Tekmar D540, tekmarNet 2 530, tekmarNet 4 530 Installation & Operation Manual

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Page 1

tekmarNet®4 Thermostat 540

Installation & Operation Manual

D540

08/10

Replaces:03/09

D 540 - 08/10

Zoning

The tekmarNet®4 Thermostat 540 provides operation for:

One Stage Heat One Stage Cool One Stage Fan

•

Introduction

Features

Requires 7 wires (tN4, C, R, W, Rc, Y, G)

Outdoor temperature display Bright backlight 2 button temperature adjustment Communication with other

tekmarNet® devices improves system efficiency and comfort

Schedule member status enables setback operation

Optimum start Responds to tekmarNet® Scenes

Cooling Group Master Freeze protection Exercising Zone synchronization

•

Beneﬁ ts

Energy savings Reduced temperature swings

Compatible with tekmarNet® Timers, User Switches and Gateway for additional control

Interlock prevents simultaneous heating & cooling

•

Page 2

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.

Getting Started

Preparation

tekmar or jeweller screwdriver Phillips head screwdriver

•

Wire Stripper•

Tools Required

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

Materials Required

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

2, #6 x 1” Wood Screws 18 AWG LVT Solid Wire

(Low Voltage Connections)

•

Optional Adapter Plate 007 (for installation on 2” x 4” gang box)

•

Installation

Table of Contents

Getting Started ..............................2

Installation .........................................2

Preparation ....................................2

Removing The Thermostat Base ...3

Mounting The Thermostat Base ....3

Thermostat Wiring .........................4

Testing the Thermostat Wiring ......5

Mounting the Thermostat ..............6

Cleaning the Thermostat ...............6

Switch Settings ..................................7

User Interface ....................................8

Display...........................................8

Symbols Description .....................8

Button Operation ...........................9

Settings ..................................10-15

Sequence of Operation ....................16

Heating Operation .......................16

Cooling Operation ....................... 17

Fan Operation .............................18

Schedules ...................................19

Scenes (System Override) ..........19

Troubleshooting ...............................20

Error Messages .................... 20-21

Frequently Asked Questions .......22

Job Record ..................................23

Technical Data .............................23

Limited Warranty and Product

Return Procedure ........................24

Caution

Improper installation and operation of this control could result in damage to the equipment and possibly even personal injury or death. It is your responsibility to ensure that this control is safely installed according to all applicable codes and standards. This electronic 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.

Page 3

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 max 92% up to 104°F (40°C), 50% RH above 104°F (40°C).

Non-condensing environment. No exposure to extreme temperatures beyond 36-122°F (2-50°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.

•

Installation Location

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

Removing The Thermostat Base

Push tab

Remove thermostat from base

To remove the thermostat base:

Place a small slot screwdriver or similar tool into the slot located on the top of the thermostat.

While pushing down against the plastic tab, pull the thermostat away from the thermostat’s base.

•

Mounting The Thermostat Base

Stud

Switch Box

Thermostat

Base

007 Adaptor

Plate

/4”

(83 mm)

If a single gang switch box is used, an Adaptor Plate 007 is required to mount the thermostat to the box.

Fasten the base of the thermostat to the adaptor plate.

Feed the wiring through the openings in the back of the adaptor plate and thermostat.

Use the upper and lower screw holes to fasten the adaptor plate to the box.

•

Mounted on switch box

Page 4

If a switch box was not used, mount the thermostat directly to the wall.

Feed the wiring through the openings in the back of the thermostat.

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.

•

Stud

/8”

(60 mm)

screwhole

/8”

(60 mm)

screwhole

Thermostat

Base

Wall

Mounted on wallboard

Thermostat Wiring

The thermostat operates a single heating system zone together with a cooling system and fan.

Connect tN4, C, R, and W terminals on the thermostat to the tN4, C, R and W terminals on the tN4 Wiring Center or Zone Manager.

