Overview The following brochure describes how to wire the tekmar tekmarNet 4 (tN4) thermostat 543. The 543 has outputs for two ® heat stages. The 543 has inputs for two auxiliary sensors. The wiring of 543 thermostat is simple and cost effective.
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. –...
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.
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Electrical Application 543 E1 Description: Two Stage Heating (H1 = Radiant, H2 = Fin-tube Convector or Fan Coil). Legend: Sensor 1 = Floor Sensor 2 = Outdoor 543 tNt tNt 543 Two Stage Heat Power: 24 V (ac) ±10% 60 Hz 2.5 VA Relays: 24 V (ac) 2 A 994-01 Meets Class B: Canadian ICES, FCC Part 15...
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Electrical Application 543 E2 Description: Two Stage Heating (H1 = Radiant, H2 = Furnace). Legend: Sensor 1 = Remote HVAC Equipment Sensor 2 = Room 543 tNt tNt 543 Two Stage Heat Power: 24 V (ac) ±10% 60 Hz 2.5 VA Relays: 24 V (ac) 2 A 994-01 Meets Class B: Canadian ICES, FCC Part 15...
Wiring the Thermostat: Power (24 V (ac)) Terminals 5, 6 Wire 24 V (ac) to terminals C and R. Thermostat If a Zone Manager is used: • Connect C on the thermostat to C on the proper zone of the Zone Manager. •...
Auxiliary Sensors Terminals 1 - 3 The auxiliary sensors are connected to the thermostat on terminals Com, S1 and S2. To various tekmar Universal sensors • • Connect sensor 1 to terminals S1 and Com. Sensor Thermostat • • Connect sensor 2 to terminals S2 and Com.
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None – Optional tekmar type # 071, 070, 072, 073, 076, 077, 078, 079 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.