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This device complies with Part 15 of the FCC rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must 
accept any interference received, including interference that may cause undesired operation.
The installer must ensure that this control and its wiring are isolated and / or shielded from strong sources of electromagnetic 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.

tN4 Gateway 482; 

RS 232

Literature

Submittal, Installation and Operating Manual, Job Record

Control

Microprocessor PID control; This is not a safety (limit) control

Packaged weight

3.6 lb. (1600 g)

Dimensions

6

5

8

" H x 7

9

16

" W x 2

13

16

" D (170 x 193 x 72 mm)

Enclosure

Enclosure A, blue PVC plastic, NEMA type 1

Approvals

CSA C US, meets ICES & FCC regulations for EMI / RFI

Ambient conditions

Indoor use only, 32 to 122°F (0 to 50°C), RH ≤ 92% to 104°F (40°C), down to 50% above 104°F (40°C), 9842 feet (3000 m) maximum altitude

Power Supply

115 V ± 10%, 60 Hz, 45 mA

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 pass-through 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, ordi-

nary wear and tear excepted. The pass-through 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 prod-

uct; or to the exchange of the defective product for a warranty replace-

ment 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 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.
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 replace-

ment 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 obli-

gation. 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 warran-

ties 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 dam-

aged 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 infor-

mation regarding the appropriate Representative.

All specifications are subject to change without notice

Tel: 1-800-438-3903 • Fax: (250) 984-0815

 tekmarControls.com

IOM-T-482 

  2125 

 

© 2021 Watts

Technical Data 

Limited Warranty and Product Return Procedure 

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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