
© 2008 D 346 - 04/08 2 of 8
Sequence of Operation
Application 1 - On/Off Demands
One application is to provide a method to convert on-off demands into a tN4 message for an outdoor reset water temperature
and send this message to a tN4 reset module. tN4 reset modules include the 420, 421, 422 and 423.
346
Reset
Optional
Mixing
Module
On/Off
Demands
Table of Contents
Sequence of Operation .................................................2
Application 1 - On/Off Demand ................................2
Application 2 - Power for Modules ............................3
On-Off Demand to tN4 Conversion ..........................4
Room Occupied and Unoccupied Settings...............4
Schedules ................................................................4
Auxiliary Pumps .......................................................4
Switch Settings .............................................................5
Room Occupied .......................................................5
Room Unoccupied .................................................... 5
Schedules ................................................................5
LED Status Indicators ...................................................6
Flashing LED Indicated Error Message ........................7
Cleaning the Control .....................................................7
Warranty ....................................................................... 8
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