Hazard definitions
The following defined terms are used throughout this manual to bring attention to the presence of hazards of various risk levels or to important information concerning the life of the product.
Indicates presence of hazards that will cause severe personal injury, death or substantial property damage.
Indicates presence of hazards that can cause severe personal injury, death or substantial property damage.
Indicates presence of hazards that will or can cause minor personal injury or property damage.
Indicates special instructions on installation, operation or maintenance that are important but not related to personal injury or property damage.
Selection data
Controls
Domestic hot water
Refer to
Venting and combustion air
Ultra boilers must be vented individually. Combustion air must be piped to the boiler as well, but may be manifolded as shown on page 13. Follow
Additional considerations
1.Review the Ultra Boiler Manual and applicable supplements prior to designing and installing multiple-
2.Ultra boilers are
3.Ultra boilers are tested for 30 P.S.I. working pressure (higher pressure not available).
4.For systems requiring greater than 30 P.S.I. relief valve setting, install a heat exchanger to isolate the boilers from the main system. See page 12 for suggested piping.
5.Maximum operating temperature of each boiler is 190°F.
This manual provides general guidelines for piping and installation. Your installation must comply with all applicable local codes.
When using isolation valves on each boiler, some codes may require providing a low water control and additional limit for each boiler. If desired, consult the codes to determine if exclusion of the individual boiler isolation valves may allow the use of a single water level control and additional limit for the entire multiple boiler system.
Part number | 3 |
