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Tekmar tekmarNet 4 544 Wiring Brochure

tN4 544\ tekmarNet 4 543\ tN4 543

Made by: Tekmar
Type: Wiring Brochure
Category: Thermostat
Pages: 12
Size: 1.90 MB

 

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W 544

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tekmarNet

®

4 Thermostat 544

- Wiring Brochure

Overview

Information 

Brochure

Choose controls

to match

application

1

Application 

Brochure

Design your 

mechanical 

applications

2

Layout

Brochure

Rough-in

wiring 

instructions

3

Wiring

Brochure

Wiring and 

installation of 

specific control

4

Job

Record

Record settings & 

wiring details for 

future reference

6

Data

Brochure

Control settings 

and sequence of 

operation

5

The following brochure describes how to wire the tekmar tekmarNet

®

4 (tN4) thermostat 544. The 544 has outputs for:

one heat stage, one cooling stage and one fan. The 544 has inputs for two auxiliary sensors. The wiring of 544 thermostat 
is simple and cost effective.

Table of Contents:

Definitions .......................................................................2
Rough-In Wiring  .............................................................2
Remove the Wiring Cover  ..............................................3
Mounting the Thermostat  ...............................................3
Wiring Symbols ...............................................................3

Electrical Drawings ......................................................3-7
Wiring the Thermostat .................................................8-9
Troubleshooting the Wiring ........................................... 10

Testing the Wiring ......................................................... 11

Technical Data .............................................................. 12

tNt 544

One Stage Heat, One Stage Cool, One Fan

 

Power:  24 V (ac) ±10% 60 Hz 1.5 VA
Relays: 24 V (ac) 2 A

G1

Rc
Y1
Com
S2
S1
tN4
C
R
Rh1
W1

Fan 1 Relay

G1

Fan 1 Relay
Power Cooling
Cool 1 Relay
Sensor Common
Sensor 2
Sensor 1
tekmarNet  4
Power Neutral
Power 24 V (ac)
Heat 1 Relay
Heat 1 Relay

DIP Switch Functions

992-03

 

Meets Class B: Canadian ICES, FCC Part 15 

®

 
No Power

To isolate

relay, cut

jumper

Terminal Functions

Y1 Rc G1 G1

R

C

tN4

S1

S2

Com

W1

Rh1

24 V (ac)

Power

tN4

Network

1st Stage

Cooling

1st Stage

Heating

DIP

Switches

Auxiliary

Sensors

1st Stage

Fan

Wiring
Cover


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Defi nitions

The following defined terms and symbols are used throughout this manual to bring attention to the presence of hazards of 
various risk levels, or to important information concerning the life of the product.

-  Caution: Refer to accompanying documents.

-  Caution: Refer to accompanying documents.

INSTALLATION

CATEGORY II

- Local level appliances.

 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 
uses as a primary limit control. Other controls that are 

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.
RH   80% to 88°F (31°C), down to 50% from 104 to 
122°F (40 to 50°C). 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.

Rough-In Wiring

Sensor 2

Sensor 1

Fan 1

2 Cond. / 18 AWG

2 Cond. / 18 AWG

2 Cond. / 18 AWG

2 Cond. / 18 AWG

4 Cond. / 18 AWG

1st Stage Cool

Note: 

When multiple wires

run to the same equipment
location, wiring conductors
can share one wire jacket.

1st Stage Heat
24 V (ac) Power
tN4 Network

Zone Manager

• 

Away from equipment, appliances, or other sources of 
electrical interference.

• 

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

• 

Approximately 5 ft. (1.5 m) off the finished floor.

Use standard 18 AWG wire for the thermostat power, stages 
tN4 and sensor connections.

Refer to the diagram below to determine the number of 
conductors to run from each piece of equipment to the 
thermostat location.

intended and certified as safety limits must be placed into 
the control circuit. Do not attempt to service the control. 
Refer to qualified personnel for servicing. Apart from any 
field replaceable fuse(s) there are no user serviceable 
parts. Attempting to do so voids warranty and could result 
in damage to the equipment and possibly even personal 
injury or death.


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Mounting the Thermostat

If a single or double gang switch box is used, mount the 
thermostat directly to the box.

• 

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

• 

Use the upper and lower screw holes to fasten the 
thermostat to the box.

Remove the Wiring Cover:

To remove the wiring cover:

• 

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

• 

While pushing against the plastic tab, lift off the wiring 
cover.

 The electrical drawing examples on the following 

pages show the 544 in common applications. Choose 
the drawing that most accurately depicts the components 
in your system and use that drawing as a guide to aid in 
wiring your system.

These are only concept drawings, not engineered drawings. 
They are not intended to describe a complete system nor 
any particular system. It is up to the system designer to 

 Electrical Drawings

OR

Wiring Symbols

Dry contact switch. Operates a device.

