Tekmar tekmarNet 2 House Control 406 Installation & Operation Manual page 19

Mechanical
Description: The House Control 406 operates two water source heat pumps in heating or cooling mode to supply an outdoor
reset water temperature to 4 on board mix temperature zones and 4 tank zones connected to the Tank expansion terminals
with a Wiring Center 313. The 406 also operates a modulating condensing boiler to supply an outdoor reset water temperature
to 4 boiler zones connected to the Boil expansion terminals with a Wiring Center 314. The boiler supplies backup heat to the
tank loop using the transfer pump P7.
Mixing is useful to separate the hot and cold water temperatures required for fancoils from the warm and cool temperatures
required for radiant floor heating and cooling. The Variable Speed Pump P1 is able to mix the water temperature down for
heating or mix the water temperature up above the dewpoint for floor cooling.
IMPORTANT
• When a three water temperature application is selected (WATER TEMP = T+MB), either the Mix or Boiler bus is limited to
the 4 tN2 on board thermostats, and the gateway controls 482 and 483 are unable to communicate to the four on-board tN2
zones on the House Control 406.
Legend
P1 Variable Speed Pump
P2 HP Loop Pump
P3 Boiler System Pump
P4 Tank System Pump
P5 Mix System Pump
P6 DHW Pump
P7 Transfer Pump
S1 Outdoor Sensor
S2 HP Return Sensor
S3 Boiler Sensor
S4 Tank Sensor
tekmarNet ® 2 Thermostats
A1
Backup:
Mod Con
P6
S3
Boiler
P3
Two
Water to Water
Heat Pumps
314
S1
Z9 Z10 Z11 Z12
P7
S2 P2
Expansion
Tank
S5 Mix Sensor
A1 DHW Aquastat
Application Settings
WATER TEMP
ZONES 1-4
BACKUP
BOIL TYPE
HP LOOP
HP TYPE
DHW MODE
406
tekmarNet ® 2 Thermostats
Z5
P4
P1
S4
19 of 48
T+MB (tank + mix + boiler)
MIX
XFER (transfer pump)
0-10
INT
ROT (rotate)
4
313
tekmarNet ® 2 Thermostats
Z6 Z7 Z8
Z1 Z2
P5 S5
© 2011
A406-5
Z3 Z4
D 406 - 12/11