tekmar 406 House Control Installation - Manual (Page 42)

© 2012 406_D - 11/12 42 of 48
Pump Operation Section J
Pump Exercising -------------------------------- --------------------------------
The control operates each pump every three days for 10
seconds to help prevent corrosion and/or precipitate build up
that that would cause the pump to seize. The control ensures
that no heat is supplied to the zones during exercising.
HP Loop Pump ----------------------------------- -----------------------------------
The HP Loop Pump operation is explained in Section B.
DHW Pump --------------------------------------- ---------------------------------------
The DHW Pump operation is explained in Section F.
Transfer Pump ----------------------------------- -----------------------------------
The Transfer Pump operation is explained in Section B.
Boiler System Pump ------------------------------ ------------------------------
The boiler system pump operates whenever all the
following conditions are met:
A Boil Call is present and the thermostat calling for heat has
the Heat 1 pump setting set to On.
OR a Backup Call is present and BACKUP is set to XFER
or VAR.
OR a DHW Call is present and DHW MODE is set to 3 or 4.
There is no DHW or Setpoint priority.
The control is not in Warm Weather Shut Down.
Tank System Pump ------------------------------- -------------------------------
The tank system pump operates whenever all the
following conditions are met:
A Tank Call is present.
A thermostat is calling for heating or cooling and the Heat
1 Pump setting is set to On.
The control is not in Warm Weather Shut Down.
Note: The tank system pump does not run when only a Mix
Call is present.
Mix System Pump -------------------------------- --------------------------------
The mix system pump operates whenever all the
following conditions are met:
A Mix Call is present.
A thermostat is calling for heating or cooling and the Heat
1 Pump setting is set to On.
The control is not in Warm Weather Shut Down.
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The House Control 406 operates six different pump outputs
on the back side of the enclosure. The “Pumps” box in the
status field indicates which pumps are operating at any
given time.
Status Field
Mixing Operation Section I
The House Control 406 operates the variable speed pump output
for mixing. The Variable % bar graph in the “Zones” box of the
status field indicates the approximate speed of the pump. Variable Speed Pump
A standard wet rotor circulator can be connected to the Variable
Speed Pump output on the back of the control. The control
varies the circulator speed to maintain the correct mixed supply
water temperature at the mix supply sensor. For heating, the
hot tank water temperature will be mixed down, and for cooling
the chilled tank water temperature will be mixed up.
For correct sizing and piping of the variable speed pump, refer
to essay E 021.
Note: Pumps manufactured with an internal variable speed
controller are not compatible with the House Control.
Manufacturer approved pump models for Variable Speed Pump output.
Grundfos (F) Taco B & G Armstrong Wilo
15-42 15-58 26-64 43-75 003 007 0010 0012 NRF
9
NRF
22
NRF
33
Astro Star S16FX Star
** *** ** *** 25BU 30 50 * ** *** S21FX 17FX 30F
*Speed 1,**Speed 2, ***Speed 3
These circulators have been tested and approved by the manufacturer for use with tekmar variable speed electronics.
The table below gives a list of manufacturer approved pump
models for the Variable Speed Pump output.
Var Status Field