SDT/SET Installation & Operation Manual
8Performance Data
Table 8A SET Backup Recovery Performance
| Heat Exchanger | Heated | Recovery | * First Draw | ||||
| Volume | Water |
| Back Up |
| Gallons | ||
Model | Gallons | Volume |
| Minutes |
|
|
| |
|
|
|
|
|
| |||
| Solar | Gallons | 65°F Rise |
| 90°F Rise | 115°F |
| 140°F |
|
|
|
| |||||
|
|
|
|
|
|
|
|
|
SET065 | 2.2 | 28 | 78 |
| 108 | 34 |
| 26 |
|
|
|
|
|
|
|
|
|
SET080 | 2.2 | 35 | 89 |
| 123 | 44 |
| 31 |
|
|
|
|
|
|
|
|
|
SET119 | 3.2 | 44 | 120 |
| 166 | 55 |
| 42 |
|
|
|
|
|
|
|
|
|
Table 8B | SDT Backup Recovery Performance |
|
|
|
|
|
| ||||
|
|
|
|
|
|
|
|
|
|
| |
|
| Heat Exchanger | Heated | Recovery | Boiler | * First Draw | |||||
|
|
| Volume | Back Up | |||||||
Model |
|
| Water | Output for |
| Gallons | |||||
|
| Gallons | Minutes |
| |||||||
|
| Volume | Recovery |
|
|
| |||||
|
|
|
|
|
|
|
|
|
| ||
|
| Boiler |
| Solar | Gallons | 65°F Rise | 90°F Rise | BTU/HR | 115°F |
| 140°F |
|
|
|
|
|
|
|
|
|
|
|
|
SDT065 |
| 1.9 |
| 2.2 | 32 | 8 | 13 | 128,000 | 42 |
| 30 |
|
|
|
|
|
|
|
|
|
|
|
|
SDT080 |
| 1.9 |
| 2.2 | 36 | 9 | 15 | 128,000 | 49 |
| 35 |
SDT119 |
| 2.6 |
| 3.2 | 53 | 10 | 17 | 217,000 | 65 |
| 50 |
*Amount of water drawn from tank with no energy input
How to Properly Size Your Indirect Water Heater
Use the First Hour Rating (FHR) to properly size your Indirect Water Heater. The FHR is the amount of hot water in gallons the water heater can supply in the first hour of operation (starting with a tank full of hot water). The FHR is dependent on tank capacity, source of heat, and the size of the burner.
The Indirect Water Heater and Boiler sizing charts can be found on pages 23 and 24. Locate your Indirect Water Heater and Boiler along with your required First Hour Rating. This will also determine the flow needed between the Indirect Water Heater and Boiler.
NOTICE
The charts utilize only the upper boiler coil and the upper half of the tank.
22 
