Installation instructions
3Installation instructions
3.1Tools required for installation
•Philips head screwdriver
•Flat head screwdriver
•Adjustable wrench
•Level
•Thermometer
•Standard plumbing tools
•Manometer
•Drill
•Pipe wrench
•Adjustable pliers
•Pipe fitting tools
•Hacksaw
•Hole saw.
3.2Introduction
Please follow these instructions. Failure to follow instructions may result in:
BDamage or injury.
BImproper operation.
BLoss of warranty.
If you are unable to perform the tasks required to install this heater properly, please contact a locally licensed plumber or gas technician.
Common installation practice is to deter-
imine the venting/intake system layout and penetration and then work back to the heater.
3.3Venting 
Warning: Do not reduce the vent (exhaust and combustion) pipe sizes and do not common vent with any other vented appliance or stove.
Warning: Failure to vent the exhaust gases to the outside with sealed stainless steel vent pipe
Warning: Do not mix vent pipe or
joining methods from different manufacturers.
Warning: Approved terminators must be used for inlet and exhaust vent sys- tems to prevent rain from entering the appliance. Failure to do so may result in damage to the appliance. This failure is not covered under the manufacturer’s warranty.
Caution: The vent system must be installed by a qualified installer in accordance with these instructions. If improperly installed, a hazardous condition such as explosion or carbon monoxide poisoning could result. Bosch Water Heating will not be responsible for improperly installed appliances.
Warning: In areas where outside temperatures routinely come close to freezing, sealed combustion operation is required. Use separate terminations for combustion and vent, which must be installed on the same wall or roof surface, however never facing the direction of prevailing winds. Failure to do so may result in heat exchanger freezing up and bursting. This failure is not covered under the manufacturer's warranty.
3.3.1Vent material
Establish vent clearances that comply with the vent manufacturer's specifications. In all cases, follow local codes. See Table 2.
| Diam. | Material |
|
|
|
Exhaust | 3 or 4 inches | Sealed single wall stainless steel |
Vent |
| |
|
|
|
Intake | 3 or 4 inches | Sealed PVC or any other rigid pipe |
Vent |
|
|
|
|
|
Table 2 Venting Specifications
6 720 608 542 | 9 |