6 Zone Heating System

September 29, 2019

I have 5 heating zone to control and domestic hot water in total i have 6 zone heating system, Four zone are on first floor with wired thermostat treated as single zone, ground floor zone with Nest wireless thermostat and domestic hot water with wired thermostat. I have 3 relays (1 for each zone) for upstairs and downstairs with electric zone valve, so when the thermostat close then zone valve power up and open zone and send 220 to zone contractor (multicontactor) that close a non power circuit insulted that triggers the boiler, I have done this circuit when my old 3 zone pcb burned out.

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My PiHome Installation

To take full advantage of PiHome and its ability of controll multi zone heating system i went one step further to add manifold for upstairs to divide each room as separate zone so re-plumbing was done (see image below). After re-plumbing I have a manifold and actuators with 4 zone for bedrooms in one location and for downstairs and hot water 2 zone valves close to the manifold. Under floor heating manifold now controlled by PiHome as you can see on top right side my PiHome wireless zone controller.

PiHome – Bogdan’s User Story – Under floor heating Manifold

PiHome web interface configuring all zone and zone controller with wireless temperature sensor.

My PiHome Web Interface with all Zone

My PiHome Heating Schedule for my Zone

Here is your configuration for your Zone controller and temperature Sensors. First 3 Digits are for Controller ID, Second Digit for Relay Number and Last two digits are for wireless Channel Number.

Zone Controller ID: 101

Master Bed 101-1-91
Sma’s Bed 101-2-91
Miru’s Bed 101-3-91
Guest Bed 101-4-91

Controller ID: 102

Downstairs 102-1-91
Hot Water 102-2-91
Boiler 102-4-91

Temperature Sensors

Master Bed 21-0-91
Sma’s Bed 22-0-91
Miru’s Bed 23-0-91
Guest Bed 24-0-91

Downstairs 20-0-91
Hot Water 30-0-91

Old Setup

My Old setup can be seen in below images and how it was controlled from wired and wireless thermostats.

PiHome – Bogdan’s User Story 3 Relay

My old system was controlled by a basic timed zones controller throughout the basic thermostats.

My old basic timed zones controller