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Front Low Voltage Wiring Diagram --------------------------- ----------------------------------- ------ -
Mix Supply / DHW
Universal Sensor
Tank Supply
Universal Sensor
Boiler Supply
Universal Sensor
HP Return
Universal Sensor
Outdoor Sensor
Setpoint Call
DHW Call
from DHW
Tank Aquastat
(optional)
Low Voltage Wiring - - - ------------------ ------------------------------------------------------- --- --- -- -
----------------------------------- --------------------------------------------------
External Power Supply
It is strongly recommended that a transformer with an in-line
fuse be used in order to protect the transformer from high
currents. The tekmar Transformer 009 includes a fuse.
•
Connect the 24 V (ac) leads from the transformer to the C
and R terminals marked "Input Power" on the 406.
tekmarNet
®
2 Thermostats (tN2)
The 406 is designed to operate with tekmarNet
They provide the heating and cooling control for each zone,
and communicate with any other tekmarNet
system.
•
Connect the tN2 terminals from each thermostat to the cor-
responding tN2 terminals for each zone on the 406.
Zone Valves
•
Wire the zone valves to the C and Vlv terminals on the 406.
•
End switches on zone valves are not required when using
the 406.
tN4 Expansion Terminals
The 406 uses the Expansion tN4 and C terminals to com-
municate with additional thermostats, setpoint controls, and
®
other tekmarNet
devices. Connect to either the Tank or the
Boil / Mix tN4 and C terminals on the 406.
© 2011
D 406 - 12/11
---------------------------------------------------------------------
tekmarNet
®
2 Thermostats
tN2 tN2
tN2 tN2
tN2 tN2
Mix/DHW
tN2 tN2 tN2 tN2 tN2 tN2 tN2 tN2 Rc1 Y1 O/B
No Power
Zone 1
Zone 2
Zone 3
Menu
Item
House Control 406
Zone 1
Zone 2
Zone 3
Zone 4
Input Power
C
Vlv
C
Vlv
C
Vlv
C
Vlv
24 V (ac) Zone Valves
Tank
To add additional Tank water temperature zones to the system,
install a tekmarNet
•
Connect the Tank terminals, tN4 and C, on the 406 to the
corresponding tN4 and C Expansion terminals on the ex-
ternal Wiring Center.
Boil / Mix
To add additional Boil or Mix water temperature zones to the
®
2 Thermostats.
system, install a tekmarNet
•
Connect the Boil/Mix terminals, tN4 and C, on the 406 to
®
device on the
the corresponding tN4 and C Expansion terminals on the
external Wiring Center.
Domestic Hot Water (DHW) or Setpoint Call
When the control receives a DHW Call or Setpoint Call for heat
it will override Outdoor Reset and Indoor Feedback and operate
the boiler to heat the DHW tank or the Setpoint equipment.
•
To create a DHW call, wire a dry contact switch to the DHW
call terminals.
•
To create a Setpoint call, wire a dry contact switch to the
Setpoint call terminals.
6 of 48
tN2 tN2
Zone 4
C
R
R
C
24 V (ac) Transformer 009
®
Wiring Center.
®
Wiring Center.
®
tekmarNet
4 Expansion to
Wiring Centers, Timers, or
User Switch
tN4 Tank
Expansion
tN4 Boil/Mix
Expansion
Modulating
Boiler
1
One Stage
Boiler T-T
One or Two Stage
Heat Pump
L
N
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