Zen THERMOSTAT Installation Manual

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ZEN THERMOSTATTM

INSTALLER GUIDE

VERSION 3.0 | 16 October 2017

180_1006_03_Zen Installer Manual

CONTENTS

CONTENTS .................................................................................................................................................... 1

INTRODUCTION TO THE ZEN THERMOSTAT .............................................................................................. 2

ZEN Thermostat Technical Specifications .............................................................................................. 3

ZEN Thermostat Features ........................................................................................................................... 5

User Interface Guide ................................................................................................................................. 6

ZEN Thermostat Online Install Guide ..................................................................................................... 10

ZEN Installation Tips and Tricks ................................................................................................................ 11

ZEN HVAC Configuration System .......................................................................................................... 19

Advanced Settings .................................................................................................................................. 22

Typical wiring configurations .................................................................................................................. 24

Network Connectivity .............................................................................................................................. 30

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INTRODUCTION TO THE ZEN THERMOSTAT

ZEN is a new home thermostat that looks beautiful on your wall, is incredibly simple to use and is connected to the Internet so you can control the temperature of your home from your home automation system.

SMART DOESN’T HAVE TO BE COMPLEX

ZEN has no ugly push buttons. Instead we have replaced them with an elegant touch screen which is simple and intuitive and fades into the background when you’re not using it. Instead of screws, ZEN uses magnets to click on and off the wall.

INSTALLATION IS SIMPLE TOO

We believe that simple design is good design. So while it was tempting to just keep adding features, what we realised was that most people just want a beautiful thermostat that is simple to install and easy to use.

The ZEN team devoted as much effort in making the installation process simple and intuitive as they spent on the styling and everyday usage

ZEN FOCUSES ON WHAT REALLY MATTERS, SETTING THE TEMPERATURE OF YOUR HOME RIGHT

We looked at how people use thermostats and we found that complicated units with embedded learning algorithms don’t really work the way people expect. You can spend a lot of time correcting the assumptions it’s made about you. We wanted to avoid this. We didn’t want to create a thermostat that thinks it’s smarter than you. We wanted you to only interact with ZEN when you really need to.

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ZEN Thermostat Technical Specifications

Design

User input Touch interface

Display LED Matrix

Wall mounting Mounting bracket with magnetic connection to main body

Color White body with White display (ZEN-01-WHITE)

Black body with White display (ZEN-01-BLACK)

Setup and Installation

HVAC system rating 24V AC (nominal)

2A max per relay

Battery Life 2 years (on 4 x AA batteries, with typical use)

Continuous operation if a C-wire is connected

Installation Manuals Paper-based quick-start guide

Web-based system setup and wiring guide

Display Language English, French, Spanish

Connectivity

Wireless protocols ZigBee HA1.2 compatible

Firmware upgrade Over-the-air (OTA) upgrade

Compatibility OpenHome approved

SmartThings

SwannOne

Almond+

Securifi

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HVAC system compatibility

Heating System Types Forced Air, Heat pump, Gas, Electric, Millivolt, Hydronic

Heating stages 1 or 2, plus emergency heat

Cooling Systems Heat pump, Evaporative, Hydronic

Cooling stages 1 or 2

Heatpump support Two-stage reversible heatpump (with Auxillary/Emergency

Heat)

Package Contents

ZEN Thermostat Display

Wall-mounting plate

4 x AA batteries

Mounting hardware

Instruction manual

Wall blanking plate

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ZEN Thermostat Features

Display

Wall Plate

Mounting Hardware

Wall blanking plate

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User Interface Guide

User Interface Touchscreen

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Operating Modes

ZEN Thermostat supports setting the following operating modes via the thermostat display:

 HEAT, COOL, OFF, EMER (emergency heat)  FAN AUTO or FAN ON  AUTO (not available by default, must be enabled in advanced settings)

The ZEN user interface automatically adjusts to only show the operating modes that are available for the wiring and HVAC configuration (see later section on ZEN HVAC Configuration for details).

Other functions such as scheduling, economy modes or demand response are controlled through the home automation platform using a touchscreen or smartphone app.