Connect the Rc, Y and G terminals on the thermostat to the R, Y and G terminals on the cooling equipment.

12 34

tN4 Wiring Center

tN4 Zone Mana

Cooling Equipment

1 Stage Cooling

1 Stage

Fan

G Y R

Fan

Cooling

tN4 C W

1234

tNt 540

540

One Stage Heat / One Stage Cool / One Fan

Made in Canada

Mmm YYYY

Lot # 12345

Meets Class B:

Canadian ICES

FCC Part 15

Power: 24 V ±10% 50/60 Hz 1.8 VA 56 VA fully loaded Relays: 24 V (ac) 2 A

1001-01

tN41C2R3W

Switch Settings:

For instructions see brochure

Use at least 75°C conductors

Setback

Scene

None

Lock

Unlock

Cool Master 1

Oﬀ

Page 5

Testing the Thermostat Wiring

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, Cool, and Fan Relays

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

1. Remove the front cover from the thermostat.

2. Press Mode button until Mode is set to OFF.

3. Set the electrical test meter to continuity.

4. Place probes between R (3) and W (4), then between Rc (5) and Y (6). In both cases there should be no continuity. If there is continuity then there may be a wiring fault or the relay may be faulty.

5. Press Mode button until Mode is set to HEAT.

6. Press the button and set the heating temperature above the current room temperature. Make sure the display does not show “WWSD”. The “H1” symbol should appear on the display.

7. There should be continuity between the R (3) and W (4) terminals.

8. Press Mode button until Mode is set to COOL.

9. Press the button and set the cooling temperature below the current room temperature. The “C1” symbol should appear on the display.

10. There should be continuity between the Rc (5) and Y (6) terminals.

11. Press Fan button to set the fan to Auto.

12. Ensure the fan symbol is not shown on the display.

13. There should be no continuity between Rc (5) and G (7) terminals.

14. Press Fan button to set the fan to On.

15. The “Fan” symbol should appear on the display.

16. There should be continuity between the Rc (5) and G (7) terminals.

Page 6

Mounting the Thermostat

To place the thermostat back on the mounting base:

Place thermostat bottom tabs on matching mounting base notches.

Pivot top of the thermostat towards wall, ensuring wires clear obstructions.

The top clasp makes a clicking sound when properly closed.

•

Pivot Tab

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.

Cleaning the Thermostat

Testing the tekmarNet®4 Bus

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

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.

•

Page 7

Switch Settings

Switches are set to “On” position from the factory, and do not require changing for most applications.

12 34

1234

tNt 540

540

One Stage Heat / One Stage Cool / One Fan

Made in Canada

Mmm YYYY

Lot # 12345

Meets Class B:

Canadian ICES

FCC Part 15

Power: 24 V ±10% 50/60 Hz 1.8 VA 56 VA fully loaded Relays: 24 V (ac) 2 A

1001-01

tN41C2R3W

Switch Settings:

For instructions see brochure

Use at least 75°C conductors

Setback

Scene

None

Lock

Unlock

Cool Master 1

Oﬀ

12 34

1234

Meets Class B:

Switch Settings:

Setback

Scene

None

Unlock

Lock

Cool Master 1

Oﬀ

Switch

Position

Action

SETBACK

The thermostat follows a programmable setback schedule as a schedule member if available. Requires the installation of a Timer 033 to use this feature.

OFF

The thermostat does not follow a programmable setback schedule.

SCENE

The thermostat responds to changes in the scene (system wide manual overrides). Requires the installation of a User Switch 479 to use this feature.

OFF

The thermostat does not respond to scenes.

NONE

The thermostat is not part of a cooling group.

OFF

COOL MASTER 1

The thermostat is a master of cooling group number 1.

LOCK ACCESS LEVEL

Locked to ‘User’ access level. Set to Lock when installation completed.

