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© 2011
D 315 - 04/11
Power Source
(L, N, Ground)
Zone Group
Pump
(L, N, Ground)
(red)
Figure 1 - Connect
Line Voltage Wires
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 315.
tekmarNet
®
4 Thermostats
The tN4 Wiring Center 315 is designed to operate with
tekmarNet
®
4 Thermostats. They provide a synchronized
end switch on the Wiring Center and communicate with
any other tN4 device on the system.
Connect the tN4, C, R and W terminals from each
thermostat to the corresponding terminals for each
zone on the Wiring Center.
Ensure the tN4 and C wires are not reversed.
Conventional Thermostats
The tN4 Wiring Center 315 may be used with conventional
and ‘power stealing’ type thermostats. However, the end
switch synchronization feature will not be available.
Install the thermostat to the appropriate R and W ter-
minals on the 315.
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Low Voltage Wiring
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The enclosure may be mounted directly to a wall or to
an electrical junction box.
Ensure that the high voltage wires are neatly tucked
inside the electrical junction box.
Using 2 of the 4 holes in the back of the enclosure, securely
fasten it to the electrical junction box with 2 #10 screws as
shown in Figure 2.
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Install The Enclosure
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Figure 2
Important Note:
Do not mix tekmarNet
®
4 and conventional thermostats on
the same wiring center.
Zone Valves
Wire the zone valves to the C and Vlv terminals on the 315.
End switches on zone valves are not required when
using the 315.
tN4 Expansion Terminals (tN4 thermostats only)
The 315 uses the Expansion tN4 and C terminals to communicate
with additional Wiring Centers, House Controls, and other
tekmarNet
®
devices.
Connect the tN4 and C Expansion terminals on the 315
to the corresponding tN4 and C Expansion terminals of
the additional external device.
Wiring the End Switch
The 315 can operate a single on-off boiler or provide a
demand to a tekmar control.
Connect the X X End Switch terminals on the 315 to the
T-T (or R-W) terminals on the boiler.
If required, use the X X End Switch terminals to switch
24 V (ac) to power a demand on a tekmar outdoor reset
control.
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