Do not apply power

 to these terminals. 

Serious control damage will result.

Powered switch. 24 V (ac), switched 
output to valve, pump relay etc. 

tekmarNet

®

4

Factory jumper.

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 upper and lower screw holes to fasten 
the thermostat to the wall. At least one of the screws 
should enter a wall stud or similar rigid material.

determine the necessary components for and configuration 
of the particular system being designed including additional 
equipment isolation relays (for loads greater than the 
controls specified output ratings) and any safety devices 
which in the judgement of the designer are appropriate in 
order to properly size, configure and design that system 
and to ensure compliance with building and safety code 
requirements.

Stud

Thermostat

Base

Terminal

Cover

1

/

4

(83 mm)

Switch Box

Stud

Wall

Thermostat

Base

Terminal

Cover


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Electrical Application

544 E1

tNt 544

One Stage Heat, One Stage Cool, One Fan

 

Power:  24 V (ac) ±10% 60 Hz 1.5 VA
Relays: 24 V (ac) 2 A

G1

Rc
Y1
Com
S2
S1
tN4
C
R
Rh1
W1

Fan 1 Relay

G1

Fan 1 Relay
Power Cooling
Cool 1 Relay
Sensor Common
Sensor 2
Sensor 1
tekmarNet   4
Power Neutral
Power 24 V (ac)
Heat 1 Relay
Heat 1 Relay

DIP Switch Functions

992-03

 

Meets Class B: Canadian ICES, FCC Part 15 

®

 
No Power

To isolate

relay, cut

jumper

Terminal Functions

10

9

8

7

6

5

12

11

4

3

2

1

544 tNt

Slab Sensor

079

tN4

C

R

W

Zone Manager

Factory installed jumper 
connects R to Rh1 
(terminals 11 to 12) To 
isolate Rh1-W1 relay,
cut jumper

Cooling Equipment

1 Stage Cooling
1 Stage Fan

Rc Y1 G1

Outdoor Sensor

070

Y1 Rc

G1

Com

S2

S1

tN4

C

R

Rh1 W1

G1

Description:

One Stage Heating (H1 = Radiant), One Stage Cooling (C1 = Compressor), One Speed Fan (F1 = C1), Fan Mode = 1.

Legend:

Sensor 1 = Floor
Sensor 2 = Outdoor


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Electrical Application

544 E2

tNt 544

One Stage Heat, One Stage Cool, One Fan

 

Power:  24 V (ac) ±10% 60 Hz 1.5 VA
Relays: 24 V (ac) 2 A

G1

Rc
Y1
Com
S2
S1
tN4
C
R
Rh1
W1

Fan 1 Relay

G1

Fan 1 Relay
Power Cooling
Cool 1 Relay
Sensor Common
Sensor 2
Sensor 1
tekmarNet   4
Power Neutral
Power 24 V (ac)
Heat 1 Relay
Heat 1 Relay

DIP Switch Functions

992-03

 

Meets Class B: Canadian ICES, FCC Part 15 

®

 
No Power

To isolate

relay, cut

jumper

Terminal Functions

10

9

8

7

6

5

12

11

4

3

2

1

544 tNt

tN4

C

R

W

Zone Manager

Factory installed jumper 
connects R to Rh1 
(terminals 11 to 12) To 
isolate Rh1-W1 relay,
cut jumper

Cooling Equipment

Y1 Rc

Com

S2

S1

tN4

C

R

Rh1 W1

Rc Y1 G1

1 Stage Cooling
with Fan

Indoor Sensor

076

Ventilation

Equipment

G1 G1

G1 G1

Slab Sensor

079

Description:

One Stage Heating (H1 = Radiant), One Stage Cooling (C1 = Compressor & Fan), One Ventilation Fan (F1 = Vent),
Fan Mode = None.

Legend:

Sensor 1 = Room
Sensor 2 = Floor


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Description:

One Stage Heating (H1 = Coil), One Stage Cooling (C1 = Coil), One Speed Fan (F1 = H1 & C1), Fan Mode = 2.

Legend:

Sensor 1 = Remote
Sensor 2 = Room

Electrical Application

544 E3

tNt 544

One Stage Heat, One Stage Cool, One Fan

Power:  24 V (ac) ±10% 60 Hz 1.5 VA
Relays: 24 V (ac) 2 A

G1

Rc
Y1
Com
S2
S1
tN4
C
R
Rh1
W1

Fan 1 Relay

G1

Fan 1 Relay
Power Cooling
Cool 1 Relay
Sensor Common
Sensor 2
Sensor 1
tekmarNet   4
Power Neutral
Power 24 V (ac)
Heat 1 Relay
Heat 1 Relay

