Wiring Guide

9 of 12 © 2009 W 423 - 03/09
DHW and Boiler Sensor (tekmar 082) Terminals 66 - 69
Do Not Apply Power
Sensor mounted in
DHW tank
DHW Com Boil Com
66 67 68 69
Sensor mounted
on boiler pipe
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.
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.
Outdoor Sensor (tekmar 070) Terminals 69 - 70
Connect the two wires from the Outdoor Sensor 070 to the
Com and Out (69-70) terminals. The outdoor sensor is used
by the control to measure the outdoor air temperature.
Note: If an Outdoor Sensor 070 is connected to a tekmarNet
®
4
thermostat in the system, it is not required to be connected
to the control.
Sensor mounted on
exterior wall
Com Out
69 70
Do Not Apply Power
Wiring a DHW Valve Terminals 71 - 72
The control operates a 24 volt DHW zone valve. Power is
provided through an internal transformer to a maximum of
8 VA. Connect the wiring from the zone valve terminals 71
and 72 where terminal 71 is 24 volt C (neutral) and terminal
72 is 24 V R (hot) for opening the valve.
Wiring the Demands (DHW, Setpoint) Terminals 73-78
•
• To generate a DHW Demand a voltage between 20 and
260 V (ac) must be applied across the DHW Demand
terminals (75-76).
•
• To generate a Setpoint Demand, a voltage between
20 and 260 V (ac) must be applied across the Setpoint
Demand terminals (77-78).
24 V (ac) is provided on terminals 73 and 74 to power the
DHW Demand and the Setpoint Demand. Each demand
uses approximately 0.1 VA.
The example shows the wiring to generate a Setpoint
Demand.
DemandDemandRC
SetpointDHW24 V (ac)
787776757473
Switch (from Setpoint
Control or aquastat)
71 72
DHW
C Vlv
DHW Valve