Configuration
Configurable Parameters Rover, Trane’s service tool, uses the unit type “heat pump” to determine and download unit configuration
information, such as the default | default configurations for heat |
analog inputs, the default binary | pumps. |
inputs, and the default binary output |
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configurations. See Table 7 for |
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Table 8: Heat pump heating or cooling operation.
Unit Type |
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Cooling Source | Compressor |
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Heating Source | Compressor (none for cooling only units) |
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Compressors | 1 (2 for |
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| BOP 1: Fan on (normally open) |
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| BOP 2: Reversing valve (normally open)* |
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Binary Outputs | BOP 3: Not used |
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BOP 4: Compressor 1 (normally open) |
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| BOP 5: Compressor 2 (normally open)** |
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| BOP 6: Outdoor Air Damper (normally open)*** |
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| BI 1: Low temperature detection, circuit 2 (normally closed)* |
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Binary Inputs | ** |
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BI 2: Condensate overflow (normally closed)† |
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| BI 3: Occupancy (normally open) |
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| Zone: Space temperature (0.0 F calibration) |
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| Set: Setpoint (0.0 F calibration) |
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Analog Inputs | Fan: Fan mode |
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| AI 1: Leaving water temperature |
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| AI 2: Discharge air temperature |
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| Fan operation (heating): Cycling |
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| Fan operation (cooling): Cycling |
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Fan | Fan speed default (heating): On/high |
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| Fan speed default (cooling): On/high |
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| Fan switch (hardwired): Enabled |
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| Unoccupied cooling setpoint: 85 F |
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| Occupied standby cooling: 78 F |
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| The heating and cooling setpoint |
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| Occupied cooling setpoint: 74 F |
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| high and low limits only apply to the |
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| Occupied heating setpoint: 71 F |
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| occupied and occupied standby |
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| Occupied standby heating: 67 F |
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| setpoints. These limits never apply |
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Setpoints | Unoccupied heating setpoint: 60 F |
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| to the unoccupied setpoints. |
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| Cooling setpoint high limit: 115 | F |
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| Cooling setpoint low limit: 40 F |
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| Heating setpoint high limit: 115 | F |
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| Heating setpoint low limit: 40 F |
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| The occupied bypass time is used for timed |
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| Thumbwheel set point: Enabled |
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| override applications. The timed override |
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Occupied Bypass |
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120 minutes |
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| timer is maintained in the unit controller. |
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Timer |
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| When the timed override is applicable, the |
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Leaving Water |
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| controller reports “Occupied Bypass” as its |
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Temperature | Unit specific (20 F ground source or 35 F standard) |
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| effective occupancy mode. |
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Low Limit |
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Location Identifier | Unit specific (maximum of 30 characters) |
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*BOP 2, BI1: Not used on cooling only units.
**BOP 5: Not used on signal compressor unit.
***Configured but not required.
† Optional model number dependent
The leaving water temperature low limit is used for freeze protection of circuit 1 on heat pumps. Circuit 2 is protected by a binary low temperature detection device (freezestat) with a fixed trip point.
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