Tekmar tekmarNet 2 House Control 406 Installation & Operation Manual page 13

Mechanical
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.
Legend
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
tekmarNet
Coaxial
Heat Exchanger
2 Air to Water
Heat Pumps
Freeze
Protection
Device
®
2 Thermostats
S3
Backup:
Electric Boiler
P7
S2 P2
2-Port
Storage tank
13 of 48
Application Settings
WATER TEMP
ZONES 1-4
BACKUP
BOIL TYPE
HP LOOP
HP TYPE
DHW MODE
314 406
S1
Z5 Z6 Z7 Z8
S4 P1
Expansion
Tank
A406-2
T+MB (tank + mix + boiler)
MIX
XFER (transfer pump)
1STG (1 stage)
ON
ROT (rotate)
OFF
®
tekmarNet 2 Thermostats
Z1 Z2
P5 S5
© 2011 D 406 - 12/11
Z3 Z4