Icon meanings

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LED Display Details

User Preferences

Access the user preferences by removing the unit from the wall

 Center touch to activate options.  Touch right or left to scroll through the preferences.  Touch up or down to modify a preference.  Center touch to confirm.

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Rebooting or Resetting to Factory Defaults

If you are experiencing issues, reboot your display by removing and reinserting a battery. This will retain your configuration settings.

Performing a Factory Reset will reset your HVAC system configuration and all of your preference and advanced settings changes. You should only do this when instructed by a support center assistant.

To restore to factory settings, press the CONFIG button on the back of the main display 20 times. The display will beep five times to confirm the reset.

Cleaning and Maintenance

Clean with a damp cloth only.

Avoid using chemical cleaning agents.

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ZEN Thermostat Online Install Guide

The ZEN thermostat is designed to be installed by DIY customers and HVAC installers. The ZEN online installation guide (www.zenthermostat.com/install) should be the first point of call for any installation. It provides step-by-step instructions for installing and configuring ZEN, which are customised to the specific wiring configuration of the user.

Complex or Unusual Installations

The ZEN Online Installation Guide works for over 90% of install situations. However, if a wiring combination is not recognised, the user is notified.

The next steps are:

1. User provides more information to support centre via email. An image of the existing thermostat wiring is very valuable.

2. Support centre responds with:

o Advice on how to wire up the ZEN thermostat and which configuration code

to use

o If the installation is complex, a recommendation to call a HVAC technician. o If the installation is not compatible with ZEN, a recommendation to return ZEN

to the place of purchase

If there is any uncertainty about the configuration, ZEN recommends calling a HVAC technician

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ZEN Installation Tips and Tricks

Precautions and safety

As with all electrical equipment, the first step in installation should be to turn off the main breaker

The ZEN thermostat works on low voltage systems rated at 24 volts, with a maximum current rating of 2A per relay. This is the common voltage for most furnaces, heat pumps and air conditioning systems.

ZEN will not work on line voltage systems of 110 volts or higher. These systems are typically European systems or electric baseboard systems.

If the wiring is installed in a junction box, it is also likely to be 110V or higher.

Usually, these systems will have thick black, white or red wires connected with wire nuts on the thermostat.

If the HVAC system is not compatible with ZEN, please return ZEN to the place of purchase.

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Removing the existing thermostat main display

Most thermostats allow you to remove the main unit and provide access to a wall plate which holds the wiring terminals

Removing the existing thermostat differs between models. As a first step, refer to your thermostat’s manual for the instructions, but usually includes:

 snapping it off the wall with moderate pressure  undoing small screws  lifting locking tab and rotating the thermostat

If you are unable to pull it off, please refer to your thermostat manufacturer's website or manual for removal instructions.

Some old thermostats contain mercury in a sealed tube. Contact the Thermostat Recycling Corporation at http://www.thermostat-recycle.org/ for information on how and where to properly and safely dispose of your old thermostat.

Wire labelling

There is no single standard for wire colors and thermostat connections. However, most thermostats have terminal blocks with wire labels.

The way in which the old thermostat is wired and labelled is one of the best guides for how to wire up the ZEN thermostat. Correctly identifying the wires that exist ensures that all the functions of your heating and cooling system will be able to be controlled by the ZEN thermostat.

If you are unsure or your wire terminals are unlabeled, tracing the wires back to the HVAC system is the best way to determine what each wire does.

ZEN provides wire labels in the package, which should be used to label the wire before they are removed from the old thermostat terminals.

The ZEN online installation guide provides a detailed description of which label should be applied to which wire.

Once the old thermostat is removed, the best way of identifying wires is through the ZEN labels.

The wiring diagrams provided by ZEN are all based on the ZEN labelling format

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The basic connectors for a home thermostat can be found in the table below:

Terminal

Description

Power side of 24V transformer

Power side of 24V heating switch

Power side of 24V cooling switch

Common side of 24V

Switched power for cooling

Switched power for heating

Switched power for fan

Switched power for second stage cooling

Switched power for second stage heating

Alternate labelling

24C, 24

O/B

Wire preparation and insertion

Disconnecting the wires from the existing thermostat may require a screwdriver to undo the terminals.

