Mechanical a406-4 – tekmar 406 House Control Installation User Manual
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© 2012 406_D - 11/12
Description: The House Control 406 operates a two stage water source heat pump in heating or cooling mode to supply an
outdoor reset water temperature to 4 on board tank temperature zones. The 406 also operates an on/off 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 variable speed pump P1.
To allow the heat pump to operate for some amount of time before the variable speed pump starts adding heat to the tank loop,
use the backup delay setting in the adjust menu. This ensures the heat pump is being used to its full potential before backup is
allowed. A non-condensing boiler may be used since P1 provides boiler return protection, preventing flue gas condensation.
Tank zones can have fan-coils, air handling units, chilled beams, or chilled panels as their terminal units depending on the type
of tekmarNet thermostat selected.
Expansion
Tank
Geo Field
Mechanical
A406-4
S1
S2
S4
P3
tekmarNet
®
2 Thermostats
tekmarNet
®
2 Thermostats
P2
Z1
Z2
Z3
Z4
P4
Z5
Z6
Z7
Z8
Backup:
On/Off
Boiler
P6
S3
DHW
P1
S5
Two Stage
Water to Water
Heat Pump
WATER TEMP
T+B (tank + boiler)
ZONES 1-4
TANK
BACKUP
VAR (variable speed pump)
BOIL TYPE
1STG (1 stage)
HP LOOP
INT
HP TYPE
2STG
DHW MODE
2
Application Settings
P1
Variable Speed Pump
P2
HP Loop Pump
P3
Boiler System Pump
P4
Tank System Pump
P6
DHW Pump
S1
Outdoor Sensor
S2
HP Return Sensor
S3
Boiler Sensor
S4
Tank Sensor
S5
DHW Sensor
Legend
406
314