tekmar 552 Installation

552_D

tekmarNet® Thermostat 552

Installation & Operation Manual

Introduction

The tekmarNet® Thermostat 552
provides operation for:

One Stage Heat•

Zoning

Replaces: 08/11

Features

Touchscreen

•
Bright Backlight

•
tekmarNet

•
Outdoor Temperature Display

•
Floor Temperature Display

•
7-Day, 4 Event Programmable

•
Schedule

Optimum Start

•
Scenes

•
Away Key

•
Air Group Member

•
Freeze Protection

•
Exercise Pump or Valves

•
Zone Synchronization

•
Two Auxiliary Sensor Inputs

•

®

Communication

09/14

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Benefi ts

•

•

•

•

•

•

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Simple to Use
Increased Comfort Through

Precise Temperature Control
Conserves Energy
Convenience Through Internet

Connectivity
Warm Radiant Floors
Protects Radiant Floors From

Over Heating

© 2014

552_D - 09/14

Table of Contents

Getting Started ...................................................................................................4

Installation ..............................................................................................................4

Preparation .........................................................................................................4

Removing The Thermostat Base .......................................................................5

Mounting The Thermostat Base ......................................................................... 5

Thermostat Wiring .............................................................................................. 6

Compatible Sensors ........................................................................................... 7

Testing the Thermostat Wiring ...........................................................................8

Mounting the Thermostat ................................................................................. 10

Cleaning the Thermostat .................................................................................. 10

Switch Settings ......................................................................................................11

User Interface ....................................................................................................... 12

Home Screen ................................................................................................... 12

Symbols Description ........................................................................................12

Programmable Settings ........................................................................................ 13

Programming Menus ........................................................................................ 13

Set Temp Menu ................................................................................................ 14

Time Menu ....................................................................................................... 17

Schedule Menu ................................................................................................ 19

Display Menu ...................................................................................................20

Scenes Menu ................................................................................................... 21

Monitor Menu ................................................................................................... 22

Toolbox Menu ................................................................................................... 24

Setup Menu ...................................................................................................... 27

Sequence of Operation ......................................................................................... 29

Heating Operation ............................................................................................29

Air Group Operation ......................................................................................... 31

Time Clock ....................................................................................................... 31

Temperature Adjustment ..................................................................................32

Programmable Schedules ................................................................................ 33

Scenes (System Override) ...............................................................................34

Secondary Temperature Display ............................................................................... 35

Access Levels .................................................................................................. 36

tekmarNet

Screen Clean Menu .........................................................................................36

Troubleshooting .................................................................................................... 33

Error Messages ................................................................................................ 37

Frequently Asked Questions ............................................................................42

Technical Data .................................................................................................43

Limited Warranty and Product Return Procedure ............................................44

®

Address .........................................................................................36

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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.

Read Manual and all product labels BEFORE using the
equipment. Do not use unless you know the safe and
proper operation of this equipment. Keep this Manual
available for easy access by all users. Replacement
Manuals are available at tekmarControls.com

•

It is the installers responsibility to ensure that this thermostat is safely installed
according to all applicable codes and standards.

•

Improper installation and operation of this thermostat could result in damage to the
equipment and possibly even personal injury or death.

This thermostat 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.

Do not attempt to service the thermostat. There are no user serviceable parts inside
the thermostat. Attempting to do so voids warranty.

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Getting Started

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Congratulations on the purchase of your new tekmar thermostat.
This manual will step through the complete installation, programming and sequence

of operation for this control. At the back, there are tips for control and system
troubleshooting.

Installation

Preparation

Tools Required

tekmar or jeweller screwdriver

•
Phillips head screwdriver

•

Materials Required

18 AWG LVT Solid Wire

•
(Low Voltage Connections)

Installation Location

Choose the placement of the thermostats early in the construction process to
enable proper wiring during rough-in.

Consider the following:

Interior Wall.

•
Keep dry. Avoid potential leakage onto the control.

•
Relative Humidity less than 90%. Non-condensing environment.

•
No exposure to extreme temperatures beyond 32-122°F (0-50°C).

•
No draft, direct sun, or other cause for inaccurate temperature readings.

•
Away from equipment, appliances, or other sources of electrical

•
interference.

Easy access for wiring, viewing, and adjusting the display screen.

•
Approximately 5 feet (1.5 m) off the finished floor.

•
The maximum length of wire is 500 feet (150 m).

•
Strip wire to 3/8" (10 mm) for all terminal connections.

•
Use standard 8 conductor, 18 AWG wire.

•

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Wire Stripper•

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To prevent the risk of personal injury and/or death, make sure power
is not applied to the thermostat until it is fully installed and ready for
final testing. All work must be done with power turned off to the circuit
being worked on.

Please be aware local codes may require this thermostat to be installed
or connected by an electrician.

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Removing The Thermostat Base

To remove the thermostat base:

Locate the tab on the bottom of the

•
thermostat.

Push the tab with either your thumb or

•
with a screwdriver.

Lift the thermostat front away from the

•
thermostat’s base.

Mounting The Thermostat Base

If a single gang box is used:

Feed the wiring through the large

•
hole of the thermostat base.

Fasten the base of the thermostat

•
to the gang box.

Terminate wiring to the wiring

•
strip.

Push the thermostat front onto

•
the thermostat base.

Thermostat

Front

Thermostat

Base

3 1/4”

(83 mm)

Stud

Gang
Box

If a gang box is not used:

Feed the wiring through the large

•
hole in the thermostat base.

Mount the thermostat base

•
directly to the wall.

Use screws in the screw holes

•
to fasten the thermostat to the
wall. At least one of the screws
should enter a wall stud or
similar rigid material.

Terminate wiring to the wiring

•
strip.

Push the thermostat front onto

•
the thermostat base.

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Thermostat

Front

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Thermostat

Base

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Stud

Wall

Thermostat Wiring

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The thermostat operates a single heating system zone and can be wired in four
different ways.

tekmarNet®2 - Allows the thermostat to be wired point-to-point using 2 wires to a
tekmarNet®2 Wiring Center, House Control, or Zone Manager. This allows easy
wiring for retrofit applications.

tekmarNet®4 - Allows the thermostat to be wired using 4 wires to a tekmarNet Wiring
Center or Zone Manager point-to-point. Alternatively, the thermostat can operate
heating equipment locally and the tN4 communication bus can be daisy-chained
from one thermostat to another.

Stand Alone
Stand Alone - Simple 3 wire connection to a switching relay or zone valve control.

- Simple 3 wire connection to a 24 V (ac) transformer and zone valve.

Wiring - tekmarNet®2

tN2 Wiring Center
tN2 House Control
tN2 Zone Manager

Wiring - tekmarNet®4

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Optional Sensor 1

C

tN4

R

tN2

tN2

tN2 tN2

-------------------------------------------------

Rh W1

No Power

S1 S2

Com

Optional Sensor 2

Install field jumper
wire R to Rh

Optional Sensor 1

tN4 C W

R

tN4 Wiring Center
tN4 Zone Manager

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C

tN4

tN2

tN2

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R

Rh W 1

No Power

S1 S2

Com

Optional Sensor 2

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Wiring - Stand Alone to Transformer and Zone Valve

-------------------

---------

-------------------

Zone Valve

R

C

Install field jumper
wire R to Rh

C

tN4

R

tN2

tN2

Rh W1

No Power

S1 S2

Optional Sensor 1

Optional Sensor 2

Com

24 V (ac)

transformer

L

N

Wiring - Stand Alone to Switching Relay or Zone Valve Control

Optional Sensor 1

W

R

R

W

R

(T)(T)

(T)(T)

(T)(T)

C

tN4

R

tN2

tN2

Rh W1

No Power

S1 S2

Com

Optional Sensor 2

24 V
Com

Switching Relay

W

Zone 1 Zone 2 Zone 3

HNXX HNHN NL

---------

Zone Pump

N
L

Compatible Sensors

The thermostat is compatible with Indoor Sensor type 076, 077, 084, Floor Sensor type
072, 073, 079, and Outdoor Sensor type 070.

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Only qualified personnel should perform testing procedures. A licensed electrician
is recommended.

Testing the Thermostat Wiring

Testing tekmarNet®2 Wiring

------------------------------------------

Testing the Power

If the thermostat display turns on, this indicates that the thermostat is operating
correctly and there are no electrical issues. In the event that the display is off, or the
display is cycling on and off:

1. Remove the thermostat front.

2. Use an electrical meter to measure DC voltage between the tN2 terminals.

•

If the DC voltage is 0 V (dc) for at least 20 seconds, then there is an open or short
circuit in the tN2 wires.