Once removed, it is important to check that the wires are in good condition so that they make good electrical contact.

Check wires have between 5/16 - 3/8in (8-10mm) exposed core. If they don’t, you may need to cut and re-strip them.

If you have stranded wire, ensure that all strands are safely captured in the terminal.

If the installation guide has specified that some wires should not be connected, ensure that they are properly insulated.

Emergency heat enable

Reversing valve activation

AUX

O,B

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Link removal and insertion

Many thermostats use links to connect common circuits together.

ZEN does not require re-use of old links. It comes complete with 2 links, which are located on the rear of the main unit.

The links can be removed by pulling gently and inserted by pushing them into place.

Configuration of the links is determined based on the information entered into the online install guide. The function of each link configuration is shown below:

Link 1 and Link 2

 Rc and Rh connected to

common return

 Aux connected to same

return as Rh

 Applies to most single stage

systems and heatpump systems

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Link 1 only

 Rc and Rh on separate return

circuits

 Aux connected to same return

as Rh

 Applies to systems which have

separate heating and cooling equipment

Link 2 only

 Rc and Rh connected to a

single return circuit

 Aux connected to separate

return circuit

 Applies to most heatpump

systems where the auxiliary heat system is separate equipment

No links

 This configuration is never used

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Mounting the ZEN wallplate

The ZEN wallplate should be mounted so that the bundle of wires comes out through the centre of the wallplate.

Use a level to help align the wall plate, then mark the mounting holes on either side.

The mounting hardware supplied in the ZEN package consists of 2 wall anchors and 2 screws. The wall anchors are suitable for use on both drywall and plaster.

Use a 1/4in (6mm) drill bit to drill holes for the wall plugs. Ensure that the wires are kept out of the way when drilling.

Insert the wall anchors into the holes.

Attach the wallplate using the screws provided.

Take note of the orientation arrow which should point upwards.

If your previous thermostat was larger, you may choose to use the blanking plate to cover any unsightly areas.

The blanking plate is sandwiched between the wall plate and the wall and does not require any extra screws to attach.

The blanking plate can be used in either portrait or landscape orientation

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Attaching the main display

ZEN requires 4 AA batteries to operate the main display, even when a C-wire is connected.

If a C-wire is available, the batteries are only used when the unit is off the wall and will last indefinitely.

If no C-wire is present, the batteries will last for 2 years under typical use conditions.

The main display attaches to the wall plate by magnets located at each corner.

Once located, the electrical connection is made between the terminals on the wall plate and the main display.

There is also a small push switch on the rear of the main unit which is used to determine if the main display is on the wall.

When the main display is on the wall, the ZEN user interface allows for setting the temperature and mode of the HVAC system

When the main display is removed from the wall, it enters PREFS mode which allows setting of the thermostat preferences.

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Configuring ZEN

ZEN uses a configuration code to set the important working parameters required by a thermostat. These include the type and number of heating and cooling stages. A detailed description of the ZEN configuration codes is given in the following section.

When first installed, ZEN does not have any configuration set. The display will show “ZEN” until the CONFIG button is pressed and configuration is entered.

This sequence is intended to force the user or installer to determine the correct configuration of the device before they can operate the heating or cooling. This reduces the likelihood of damaging the HVAC system through incorrect installation.

Some existing thermostats have dipswitches that may change the configuration of the existing wire labels. If the thermostat you are replacing has multiple rows of wire labelling, make sure to check for dipswitches that may alter the configuration. Finding the original installation manual will assist you in getting the configuration set up correctly.

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ZEN HVAC Configuration System

ZEN uses a configuration code to set the important working parameters required by a thermostat. These include the type and number of heating and cooling stages.

Basic configuration is suitable for most installations and is highly recommended for DIY installs.

Basic configuration allows the user to enter a 3-digit code which provides all the information required to configure the thermostat.

