Smith Cast Iron Boilers GT Series manual Contents, Before YOU Start, Boiler Ratings & Capacities

Page 2 GT INSTALLATION AND OPERATION INSTRUCTIONS

CONTENTS

Before You Start	page 2
Boiler Ratings & Capacities	page 2
Boiler Location	page 3
Clearances to Combustible Construction	page 3
Combustion Air	page 4
General Venting Guidelines	page 4
Horizontal Direct Vent Systems	page 5
Vertical Direct Vent Systems	page 9
Condensate Drain	page 10
General Plumbing Guidelines	page 11
Primary Loop Plumbing	page 13
Multiple Boiler Primary Loop Plumbing	page 13
Secondary Loop Plumbing	page 13
Gas Supply Piping	page 18
Electrical Wiring	page 19
Sentry 2100 Controller	page 26
Boiler Set Up	page 29
Operating Instructions	page 29
Boiler Checking & Adjusting	page 33
Gas Pressure Adjustment	page 33
Boiler Maintenance	page 34
Wall Hung Conversion	page 35
Trouble Shooting	page 36
Replacement Parts	page 41
BEFORE YOU START

WARNING: This manual must be read and fully understood before installing, operation or servicing this boiler! Failure to follow these instructions could result in a fire or explosion causing extensive property damage, personal injury or death!

These instructions cover the GT Series gas fired, direct vent, low pressure, hot water boiler. GT boilers have been design certified by CSA for use with natural and propane gas under the latest edition of ANSI-Z21.13/CSA 4.9, Gas-Fired Low Pressure Steam and Hot Water Boilers.

Each unit has been constructed and hydrostatically tested for a maximum working pressure of 30 psi, 207 kPa, in accordance with Section IV of the ASME Boiler and Pressure Vessel Code. Each boiler has been equipped with a 30 psi, 207 kPa pressure relief valve.

This manual covers the application, installation, operation and maintenance of a GT Series low pressure hot water boiler.

To obtain the safe, dependable, efficient operation and long life for which this boiler was designed, these instructions must be read, understood and followed.

Direct all questions to your Smith distributor or to the Customer Service Department, 260 North Elm Street, Westfield, MA 01085. Always include the model and serial numbers from the rating plate of the boiler in question.

The owner should maintain a record of all service work performed with the date and a description of the work done. Include the name of the service organization for future reference.

Where required by the authority having jurisdiction, the installation must conform to the Standard for Controls and Safety Devices for Automatically Fired Boilers, ANSI/ASME CSD-1.

The installation must conform to the requirements of the authority having jurisdiction or, in the absence of such requirements, to the National Fuel Gas Code, ANSI Z223.1-latest revision. In Canada, the installation must be in accordance with the requirements of CSA B149.1 or B149.2 Installation Code for Gas Burning Appliances and Equipment.

If installed in the Commonwealth of Massachusetts, you MUST FOLLOW the additional instructions contained in Smith’s instruction sheet MA IOM. If you don’t have a copy call your Smith distributor or Smith.

BOILER RATINGS & CAPACITIES

Before undertaking the installation of the GT check the boiler rating plate to ensure that the boiler is the proper size for the job.

Also ensure that the boiler has been set up for the type of gas available at the installation site. Other important considerations are the availability of an adequate electrical supply, fresh air for combustion and proximity a suitable outside wall.

High Altitude Operation

The GT boiler is designed to operate to capacity in installations with 2000 ft, 610 m of elevation or less. At elevations higher than 2000 ft, 610 m the unit will de-rate due to the lower air density, see Figure 1.

NOTE: It is the Installers responsibility to check the combustion, and to adjust the combustion in accordance to Operating Instructions Section.