- Wiring Brochure W 423 Universal Reset Module 423 1 Information Brochure 2 Application Brochure Choose controls to match application 3 Design your mechanical applications 03/09 4 Rough-in Wiring 5 Wiring Brochure Wiring and installation of specific control Rough-in wiring instructions Data Brochure Control settings and sequence of operation 6 Job Record Record settings & wiring details for future reference Overview The following wiring brochure describes how to wire the tekmar Universal Re
Table of Contents Wiring Symbols & Definitions ........................................2 Wiring the Control .....................................................8-10 Module Installation .........................................................3 Troubleshooting Instructions ................................... 10-12 Electrical Drawings ......................................................4-7 Technical Data ..............................................................
Module Installation Install the Universal Reset Module 423 in the left side of a tekmarNet®4 (tN4) wiring enclosure. The enclosure comes with a Zone Manager pre-installed in the right side. Review the figure below to understand the installation of the 423. To Install the 423 1. Remove the front cover of the wiring enclosure by removing the two screws. 2. Remove the left side blank by removing the centre screw holding the blank and the Zone Manager in place. Make sure the Zone Manager stays in place. 3.
Electrical Application 423 E1 Description: DHW with Sensor and Pump, Setpoint, Two On / Off Boilers.
Electrical Application 423 E2 Description: DHW with Aquastat and Valve, Setpoint, Single On / Off Boiler.
Electrical Application 423 E3 Description: DHW with Aquastat and Pump, Setpoint, Multi-stage Boiler Control.
Electrical Application 423 E4 Description: DHW with Sensor and Pump, Setpoint, Two Modulating Boilers.
Wiring the Control Terminals 50 - 78 The following section explains how to wire individual devices to the Universal Reset Module 423. For step by step wiring refer to the terminal number on the right of the page. • Before wiring ensure all power is turned off and take all necessary precautions. • Install the supplied wiring compartment barriers by sliding them into the grooves provided as to isolate the low and high voltage wiring. • Strip all wiring to a length of 3/8 in. or 10 mm for all terminals.
DHW and Boiler Sensor (tekmar 082) Terminals 66 - 69 Connect the two wires from the DHW Sensor 082 to the DHW and Com (66-67) terminals. The DHW Sensor is used by the control to measure the DHW water temperature. Sensor mounted on boiler pipe Connect the two wires from the Boiler Sensor 082 to the Boil and Com (68-69) terminals. The Boiler Sensor is used by the control to measure the boiler supply temperature.
Wiring the DHW and Primary Pump Terminals 79 - 80, 81 - 82 The control operates a Primary Pump, and a DHW Pump. • If a Primary Pump is used, the pump is wired directly to terminals 81 and 82. • If a DHW Pump is used, the pump is wired directly to terminals 79 and 80. • The pumps’ ground wires are connected to the ground screw provided in the wiring chamber. Note: For pumps larger than the control’s rated capacity, an external isolation relay must be used.
Testing tN4 Network Terminals 58 - 65 To test each tN4 Network, check the wires for continuity. 2. Go to the other end of the wires and disconnect them. 1. Disconnect the two wires (tN4 and C) at one end and connect them together. 3. Using an electrical test meter, check for continuity. Testing tekmar Sensors Terminals 66 - 70 To test the sensors, the actual temperature at each sensor location must be measured.
Testing DHW and Primary Pump Terminals 79 - 82 1. Remove the front cover from the control. 2. Press the Test Button. Note: The proper DHW mode must be selected before testing the DHW pump output. If power is not present: 3. When the Primary Pump symbol is displayed in the LCD, use an electrical test meter to measure the (ac) voltage between the Primary Pump terminals (81-82). • Check the power supply to the Zone Manager. • Also check the Plug in connections on the underside of the control. 4.