•

If the DC voltage is 0 V (dc) for 10 seconds and then is 23 to 24 V (dc) for 5 seconds,
this indicates the wiring is correct.

3. Connect the thermostat to the tN2 wires connected to a zone on a House Control,
Wiring Center, or Zone Manager.

4. If the thermostat display is off, or is cycling on and off, move the thermostat to the
next available zone on the House Control, Wiring Center, or Zone Manager.

•

If the thermostat display remains permanently on, there may be a fault with the
previously tried zone on the House Control, Wiring Center, or Zone Manager.

•

If the thermostat display continues to be off, or is cycling on and off, there may be
a fault on the thermostat.

If a fault is suspected, contact your tekmar sales representative for assistance.

Testing the Heat Zone Output Wiring

1. Touch the button and set the heating temperature above the current room
temperature. Make sure the display does not show “WWSD” or “Floor Max”.

2. When the “Heat On” symbol appears on the display, use an electrical meter to
check for voltage on the House Control, Wiring Center, or Zone Manager relay.
The voltage is 24 V (ac) for zone valves, and 120 V (ac) for zone pumps when
operating correctly.

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Testing tekmarNet

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®

4 and Stand Alone Wiring

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Testing the Power

1. Remove the front cover from the thermostat.

2. Use an electrical test meter to measure (ac) voltage between the R and C terminals.
The reading should be 24 V (ac) +/– 10%.

3. Install the front cover.

Testing the Heat Relay

1. Remove the front cover from the thermostat.

2. Touch the button and set the heating temperature below the current room
temperature. There should be no “Heat On” symbol on the display.

3. Set the electrical test meter to continuity.

4. Place electrical meter probes between R and W. There should be no continuity. If
there is continuity then there may be a wiring fault or the relay may be faulty.

5. Touch the button and set the heating temperature above the current room
temperature. Make sure the display does not show “WWSD”. The “Heat On” symbol
should appear on the display.

6. There should now be continuity between the R and W terminals.

®

Testing the tekmarNet

4 Bus Wiring

The symbol is shown on the display when communication is present. If the
thermostat is connected in a network and the communication is missing, there may
be an open or short circuit on the tN4 and C bus wires.

1. Remove the front cover from the thermostat.

2. To test for short circuits:

•

Disconnect the tN4 bus wires on one end.

•

Install wire nuts on each wire to ensure the wire ends are not touching.

•

Disconnect the tN4 bus wires on the other end.

•

Measure for continuity using an electrical meter.

•

If continuity is present, there is a short circuit fault along the wires. It is recommended
to replace the tN4 bus wires.

3. To test for open circuits:

•

Disconnect the tN4 bus wires on one end and connect them together.

•

Disconnect the tN4 bus wires on the other end.

•

Use an electrical meter to measure for continuity.

•

If there is no continuity, there is an open circuit fault along the wires. It is recommended
to replace the tN4 bus wires.

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Mounting the Thermostat

Thermostat

Base

Thermostat

Front

Push the thermostat front onto
the thermostat base. Installation
is now complete.

Push

Cleaning the Thermostat

The thermostats’s exterior can be cleaned using a damp cloth. Moisten the cloth
with water and wring out prior to wiping the control. Do not use solvents or cleaning
solutions.

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Switch Settings

Switch

1

Position

ON

OFF

Back of

Thermostat

1051-03

1051-03

Mmm YYYY

Use at least 75°C conductors

Lot # 12345

For instructions see brochure

Switch

Settings

ON

123

Lock

tekmarNet

tNt 552

ON

None

Scene

Setback

One Stage Heat

Thermostat 552

One Stage Heat

2

1

Switch Settings:

Off

Unlock

Unlock

Unused

/

www.tekmarcontrols.com

Power: 24 V ±10% 50/60 Hz 1.7 VA

Power: tN2 or 24 V (ac) ±10% 1.8 VA

Cool Master 1

Relay: 24 V (ac) 2 A

Relay: 24 V (ac) 2 A
Designed and assembled in Canada

Designed and

Meets Class B: ICES & FCC Part 15

assembled in Canada

Mmm YYYY

/

Lot # 12345

Meets Class B:
Canadian ICES
FCC Part 15

Action

LOCK ACCESS LEVEL

Thermostat is locally locked and the access level cannot be changed.
Set to Lock when installation has been completed.

UNLOCK ACCESS LEVEL

Thermostat is unlocked and the access level may be changed. Go to
the Toolbox menu to change the access level. Set to Unlock during
the installation process.

Note: tekmarNet® system controls include a Global Lock that locks all
connected thermostats. Set the tekmarNet® system control to unlock
to allow access level adjustment on all connected thermostats.

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User Interface

Home Screen

The touchscreen of the 552 provides one touch access to these settings.

Adjust

the Time.

Adjust the
Schedule.

Display the
Floor or Outdoor
temperature.

Room
Temperature.

Away Key.

Turn the

Heat on

or Off.

Symbols Description

HEAT ON

Heat is turned on.

SUN

Operating at the occupied (day)
temperature.

MOON

Operating at the unoccupied
(night) temperature.

tekmarNet

Communication is present.

WARNING SYMBOL

Indicates an error is present.

®

Home

Button

Adjust the Temperature.

Home Button.
Return to the ‘Home’
Screen from any menu.
Press and hold for 3
seconds to access the
programming menus.

SCENE AWAY

Operating at Away temperature.

TEMPORARY HOLD

Hold for 3, 6, 9 or 12 hours.

WWSD

Warm Weather Shut Down.

COOL

Cooling system is on.

MIN or MAX

Reached the room min or max.

ARROWS

Adjust the displayed setting.

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MIN FL or MAX FL

Reached the floor min or max.

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Programmable Settings

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Programming Menus

Press and hold the Home button for 3 seconds to enter the programming menus.
The thermostat returns to the last programming menu previously used.

Press and
hold for 3
seconds to
access the
programming
menus.

Select a Programming Menu

Touch “NEXT” to advance (clockwise in above illustration) to the next menu.

•

Touch “BACK” to go backwards (counterclockwise in above illustration) through

•

-----------------------------------------

the menus.
Touch “ENTER” to enter a menu.

•

Setting Items

Touch or arrow to adjust the setting if required.

•

Touch “NEXT ITEM” to advance to the next item within the menu.

•

Touch “BACK ITEM” to go backwards to the previous item within the menu.

•

To return to the parent menu after changing a setting, press and release the

•

--------------------------------------------------------

home button.
To return to the home screen, press and release the home button twice or wait

•

30 seconds to automatically return to the home screen.

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Set Temp Menu (1 of 3)

Setting Display

SET HEAT ROOM

Set the room heating temperature during the
event.

Access Level: Installer, User Range: 40 to 95°F (4.5 to 35.0°C)
Conditions: Room Sensor set to ON or Sensor 1 or

Sensor 2 set to Room.

Default: 70°F (21.0°C)

SET HEAT ROOM

Set the room heating temperature during the
event.

Access Level: Installer, User Range: 40 to 95°F (4.5 to 35.0°C)
Conditions: Room Sensor set to ON or Sensor 1 or

Sensor 2 set to Room, and Schedules are in use
or Scenes are set to All or Guest.

Default: 65°F (18.5°C)

SET HEAT ROOM AWAY

Set the room heating temperature during the Away
scene.

Access Level: Installer, User Range: 40 to 95°F (4.5 to 35.0°C)
Conditions: Room Sensor set to ON or Sensor 1 or

Sensor 2 set to Room, and Scenes is set to Away,
All or Guest.

Default: 62°F (16.5°C)

ROOM MAX

Set the maximum room heating limit while in the

event.
Access Level: Installer Range: 40 to 95°F (4.5 to 35.0°C)
Conditions: Room Sensor set to ON or Sensor 1 or

Sensor 2 set to Room.

Default: 85°F (29.5°C)

ROOM MAX

Set the maximum room heating limit while in the
event.

Access Level: Installer Range: 40 to 95°F (4.5 to 35.0°C)
Conditions: Room Sensor set to ON or Sensor 1 or

Sensor 2 set to Room, and Schedules are in use
or Scenes are set to All or Guest.

Default: 85°F (29.5°C)

SET HEAT FLOOR

Set the floor heating temperature while in the
event.

Access Level: Installer, User Range: 40 to 122°F (4.5 to 50.0°C)
Conditions: Room Sensor set to OFF and Sensor

1 or Sensor 2 set to Floor.

