6 Drain
6.1 | Drain unvented | For some activities the device needs to be drained. Proceed as follows: | |
| installations | 1. | Electrically isolate the device by turning the main switch between the |
|
|
| device and the electricity mains to the 0 position. |
|
| 2. | Shut off the gas supply (10). |
|
| 3. | Close the stop valve (11) in the hot water pipe. |
|
| 4. | Close the stop valve (4) in the cold water pipe (A). |
|
| 5. | Connect the discharge hose to the drain valve (9). |
|
| 6. | Open the drain valve (9). |
|
| 7. | Aerate the device (or installation) allowing it to completely empty. |
6.2 | Drain vented | For some activities the device needs to be drained. Proceed as follows: | |
| installations | 1. | Electrically isolate the device by turning the main switch between the |
|
|
| device and the electricity mains to the 0 position. |
|
| 2. | Shut off the gas supply (10). |
|
| 3. | Close the stop valve (11) in the hot water pipe. |
|
| 4. | Close the stop valve (4) between de water tank and the cold water inlet (A). |
|
| 5. | Connect the discharge hose to the drain valve (9). |
|
| 6. | Open the drain valve (9). |
|
| 7. | Aerate the device (or installation) allowing it to completely empty. |
38 | Instruction manual TWI |