OFF

UNLOCK ACCESS LEVEL

Unlock to allow ‘User’ and “Installer’ access level. Set to Unlock during installation process.

tekmarNet® reset control must also be set to Unlocked (Installer access level).

Page 8

SECONDARY DISPLAYMAIN DISPLAY

HEAT

Heat is turned on.

COOL

Cooling is turned on.

FAN

Fan is turned on.

SUN

Operating at the occupied (day) temperature.

MOON

Operating at the unoccupied (night) temperature.

COOL GROUP MASTER

Thermostat operates the cooling for a group of thermostats.

CLOCK

Operating on a programmable schedule.

LOCK

Locked to ‘User’ access level.

AWAY

Operating at the Away scene temperature.

tekmarNet

Communication is present.

WARNING SYMBOL

Indicates an error is present.

WARM WEATHER SHUT DOWN

The heating system has been shut off for the summer.

Display

Symbols Description

Switch between

Heat, Cool, Auto

and Off modes

Switch between Auto, On and %

Fan operation

Adjust the current temperature

or displayed setting up or down

User Interface

Page 9

Button Operation

The Mode button selects between Auto, Cool, Heat, and Off. Heat Mode: The heating system operates to maintain the Set

Room Heat temperature. Cool Mode: The cooling system operates to maintain the Set Room

Cool temperature. Auto Mode: The heating system operates to maintain the Set Room Heat temperature.

Likewise the cooling system operates to maintain the Set Room Cool temperature. The thermostat will prevent the Set Room Heat and the Set Room Cool settings from getting closer than 3°F (1.5°C).

To switch from heating to cooling, the heat must be off for at least a 30 minute interlock period and the actual Room temperature must be at least 3°F (1.5°C) above the Set Room Heat temperature.

To switch from cooling to heating, the cooling must be off for at least a 30 minute interlock period and the Room temperature must be at least 3°F (1.5°C) below the Set Room Cool temperature. Cooling has priority over heating.

Off Mode: The heating and cooling are shut off except heating for freeze protection.

Mode

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

Fan

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

The fan button manually turns the fan on or off.

Auto: Fan is usually off but can operate with heating or cooling. On: Fan is on all the time. 10 to 90%: Fan operates a minimum of this percentage each hour.

Press the or the button to select the room temperature. The display indicates whether the “HEAT” or the “COOL” temperature is being changed.

Use the or button to adjust temperature.

If in Auto mode, press the Mode button to toggle between Heat or Cool temperature adjustment.

Room or Temperature

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

Page 10

Settings (1 of 6)

Display Range Access Description Set to

40 to 95°F

(4.5 to 35.0°C)

Default = 70°F

(21.0°C)

Installer

User

SET ROOM HEAT

Set the room heating temperature while in the

event.

40 to 95°F

(4.5 to 35.0°C)

Default = 65°F

(18.5°C)

Installer

User

SET ROOM HEAT

Set the room heating temperature while in the

event.

40 to 95°F

(4.5 to 35.0°C)

Default = 62°F

(16.5°C)

Installer

SET ROOM HEAT AWAY

Set the room heating temperature while in the Away

scene.

Continued on next page.

• Press and hold down both the and buttons for 2 seconds to change from one step to the next.

• Release both buttons once the step has been reached.

• Press the or the button to change the setting, if available.

• Press and hold down both the

and buttons for 2 seconds to go to the next step, OR

• After 10 seconds of no button activity, the display goes back to normal operation.

• Note: Set switch setting #4 and tekmarNet

system control to Unlock to change Access level to Installer.

Press

Together

Page 11

Settings (2 of 6)

Display Range Access Description Set to

50 to 100°F

(10.0 to 38.0°C)

Default = 78°F

(25.5°C)

Installer

User

SET ROOM COOL

Set the room cooling temperature while in the

event.

50 to 100°F

(10.0 to 38.0°C)

Default = 85°F

(29.5°C)

Installer

User

SET ROOM COOL

Set the room cooling temperature while in the

event.