DIP Switch Functions

992-03

Meets Class B: Canadian ICES, FCC Part 15 

®

No Power

To isolate

relay, cut

jumper

Terminal Functions

10

9

8

7

6

5

12

11

4

3

2

1

544 tNt

tN4

C

R

W

Zone Manager

Factory installed jumper 
connects R to Rh1 
(terminals 11 to 12) To 
isolate Rh1-W1 relay,
cut jumper

Cooling Coil

Fan

Y1 Rc

Com

S2

S1

tN4

C

R

Rh1 W1

Rc

Y

Indoor Sensor

076

G1 G1

G1 G1

Universal Sensor

071


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Electrical Application

544 E4

tNt 544

One Stage Heat, One Stage Cool, One Fan

 

Power:  24 V (ac) ±10% 60 Hz 1.5 VA
Relays: 24 V (ac) 2 A

G1

Rc
Y1
Com
S2
S1
tN4
C
R
Rh1
W1

Fan 1 Relay

G1

Fan 1 Relay
Power Cooling
Cool 1 Relay
Sensor Common
Sensor 2
Sensor 1
tekmarNet   4
Power Neutral
Power 24 V (ac)
Heat 1 Relay
Heat 1 Relay

DIP Switch Functions

992-03

 

Meets Class B: Canadian ICES, FCC Part 15 

®

 
No Power

To isolate

relay, cut

jumper

Terminal Functions

10

9

8

7

6

5

12

11

4

3

2

1

544 tNt

Factory installed jumper 
connects R to Rh1 
(terminals 11 to 12) To 
isolate Rh1-W1 relay,
cut jumper

HVAC Equipment

Y1

G1

Com

S2

S1

tN4

R

G1

1 Stage Heat
1 Stage Cooling
1 Stage Fan

R

C

Y1

W

G1

tN4

C

Other

tN4 Thermostat

C

Outdoor Sensor

070

Universal Sensor

071

Rc

Rh1 W1

Description:

One Stage Heating (H1 = Furnace), One Stage Cooling (C1 = Compressor), One Speed Fan (F1 = H1 & C1), Fan Mode = 2.

Legend:

Sensor 1 = Remote
Sensor 2 = Outdoor


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Wire the tN4 communication to terminals tN4 and C.

If a Zone Manager is used:

• 

Connect the tN4 on the thermostat to the tN4 on the 
proper zone of the Zone Manager used for the first stage 
of heat. The C terminal is already connected.

If a Zone Manager is not used:

• 

Connect the tN4 on the thermostat to the tN4 on another 
tN4 device on the same tN4 bus. 

• 

Connect the C on the thermostat to the C terminal on 
another tN4 device on the same tN4 bus.

 tN4 Communication

 

Terminals 8, 9

Wire the first stage of heating to the Heat 1 Relay. 
(Rh1 - W1)

• 

Use these terminals as a switch to operate the first stage 
of heating.

If a Zone Manager is used:

• 

Connect W1 on the thermostat to W on the proper 
zone of the Zone Manager.

If a Zone Manger is not used:

• 

Determine if the factory jumper must be cut.

• 

When the factory jumper is not cut, W1 is a powered 
output that is internally connected to R.

• 

When the factory jumper is cut, Rh1- W1 is an isolated 
switch. No power is available from these terminals.

 Heat 1 Relay

 

Terminals 11, 12

Wire 24 V (ac) to terminals C and R.

If a Zone Manager is used:

• 

Connect C on the thermostat to C on the proper zone 
of the Zone Manager. 

• 

Connect R on the thermostat to R on the proper zone 
of the Zone Manager.

If a 24 V (ac) transformer is used: 

• 

Connect C on the thermostat to C on the transformer. 

• 

Connect R on the thermostat to R on the transformer.

 Power (24 V (ac))

 

Terminals 9, 10

Zone Manager

Thermostat

Zone Manager
or Thermostat

Thermostat

Zone Manager

Thermostat

*

Factory installed jumper connects terminals R to Rh1 

(To isolate Rh1-W1 relay, cut jumper)

Note:

 This connection is polarity sensitive.

Wiring the Thermostat:

9

C

10

R

tN4

C

R

W

8

tN4

9

C

10

R

tN4

C

R

W

9

C

10

R

Rh1 W1

11

12

tN4

C

R

W

Wire the first stage of cooling to the Cool 1 Relay. 
(Rc - Y1)

• 

Rc - Y1 is an isolated switch. No power is available from 
these terminals

• 

Use these terminals as a switch to operate the first stage 
of cooling.

 Cool 1 Relay

 

Terminals 3, 4

Thermostat

4

3

Y1 Rc

1st Stage 

Cooling


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Wire the first stage of fan to the Fan 1 Relay. (G1 - G1)

• 

G1 - G1 is an isolated switch. No power is available from 
these terminals.

• 

Use these terminals as a switch to operate the first stage 
of fan.

 Fan 1 Relay

 

Terminals 1, 2, 3

Thermostat

The auxiliary sensors are connected to the thermostat on 
terminals Com, S1 and S2.

