Tekmar Invita User manual

Installation Manual
Compatible With
• Conventional systems:
2-stage heating, 2-stage cooling, fan and 2 accessories
• Heat pump systems:
4-stage heating, 2-stage cooling, fan,reversing valve and 1 accessory
• Supports dual fuel systems
• Accessory options:
Humidifier, dehumidifier, HRV/ERV ventilator, heat pump loop valve
Wall Plate
Invita®
WiFi Thermostat
HVAC
Interface Module
IOM-T-564
Installation, Operation and Maintenance
Invita®WiFi Thermostat
WARNING
!
Please read carefully before proceeding with
installation. Your failure to follow any attached
instructions or operating parameters may lead to the
product’s failure.
Keep this Manual for future reference.

2
Important Safety Information ......................................................3
Installation .....................................................................4
Preparation ..................................................................4
Equipment Connections ..........................................................6
Wiring the HVAC Interface Module...................................................7
1-Stage Heat and 1-Stage Cooling with Fan .........................................7
Up to 2-Stage Furnace and 2-Stage Air Conditioner ...................................8
Up to 2-Stage Hydronic Boiler and 2-Stage Air Conditioner .............................8
Up to 2-Stage Heat Pump with Auxiliary Heat ........................................9
Up to 2-Stage Heat Pump with 2-Stage Dual Fuel ....................................9
Dehumidification using a DX Coil.................................................10
Humidifier ..................................................................10
HRV/ERV Ventilator...........................................................10
Outdoor Sensor .............................................................10
Room Sensor ...............................................................11
Watts FloodSafe Water Detector Shutoff ...........................................11
Startup ......................................................................11
Home Screen .................................................................12
Symbols .....................................................................12
User Settings..................................................................13
Away......................................................................13
Schedule ..................................................................13
Display ....................................................................14
Time ......................................................................15
Fan .......................................................................15
WiFi ......................................................................16
WiFi and Connectivity Troubleshooting ............................................17
Installer Settings ...............................................................18
Setup .....................................................................18
Setup - Toolbox .............................................................18
Setup - Temp ...............................................................19
Setup - Sensors .............................................................20
Setup - Alerts ...............................................................21
Setup - Relays ...........................................................22–24
Setup - Humidity.............................................................25
Setup - HRV / ERV Ventilation...................................................26
Sequence of Operation ..........................................................27
Heating and Cooling Operation ...............................................27-29
Relative Humidity Operation ....................................................30
HRV / ERV Ventilator Operation..................................................31
Heat Pump Loop Valve Operation ................................................31
Error Messages .............................................................32–33
Technical Data .................................................................35
Limited Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
Table of Contents Page

3
Important Safety Information
It is your responsibility to ensure that this thermostat is safely installed according to all applicable
codes and standards. tekmar®is not responsible for damages resulting from improper installation and/
or maintenance.
This is a safety-alert symbol.
The safety alert symbol is
shown alone or used with
a signal word (DANGER,
WARNING, or CAUTION),
a pictorial and/or a safety
message to identify hazards.
When you see this symbol
alone or with a signal word
on your equipment or in
this manual, be alert to the
potential for death or serious
personal injury.
This pictorial alerts you to
electricity, electrocution, and
shock hazards.
This symbol identifies hazards which, if not avoided,
could result in death or serious injury.
This symbol identifies hazards which, if not avoided,
could result in minor or moderate injury.
This symbol identifies practices, actions, or failure
to act which could result in property damage or
damage to the equipment.
• It is the installer’s responsibility to ensure
that this control is safely installed according
to all applicable codes and standards.
• Improper installation and operation of this
control could result in damage to the
equipment and possibly even personal
injury or death.
• This control is not intended for use as a
primary limit control. Other controls that are
intended and certified as safety limits must
be placed into the control circuit.
NOTICE
Read manual and all prod-
uct labels BEFORE using
the equipment. Do not use
unless you know the safe
and proper operation of this
equipment. Keep this man-
ual available for easy access
by all users. Replacement
manuals are available at
tekmarControls.com
Do not attempt to service the thermostat.
There are no user serviceable parts inside the
thermostat. Attempting to do so voids the
warranty.

4
Tools Required
Preparation
Materials Required
• 18 AWG LVT Solid Wire (low voltage connections)
1. Remove the old thermostat
If more than 2 wires are present, identify the R & C wires for use when connecting the Invita WiFi
Thermostat. Additional wires should be secured in a way that prevents them from touching the circuit
board or terminals on the Invita after the R & C wires are connected.
Installation
• tekmar or jeweler screwdriver
• Phillips head screwdriver
• Wire stripper
• Drill (for wall anchor)
• 3⁄16" drill bit (for wall anchor)
Ensure power to connecting equipment is off. To prevent the risk of personal
injury and/or death, make sure power is not applied to the thermostat or HVAC
Interface Module until they are fully installed and ready for configuration. All work
must be done with power to the circuit being worked on turned off.
NOTICE
Please be aware local codes may require this thermostat to be installed or connected by
an electrician.
NOTICE
Thermostat Location
Consider the following:
• Interior wall. Keep dry. Avoid potential leak-
age onto the control.
• No draft, direct sun, or other cause for inac-
curate temperature readings.
• Away from equipment, appliances, or other
sources of electrical interference.
• Approximately 5 feet (1.5 m) off the finished
floor.
• The maximum length of wire is 500 feet (150 m).

