Trane LO - Manual (Page 49)

UNT-IOM-6 49
Tracer
®
ZN.010
and ZN.510
Table 13. Test Sequence for 1-Heat /1-Cool Configurations
Steps
Fan Cool Output Heat Output Damper
BOP1-3 BOP4 (1) BOP5BOP6
1. Off Off Off Off Closed
2. Fan High High Off Off Closed
3. Fan Medium Medium Off Off Closed
4. Fan Low Low Off Off Closed
5. Cool High On Off Closed
6. Heat High Off On Closed
7. Fresh Air High Off Off Open
Damper (3)
8. Exit (2)
Notes:
(1) At the beginning of step 2, the controller attempts to clear all diagnostics.
(2) For all 1-heat/1-cool applications including 2-pipe changeover, BOP4 energizes in the cooling test
stage and BOP5 energizes in the heat test stage.This occurs even though during normal 2-pipe
changeover operation BOP4 controls the unit valve for both cooling and heating.
(2) After the Fresh Air Damper step, the test sequence performs the Exit step.This initiates a reset and
attempts to return the controller to normal operation.
(3) The fresh air damper (BOP6) only energizes during this step if binary output 6 has been configured as
a fresh air damper.