Default: 72°F (22.0°C)

Room

Room

Room

Floor

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Set Temp Menu (2 of 3)

Setting Display

SET HEAT FLOOR

Set the floor heating temperature while in the
event.

Access Level: Installer, User Range: 40 to 122°F (4.5 to 50.0°C)
Conditions: Room Sensor set to OFF and Sensor

1 or Sensor 2 set to Floor, and Schedules are in

Default: 65°F (18.5°C)

use or Scenes are set to All or Guest.

WARM WEATHER SHUT DOWN

Set the outdoor air temperature at which heating is
suspended during the event.

Access Level: Installer

Range: CTRL (control), 40 to
100°F (4.5 to 38.0°C), OFF

Conditions: Always available Default: CTRL

WARM WEATHER SHUT DOWN

Set the outdoor air temperature at which heating is
suspended during the event.

Access Level: Installer

Conditions: Requires that Schedules are in use or
Scenes is set to All or Guest.

Range: CTRL (control), 40 to
100°F (4.5 to 38.0°C), OFF

Default: CTRL

FLOOR MINIMUM

Set the floor heating temperature while in the
event.

Access Level: Installer, User

Range: OFF, 40 to 122°F (4.5 to

50.0°C)

Conditions: Sensor 1 or Sensor 2 set to Floor, and
either Room Sensor set to ON, or Room Sensor

Default: 72°F (22.0°C)

set to OFF while Sensor 1 or 2 is set to Room.

FLOOR MINIMUM

Set the floor heating temperature while in the
event.

Access Level: Installer, User

Range: OFF, 40 to 122°F (4.5 to

50.0°C)

Conditions: Sensor 1 or Sensor 2 set to Floor, and
either Room Sensor set to ON, or Room Sensor
set to OFF while Sensor 1 or 2 is set to Room,

Default: OFF
Schedules are in use or Scenes are set to All or
Guest.

Floor

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Set Temp Menu (3 of 3)

Setting Display

FLOOR MAXIMUM

Set the floor maximum temperature in order to
protect the floor covering.

Suggested settings:
Tile = 90°F (32°C)
Hardwood Floor = 85°F (29°C)

Access Level: Installer

Conditions: Sensor 1 or Sensor 2 set to Floor, and
either Room Sensor set to ON, or Room Sensor
set to OFF while Sensor 1 or 2 is set to Room, and
Schedules or Scenes are in use.

TEMPORARY HOLD

Temperature adjustment in the home menu can
result in either permanent temperature setting
change or temporary temperature setting change
that lasts 3, 6, 9, 12 hours or until the next sched­uled event.

Access Level: Installer Range: OFF or ON
Conditions: None Default: OFF

Range: 40 to 122°F (4.5 to

50.0°C), OFF

Default: 85°F (29.5°C)

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Time Menu (1 of 2)

Setting Display

MINUTE

Select the current time minutes.

Access Level: Installer, User Range: 00 to 59
Conditions: Schedule is used or Clock is set to ON. Default: 00

HOURS

Select the current time hours.

Access Level: Installer, User Range: 12 AM to 11 PM or 00 to 23
Conditions: Schedule is used or Clock is set to ON. Default: 12 AM

DAY OF WEEK

Select the current day of the week.

Range: Sunday, Monday, Tuesday,
Access Level: Installer, User

Conditions: Schedule is used or Clock is set to ON. Default: Sunday

MONTH

Select the current month.

Wednesday, Thursday, Friday,

Saturday

Access Level: Installer, User Range: JANUARY to DECEMBER
Conditions: Schedule is used or Clock is set to ON. Default: JANUARY

DAY OF MONTH

Select the day of the current month.

Access Level: Installer, User Range: 1 to 31
Conditions: Schedule is used or Clock is set to

ON.

Default: 1

YEAR

Select the current year.

Access Level: Installer, User Range: 2014 to 2255
Conditions: Schedule is used or Clock is set to ON. Default: 2014

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Time Menu (2 of 2)

Setting Display

DAYLIGHT SAVINGS TIME

Select if daylight savings time is observed.

Access Level: Installer, User Range: OFF or ON
Conditions: Clock setting is set to ON. Default: ON

TIME MODE

Select either 12 or 24 hour time format.

Access Level: Installer, User Range: 12 or 24 hour
Conditions: Clock setting is set to ON. Default: 12 hour

CLOCK

Select whether or not to show the time clock on
the display.

Access Level: Installer, User Range: OFF or ON
Conditions: The time is always shown when a

schedule is used and the clock setting option is no
longer available.

Default: OFF

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Schedule Menu (1 of 2)

The schedule menu can operate on a 24 hour or 7 day repeating schedule. When a
24 hour schedule is selected, “SuMoTuWeThFrSa” is shown on the top of the screen
to show that the event time applies to all days of the week. When a 7 day schedule
is selected, each individual day of the week is shown with the event time.

Setting Display

EVENT 1

The first programmable schedule time period of
the day. The

temperature settings are used

during this time period.

Access Level: Installer, User

Conditions: Schedule setting is set to Zone or
Master 1, 2, 3, 4 and Event/Day is set to 2 or 4.

EVENT 2

The second programmable schedule time period
of the day. The temperature settings are used
during this time period.

Access Level: Installer, User

Conditions: Schedule setting is set to Zone or
Master 1, 2, 3, 4 and Event/Day is set to 2 or 4.

EVENT 3

The third programmable schedule time period
of the day. The temperature settings are used
during this time period.

Access Level: Installer, User

Conditions: Schedule setting is set to Zone or
Master 1, 2, 3, 4 and Event/Day is set to 4.

EVENT 4

The fourth programmable schedule time period
of the day. The temperature settings are used
during this time period.

Access Level: Installer, User

Conditions: Schedule setting is set to Zone or
Master 1, 2, 3, 4 and Event/Day is set to 4.

SuMoTuWeThFrSa

Range: 12:00 AM to 11:50 PM, SKIP

or 00:00 to 23:50, SKIP

Default: 6:00 AM

SuMoTuWeThFrSa

Range: 12:00 AM to 11:50 PM, SKIP

or 00:00 to 23:50, SKIP

Default:

10:00 PM when Event/Day is 2

8:00 AM when Event/Day is 4

SuMoTuWeThFrSa

Range: 12:00 AM to 11:50 PM, SKIP

or 00:00 to 23:50, SKIP

Default: 6:00 PM

SuMoTuWeThFrSa

Range: 12:00 AM to 11:50 PM, SKIP

or 00:00 to 23:50, SKIP

Default: 10:00 PM

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Schedule Menu (2 of 2)

Setting Display

SCHEDULE

Select if the thermostat should change the temperature
automatically using a programmable schedule.

OFF = Programmable schedule is not used.
Zone = Applies to this thermostat only.
Master 1, 2, 3, 4 = In charge of one of four available

network schedules.
Member 1, 2, 3, 4 = Follows selected network

schedule.

Access Level: Installer, User

Conditions: In a tekmarNet® system, settings adjustable
in Installer access level only.

EVENT PER DAY

Select the number of temperatures per day.

Access Level: Installer, User Range: 2 or 4
Conditions: Schedule setting is set to Zone or

Master 1, 2, 3, 4.

24 HOUR / 7 DAY

Range: OFF, Zone, Master 1, 2, 3,
4, Member 1, 2, 3, 4

Default: OFF

Default: 2

Access Level: Installer, User Range: 24 hour or 7 day
Conditions: Schedule setting is set to Zone or Master

1, 2, 3, 4.

Default: 24 hour

OPTIMUM START

Select whether or not to use optimum start. The
thermostat learns the heat up rate of the radiant
floor heating system and starts heating in advance
of Event 1 or Event 3.

Access Level: Installer, User Range: OFF or ON
Conditions: A schedule must be in use. Default: ON

Display Menu (1 of 2)

Setting Display

UNITS

Select Fahrenheit or Celsius as the temperature
units.

Access Level: Installer, User Range: °F or °C
Conditions: Always available. Default: °F

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Display Menu (2 of 2)

Setting Display

BACKLIGHT

Select how the display backlight operates.
ON = Always full brightness.
DIM = Dim when inactive, on when touched.

= Dim in , off in . On when touched.

DIM

= On in , off in . On when touched.

ON
OFF = Always off.

Access Level: Installer, User
Conditions: Always available.

Range: DIM, ON, DIM , ON , OFF

Default: DIM

SECONDARY ITEM

Determine the default item in the upper right hand
corner of the display.

