Tekmar 422 Universal Reset Module Manuel d'utilisateur télécharger pdf (Page 27)

Pump Operation Section K

Primary Pump

The primary pump is switched on in the following

situations:

•

• There is a Boiler Demand and that zones thermostat

has H1 Pump set to On.

•

• There is a Mix1 or Mix2 Demand.

•

• There is a DHW Demand and the control is set to DHW

Mode 3 or 4.

•

• The control is completing a DHW Purge.

•

• There is a Setpoint Demand and the control is set to

Setpoint Mode 3 or Mode 4.

Mix System Pump P1

The mixing pump P1 is switched on only when there is a

Mix 1 Demand and that zone’s thermostat has H1 Pump

set to On.

Variable Speed Pump

The variable speed injection pump output operates only when

there is a Mix 1 Demand and the Mixing item in the Adjust

menu is set to variable speed injection pump (VAr).

DHW Pump

The DHW Pump operates whenever there is a DHW Demand

and the control is not in DHW Priority Override.

Mixing

Pump

Primary

Pump

DHW

Pump

Variable

Speed Injection

Pump

Pump Exercising Section L

The system control will exercise all pumps, mixing valves and hydronic zones (zone valves and zone pumps) for 10 seconds

every three days to prevent seizure.

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Tekmar 422 Universal Reset Module Manuel d'utilisateur Page 27