tekmar 400 House Control Installation - Manual (Page 7)

© 2013 400_D - 09/13 7 of 32
R
C
L
N
Expansion
tN4 Boil
Ct
N
4
Modulating
Boiler
—+
2
1
Menu
House Control 400
Item
+
Com
Boil
Out
DHW
Vlv C Vlv C Vlv C
Zone 3 Zone 1 Zone 2 Zone 4
Vlv C
Com
Zone 1 Zone 2 Zone 3 Zone 4
tN2 tN2 tN2 tN2 tN2 tN2 tN2 tN2
Sensors - No P
ow
er
Call
Call
tN4
C
Mod dc/mA
Boil Exp.
Se
tpoint
DHW
R C
Input Power
H8005B
Made in Canada
Use at least 167°F
(75°C) conductors
Stag
e 2
Stage 1
Zone Valves
24 V (ac) Transformer 009
DHW Call
from DHW
Tank Aquastat
(optional)
Setpoint Call
Outdoor
Sensor
070
Boiler Supply
Sensor 082
DHW Tank
Sensor 082
One or Two Stage
Boiler T-T
tekmarNet ® 2 Thermostats
Front Low Voltage Wiring Diagram ------------------------------------------------------------------- -------------------------------------------------------------------
Sensor Wiring
The temperature sensor (thermistor) is built into the 070
enclosure.
Remove the screw and pull the front cover off the
sensor enclosure.
The 070 can either be mounted directly onto a wall or
a 2” x 4” electrical box. When the 070 is wall mounted,
the wiring should enter through the back or bottom of
the enclosure. Do not mount the 070 with the conduit
knockout facing upwards as rain could enter the enclo-
sure and damage the sensor. •
•
In order to prevent heat transmitted through the wall
from affecting the sensor reading, it may be necessary
to install an insulating barrier behind the enclosure.
The 070 should be mounted on a wall which best rep-
resents the heat load on the building (a northern wall
for most buildings and a southern facing wall for build-
ings with large south facing glass areas). The 070
should not be exposed to heat sources such as venti-
lation or window openings.
The 070 should be installed at an elevation above the
ground that will prevent accidental damage or tampering. •
•
•
Mounting the Outdoor Sensor 070 -------------------------------------------------------------------- --------------------------------------------------------------------
Sensor with bottom
entry wiring Sensor with rear
entry wiring Sensor mounted
onto 2" x 4"
electrical box
tekmarNet ® 4
Expansion to
Wiring Centers,
Timers, or
User Switch