50 to 100°F

(10 to 38.0°C)

Default = 85°F

(29.5°C)

Installer

SET ROOM COOL AWAY

Set the room cooling temperature while in the Away

scene.

Off, 30 sec, On,

On +

Default = 30 sec

Installer

User

BACKLIGHT

Select the backlight operation.

Off = Permanently Off

30 = Temporary on for 30 seconds

On = Permanently On

On + = On during and off during

Continued on next page.

Page 12

Display Range Access Description Set to

°F or °C

Default = °F

Installer

User

TEMPERATURE UNITS

Press the or the button to change from °F to

°C and vice versa.

Device Type with

Software Version,

Address

Installer

User

DEVICE TYPE

Display alternates between the Device Type (large

number) with Software Version (upper right corner)

and the thermostat address.

40 to 95°F

(4.5 to 35.0°C)

Default = 85°F

(29.5°C)

Installer

MAXIMUM SET ROOM HEAT

Set the maximum room heating limit while in the

event.

40 to 95°F

(4.5 to 35.0°C)

Default = 85°F

(29.5°C)

Installer

MAXIMUM SET ROOM HEAT

Set the maximum room heating limit while in the

event.

40 to 95°F

(4.5 to 35.0°C)

Default = 45°F

(7.0°C)

Installer

MINIMUM SET ROOM HEAT

Set the minimum room heating limit.

Settings (3 of 6)

Continued on next page.

Page 13

Display Range Access Description Set to

50 to 100°F

(10 to 38.0°C)

Default = 60°F

(15.5°C)

Installer

MINIMUM SET ROOM COOL

Set the minimum room cooling limit.

50 to 100°F

(10.0 to 38.0°C)

Default = 95°F

(35.0°C)

Installer

MAXIMUM SET ROOM COOL

Set the maximum room cool limit.

OFF, On

Default = OFF

Installer

VENTILATION

Select whether or not ventilation is required.

Setting to on allows the fan to be operated in 10%

increments every hour to circulate air in the building.

0, 1, 2, 3

Default = 1

Installer

FAN MODE

Select how the fan should operate together with heating

and cooling.

0 = Manual operation only

1 = Operate fan with cooling only

2 = Operate fan with heating and cooling

3 = Operate fan with heating only

Settings (4 of 6)

Continued on next page.

Page 14

Display Range Access Description Set to

Auto, 10 to 90%,

Default = Auto

Installer

User

FAN

Set the minimum percentage the fan should operate

while in the event. This provides ventilation for the

building. Each 10% is 6 minutes per hour.

Available when:

• Ventilation is set to On.

Auto, 10 to 90%,

Default = Auto

Installer

User

FAN

Set the minimum percentage the fan should operate

while in the event. This provides ventilation for the

building. Each 10% is 6 minutes per hour.

Available when:

Ventilation is set to On.•

1, 2, 3, 4

Default = 1

Installer

SCHEDULE

Thermostat can follow schedule master 1, 2, 3, or 4.

Available when:

Switch setting 1 is set to Setback (On Position).•

Hyd (Hydronic)

or Oth (Other)

Default =

Hydronic

Installer

HEATING TERMINAL TYPE

Select if the heating for this zone is hydronic or non-

hydronic (other).

Available when:

A reset control is present on the tekmarNet

system.

•

Settings (5 of 6)

Continued on next page.

Page 15

Display Range Access Description Set to

Auto,

SYn(Synchronize)

Default =

Synchronize

Installer

HEAT CYCLES PER HOUR

Select either Auto cycle or Synchronize with other

thermostats on the tekmarNet

system.

Choose Synchronize when zone heated using a boiler.

Choose Auto when zone is non-hydronic heating.

Available when:

No reset control on the tekmarNet

system.•

OFF, dLy (delay),

Default = On

Installer

HEATING SUPPLY PUMP

Select whether or not the system supply pump should

turn on, be delayed (for thermal motor or wax actuator)

or be off to allow a zone group pump per manifold.

