The hot water loop uses a boiler and a variable speed pump to supply hot water.
Required Objects
The hot water loop must have the following property.
- It must have at least 1 hot water coil attached to the loop.
Design Assumptions
- The hot water loop has the following default temperature assumptions.
| Property | Value | Notes |
|---|---|---|
| Loop supply temperature | 60°C | Determined by the air system (typically 12.7778°C). |
| Loop return temperature | 43.33°C | Determined by the air system (typically between 12.7778°C and 18.3333°C by default). |
Configuration
The hot water loop is comprised of 2 main components.
- Boiler
- Pump
Boiler
The boiler has operating temperatures typical of a condensing-style boiler.
| Property | Value | Notes |
|---|---|---|
| Leaving water temperature | 60°C | Determined by the loop design above. |
| Thermal efficiency | 0.92 | |
| Flow control | Variable | Modulates flow to meet set point. |
Pump
The pump has the following assumptions when it is in the default configuration.
| Pressure rise | 179344.014 Pa | |
| Motor efficiency | 90% | |
| Flow type | Variable speed | |
| Flow control | Intermittent | Only runs when there is demand. |