General Information
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We reserve the right to make any changes due to technical modifications!
Boiler Installation and Maintenance Manual SB735 • Issue 10/2003
Buderus Heiztechnik GmbH • http://www.heiztechnik.buderus.de
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General Information
1.1
General Information
This Boiler Installation and Maintenance Manual
contains important information regarding proper and
safe assembly, start-up and operating and maintenance
procedures for the SB735 series boilers!
The assembly and maintenance instructions are
designed for the installing contractor, who, due to
vocational training, is familiar, knowledgeable and
experienced in heating system and gas piping
installations.
1.2
Regulations and Guidelines
This document also makes reference to additional
accessories that may be used in conjunction with the
SB735 boilers. Observe the proper installation
instructions when installing these accessories.
The installation must conform to the requirements of the
authority having jurisdiction or, in absence of such
requirements, to the latest edition of the National Fuel
Code, ANSI Z223.1.
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DANGER!
due to combustion products.
Route flue gases via venting system to the
atmosphere. Use only approved venting
materials.
Have the system inspected by an authorized
person prior to start-up. Only start-up the
system after approval.
Check system for leaks.
The Buderus SB735 boiler is a condensing boiler
suitable for firing with natural gas or propane only.
The installation of a low water cut-off and pressure relief
valve must be based on local code requirements. Please
install these components per manufacturer’s
instructions and per detail on page 23.
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NOTICE
To avoid build-up of debris inside the heat
exchanger of the boiler, it is recommended to
install a filter on the boiler return connection(s).
1.3
Hydrostatic test
Perform a hydrostatic test. The test pressure should be
1.5 times the actual operating pressure in the heating
system, however a minimum of 14 psi.
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NOTICE!
Observe the listed boiler output ratings as
shown on the boiler rating plate.
Maximum Temperature and Pressure Ratings:
Permissible Fuels:
Logano SB735: Fuel Natural Gas or L.P
Please observe the guidelines of the gas supply
company!
Maximum Temperature and Pressure Ratings
Maximum Supply Temperature:
210 °F
Allowed System Pressure
(Models)
790
43.5 psi
970
43.5 psi
1200
43.5 psi
Maximum Time constant:
- Manual Reset High Limit
40 sec
- Adjustable High Limit
40 sec
Table. 1 Maximum Temperature and Pressure Ratings