Access Level: Installer, User

Range: NONE, OUT (outdoor),

FLOR (floor)
Conditions: Always available. Default: OUT (outdoor)

Scenes Menu (1 of 1)

Setting Display

SCENES

Enable or disable the use of scenes (building overrides)
on this thermostat.

Access Level: Installer, User
Conditions: Settings ALL and GUEST only available

in Installer access level.

SCENE 4

Select how the thermostat should respond to scene 4.
Access Level: Installer

Conditions: Requires that Schedule is set to Zone, Master
or Member 1, 2, 3, 4 and Scenes is set to All.

AWAY KEY

Enable or disable the away touch key on the home
screen.

Access Level: Installer, User Range: OFF or ON
Conditions: Scene is set to ALL, AWAY, or GUEST. Default: OFF

LOCAL NETWORK GROUP

Select if scenes and time clock are shared when
connected to a tekmarNet

®

system.
OFF = Send and receive messages.
ON = Receive messages only.

Access Level: Installer Range: OFF or ON
Conditions: Always available. Default: OFF

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Range: NONE, AWAY, ALL, GUEST

Default: NONE

Range: SCHD,

, , Away

Default: SCHD (Schedule)

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Monitor Menu (1 of 3)

Setting Display

ROOM AVERAGE

Current room temperature. Displays the average if
there are multiple room sensors.

Access Level: Installer

Conditions: Sensor 1 or 2 is set to Room. Default: Not applicable.

FLOOR AVERAGE

Current floor temperature. Displays the average if
there are multiple floor sensors.

Access Level: Installer

Conditions: Sensor 1 or 2 is set to Floor. Default: Not applicable.

W1 SUPPLY

First stage heating supply water temperature.

Range: -58 to 212°F (-50.0 to

100.0°C)

Range: -58 to 212°F (-50.0 to

100.0°C)

Access Level: Installer

Conditions: Setup menu setting W1 TERM set to
CTRL, HRF1, HRF2, CONV or COIL.

ROOM LOCAL

The built-in room sensor temperature measurement.

Access Level: Installer

Conditions: Setup menu setting ROOM SENSOR
is set to ON.

SENSOR 1

The temperature measurement from the sensor 1
input wiring terminals.

Access Level: Installer

Conditions: Setup menu setting SENSOR 1 is set to
ROOM, FLOR, or OUT.

SENSOR 2

The temperature measurement from the sensor 2
input wiring terminals.

Access Level: Installer

Conditions: Setup menu setting SENSOR 2 is set
to ROOM or FLOR.

Range: -22 to 266°F (-30.0 to

130.0°C)

Default: Not applicable.

Range: -58 to 212°F (-50.0 to

100.0°C)

Default: Not applicable.

Range: -22 to 266°F (-30.0 to

130.0°C)

Default: Not applicable.

Range: -22 to 266°F (-30.0 to

130.0°C)

Default: Not applicable.

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Monitor Menu (2 of 3)

Setting Display

OUTDOOR HIGH

The highest recorded outdoor air temperature
measurement. Touch the number and touch the
ENTER key to reset.

Access Level: Installer, User

Conditions: Setup menu setting SENSOR 1 is set to
Outdoor or an outdoor temperature is available on

the tekmarNet® System.

OUTDOOR LOW

The lowest recorded outdoor air temperature
measurement. Touch the number and touch the
ENTER key to reset.

Access Level: Installer, User

Conditions: Setup menu setting SENSOR 1 is set to
Outdoor or an outdoor temperature is available on
the tekmarNet® System.

ROOM HIGH

The highest recorded room temperature measurement.
Touch the number and touch the ENTER key to
reset.

Access Level: Installer, User

Conditions: Setup setting ROOM SENSOR is set to
ON or SENSOR 1 or 2 is set to ROOM.

ROOM LOW

The lowest recorded room temperature measurement.
Touch the number and touch the ENTER key to
reset.

Access Level: Installer, User

Conditions: Setup setting ROOM SENSOR is set to
ON or SENSOR 1 or 2 is set to ROOM.

FLOOR HIGH

The highest recorded floor temperature measurement.
Touch the number and touch the ENTER key to
reset.

Access Level: Installer, User

Conditions: Setup menu setting SENSOR 1 or 2 is
set to FLOR.

Range: -76 to 149°F (-60.0 to

65.0°C)

Default: Not applicable.

Range: -76 to 149°F (-60.0 to

65.0°C)

Default: Not applicable.

Range: -76 to 149°F (-60.0 to

65.0°C)

Default: Not applicable.

Range: -76 to 149°F (-60.0 to

65.0°C)

Default: Not applicable.

Range: -76 to 149°F (-60.0 to

65.0°C)

Range: Not applicable.

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Monitor Menu (3 of 3)

Setting Display

FLOOR LOW

The lowest recorded floor temperature measurement.
Touch the number and touch the ENTER key to
reset.

Access Level: Installer, User

Conditions: Setup menu setting SENSOR 1 or 2 is
set to FLOR.

Range: -76 to 149°F (-60.0 to

65.0°C)

Default: Not applicable.

HEAT W1

The total number of hours the W1 relay has been
operated for heating. Touch the number and touch
the ENTER key to reset.

Access Level: Installer, User Range: 0000 to 9999 hours
Conditions: Always available. Default: 0000 hours

Toolbox Menu (1 of 3)

Setting Display

ACCESS LEVEL

Selects the access level of the thermostat, which
determines which menus and items are available.

Access Level: Installer, User, Limited, Secure

Conditions: Adjustable only when thermostat switch
setting set to UNLOCK OR tekmarNet® system control

switch setting set to UNLOCK.

Range: INST (installer), USER,
LTD (limited), SEC (secure)

Default: INST

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Toolbox Menu (2 of 3)

Setting Display

STATUS INFO

Displays the current status of the thermostat including
any overrides from the tekmarNet® system control.

Toggles between “Status Info” and the current
status.

Override W1 = The tekmarNet® system control is
either forcing the W1 relay on or off.

WWSD = Warm Weather Shut Down is in effect.

Air Group Master Cool = Heating is off while the
cooling system is on.

Optimum Start = Heating is started early in order
to meet temperature setpoint at Event 1 or
Event 3.

Floor Max = The floor has reached its maximum
temperature. Some under heating could occur.

Floor Min = The floor is operating at its minimum
temperature. Some over heating could occur.

Baseload On = Baseload heating is on even
though the room temperature is satisfied. Reduces
heat up time when the sun sets in the evening.

System Normal = Thermostat is operating
normally.

Access Level: Installer, User Range: See Description
Conditions: Always available. Default: System Normal

ADDRESS

The tekmarNet® address of this thermostat.
AUTO = Automatic addressing
To manually set the address, use the up or down

arrow buttons while in the Installer access level.

Range: AUTO, 01 to 24, b:01 to

Access Level: Installer

b:04, 1:01 to 1:24, 2:01 to 2:24, 3:01
to 3:24

Conditions: tekmarNet®2 or tekmarNet®4
communication detected.

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Default: AUTO

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Toolbox Menu (3 of 3)

Setting Display

SOFTWARE AND TYPE VERSION

Displays the software version and the tekmar type
number.

Access Level: Installer, User, Limited, Secure Range: 552
Conditions: Always available. Default: 552

DEVICE COUNT

Provides a count of all the tekmarNet® thermostats
and setpoint controls on the tekmarNet

Access Level: Installer Range: 1 to 24
Conditions: Must be connected to a tekmarNet®

system.

USER TEST

Select to begin the test routine by touching the up
arrow.

Step 1: The W1 relay will turn on.
Touch Cancel to stop test routine.
Touch Hold to pause test routine at current step for

5 minutes.
Access Level: Installer Range: OFF or ON
Conditions: Always available. Default: OFF

OFFSET ROOM

Manual offset correction of the room temperature
measurement.

Access Level: Installer Range: -5 to +5°F (-3.0 to +3.0°C)
Conditions: Always available. Default: 0°F (0.0°C)

®

system.

Default: 1

LOAD FACTORY DEFAULTS

Touch Enter to load the factory defaults settings.

Access Level: Installer Range: None
Conditions: Always available. Default: Keep existing settings

ERROR HISTORY 1 THROUGH 5

Displays a history of the last 5 errors that have occurred
on the thermostat in the past 30 days. Touch Enter
to manually clear the error code.

Access Level: Installer

Conditions: An error must have occurred in order to
view in the error history.

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Range: See Troubleshooting
section

Default: Not applicable

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Setup Menu (1 of 2)

Setting Display

SENSOR 1

Select to the type of sensor connected to auxiliary
sensor input 1.