Available when:

A reset control is present on the tekmarNet

system

AND Heating terminal type is set to Hydronic.

•

01 to 24

(no reset control),

b:01 to b:24

(reset control - boiler),

1:01 to 1:24

(reset control - mixing)

Installer

tekmarNet

ADDRESS

The address is shown in the large number field. “Auto” is

shown in the upper number field when using automatic

addressing.

Press the or the button to manually select

an address.

The address can be returned to automatic “Auto”

addressing when address set above 24.

None

Installer

User

ESCAPE

Press the or the button to return to normal

operation.

Settings (6 of 6)

Page 16

Heating Operation

Section A

Sequence of Operation

The thermostat operates the heating system to maintain the Set Room Heat temperature. The H1 symbol is shown on the display when the thermostat is heating. The heat can cycle on and off within +/- 1.5°F (1°C) of the Set Room Heat temperature.

Freeze Protection

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

The thermostat operates the heat whenever the room temperature falls below 40°F (4.5°C), regardless of the thermostat mode.

Heat Terminal Unit

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

When the thermostat is connected to a tekmarNet® reset control, the heat source can be either hydronic or non-hydronic.

When the Heat Terminal is set to Hydronic, the thermostat uses indoor temperature feedback to fine tune the water temperature and also synchronizes the start of a heating cycle so that all thermostats start heating at the same time. This reduces cycling on the boiler.

When the Heat Terminal is set to Other, the thermostat does not use indoor temperature feedback. This allows the thermostat to operate non-hydronic heating systems (example: furnace, electric baseboard, or electric fan coil), while remaining connected to the tekmarNet® system.

Exercising

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

When connected to a tekmarNet® reset control, and the heating terminal unit is set to hydronic, 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® reset control with the Flushing feature turned on, the thermostat display will display the “FLUSH” icon for the duration of the flushing operation.

Hydronic System Supply Pump

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

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

If the thermostat operates a motorized zone valve or a zone pump, the Supply Pump setting should be set to On.

Page 17

Cooling Operation

Section B

The thermostat operates the cooling system to maintain the Set Room Cool temperature. The C1 symbol is shown on the display when the thermostat is cooling. The cooling can cycle on and off within +/- 1.5°F (1°C) of the Set Room Cool temperature.

The cooling system has a fixed minimum on time of 2 minutes and a minimum off time of 5 minutes in order to prevent cooling equipment short cycling.

Cooling Groups

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

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 a cool group. When this thermostat is set as the Cool Group 1 master, it operates the cooling equipment for the group. Other thermostats can be set to become members of cool group

1. When the cooling is turned on, all cool group member thermostats ensure the heating is off. This thermostat is the master of Cool Group 1 when switch setting 3 is set to “Cool Master 1” (down position). When operating as a cool group, the air temperature readings of all the cool group member thermostats are displayed on the master as an average.

The cool group average temperature is shown as the “Room” temperature while the mode is set to Cool, or the mode is set to Auto and the thermostat is allowing cooling operation. In all other modes, the cool group master thermostat measures and displays the built-in “local” temperature sensor measurement.

Fluctuations in the displayed “Room” temperature may occur during automatic mode switch over when the display changes from using the local temperature for heating to using the cool group average temperature for cooling.

Cool Group 1

Master

MemberMember

tN2 Communication

If the thermostat operates a thermal motor (wax actuator) zone valve, set the Supply Pump setting to Delay. This provides a three minute delay to allow the zone valve to open before the primary or mix pump is turned on and the boiler is allowed to fire.

In special applications with multiple zoning manifolds, the Supply 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® reset 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® reset control.

Warm Weather Shut Down

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

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

Page 18

The fan relay includes a post purge feature. After the heating is shut off, the fan continues to operate for 30 seconds. After the cooling is shut off, the fan continues to operate for 10 seconds.

