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© 2011
D 406 - 12/11
tekmarNet
®
2 House Control 406
D 406
12/11
Alternative
Energy
Replaces: New
Installation & Operation Manual
Menu
House Control 406
Item
Benefi ts
Energy efficiency through Outdoor Temperature Reset
with Indoor Temperature Feedback
Indoor Temperature Feedback minimizes the water
temperature (increasing energy savings), and the ef-
ficiency of your mechanical equipment through inte-
grated tekmarNet
®
Thermostats
Zone Synchronization reduces equipment cycling
Auto Differential - Reduces boiler cycling
Compact enclosure for flexible installation
Simple zone expansion using Wiring Centers
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Features
One or two-stage heat pump control
Equal runtime rotation for two heat pumps
On/off or modulating boiler control
Tank, mix and boiler outdoor reset temperatures
Domestic hot water operation
Setpoint operation
Mixing with variable speed pump
For use with tekmarNet
®
2 Thermostats
Four 24 V (ac) built in powered zone valve outputs
Expand to 24 zones on two water temperatures using
tekmarNet
®
4 expansion ports
CSA C US Certified for use in USA and Canada
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Introduction
The tN2 House Control 406 is designed to operate the
equipment in a 2-pipe, single tank, hydronic heating and
cooling system. It operates two heat pump stages (water-
to-water or air-to-water) with a backup heat source (boiler
or electric resistance). The heat pump provides either hot
or chilled water to a storage tank loop and optional mixed
temperature loop. For radiant heating, the water temperature
is calculated using outdoor temperature reset. For radiant
cooling, the chilled water temperature is maintained at an
adjustable setpoint, or is adjusted using dew-point reset with
a humidity sensor. A backup boiler can provide an outdoor
reset water temperature as well as domestic hot water and
setpoint water temperatures. The 406 operates 4 on-board
heating and cooling zones and is expandable up to 52 zones
total on the boiler, tank, and mix water temperatures.
Note
For hydronic cooling with a fancoil, use tekmarNet® 2
thermostat 530 or tekmarNet® 4 thermostat 540 with a
date code of
December 2011
or newer.
For floor cooling, use tekmarNet® 2 thermostats 527,
528, 529, 530 or tekmarNet® 4 thermostats 537, 538, and
540 with a date code of
December 2011
or newer.
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