Access Level: Installer

Conditions: Always available. Default: OFF

SENSOR 2

Select to the type of sensor connected to auxiliary
sensor input 2.

Access Level: Installer Range: OFF, ROOM, FLOR (floor)
Conditions: Always available. Default: OFF

ROOM SENSOR

Select whether the built-in room temperature sensor
is on or off.

Access Level: Installer Range: OFF or ON
Conditions: Only available when Sensor 1 or Sensor

2 is set to Room or Floor.

W1 TERMINAL UNIT

Select the terminal unit type of the first stage of
heat W1.

CTRL = Same as on tekmarNet

®

system control.
HRF1 = High mass hydronic radiant floor
HRF2 = Low mass hydronic radiant floor
CONV = Fin-tube convectors
COIL = Fan coil
OTHR = Other than hydronic heating

Access Level: Installer

Conditions: Only available when a tekmarNet® system
control is connected.

W1 PUMP

Select whether the primary or mix system pump on
a tekmarNet® system control should operate while

the first stage of heat W1 is operating.
Access Level: Installer Range: OFF or ON
Conditions: Only available when a tekmarNet®

system control is connected and the Setup menu
setting W1 TERM is set to CTRL, HRF1, HRF2,
CONV, or COIL.

Range: OFF, ROOM, FLOR (floor),
OUT (outdoor)

Default: ON

Range: CTRL, HRF1, HRF2,
CONV, COIL, OTHR

Default: CTRL

Default: ON

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Setup Menu (2 of 2)

Setting Display

W1 THERMAL MOTOR

Select whether the first stage of heat W1 operates a
thermally actuated zone valve (wax actuator). When
set to ON, there is a 3 minute delay before operating
the pump and any heat sources.

Access Level: Installer Range: OFF or ON
Conditions: Setup menu setting W1 TERM is set to

CTRL, HRF1, HRF2, CONV, or COIL.

W CYCLES PER HOUR

Select the number of heating cycles per hour.
SYNC = Synchronize thermostats to a 20 minute

cycle.
AUTO = Automatic cycles per hour to minimum

temperature swings.
Access Level: Installer Range: SYNC, AUTO, 2 to 12
Conditions: Setup menu setting W1 TERM is set to

OTHR (other) or the thermostat is not connected to

®

a tekmarNet

system control.

BASELOAD

Select the level of radiant floor baseload heating.
This warms the floor so that solar gain and / or air
heating systems do not cause cold floors.

Access Level: Installer Range: OFF, LOW, MED, HIGH
Conditions: Only available when a tekmarNet® system

control is connected and the Setup menu setting W1
TERM is set to HRF1 or HRF2 and SENSOR 1 or
2 is not set to FLOR (floor).

AIR GROUP MEMBER

Select if the thermostat is a member of an air group
or cooling group.

Access Level: Installer Range: NONE, 1 to 16
Conditions: The thermostat must be connected to

other thermostats using tekmarNet®.

Default: OFF

Default: SYNC

Default: OFF

Default: NONE

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Sequence of Operation

-----------------------------------------------

----------------------------------------

--------------------------------------------

----------------------------------------------

Heating Operation

Set Heat Temperature

When using only a room temperature sensor, the thermostat operates the heating
system to maintain the Set Heat Room temperature.

When using only a floor temperature sensor, the thermostat operates the heating
system to maintain the Set Heat Floor temperature. In this case, the thermostat
does not try to control the air temperature. This is ideal for bathrooms and some
kitchen applications where the customer wants their feet to feel warm on the floor.
This is also ideal for garages so that the heating system is not affected by the
opening of the garage door in cold outdoor weather.

When using both a room and a floor temperature sensor, the thermostat always
maintains the Floor Minimum temperature, even when the air temperature is satisfied.
When the air temperature is below the Set Heat Room temperature, the thermostat
operates the heating system to maintain the Set Heat Room temperature. The
floor is never heated above the Floor Maximum setting in order to protect the floor
covering. Suggested Floor Maximum settings are 90°F (32°C) for tile, stone, or
concrete floors and 85°F (29°C) for wood floors.

The “Heat On” symbol is shown on the display when the thermostat is heating.

Room Minimum and Maximum

Room Minimum and Maximum temperature settings are available in the Set Temp
menu. These allow the installer to select start and stop limits for the temperature
setting for the User and Limited access levels. This is useful in commercial
installations and child / guest bedrooms where availability of the full temperature
setting range may not be desirable.

-----------------------------------------------

----------------------------------------

Section A

Warm Weather Shut Down

When the outdoor air temperature exceeds the Warm Weather Shut Down (WWSD)
setting on the tekmarNet® main control, the heating system is shut off.

Radiant Floor Baseload

When the terminal unit is selected to be a Hydronic Radiant Floor (HRF1 or HRF2)
and no floor temperature sensor is installed, the thermostat has option to provide
baseload heating. This allows the radiant floor to be heated even though the room
air temperature is satisfied. This is useful in areas where a radiant floor heating zone
is overlapped by an air heating system. The radiant floor heating is overwhelmed by
the quick heat up rate of the air heating system, resulting in a radiant floor heating
zone that rarely turns on. The radiant baseload option allows the radiant floor to
counteract the air heating system by heating the floor at a reduced output even when
the room air temperature is satisfied. This is also useful in areas that experience
large solar gains through windows. The radiant baseload is automatically shut off
in the summer by the warm weather shut down feature.

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Freeze Protection

----------------------------------------------------

----------------------------------------------------------

------------------------------------------------------------

---------------------------------------

---------------------------------------------------

The thermostat operates the heat whenever the room or floor temperature falls
below 40°F (4.5°C) even when the mode is set to off.

----------------------------------------------------

Exercising

When connected to a tekmarNet® system control, the thermostat exercises the heat
relay for 10 seconds every 3 days. Exercising helps prevent zone valves or zone
pumps from failing due to precipitate buildup. During exercising, the thermostat
shows “TEST” on the display.

Flushing

The flushing feature is for open-loop systems that use a domestic hot water tank
as a heat source. Flushing ensures that fresh potable water is circulated through
the system once each day. If the thermostat is connected to a tekmarNet® system
control with the Flushing feature turned on, the thermostat display will display
“FLUSHING” for the duration of the flushing operation.

Hydronic System Supply Pump

When connected to a tekmarNet® system control, the thermostat’s W1 Pump setting
affects how the primary pump or mix pump on the system control operates. When
connected to the boiler bus, the boiler system or primary pump is operated. When
connected to the mix bus, the mix system pump is operated.

If the thermostat operates a motorized or thermal motor zone valve, the W1 Pump
setting should be set to On.

If the thermostat operates a thermal motor (wax actuator) zone valve, set the W1
Thermal Motor setting to On. This provides a three minute delay to allow the zone
valve to open before the primary or mix pump is turned on.

In special applications with multiple zoning manifolds, the W1 Pump setting can
be set to Off. This allows a Zone Group Pump located on the Zone Manager, or
Wiring Center to operate the pump for the manifold.

----------------------------------------------------------

------------------------------------------------------------

---------------------------------------

DHW Tank Priority

When a tekmarNet® system control is heating an indirect Domestic Hot Water (DHW)
tank, the thermostat may shut off the heating zones to allow the DHW tank to recover
quickly. This is determined by the DHW priority of the tekmarNet® system control.

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Air Group Operation

Section C

In order to prevent heating and cooling at the same time, this thermostat can operate
together with other thermostats on a tekmarNet® system to form an air group. On
older model thermostats the air group functionality was previously described as
a cool group.

In an air group, one thermostat is assigned as the air group master. The air group
master operates the cooling equipment for the group. This thermostat can be set
to be a member of the air group.

When operating as a air group, the air temperature readings of all the air group
member thermostats are communicated to the air group master thermostat and
an average temperature is determined.

When the air group master is in cooling operation, the air group member thermostats
do not operate the heating system for air heating.

If the Set Heat Room temperature is adjusted while the air group is cooling,
COOL is flashed on the display to alert the user that the air group cooling system
is presently on and heating is not available. Once the cooling system shuts off,
heating is available if required.

Air Group

Master

tekmarNet Communication

Time Clock

MemberMember

Section D

The thermostat includes a time clock that is automatically visible in the Home
menu when a programmable schedule is used. If the schedule is not used, the
user has the option to select whether the time is shown in the Home menu.