The user can also select to operate the fan manually by pressing the Fan button. This allows the user to choose between Auto and On. “Auto” allows the fan to operate together with heating or cooling but normally the fan is off. “On” forces the fan to operate continuously.

The fan button is inactive when the Fan Mode is 0 and Ventilation is set to Off.

Ventilation Fan

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

In order to provide ventilation to the building, the fan can also operate for additional time beyond what is required for the heating and cooling systems. Ventilation allows the user to select the fan to operate for a minimum percentage out of each hour. Options are 10 to 90%, in 10% (6 minutes per hour) increments, as well as Auto and On. This is available when the Ventilation setting in the Adjust menu is set to On.

Once Ventilation is set to On, the Fan minimum run time percentage during the and events can be set so that the fan can operate on a schedule and/or together with scenes.

Fan Operation

Section C

Fan Mode The fan operates with...

0 Not With Heating Nor Cooling (Only with fan button) 1 Cooling Only 2 Heating and Cooling 3 Heating Only

The thermostat normally operates the fan together with the heating and cooling systems. This is determined by the Fan Mode setting in the Adjust menu.

Page 19

Schedules

Section D

Lowering the room temperature setting reduces the amount of fuel required to heat the building resulting in energy savings. Likewise, raising the cooling temperature results in energy savings.

This thermostat can follow a programmable schedule in order to automatically lower the room temperature setting. A schedule master such as a Timer 033 is required in order to gain programmable schedule functionality.

When operating on a programmable schedule, a

symbol is shown, as well as a

or a . The or indicates the current operating temperature.

If a symbol does not appear, there is no schedule available.

Display Action

Occupied temperature. No schedule.

Unoccupied temperature. No schedule.

Programmable schedule at

occupied

temperature.

Programmable schedule at

unoccupied

temperature.

Scene Display Room Temperature Setting

or or

Follows programmable schedule or operates at the occupied temperature.

Away

Away temperature.

Unoccupied temperature.

Scenes (System Override)

Section E

When a programmable schedule is selected, there is a time delay for the temperature to change from the temperature to the temperature.

The thermostat uses Optimum Start to predict the heat up and cool off rate of the room. The optimum start feature allows the room to reach the set room temperature by the time set in the programmable schedule. This applies for both heating and cooling.

Scenes provide an easy way to save energy while away on vacation, or override a pre-set schedule when plans change. tekmarNet® devices such as a User Switch 479 provide scene adjustment.

This thermostat responds to the following scenes:

While in the Away scene, the room temperature cannot be changed using the or

buttons. Change the scene from Away to or to change the temperature.

Page 20

Troubleshooting

Error Messages (1 of 2)

Error Message Description

CONTROL ERROR

The thermostat was unable to correctly read settings from memory and has reloaded the factory

default settings. The thermostat does not operate the heating, cooling, or the fan while this error

message is present.

Error clears once all adjust menu settings in the Installer access level (unlocked) have been

checked. Set thermostat’s switch setting #4 to unlock and unlock the tekmarNet

system control.

Then press and hold and buttons together for 2 seconds to enter the adjust menu. Continue

until all settings have been reveiwed.

BUS ERROR

The tekmarNet

4 communication bus has either an open or a short circuit. The result is that there

are no communications. Check for loose wires. 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.

Error clears automatically once wiring fault has been corrected.

If the thermostat is intentionally removed from the tekmarNet

4 bus, press the and buttons

together to clear the error message.

DEVICE LIMIT

The number of devices on the tekmarNet

bus has exceeded 24. Devices include tekmarNet

Thermostats and Setpoint Controls. The device count must be lowered to 24 or less. If possible,

move devices to other tekmarNet

buses.

Error clears automatically once the number of devices on the tekmarNet

bus is at 24 or lower.

Page 21

Error Messages (2 of 2)

Error Message Description

ADDRESS ERROR

This thermostat and another device have been manually given the same tekmarNet

address.

