Tracer® ZN.520
switch depending on the error. Fan speed increases as the space temperature rises above the active cooling setpoint.
Table 21. Fan Configuration
Auto fan operation | Fan speed default |
Heating Continuous | Off |
Low |
|
Medium |
|
High |
|
CoolingContinuous | Off |
Low |
|
Medium |
|
High |
|
Additional flexibility built into the controller allows you to enable or disable the local fan switch input. The fan mode request can be either hardwired or communicated to the controller. When both are present, the communicated request has priority over the hardwired input. See the following tables.
Table 22. Local fan switch disabled or not present
Communicated fan speed input | Fan operation | ||
Off |
| Off |
|
Low |
| Low |
|
Medium |
| Medium |
|
High |
| High |
|
Auto (or not present) |
|
|
|
Auto (fan runs at the default speed) |
|
| |
|
|
| |
Table 23. Local fan switch enabled |
|
| |
Communicated | Fan switch (local) | Fan operation | |
fan speed input |
|
|
|
Off | Ignored |
| Off |
Low | Ignored |
| Low |
Medium | Ignored |
| Medium |
High | Ignored |
| High |
Auto | Off |
|
|
Low |
|
|
|
Medium |
|
|
|
High |
|
|
|
Auto | Off |
|
|
| Low |
| Medium |
| High |
| Auto (configured default, determined by heat/cool mode) |
| Table 24. Fan operation in heating and cooling modes |
67 |