During a loss of power, the thermostat continues to keep the correct time
and date for at least 4 hours. If the power is off for more than 4 hours, the user

will need to set the time.
The thermostat supports automatic update for daylight savings time. Simply set

Daylight Save to On together with the correct day, month, and year and the time
is automatically updated each spring and fall.

®

When connected to a tekmarNet

system, adjustment of the time on one thermostat
updates all connected thermostats. This option can be disabled by selecting the
Local Network Group setting to be On.

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Temperature Adjustment

--------------------------------

-------------------------------

-----------------------------------------------------

Section E

Permanent Adjustment - No Schedule

When no programmable schedule is used, touch the up or down arrows to permanently
set the “Set Heat” temperature. This thermostat is capable of controlling the air or
floor temperature. When set to control the floor temperature alone, the display will
show “Floor” instead of “Room”.

Permanent Adjustment - With Schedule

When a programmable schedule is used, there are two room heating temperatures
available, one for the

touching the up or down arrows to change the temperature, only the temperature
for the current time period is changed.

1. To adjust the temperature for both time periods, press and hold the Home button
for 3 seconds to enter the programming menu.

2. Enter the “SET TEMP” menu to adjust the following settings:

Set Heat Room (air heating or air heating with floor sensor)

•
Set Heat Room (air heating or air heating with floor sensor)

•
Set Heat Room AWAY (air heating or air heating with floor sensor)

•
Floor Min (air heating with floor sensor)

•
Floor Min (air heating with floor sensor)

•
Set Heat Floor (floor heating sensor only)

•
Set Heat Floor (floor heating sensor only)

•

Temporary Hold

Temporary hold allows a user to change the temperature for a period of time and then
automatically return to the permanent temperature setting. This is especially useful
in commercial buildings that are in use for short amounts of time. When selected,
touching the up or down arrows changes the temperature for either 3, 6, 9 or 12
hours. If the thermostat is using a schedule, ‘Schd’ provides a temporary hold until
the next schedule event time. After the temporary hold time expires, the thermostat
returns to normal operation. By default, the temporary hold feature is off.

time period and another for the time period. When

-----------------------------------------------------

--------------------------------

-------------------------------

When the temporary
hold feature is enabled,
touching the up or
down arrow displays
‘TEMPORARY HOLD’.

Use the Up or Down

arrow to select a

temperature.

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Tap the hour
setting until
the preferred
length of time
is displayed.

Cancel the

temporary

hold.

‘HOLD’ is displayed while the
thermostat is operating at the

temporary hold temperature.

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Programmable Schedules

Section F

Lowering the room temperature setting reduces the amount of fuel required to heat
the building resulting in energy savings.

When operating on a programmable schedule, a or a symbol is shown in the
home menu. The or indicates the current operating temperature.

All schedules are stored in permanent memory and are not affected by a
loss of power.

Display Action

Day temperature

Night temperature

This thermostat can operate on a programmable schedule in order to automatically
lower the room temperature setting. Options include:

Turning off the schedule (OFF)

•
Operate a schedule that applies only to this thermostat zone (ZONE)

•
The ability to operate one of the four system-wide schedules as a master (Schedule

•
Master 1 through 4*)

Join one of the four system-wide schedules as a member (Schedule Member

•
1 though 4*)

*Requires the thermostat to be connected to a tekmarNet® system.
Once the type of schedule has been selected, the thermostat can support schedules

that have either:

2 events per day

•
4 events per day

•

Schedules with four events per day are common for residential use while two events
per day are common for commercial installations.

The schedules can be repeated every:

24 hours

•
7 days (week)

•

A 7 day schedule allows a unique time to be set to change the temperature for
each day of the week.

The schedule also includes a “SKIP” option that allows the programmable schedule
to skip a temperature change and remain at the previous temperature setting. The
“SKIP” setting can be found between 11:50 PM (23:50 hours) and 12:00 AM (0:00
hours).

When a programmable schedule is selected, there is a time delay for the room to
warm up from the temperature to the temperature. The thermostat has the
option to use Optimum Start to predict the heat up rate of the room. When Optimum
Start is set to On, the heating is started in advance to allow the room to reach the
Set Room temperature at the time set in the programmable schedule.

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Scenes (System Override)

-----------------------------------------------------------

---------------------------------------------------

Section G

Scenes provide an easy way to save energy while away on vacation, or override
a programmable schedule when plans change.

Away Key

-----------------------------------------------------------

This thermostat includes an Away Key to quickly turn down the heating temperature
on all thermostats and suspend heating the domestic hot water tank to maximize
energy savings. To turn on the Away Key, go to the Scene menu.

To activate the Away scene, touch “Going Away” on the
screen.

Select PERM (permanent) or a number of days using

•
the or arrow. Range is 1 to 180 days.

Press the home button to accept the setting or leave

•
the screen untouched for several seconds.

“Scene Away” is displayed on the home screen until

•
the number of days expires.

Touch “Cancel Away” to cancel at any time.

•

The temperature is not adjustable while the thermostat
is in Away.

Additional Scenes

---------------------------------------------------

Additional energy saving scenes are available when a User Switch or Gateway is
installed. A complete listing of each scene is shown below.

Scene

Number

1

2
3
4

5

6

7

8

Scenes
= None
Operation

Permanent
or Schedule

Scene 1 Away Away Away
Scene 1 Scene 1
Scene 1Scene 1Configurable

Scene 1 Scene 1

Scene 1 Scene 1

Scene 1 Scene 1

Scene 1 Scene 1

Scenes
= Away
Operation

Permanent
or Schedule

Scenes
= All
Operation

Permanent
or Schedule

Permanent Permanent

Permanent
or Schedule

Temporary
3 Hours

Temporary
4 Hours

Temporary
8 Hours

Scenes
= Guest
Operation

Permanent

Permanent
Permanent

or Schedule

Permanent

Permanent

Permanent

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Recommendation on How to Use Scenes

-----------------------------

Choosing how to use scenes depends on the needs and lifestyle of the customer
using the building.

-----------------------------

Multi-Tenant Apartments

Scenes should be disabled (None) in multi-tenant buildings where the each occupant
has differing heating requirements.

Residential Homes

Some residential customers may not require scenes, in which case, scenes can be
disabled (None). Home owners that wish to save on energy costs should consider
using the Away scene to save energy while away from the property (example:
vacation or holidays).

The use of the Guest scene is useful in residential applications where there are a
number of spare bedrooms that are occupied on an infrequent basis. Each spare
bedroom would be setup to operate on the Guest scene. The remaining thermostats
can be setup to operate on the None, Away or All scene configuration. Normally,
the spare bedrooms would operate at the moon temperature settings. When guests
arrive, scene 5 can be activated through the use a User Switch or Gateway. The
spare bedroom then operates at the temperature settings or operates on a
programmable schedule if a schedule has been setup. When guests depart, the
scene can be changed back to scene 1 and the spare bedrooms resume operation
at the temperature settings.

Commercial Buildings

Commercial buildings are typically in use on a predictable schedule and normally
the building can operate in scene 1. In order to accommodate staff working overtime
or cleaning staff, a 3 or 8 hour temporary override is available when installed in
conjunction with a User Switch or Gateway. In these cases, the thermostats should
be setup to use the All scene configuration. At the touch of a button, the whole
building changes from operating on a programmable schedule (typically at the
temperature setting when not occupied) to operating at the temperature settings
for 3 hours (scene 6) or 8 hours (scene 8). After the timer counts down and expires,
the scene changes back the previous scene.

Secondary Temperature Display

Section H

This thermostat can display the outdoor or floor temperature in the upper right hand
corner of the display. Touch the upper right hand corner to toggle the item currently
displayed. Display of the floor or outdoor temperature requires a connection to an
outdoor or floor temperature sensor, or the thermostat is connected to a tekmarNet®
system that includes an outdoor sensor. The reading of the outdoor sensor connected
directly to the thermostat takes precedence over any outdoor sensor reading available
on the tekmarNet® system.

or

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Access Levels

The thermostat Toolbox menu supports four access levels: Installer (INST), User
(USER), Limited (LTD), and Secure (SEC). The access level can be adjusted when
the thermostat is unlocked. There are two locations to lock the thermostat:

1) Locally on the back of the thermostat using the Lock switch

®

2) Globally on the tekmarNet

(if installed)
Both the local and global lock settings must be set to unlock before the thermostat

access level is adjustable.
The selection of the access level is dependent on the use of the building and the

type of occupants.
Installer - Suitable for HVAC installers only. Times out to User access level after 24

hours.