• 

• 

Connect sensor 1 to terminals S1 and Com.

• 

• 

Connect sensor 2 to terminals S2 and Com.

Do not apply power

 to terminals 5 - 7,

 

permanent 

damage to the sensors and / or thermostat will result!

 Auxiliary Sensors

 

Terminals 5 - 7

Do N

o

t Apply P

o

w

er 

Thermostat

Universal 

Sensor

Outdoor

Sensor

To various tekmar 

sensors

3

2

1

Rc G1 G1

5

Com 

6

S2

7

S1

1st Stage 

Fan


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Troubleshooting the Wiring

The following tests are to be performed using standard 
testing practices and procedures and should only be carried 
out by properly trained and experienced persons.

A good quality electrical test meter, capable of reading 
from  at  least  0 - 300 V (ac),  0 - 2,000,000  Ohms,  and  testing 
for continuity is essential to properly test the wiring and 
sensors.

 

General

5

Com

6

S2

7

S1

8

tN4

9

C

10

R

Rh1 W1

11

12

4

3

2

1

Y1 Rc G1 G1

###


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Testing the Wiring

 Testing 24 V (ac) Power Supply

 

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.

1. 

Remove the front cover from the thermostat.

2. 

Disconnect the wires from the relay that is to be 
tested.

3. 

Use an electrical test meter and check for continuity 
across the relay.

• 

• 

When the relay’s symbol is displayed in the LCD,  
 there should be continuity.

• 

• 

When the relay’s symbol is not displayed in the  
 LCD, there should be no continuity.

4. 

Reconnect the wires to the relay.

5. 

Repeat steps 2 to 4 for each relay that is to be tested.

6. 

Install the front cover on the thermostat.

Cool 1

Fan 1

544 LCD Display Segments

Heat 1

 Testing the Relays

 

To test the sensors, the actual temperature at each sensor 
location must be measured.

Use a good quality digital thermometer with a surface 
temperature probe for ease of use and accuracy. Where 
a digital thermometer is not available, place a spare 
sensor alongside the one to be tested and compare the 
readings.

 Testing the Sensors

 

1. 

Remove the front cover from the thermostat.

2. 

Disconnect the wires from the sensor that is to be 
tested.

3. 

Test the sensor’s resistance according to the 
instructions in the sensor Data Brochure D 070, D 074 
or D 079.

4. 

Reconnect the wires.

5. 

Install the front cover on the thermostat.

To test the tN4 Network, check the wires for continuity.

1. 

Remove the front cover from the thermostat.

2. 

Disconnect the two wires (tN4 and C) at one end and 
connect them together.

 Testing the tN4 Network 

 

3. 

Go to the other end of the wires and disconnect them.

4. 

Using an electrical test meter, check for continuity.

5. 

Reconnect the wires.

6. 

Install the front cover on the thermostat.


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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

Product design, software and literature are Copyright © 2008 by:
tekmar Control Systems Ltd. and tekmar Control Systems, Inc.

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All specifications are subject to change without notice.

Printed in Canada. W 544 - 12/08.

Technical Data:

tekmarNet

®

4 Thermostat 544: 

One Stage Heat, One Stage Cool, One Fan

Control

Microprocessor PID control; This is 

not a safety (limit) control

Packaged weight

1.05 lb. (476 g)

Enclosure

White PVC plastic

Dimensions

4-1/2” H x 4-3/4” W x 7/8” D (114 x 120 x 22 mm)

Approvals

CSA C US, CSA/UL 61010-1, meets Class B: ICES and FCC Part 15

Ambient conditions

Indoor use only, 32 to 122°F (0 to 50°C)

RH   80% to 88°F (31°C), down to 50% from 104 to 122°F (40 to 50°C)

Altitude <6560 feet (2000 m), Installation Category II, Pollution Degree 2

Power supply

24 V (ac) ± 10% 60 Hz, 1.5 VA, NEC / CEC Class 2

W1 Relay

24 V (ac) 2 A

Y1 Relay

24 V (ac) 2 A

G1 Relay

24 V (ac) 2 A

Sensors:

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

- Included

None

- Optional

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

Technical Data

The installer must ensure that this control and its wiring are isolated and / or shielded from strong sources of electromag-
netic noise. Conversely, this Class B digital apparatus complies with Part 15 of the FCC Rules and meets all requirements 
of the Canadian Interference-Causing Equipment Regulations. However, if this control does cause harmful interference to 
radio or television reception, which is determined by turning the control off and on, the user is encouraged to try to correct 
the interference by re-orientating or relocating the receiving antenna, relocating the receiver with respect to this control, 
and / or connecting the control to a different circuit from that to which the receiver is connected.

Cet appareil numérique de la classe B respecte toutes les exigences du Règlement sur le matériel brouilleur du Canada.