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© 2011
D 406 - 12/11
WATER TEMP
T+MB (tank + mix + boiler)
ZONES 1-4
MIX
BACKUP
XFER (transfer pump)
BOIL TYPE
1STG (1 stage)
HP LOOP
ON
HP TYPE
ROT (rotate)
DHW MODE
OFF
Expansion
Tank
Freeze
Protection
Device
Application Settings
Mechanical
A406-2
S1
S2
S5
S4
tekmarNet
®
2 Thermostats
tekmarNet
®
2 Thermostats
P1
P2
Z1
Z2
Z3
Z4
P5
Z5
Z6 Z7
Z8
Backup:
Electric Boiler
2 Air to Water
Heat Pumps
P7
Description:
The House Control 406 operates two air 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 314. An electric boiler supplies backup heat using the Backup relay and the Transfer Pump P7.
By setting HP LOOP to ON, the HP Loop Pump P2 will operate whenever there is a call on the tank or mix bus, or when the
transfer pump is on to ensure flow through the storage tank while heating or cooling.
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.
2-Port
Storage tank
Coaxial
Heat Exchanger
S3
314
P1
Variable Speed Pump
P2
HP Loop Pump
P5
Mix System Pump
P7
Transfer Pump
S1
Outdoor Sensor
S2
HP Return Sensor
S3
Boiler Sensor
S4
Tank Sensor
S5
Mix Sensor
Legend
406