User - Suitable for most residential homeowners.
Limited - Suitable for rental properties or commercial buildings where some level of

temperature adjustment is required.
Secure - Suitable for schools, churches, and other public buildings where temperature

adjustment is not desired.

system control using the Lock switch or Access level

Section I

tekmarNet® Address

When connected to a tekmarNet® system, each thermostat will be automatically given an
address. The address is useful as a troubleshooting tool to locate thermostats with errors
and also allows room naming on a Gateway.

The address consists of the bus water temperature followed by the thermostat device
number. Available buses are b (boiler), 1, 2 and 3. Device numbers range from 01 to

24. If the thermostat is used without a tekmarNet® system control, the bus number is not

shown.
When using the thermostat together with a Gateway, it is important that each address be

changed to be manually set. This allows each thermostat to be named on the Gateway.
If two thermostats are manually set to the same address, an error message will appear.

The error remains until one of the addresses is manually changed to a vacant address
or to Auto.

It is highly recommended to keep a documented list of thermostat addresses. This is
extremely helpful when troubleshooting errors. The tekmarNet® system control will display
the addresses of thermostat’s that have errors. By referring to the address documentation,
it simplifies the process to locate and correct error messages.

Screen Clean Menu

Entering the Screen Clean menu gives you 30 seconds to clean the thermostat and
display with a moist cloth. Do not use solvents to clean the thermostat.

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Section J

Section K

Troubleshooting

Error Messages (1 of 5)

Error Message Description

SETUP MENU SAVE ERROR

The thermostat failed to read the Setup menu settings from
memory and has reloaded the factory default settings. The
thermostat stops normal operation until all settings in the Setup
menu are checked except to provide freeze protection.

To clear the error, set the access level to Installer and check all
settings in the Setup menu.

SET TEMP MENU SAVE ERROR

The thermostat failed to read the Set Temp menu settings from
memory and has reloaded the factory default settings. The
thermostat stops normal operation until all settings in the Set
Temp menu are checked except to provide freeze protection.

To clear the error, set the access level to Installer and check all
settings in the Set Temp menu.

MONITOR MENU SAVE ERROR

The thermostat failed to read the Monitor menu settings from
memory and has reloaded the factory default settings. The
thermostat continues to operate normally while displaying this
error.

To clear the error, set the access level to Installer and check all
settings in the Monitor menu.

SCHEDULE MENU SAVE ERROR

The thermostat failed to read the Schedule menu settings
from memory and has reloaded the factory default settings.
The thermostat continues to operate normally while displaying
this error.

To clear the error, set the access level to Installer and check all
settings in the Schedule menu.

TOOLBOX MENU SAVE ERROR

The thermostat failed to read the Toolbox menu settings from
memory and has reloaded the factory default settings. The
thermostat continues to operate normally while displaying this
error.

To clear the error, set the access level to Installer and check all
settings in the Toolbox menu.

TIME MENU SAVE ERROR

The thermostat failed to read the Time menu settings from memory
and has reloaded the factory default settings. The thermostat
continues to operate normally while displaying this error.

To clear the error, set the access level to Installer and check all
settings in the Time menu.

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Error Messages (2 of 5)

Error Message Description

SCENES MENU SAVE ERROR

The thermostat failed to read the Scenes menu settings from
memory and has reloaded the factory default settings. The
thermostat continues to operate normally while displaying this
error.

To clear the error, set the access level to Installer and check all
settings in the Scenes menu.

DISPLAY MENU SAVE ERROR

The thermostat failed to read the Display menu settings from
memory and has reloaded the factory default settings. The
thermostat continues to operate normally while displaying this
error.

To clear the error, set the access level to Installer and check all
settings in the Display menu.

tN2 PORT ERROR

The thermostat has been connected to a tN2 zone already in
use by a 2-stage zoning control. A 2-stage device requires two
tN2 ports to operate. This device may be connected to one
such port.

To clear the error, move the thermostat’s tN2 wires to an unused
tN2 port on the zoning control.

tekmarNet® COMMUNICATION ERROR

The tekmarNet® communication bus has either an open or a
short circuit. The result is that there are no communications.
Check for loose wires between tN4 and C. Check for short
circuits between the tN4 and C wires on the House Control,
Wiring Center, or Zone Manager. Check for correct polarity
between the C and R wires.

The error clears automatically once the wiring fault has been
corrected.

To force the error to clear while allowing a short or open circuit
to continue, touch the Cancel key.

ADDRESS ERROR

Two thermostats have been manually set to the same address.
The thermostat continues to operate with this error but does not

communicate with the tekmarNet® system.
To clear this error, select an unused tekmarNet® address or

select automatic addressing.

DEVICE LIMIT

More than 24 devices (thermostats or setpoint controls) have
been connected to the tekmarNet® communication bus. To clear

the error, remove and relocate devices to other available buses
until the device count is 24 or less.

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Error Messages (3 of 5)

Error Message Description

ROOM SENSOR SHORT CIRCUIT ERROR

Due to a short circuit, the thermostat is unable to read the built­in room temperature sensor. If Sensor 1 or 2 is set to Room, or

the thermostat is connected to a tekmarNet® system control, the
thermostat continues to operate, otherwise operation stops.

The error cannot be field repaired. Contact your tekmar
representative for repair procedures.

ROOM SENSOR OPEN CIRCUIT ERROR

Due to an open circuit, the thermostat is unable to read the built­in room temperature sensor. If Sensor 1 or 2 is set to Room, or

the thermostat is connected to a tekmarNet® system control, the
thermostat continues to operate, otherwise operation stops.

The error cannot be field repaired. Contact your tekmar
representative for repair procedures.

SENSOR 1 SHORT CIRCUIT ERROR

Due to a short circuit, the thermostat is unable to read auxiliary
Sensor 1. The thermostat stops normal operation if Sensor 1
is the only active Room or Floor sensor or if a Floor Maximum
temperature has been set.

Check the auxiliary sensor wire for short circuits according to
the sensor installation manual. It may be necessary to replace
the auxiliary sensor. Once the error has been corrected, the
error message automatically clears.

SENSOR 1 OPEN CIRCUIT ERROR

Due to an open circuit, the thermostat is unable to read auxiliary
Sensor 1. The thermostat stops normal operation if Sensor 1
is the only active Room or Floor sensor or if a Floor Maximum
temperature has been set.

Check the auxiliary sensor wire for short circuits according to
the sensor installation manual. It may be necessary to replace
the auxiliary sensor. Once the error has been corrected, the
error message automatically clears.

If the auxiliary sensor 1 has been intentionally removed, set the
Sensor 1 setting in the Setup menu to Off.

SENSOR 2 SHORT CIRCUIT ERROR

Due to a short circuit, the thermostat is unable to read auxiliary
Sensor 2. The thermostat stops normal operation if Sensor 2
is the only active Room or Floor sensor or if a Floor Maximum
temperature has been set.

Check the auxiliary sensor wire for short circuits according to
the sensor installation manual. It may be necessary to replace
the auxiliary sensor. Once the error has been corrected, the
error message automatically clears.

®

sales

®

sales

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Error Messages (4 of 5)

Error Message Description

SENSOR 2 OPEN CIRCUIT ERROR

Due to an open circuit, the thermostat is unable to read auxiliary
Sensor 2. The thermostat stops normal operation if Sensor 2
is the only active Room or Floor sensor or if a Floor Maximum
temperature has been set.

Check the auxiliary sensor wire for short circuits according to
the sensor installation manual. It may be necessary to replace
the auxiliary sensor. Once the error has been corrected, the
error message automatically clears.

If the auxiliary sensor 2 has been intentionally removed, set the
Sensor 2 setting in the Setup menu to Off.

NO SENSOR ON ERROR

All of the temperature sensors have been set to Off including
the built-in room sensor.

To clear the error, the Room Sensor, Sensor 1 or Sensor 2 must
be set to measure a temperature.

SYSTEM CONTROL LOST ERROR

The thermostat can no longer communicate to the tekmarNet®
system control. Check for open or short circuits in the tekmarNet®

communication wiring. The error automatically clears once the
tekmarNet

If the tekmarNet® system control was intentionally removed from
the system, remove and then re-apply power to the thermostat
to clear the error.

AIR GROUP MEMBER ERROR

The thermostat can no longer detect its air group or cooling
group master thermostat through the tekmarNet® system.
To clear the error, either select a heat-cool thermostat to be

the air group master or set this thermostat’s air group member
setting in the Setup menu to be set to None.