Error clears automatically once this thermostat is given a new manually set address or if the

thermostat is set to automatic addressing.

ROOM SENSOR SHORT CIRCUIT

The built-in air temperature sensor has a short circuit fault.

This error cannot be field repaired.

Contact your wholesaler or tekmar sales representative for details on repair procedures.

ROOM SENSOR OPEN CIRCUIT

The built-in air temperature sensor has an open circuit fault.

This error cannot be field repaired.

Contact your wholesaler or tekmar sales representative for details on repair procedures.

COOL MASTER ERROR

Switch #3 has been selected to become a cool group master of group number 1, and another cool

group master has been detected with the same group number.

The cooling system will not operate while this error message is present.

Error clears once either the other cool group master changes its group number or switch setting

#3 is set to none (On position).

Page 22

Symptom Look for... Corrective Action

No Heat

H1 Symbol

H1 symbol indicates heat is on. Check if zone valve or zone pump is operating.

Flashing

WWSD

Increase WWSD setting on tekmarNet® reset control.

Flashing

Away

Change User Switch to Normal scene 1.

Mode Auto or

Heat

Press Mode button to Auto or Heat mode.

No Cooling

C1 Symbol

C1 symbol indicates cooling is on. Check if cooling relay and cooling equipment are operating.

Flashing

Away

Change User Switch to Normal scene 1.

Mode Auto or

Cool

Press Mode button to Auto or Cool mode.

Heat or Cooling

on yet Fan off

Fan symbol

Fan symbol indicates fan is on. Check if fan relay and fan equipment is operating.

Fan set to Off Ensure fan mode is set correctly.

Heat or cooling

on before

scheduled time

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 comforable at the scheduled time.

Pressing button does not increase temperature

Flashing Max

Installer can increase the Maximum Set Room Heat or Maximum Set Room Cool limits.

Pressing button does not decrease temperature

Flashing Min

Installer can decrease the Minimum Set Room Heat or Minimum Set Room Cool limits.

Frequently Asked Questions

Page 23

Job Record

Item Setting

Set Room Heat

Set Room Heat Away

Set Room Cool

Set Room Cool Away

Backlight

Units

Max Set Room Heat

Min Set Room Heat

Item Setting

Min Set Room Cool

Max Set Room Cool

Ventilation

Fan Mode

Fan

Schedule Member

Heating Terminal Type

Heat Cycles Per Hour

Heating Supply Pump

tekmarNet® Address

Jobsite Location ________________________________________________

Thermostat Location _____________________________________________

Technical Data

tekmarNet®4 Thermostat 540; One Stage Heat, One Stage Cool, One Fan

Packaged weight 0.8 lb. (380 g) Enclosure NEMA 1, white PVC plastic Dimensions 2-7/8” H x 2-7/8” W x 13/16” D (73 x 73 x 21 mm) Approvals CSA C US, meets Class B: ICES and FCC Part 15 Ambient conditions Indoor use only, 36 to 122°F (2 to 50°C).

RH max 92% to 104°F (40°C), and 50% above 104°F (40°C)

Altitude <9840 feet (3000 m), Installation Category II, Pollution Degree 2

Power supply

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

W, Y and G Relays 24 V (ac) 2 A

Page 24

tekmar Control Systems Ltd., Canada tekmar Control Systems, Inc., U.S.A.

Head Office: 5100 Silver Star Road Vernon, B.C. Canada V1B 3K4 (250) 545-7749 Fax. (250) 545-0650

Web Site: www.tekmarcontrols.com

All specifications are subject to change without notice

24 of 24 D 540 - 08/10.

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, alterations or attachments made subsequent to purchase which have not been authorized by tekmar; or if the Product 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 WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, WHICH THE GOVERNING 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 COMPLIANCE WITH OR NON-VIOLATION OF ANY APPLICABLE ENVIRONMENTAL, 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.

Limited Warranty and Product Return Procedure