2. Connect and label the controller outputs. With supplies isolated, follow the board wiring sheet and relay schedule. The pump connector’s bottom contact takes the common neutral feed for all relays. Connect the two pump outputs by their numbered pin assignments in the pump callout. Mixing-valve return-voltage feedback is optional. For fitting, left/right pipe layouts and polarity checks, use the mixing valve and actuator installation guide.
3. Connect the thermostats to the T-Bus. Connect either bus wire to either thermostat terminal; the thermostat connection works in both directions. Follow the specified cable, supply and termination requirements for your boards. The T-Bus uses a custom protocol; a generic Modbus controller is not a substitute for HeatingMain.
4. Fit the room thermostats and plant probes. Use the hardware mounting instructions and planned sensor locations. Label each thermostat with its room and each actuator with its output.
5. Inspect before applying power. Complete the hardware-specific electrical checks, then power the system according to its wiring sheet. Verify the thermostats refresh and respond to touch.

Assign the thermostats

Use the thermostat’s own screen. Tap the hamburger icon to open the menu at Info. Use Up and Down in the left navigation column to move between screens; the adjacent item icons show your position. Tap Home to return to the room temperature.

1. Open Ceiling. Select the bank and channel printed on the board for the room’s ceiling output. For example, select A and then 3 for A3. Select NC if no ceiling circuit is connected.
2. Open Floor. Select the zone printed on the board for the room’s floor circuit, or NC if it is not connected.
3. Check the displayed address after each change. A complete bank/channel selection writes immediately. A bank selected with no channel does not save a new address; NC takes effect immediately. If a channel is already selected, switching banks changes the complete address immediately.
4. Confirm the leader. On the thermostat with A0 assigned, check that Mode, Fabric and Dew appear in the menu. The leader’s home-screen top band is inverted. Other thermostats have Info, Version, Ceiling and Floor.
5. Record the room details. Open Version to read the firmware version, relay address pair and hardware UID. Record them with the room and actuator labels, then repeat for each thermostat.

Commission the plant

Set the operating mode on the leader

On the A0 thermostat, open Mode and choose Heat, Cool, Auto or Off to suit the installed plant and commissioning task. This is a system-wide choice: follower thermostats follow the plant’s season. Each room retains its own temperature targets.

Verify the readings and each circuit

1. Check room and plant readings. Confirm plausible temperature and humidity in each room. Open Info to inspect the buffer tank and both mixing valves. Resolve missing or implausible probe readings before testing heating or cooling.
2. Request heat in one room. In Heat mode, tap the temperature or the bottom-right setpoint to open the setpoint dial. Raise the target enough to create demand. Confirm the intended actuator responds and that another room’s output is not being driven.
3. Allow the system time to respond. Thermostats communicate in a 60-second bus round. Each circuit’s pump starts only after one of its valves has been commanded open continuously for three minutes. Demand changes also have an anti-chatter hold, so repeated rapid setpoint changes are not a useful test.
4. Check both circuits where fitted. The floor carries the primary heating demand; the ceiling joins at higher demand. Confirm that actuator labels, thermostat assignments and actual flow agree for each circuit.
5. Check cooling where supported. With a cooling-capable plant, select Cool on the leader and lower a ceiling-equipped room’s target to create demand. Verify ceiling operation. The floor pump must remain off; floor-only rooms do not cool.
6. Restore the intended settings. Return to the agreed operating mode and room targets. Check for active errors before moving to handover.

Use the thermostat’s bottom-left circuit indicators to inspect valve and pump state. Tapping them cycles between the normal view, relay addresses and the 48-hour open-percentage view.

Add the connected extras

Local operation does not require these steps. Complete the plant and room checks first. The wall thermostats communicate over the T-Bus; the plant controller provides the Matter bridge.

Matter smart-home setup

1. Prepare the compatible Matter controller and the network it requires for the installed plant controller.
2. On the A0 thermostat, select Fabric, then the MASTER tab. Tap START COMMISSIONING in the content area. Selecting the tab alone does not start pairing.
3. Wait for the plant controller’s QR code and manual pairing code, then follow the smart-home app’s add-device flow. The request has a 70-second timeout; if it expires, use TAP TO RETRY.
4. Check that the expected physical thermostats appear, and label their rooms. System mode remains controlled through the leader; other rooms follow the plant.

Owner portal

On the leader’s Fabric screen, select PORTAL, then tap GET PORTAL QR. When the QR arrives, scan it or open the displayed apnv.cc/p/… address and follow the portal flow. This online service needs the relevant network connectivity. Keep the portal access link with the owner’s records, rather than in a public installation photo.

Local Home Assistant integration

The controller also supports MQTT with Home Assistant discovery on the local network. This requires a reachable MQTT broker and controller network/broker configuration. Use the configuration for the installed firmware; the thermostat’s Fabric screen does not configure MQTT.

Troubleshooting on site

Record the room, both relay addresses, firmware version and hardware UID from Version, together with the displayed error. An error QR on the home screen links to the corresponding diagnostic address.

The handover checklist

Work through these checks with the homeowner and retain the completed printout with the room schedule. Checks are for this page session only; they are not saved as an installation record.