SCHEDULE MASTER ERROR

Two thermostats on the tekmarNet® system have been set to the
same Schedule Master number. The thermostat operates at the

temperature settings while this error is present.

To clear the error, select a different Schedule Master number,
set a different Schedule Member number, set the Schedule to
Zone, or set the Schedule to None.

SCHEDULE MEMBER ERROR

The thermostat can not longer detect its schedule master. The
thermostat operates at the

this error is present.
To clear the error,

set the Schedule to Zone, or set the Schedule to None.

®

system control has been detected.

temperature settings while

select a different Schedule Member number,

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Error Messages (5 of 5)

Error Message Description

ERROR AT THERMOSTAT

There is an error on a different thermostat or setpoint
control connected to the tekmarNet® system and not on this

thermostat.
01 to 24 = There is an error on a thermostat or setpoint control
with this tekmarNet

ERROR AT THERMOSTAT

There is an error on a different thermostat or setpoint
control connected to the tekmarNet® system and not on this

thermostat.
b:01 to b:24 = There is an error on a thermostat or setpoint

control wired to the boiler communication bus with this
tekmarNet® address.

ERROR AT THERMOSTAT

There is an error on a different thermostat or setpoint
control connected to the tekmarNet® system and not on this

thermostat.
1:01 to 1:24 = There is an error on a thermostat or setpoint
control wired to communication bus 1 with this tekmarNet®

address.

ERROR AT THERMOSTAT

There is an error on a different thermostat or setpoint
control connected to the tekmarNet® system and not on this

thermostat.
2:01 to 2:24 = There is an error on a thermostat or setpoint
control wired to communication bus 2 with this tekmarNet®

address.

ERROR AT THERMOSTAT

There is an error on a different thermostat or setpoint
control connected to the tekmarNet® system and not on this

thermostat.
3:01 to 3:24 = There is an error on a thermostat or setpoint control
wired to the mix 3 bus with this tekmarNet® address.

®

address.

ERROR AT SYSTEM CONTROL

There is an error on the tekmarNet® system control connected
to the tekmarNet® system and not on this thermostat.

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Frequently Asked Questions

MODE

Symptom Look for... Corrective Action

indicates heat relay W1 is on. If the
is displayed and there is no heat,

check if the zone valve or zone pump is

No heat

operating.

The thermostat is in the Off mode. Touch
the mode key to change to Heat.

No or
keys

Heat on before
scheduled time

Touching

key does
not increase
temperature

Touching
key does not
decrease
temperature

Flashing

Flashing

Flashing

Flashing

Touch the ‘Cancel Away’ key on the display.

Optimum Start “learns” the heat up and
cool off rate of the room and starts the
heating or cooling early so that the room is
comfortable at the scheduled time.

The thermostat has reached the room
maximum setting and cannot be adjusted
any higher. If required, the room maximum
setting can be adjusted in the Set Temp
menu.

The floor has reached the floor maximum
setting. If required, floor maximum can be
adjusted in the Set Temp menu.

Warm weather shut down is in effect.
Increase WWSD if heat is necessary.

The thermostat has reached the room
minimum setting and cannot be adjusted
any lower. If required, the room maximum
setting can be adjusted in the Set Temp
menu.

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Technical Data

tekmarNet® Thermostat 552; One Stage Heat

Packaged weight
Enclosure
Dimensions
Approvals

Ambient conditions

Power supply

W1 Relay
Sensors:

– Included None
– Optional

0.8 lb. (350 g)

White ABS / PC plastic

5” H x 3-1/4” W x 15/16” D (127 x 82 x 23 mm)

Meets Class B: ICES & FCC Part 15

Indoor use only, 32 to 122°F (0 to 50°C),
RH ≤90% non-condensing

24 V ±10%, 50/60 Hz, 1.8 VA Standby, 56 VA fully loaded, NEC
/ CEC Class 2

24 V (ac) 2 A

NTC thermistor, 10 kΩ @ 77°F (25°C ±0.2°C) ß=3892

tekmar type # 070, 071, 072, 073, 076, 077, 078, 079, 082, 084

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Limited Warranty and Product Return Procedure

Limited Warranty The liability of tekmar under this warranty is limited. The Purchaser, by taking receipt

of any tekmar product (“Product”), acknowledges the terms of the Limited Warranty in effect at the time
of such Product sale and acknowledges that it has read and understands same.

The tekmar Limited Warranty to the Purchaser on the Products sold hereunder is a manufacturer’s pass­through warranty which the Purchaser is authorized to pass through to its customers. Under the Limited
Warranty, each tekmar Product is warranted against defects in workmanship and materials if the Product
is installed and used in compliance with tekmar’s instructions, ordinary wear and tear excepted. The pass­through warranty period is for a period of twenty-four (24) months from the production date if the Product is
not installed during that period, or twelve (12) months from the documented date of installation if installed
within twenty-four (24) months from the production date.

The liability of tekmar under the Limited Warranty shall be limited to, at tekmar’s sole discretion: the cost of parts
and labor provided by tekmar to repair defects in materials and / or workmanship of the defective product; or to
the exchange of the defective product for a warranty replacement product; or to the granting of credit limited to
the original cost of the defective product, and such repair, exchange or credit shall be the sole remedy available
from tekmar, and, without limiting the foregoing in any way, tekmar is not responsible, in contract, tort or strict
product liability, for any other losses, costs, expenses, inconveniences, or damages, whether direct, indirect,
special, secondary, incidental or consequential, arising from ownership or use of the product, or from defects in
workmanship or materials, including any liability for fundamental breach of contract.

The pass-through Limited Warranty applies only to those defective Products returned to tekmar during the war­ranty period. This Limited Warranty does not cover the cost of the parts or labor to remove or transport the defec­tive Product, or to reinstall the repaired or replacement Product, all such costs and expenses being subject to
Purchaser’s agreement and warranty with its customers.

Any representations or warranties about the Products made by Purchaser to its customers which are different
from or in excess of the tekmar Limited Warranty are the Purchaser’s sole responsibility and obligation. Pur­chaser shall indemnify and hold tekmar harmless from and against any and all claims, liabilities and damages
of any kind or nature which arise out of or are related to any such representations or warranties by Purchaser
to its customers.

The pass-through Limited Warranty does not apply if the returned Product has been damaged by negligence by
persons other than tekmar, accident, fire, Act of God, abuse or misuse; or has been damaged by modifications,
al ter ati ons or att ach men ts m ade su bse que nt t o purc has e wh ich have not bee n auth ori zed by te kmar; o r if th e Prod ­uct was not installed in compliance with tekmar’s instructions and / or the local codes and ordinances; or if due to
defective installation of the Product; or if the Product was not used in compliance with tekmar’s instructions.

THIS WARRANT Y IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IM PLIED, WHICH THE GOVERNI NG
LAW ALLOWS PARTIES TO CONTRACTUALLY EXCLUDE, INCLUDING , WITHOUT LIMITATION, IMPLIED WAR­RANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, DURABILITY OR DESCRIP­TION OF THE PRODUCT, ITS NON-INFRINGEMENT OF ANY RELEVANT PATENTS OR TRADEMARKS, AND
ITS COMPLIANC E WITH OR NON -VIO LATION OF AN Y APPL ICAB LE ENVIRO NMEN TAL , HEALTH OR SAFETY
LEGISLATION; THE TERM OF ANY OTHER WARRANTY NOT HEREBY CONTRACTUALLY EXCLUDED IS LIM­ITED SUCH THAT IT SHALL NOT EXTEND BEYOND TWENTY-FOUR (24) MONTHS FROM THE PRODUCTION
DATE, TO THE EXTENT THAT SUCH LIMITATION IS ALLOWED BY THE GOVERNING LAW.

Product Warranty Return Procedure All Products that are believed to have defects in workmanship or materi­als must be returned, together with a written description of the defect, to the tekmar Representative assigned to
the territory in which such Product is located. If tekmar receives an inquiry from someone other than a tekmar
Representative, including an inquiry from Purchaser (if not a tekmar Representative) or Purchaser’s customers,
regarding a potential warranty claim, tekmar’s sole obligation shall be to provide the address and other contact
information regarding the appropriate Representative.

WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects
or other reproductive harm. For more information: www.watts.com/prop65

Product design, software and literature are Copyright ©2014 by tekmar Control Systems Ltd.,
A Watts Water Technologies Company. Head Offi ce: 5100 Silver Star Road, Vernon, B.C.
Canada V1B 3K4, 250-545-7749, Fax. [phone]

All specifications are subject
to change without notice

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Web Site

: www.tekmarControls.com