Mechanical a406-3 – tekmar 406 House Control Installation User Manual
Page 15
15 of 48
© 2012 406_D - 11/12
Geo Field
Expansion
Tank
Mechanical
A406-3
S1
S2
S4
P3
tekmarNet
®
2 Thermostats
tekmarNet
®
2 Thermostats
P7
P2
Z1
Z2
Z3
Z4
P4
Z5
Z6
Z7
Z8
Backup:
Mod-Con
Boiler
P6
S3
DHW
Setpoint
Description: The House Control 406 operates a 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 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 313. The
boiler supplies backup heat to the tank loop using the transfer pump P7.
To allow the heat pump to operate for some amount of time before the transfer pump starts adding heat to the storage tank,
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. Placing the Transfer Pump P7 on the upstream side of the storage tank allows for hot water temperatures from the
boiler loop to be buffered by the storage tank to prevent sending hot water out to the tank temperature zones.
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.
Water-to Water
Heat Pump
WATER TEMP
T+B (tank + boiler)
ZONES 1-4
TANK
BACKUP
XFER (transfer pump)
BOIL TYPE
0-10
HP LOOP
INT
HP TYPE
1STG
DHW MODE
2
Application Settings
P2
HP Loop Pump
P3
Boiler System Pump
P4
Tank System Pump
P6
DHW Pump
P7
Transfer Pump
S1
Outdoor Sensor
S2
HP Return Sensor
S3
Boiler Sensor
S4
Tank Sensor
S5
DHW Sensor
Legend
S5
406
313