tekmar 316 tN4 Wiring Center Installation - Manual (Page 5)

5 of 12 © 2011 D 316 - 05/11
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 316.
tekmarNet ® 4 Thermostats
The tN4 Wiring Center 316 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 316 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 316.
•
•
•
•
Low Voltage Wiring ----------------------------------------------------------------------------------- -----------------------------------------------------------------------------------
Ensure that the high voltage wires are neatly tucked
inside the electrical 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 5. •
•
Install The Enclosure --------------------------------------------------------------------------------- ---------------------------------------------------------------------------------
Figure 5
tN4 Expansion Terminals
The 316 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 316
to the corresponding tN4 and C Expansion terminals of
the additional external device.
Wiring the End Switch
The 316 can operate a single on-off boiler or provide a
demand to a tekmar control.
Connect the X X End Switch terminals on the 316 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.
•
•
•
R
C
115 V (ac)
L N G
(red)
(black)
(black)
(black)
(black)
to pump
grounds
Zone 2
Zone 3
Zone 4
Zone 1
Zone Power (L)
Zone 1
Zone 2
Zone 3
Zone 4
Strip wires
1/2 inch (13 mm).
Installed wires are
not removable.
12-18 AWG
316
Rear Line Voltage Wiring Diagram -------------------------------------------------------------------- --------------------------------------------------------------------