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.
8 of 8
All specifications are subject to change without notice.
Printed in Canada. W 543 - 12/08.
Technical Data:
tekmarNet
®
4 Thermostat 543:
Two Stage Heat
Control
Microprocessor PID control; This is
not a safety (limit) control
Packaged weight
1 lb. (454 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, 2.5 VA, NEC / CEC Class 2
W1 Relay
24 V (ac) 2 A
W2 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 # 071, 070, 072, 073, 076, 077, 078, 079
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.
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.
