tekmar 314 tN2 Wiring Center Installation - Manual (Page 10)

© 2011 D 314 - 05/11 10 of 12
Sequence of Operation
tekmarNet ® System Section A
tekmarNet ® is a family of products that use communication
to operate the HVAC system in a comfortable and efficient
manner. The Wiring Center is a central component in
a tekmarNet
® system and requires tekmarNet ® 2 (tN2)
Thermostats to be directly connected to it.
The tekmarNet ® 4 (tN4) Expansion terminals can link the
Wiring Center with other tekmarNet ® components:
House Controls 400, 401, 402, 403 - Provides boiler and
DHW control •
Reset Modules 420, 421, 422, 423
Boiler Controls 274, 275
Wiring Centers 313, 314, 315, 316 - Add additional zones
tN4 Thermostats - Add thermostats
tN4 Timer 033 - Adds 4 programmable schedules
tN4 User Switch 479 - Provides a system override for
vacations and holidays
tN4 Setpoint Control 161, 162 - Control hot tubs, pools
and more. •
•
•
•
•
•
•
Relay Outputs Section B
End Switch Operation ------------------------- -------------------------
The End Switch relay (‘XX’) closes and the end switch
LED turns on. The switch remains closed as long as any
zone is calling for heat. This can provide a boiler demand
to a tekmar reset control, or provide a boiler enable to a
boiler’s TT terminals.
If the Wiring Center is connected to a tN4 bus, all
communication messages will pass through the 314’s tN4
expansion connection. tN4 messages are required in order
to create a boiler demand on a device such as a tekmar
House Control 400.
115 V (ac) Zone Relay Operation --------------- ---------------
When a thermostat calls for heat, it sends a message to
the Wiring Center and the corresponding zone LED turns
on. Power is then supplied to the appropriate zone output
as indicated by the LED.
ZONE 1
The zone 1 thermostat is calling for heat
and the 115 V (ac) output is energized.
ZONE 2
The zone 2 thermostat is calling for heat
and the 115 V (ac) output is energized.
ZONE 3
The zone 3 thermostat is calling for heat
and the 115 V (ac) output is energized.
ZONE 4
The zone 4 thermostat is calling for heat
and the 115 V (ac) output is energized.
POWER
24 V (ac) is being applied to the Wiring
Center to provide it with power.
END SWITCH
At least one of the zone thermostats are
calling for heat and the end switch relay
output is closed.
LEDs
User Interface
Power Zone 1
Zone 2
Zone 3
Zone 4
End Switch
Wiring Center 314
Zone LED Flashing ---------------------------- ----------------------------
The zone has an open or short circuit and communication
to the thermostat on the zone has been interrupted. Check
the wiring between the thermostat and the Wiring Center
for open or short circuits. If the thermostat was intentionally
removed, power the Wiring Center off for 10 seconds.