The first step in setting the basic configuration is to remove ZEN from the wall, turn it over so the rear of the display is accessible, then press the CONFIG button once.

ZEN Basic Configuration Code

The ZEN online installation guide automatically determines the required configuration code based on the following items entered by the user:

 Wiring of the old thermostat  Type of heating system

The configuration code is a 3 digit alpha-numeric code. Each digit has a distinct function:

The possible values for each digit, and their meaning, are shown on the following page.

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Changing the Basic Configuration

Once in basic configuration mode:

 Touch up or down to scroll through the list of configurations  Centre touch to select the configuration  The code will flash to confirm selection  Exit configuration mode by placing the display back on the wall plate.

Effect on User Interface

The ZEN thermostat user interface automatically adjusts to only show the heating and cooling options that are available in the configuration.

As an example, if the configuration is set to 10A (1 stage heating, no cooling, no fan control), then the user will be able to select Heating mode but not Cooling or Fan Control mode.

If the configuration is set to 31P (heatpump heating and cooling with emergency heat and fan control), then the user will be able to select Heating, Cooling, Emergency Heat and Fan Control mode.

Heating Type

The most important heating control parameter that is affected by the heating type is the maximum cycles per hour (CPH) that is used for each heating type. In particular, heatpump systems require fewer cycles per hour to ensure that the compressor is not cycled too often which can cause it to lock up.

Digit Heating Type Cycles per Hour

0 No heating N/A

1 Single Stage, Fuel (Gas or Oil) 6

2 Single Stage, Electric 12

3 Single Stage, Heatpump 3

4 Single Stage, Hydronic 3

5 Not used N/A

6 2 Stage, Fuel (Gas or Oil) 6

7 2 Stage, Electric 12

8 2 Stage, Heatpump 3

9 2 Stage, Hydronic 3

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Cooling Type

Digit Cooling Type Cycles per Hour

0 No cooling N/A

1 Single Stage, Heatpump, Evaporative or Hydronic 3

2 Not used N/A

3 Not used N/A

4 Not used N/A

5 Not used N/A

6 2 Stage, Heatpump, Evaporative or Hydronic 3

7 Not used N/A

8 Not used N/A

9 Not used N/A

Heatpump and Fan Options

Third Digit Fan

Control

A N N N N

B Y N N N

C N Y N N

D Y Y N N

E N N Y N

F Y N Y N

G N Y Y N

H Y Y Y N

I N N N Y

J Y N N Y

K N Y N Y

L Y Y N Y

M N N Y Y

N Y N Y Y

Has Emergency Heating?

Switching changeover valve cools

Has a changeover valve

O N Y Y Y

P Y Y Y Y

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Advanced Settings

Advanced configuration allows a professional HVAC installer to set more detailed system parameters.

Any changes made in

advanced configuration will override basic configuration settings, so it recommended that only a knowledgeable HVAC installer use the Advanced settings.

The first step in setting the advanced configuration is to remove ZEN from the wall, turn it over so the rear of the display is accessible, then press the CONFIG button 5 times.

Changing the Advanced Settings

Once in advanced settings mode:

 Touch left or right to move to the setting items  Touch up or down to change the value for each setting  Center touch to select the setting  The setting will flash to confirm selection  Exit advanced settings mode by placing the display back on the wall plate.

Advanced Settings Using the Online Installation Guide

The recommended method for determining the correct Advanced Settings is through the ZEN online installation guide.

The guide will show an “Advanced Settings” button at the end of the installation workflow.

Click on the blue arrow to enter the advanced settings page.

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Once in Advanced Settings, configure the thermostat using the following steps:

 Select the temperature units (F or C)  Select the desired Settings Type Tab  Use the dropdown boxes to select a Settings Value  Once all settings have been made, change the thermostat settings by inputting the

codes into the thermostat display that correspond to those shown in the Advanced Configuration Codes section at the bottom of the page.

Exit Advanced Settings mode by placing the display back on the wall plate.

Effect on User Interface

The Advanced Settings page automatically adjusts to only show the Settings Types that are determined by the Basic Configuration.