5
2. Mount Invita base to wall
Remove the back plate from the thermostat.
Secure the Invita thermostat back plate to a
2 x 4" electrical box with machine screws or to
drywall using wood screws with wall anchors.
If the wall has damage extending beyond the width
of the Invita WiFi Thermostat, place the wall plate
trim behind the back plate.
Connect the 2 wires from the old thermostat to the
terminals on the back of the Invita WiFi Thermostat.
This connection is not polarity sensitive.
3. Wiring the Invita WiFi Thermostat
Align the 2 notches at the top of the base plate
with the holes on the top of the thermostat then
rotate on the hinge point down to close.
4. Attach the thermostat
to back plate
Locate the HVAC Interface Module so that it can
connect to the other end of the existing wire from
the thermostat. After removing the cover, secure
the HVAC Interface Module to the wall, the HVAC
equipment chassis or HVAC plenum using the
holes at the top and bottom of the module.
Wiring to the module enters from opening on
the sides or the back. Refer to the diagrams on
pages 6 to 11 for wiring details.
5. Mounting the HVAC
Interface Module
6. Replace the Cover
Push the HVAC
Interface Module
Cover towards the
base. Top and bottom
clips hold the cover
in place.

6
Equipment Connections
This illustration shows various equipment connected to the HVAC Interface Module. Other equipment
may be included in your application.
Conventional systems:
• Up to 2-stage heating, 2-stage cooling, fan and 2 accessories
Heat pump & dual fuel systems:
• Up to 4-stage heating, 2-stage cooling, fan, reversing valve and 1 accessory
Accessory options:
• Humidifier, dehumidifier, HRV/ERV ventilator
W
Air Conditioner
or
Heat Pump
HVAC
Interface
Module
Hot Water Tank
Watts
FloodSafe®
Water Detector
Shutoff
HRV/ERV
Ventilator
Optional
Outdoor
Sensor
Invita WiFi
Thermostat
Furnace
Humidifier
Electric Coil

7
Wiring the HVAC Interface Module
The HVAC Interface Module includes
three relay power jumper connectors.
These are used to provide power
between terminals when necessary.
• Set Jumper J1 to On to connect
power R to the Rc terminal.
• Set Jumper J2 to On to connect
power R to the Rh2 wiring terminal.
• Set Jumper J3 to On connects power
R to the Rh1 wiring terminal.
• Set the jumper to off to disconnect
the power from Rh1, Rh2, or Rc
respectively.
1-Stage Heat and 1-Stage Cooling with Fan
Essential Settings:
Heating Type = Conventional
Equipment = 1 Heat/1 Cool
Radiant Floor Heating = No
Jumpers:
J1 = On
J2 = Off
J3 = On
Ensure power to connecting equipment is off. To prevent the risk of personal
injury and/or death, make sure power is not applied to the thermostat or HVAC
Interface Module until they are fully installed and ready for configuration. All work
must be done with power to the circuit being worked on turned off.

8
Up to 2-Stage Hydronic Boiler and 2-Stage Air Conditioner
Essential Settings:
Heating Type = Conventional
Equipment = 2 Heat/2 Cool
Radiant Floor Heating = Yes
Up to 2-Stage Furnace and 2-Stage Air Conditioner
Furnace
Air
Conditioner
Essential Settings:
Heating Type = Conventional
Equipment = 2 Heat/2 Cool
Radiant Floor Heating = No
Jumpers:
J1 = On
J2 = On
J3 = On
Jumpers:
J1 = On
J2 = On
J3 = Off

9
The thermostat operates high cost electric resistance heat when the heat pump is unable to meet the
building heating load.
Up to 2-Stage Heat Pump with Auxiliary Heat
Air
Handling
Unit
The thermostat operates the heat pump when the outdoor air temperature is above the balance point
setting and switches to the furnace when below.
Up to 2-Stage Heat Pump with 2-Stage Dual Fuel
Air
Handling
Unit
Essential Settings:
Heating Type = Heat Pump
Equipment = 2 Heat Pump/1 Aux
Radiant Floor Heating = No
Essential Settings:
Heating Type = Heat Pump
Equipment = 2 Heat Pump/2 Aux
Radiant Floor Heating = No
Jumpers:
J1 = On
J2 = On
J3 = On
Jumpers:
J1 = On
J2 = On
J3 = On

10
Essential Settings:
Accessory Relay 1 or 2 = Dehumidifier
Dehumidifier Type = DX Coil
The thermostat operates the cooling system and runs the system fan at low speed to dehumidify
the air.
Dehumidification using a DX Coil
Air
Handling
Unit
HRV / ERV
Ventilator
The Heat Recovery Ventilator (HRV) or Energy Recovery Ventilator (ERV) operates to improve
indoor air quality and recovers heat from exhaust air.
Essential Settings:
Accessory Relay 1 = Ventilation
HRV/ERV Ventilator
Humidifier
The thermostat operates a humidifier to increase relative humidity.
Humidifier
Essential Settings:
Accessory Relay 1 or 2 = Humidifier
• Installing an outdoor sensor provides more accurate
outdoor temperature readings compared to using
the weather information from the Internet which may
cause delays in updating weather.
• Outdoor temperature is displayed on home screen.
• Used to enable heat pump dual fuel switchover, warm
weather shut down, and cold weather shut down.
Outdoor Sensor
tekmar Outdoor
Sensor 070
External Jumper
Wires:
R to Acc1