BOSCH 330 PN User Guide and Instruction Manual
Summary
This detailed manual provides comprehensive guidance for the 330 PN Indoor Flow Modulated Water Heater, designed exclusively for heating potable water in variable flow applications using Natural or LP Gas. It guides users through everything from safe gas connection and placement requirements to proper operation, maintenance schedules, and advanced troubleshooting of common issues (e.g., pilot failure, fluctuating hot water). Essential reading material for qualified installers, service technicians, and end-users ensuring maximum operational safety and efficiency.
Page 1 Text Content
330 PN /0 INDOOR MODEL Flow Modulated with Standing pilot Suitable for heating potable water only - Not approved for space heating purposes (Intended for variable flow applications with steady cold water inlet temperatures)
330-PN-N - for use with Natural Gas 330-PN-L - for use with Liquefied Petroleum (LP) Gas
Warning: If the information in this manual is not What to do if you smell gas followed exactly, a fire or explosion may result
Close gas valve. Open windows.
causing property damage, personal injury or death.
Do not try to light any appliance.
Do not store or use gasoline or other flammable vapor and liquids in the vicinity of this or any other Do not touch any electrical switch; do not use any appliance. phone in your building.
Immediately call your gas supplier from a neighbor’s
Improper installation, adjustment, alteration,
phone. Follow the gas supplier’s instructions.
service or maintenance can cause injury or
If you cannot reach your gas supplier, call the fire
property damage. Refer to this manual. For
department.
assistance or additional information consult a qualified installer, service agency or the gas Installation and service must be performed by a supplier. qualified installer, service agency or the gas supplier. In the Commonwealth of Massachusetts this product must be installed by a licensed plumber or gas fitter.
Upon completion of the installation, these instructions should be handed to the user of the appliance for future reference.
Page Summary Contents For BOSCH 330 PN User Guide and Instruction Manual
Manual Details
| Brand | Bosch |
|---|---|
| Pages | 28 |
| File Size | 2.50 MB |
| Published | May 16, 2026 |
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Frequently Asked Questions
Does the unit support space heating?
No, it is suitable only for heating potable water and is not approved for space heating purposes.
What gas types can this heater operate with?
It supports Natural Gas (330-PN-N) or Liquefied Petroleum/LP Gas (330-PN-L).
What are the minimum plumbing requirements for installation?
The hot and cold water connections require a minimum size of 1/2” NPT, and the minimum recommended water pressure is 13 PSI.
How do I troubleshoot low hot water temperature or fluctuation?
Check section 6.7 (Water is too hot) and 6.8 (Water is not hot enough) in the troubleshooting guide for specific steps.