As an example, if the Basic Configuration is set to 10A (1 stage heating, no cooling, no fan control), then only the Heat Stage 1 and Misc Settings tabs will be shown.

If the Basic Configuration is set to 31P (heatpump heating and cooling with emergency heat and fan control), only the Heat Stage 1, Cool Stage 1 and Misc Settings tabs will be shown.

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Resetting the Advanced Settings

The Advanced Settings are retained even when batteries are replaced or an OTA upgrade is made.

If the basic configuration is changed, the Advanced Settings will be lost.

The Advanced Settings can be reset to the factory default by pressing the CONFIG button 20

times

Typical wiring configurations

Wiring Diagram Links

1 stage heating

1 stage heating with emergency heat

CONFIG

Code

10A- 10B 20A – 20B 30A – 30B 40A – 40B

10C – 10D 20C – 20D 30C – 30D

40C –40D

2 stage heating

60A – 60B 70A – 70B 80A – 80B 90A – 90B

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1 stage heating and 1 stage cooling

1 stage heating and 1 stage cooling with emergency

heating

11A – 11B 21A – 21B 31A – 31B 41A – 41B

11C – 11D 21C – 21D 31C – 31D 41C – 41D

1 stage heating and 1 stage cooling

(Separate Rh and Rc wires)

11A – 11B 31A – 31B 21A – 21B 41A – 41B

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1 stage heating, 1 stage cooling and emergency heat

(separate Rh and Rc wires)

2 stage heating and 1 stage cooling

11C – 11D 31C – 31D 21C – 21D 41C – 41D

61A – 61B 71A – 71B 81A – 81B 91A – 91B

2 stage heating and 2 stage cooling

(Separate Rh and Rc wires)

66A – 66B 76A – 76B 96A – 96B

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1 stage heating and 2 stage cooling

16A – 16B 26A – 26B 46A – 26B

1 stage heating and 2 stage cooling, with emergency

heat

1 stage reversible heat pump (heat and cool)

16C – 16D 26C – 26D 46C – 26D

31I

31J

31M

31N

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1 stage reversible heat pump (heat and cool)

with emergency heat

2 stage reversible heat pump (heat and cool)

31K 31L

31O

31P

86I

86J

86M

86N

2 stage reversible heat pump (heat and cool)

with emergency heat

86K 86L

86O

86P

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2 stage reversible heat pump (heat and cool)

with emergency heat (separate Aux and Rh return)

86K 86L

86O

86P

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Network Connectivity

Compatibility

ZEN Thermostat is ZigBee HA 1.2 compatible and is continually being integrated into new home automation platforms. For the latest list of compatible platforms, please refer to the website – www.zenthermost.com

At the time of printing, the ZEN thermostat has been tested to work with the following home automation platforms:

 SwannOne  OpenHome  Smartthings

ZEN supports only standard ZigBee clusters and should, in theory, work with any ZigBee HA compatible system.

However, in practice, some integration effort may be required by the HA platform to ensure reliable operation.

If you are attempting to connect ZEN to a home automation platform which is not in the list above, and there are issues in the connection process, please contact the home automation platform support line.

Joining and Leaving a ZigBee Network

Joining

Once you’ve set your home network to search for a new device, remove the display from the wall mount and press the NETWORK button 5 times (the thermostat will beep on each button press).

The wireless icon will start flashing when pairing with your home network.

Once connected it will stop flashing and remain illuminated.

If you have joined a network but it is not the correct network, press the NETWORK button 5 times again to search for the next available network

Leaving

To leave a ZigBee network, remove the display from the wall mount and press the NETWORK button 10 times (the thermostat will beep on each button press).

The wireless icon will disappear once you have left the network.

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Useful Links

ZEN Thermostat Website

ZEN Thermostat support email

ZEN Thermostat Online Installation Guide

ZEN Thermostat FAQ

www.zenthermostat.com

info@zenthermostat.com

www.zenthermostat.com/install

www.zenthermostat.com/faq

Zen THERMOSTAT Installation Manual

Specifications and Main Features

Frequently Asked Questions

User Manual