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11

IOM-T-482

  2125 

 

© 2021 Watts

Each thermostat and setpoint control uses the following 
format for addressing: 

Port:Bus:Thermostat Device

The snow melting control does not reports its address to 
the 482. The Bus and Thermostat Device are visible on 
the thermostat and setpoint control’s LCD display. This is 
documented as the ‘tekmarNet Address’ in the thermostat 
data brochure.

Port Number

The leading digit is the Port number. This determined by 
the wiring connection that the thermostat is wired to on 
the 482.

482 tN4 Bus 0 or b = 0

482 tN4 Bus 3 = 3

482 tN4 Bus 1 = 1

482 tN4 Bus 4 = 4

482 tN4 Bus 2 = 2

Bus Number

The second digit is the thermostat bus number. The bus 
number is pre-determined by the wiring of the thermostat 
to a boiler or mixing reset control water temperature bus.
In the event that no reset control is installed, the bus  
number is 0.

The 406 tN4 bus numbering is dependent on the 
WaterTemp and the Zone settings when configuring  
the control.

WATERTEMP

ZONES

TANK BUS

MIX BUS

BOILER BUS

T

1

T + M

1

2

T + B

1

2

T + MB

Mix

1

*

3

T + MB

Boil

1

2

*

*When the 406 is configured in this manner, thermostats on 
this bus are unable to communicate to the Gateway 482.

Thermostat Device Number

The third and fourth digits indicate the thermostat device 
number. The thermostat device number is a two digit 
number that ranges from 01 to 24 and can be determined 
from the thermostat address. To determine the thermostat 
address, please consult the data brochure for the  
appropriate thermostat.

Example 1

A thermostat with bus and thermostat device number of 
b:01 is wired to a model 400 controller boiler bus and in 
turn is wired to the 482 on port 0. This address is 0101.

Example 2

A thermostat with bus and thermostat device number of 
b:24 is wired to a model 423 controller boiler bus and in 
turn is wired to the 482 on port 0. This address is 0424.

Example 3

A group of thermostats are wired together to create a 
stand-alone network. A thermostat with thermostat device  
number 15 is wired to the 482 on port 0. This address  
is 0015.

CONTROL

BUS

BUS #

274

Boiler

1

275

Boiler

1

284

b

1

284

1

2

284

2

3

284

3

4

400

Boiler

1

401

Boiler 

1

402

Mix

1

402

Boiler

2

403

Mix

1

CONTROL

BUS

BUS #

403

Boiler 

2

420

Boiler

1

421

Mix

1

422

Mix1

1

422

Boiler 

2

422

Mix2

2

423

Bus1

1

423

Bus2

2

423

Bus3

3

423

Boiler

4

THERMOSTAT (HEAT ONLY)

THERMOSTAT (HEAT-COOL)

SETPOINT CONTROLS

SNOW MELT

COMMAND

532

552

553

554

557

161

162

654

670

671

Room temperature

Floor temperature***

Mode

Heat setpoint

Cool setpoint

Slab setpoint*

Setpoint control setpoint

Fan

Relative humidity%

Maximum humidity setpoint

Minimum humidity setpoint

Outdoor temperature**

Melt/storm/setpoint enable

* Not supported by some home automation drivers
** Requires an outdoor sensor to be connected to a thermostat, snow melt or boiler control
*** Floor temperature available when a floor sensor is installed to an auxiliary sensor input

Home Automation Commands

Thermostat Addressing 

Summary of Contents for TekmarNet 4

Page 1: ...ion systems Features Installation Operation and Maintenance Manual tekmarNet 4 Gateway 482 IOM T 482 tekmarNet 4 and tekmarNet 2 Compatible CSA C US approved for US and Canada Drivers available for these third party automation systems AMX Clare Controls Control4 Crestron Elan RTI Savant URC and Vantage home automation systems Trademarks are the property of their respective third party WARNING Plea...

Page 2: ... length of each tN4 bus cannot exceed 5000 feet Each tN4 bus consists of a pair of wires tN4 and C The tN4 Gateway can accept up to 5 tN4 buses Use a Category 5 cable up to or less than 150 feet 45 m in length to connect the tN4 Gateway to the home automation equipment To avoid serious personal injury and damage to the equipment Improper installation and operation of this control could result in d...

Page 3: ...rol mount it onto the DIN rail This will be a popular option for those who pre fer to mount the control inside a larger electrical panel The wiring can enter the bottom or the back of the enclosure Knock outs provided in the base allow the wiring to be run in conduit up to the enclosure The base also has holes that line up with the mounting holes of most common electrical boxes Press down at the f...

Page 4: ...d off red red Caution Signal wiring must be rated at least 300 V H2051A Power L 1 N 5 C1 1 6 tN4 3 C0 0 4 tN4 7 C2 2 8 tN4 9 C3 3 10 tN4 11 C4 4 12 tN4 Do not apply power RS 232 Tx Rx To RS 232 Serial Port Adapter 1 Reporting Enable Power On State Off On Description tN4 network of tekmarNet thermostats are connected to a tN4 Gateway 482 Refer to Thermostat wiring brochures for complete wiring sche...

Page 5: ...25 2021 Watts Description A Universal Reset Module 422 and Duel Zone Manager 337 are connected to a tN4 Gateway 482 Refer to W422 and W337 wiring brochures for complete wiring schematic Electrical Application 482 E2 ...

Page 6: ...2125 2021 Watts Electrical Application 482 E3 Description A Universal Reset Module 423 and Power Manager 345 are connected to a tN4 Gateway 482 Refer to W423 and W345 wiring brochures for complete wiring schematics ...

Page 7: ...IOM T 482 2125 2021 Watts Description A tN2 House Control 402 is connected to a tN4 Gateway 482 Refer to the 402 Installation Operation Manual for a complete wiring schematic Electrical Application 482 E4 ...

Page 8: ... terminal 2 Connect 115 V ac neutral N to terminal 1 Connect the ground wire to one of the ground screws provided in the wiring chamber The tN4 Gateway includes five tN4 buses tN4 Bus 0 terminals 3 and 4 tN4 Bus 1 terminals 5 and 6 tN4 Bus 2 terminals 7 and 8 tN4 Bus 3 terminals 9 and 10 tN4 Bus 4 terminals 11 and 12 Each tN4 bus consists of a tN4 terminal as well as a C terminal Polarity is impor...

Page 9: ...is present there is a short circuit fault along the wires It is recommended to replace the tN4 bus wires 5 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...

Page 10: ...er is on Power is off Tx Flashes when RS232 message is sent No RS232 message Rx Flashes when RS232 message is received No RS232 message tN4 Bus 0 tN4 communication on bus 0 b is present No tN4 communication on bus 0 tN4 Bus 1 tN4 communication on bus 1 is present No tN4 communication on bus 1 tN4 Bus 2 tN4 communication on bus 2 is present No tN4 communication on bus 2 tN4 Bus 3 tN4 communication ...

Page 11: ...the thermostat address To determine the thermostat address please consult the data brochure for the appropriate thermostat Example 1 A thermostat with bus and thermostat device number of b 01 is wired to a model 400 controller boiler bus and in turn is wired to the 482 on port 0 This address is 0101 Example 2 A thermostat with bus and thermostat device number of b 24 is wired to a model 423 contro...

Page 12: ...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 dam ages whether direct indirect special secondary incidental or conse quential arising from ownership or use of the product or from defects in workmanship or materials including any liability for fundamental breach of contract T...

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