Table Of Contents; Installation Instructions; Required Ability; Installation As Boiler Replacement - A.O. Smith Burkay HW-300 Installation Operation & Maintenance

FOREWORD
TEXT PRINTED OR OUTLINED IN RED CONTAINS INFORMATION RELATIVE
TO YOUR SAFETY. PLEASE READ THOROUGHLY BEFORE USING
APPLIANCE.
Detailed installation diagrams are in this manual. These diagrams will serve
to provide the installer with a reference for the materials and method of
piping suggested. IT IS NECESSARY THAT ALL WATER AND GAS PIPING
AND THE ELECTRICAL WIRING BE INSTALLED AND CONNECTED AS
SHOWN IN THE DIAGRAMS.
CHECK THE DIAGRAMS THOROUGHLY BEFORE STARTING INSTALLATION
TO AVOID POSSIBLE ERRORS AND TO MINIMIZE TIME AND MATERIALS
COST.
This design complies with the latest edition of ANSI Z21.13.
CSA 4.9 low-pressure boiler.
Particular attention should be given to the installation of thermometers at

TABLE OF CONTENTS

ROUGH-IN DIMENSIONS ...................................................................
FOREWORD ......................................................................................
INSTALLATION INSTRUCTIONS ........................................................
Required Ability ..........................................................................
Installation As Boiler Replacement .............................................
Location ......................................................................................
Air Requirements ........................................................................
Chemical Vapor Corrosion .........................................................
Installation Clearances ...............................................................
Levelling ......................................................................................
System Connections ..................................................................
Gas Connections ........................................................................
Gas Pressure Regulators .......................................................... 11-12
Venting The Boiler - Standard Venting ....................................... 12-14
Venting Maintenance - Standard Venting ..................................
Venting Sidewall (Optional) Power Vent System ......................
Venting System ..........................................................................
Safety Relief Valves .................................................................. 15-16
Wiring Connections .................................................................... 16-31
Water Line Connections .............................................................
Hard Water .................................................................................
Tank Temperature Control .......................................................... 32-33
Low Water Cutoff ......................................................................
Thermometers ............................................................................
Drain Valve (Not Supplied) .........................................................
Closed Water System ................................................................
Piping Diagrams .......................................................................... 34-45

INSTALLATION INSTRUCTIONS

REQUIRED ABILITY

INSTALLATION OR SERVICE OF THIS BOILER REQUIRES ABILITY
EQUIVALENT TO THAT OF A LICENSED TRADESMAN IN THE
FIELD INVOLVED. PLUMBING, AIR SUPPLY, VENTING, GAS
SUPPLY AND ELECTRICAL WORK ARE REQUIRED.

INSTALLATION AS BOILER REPLACEMENT

Installation as boiler replacement on an old system with large
water volume may experience condensation within the boiler on
cold starts. This condensing of water vapor in the combustion
area can be prevented if a portion of the system water flow is
diverted past the boiler to cause an increase in boiler temperature
rise.
CAUTION
the locations indicated in the diagrams as these are necessary for checking
the operation of the boiler.
MAKE SURE THE GAS ON WHICH THE BOILER WILL OPERATE IS THE
SAME AS THAT SPECIFIED ON THE UNIT RATING PLATE.
The boiler installation must conform to these instructions and the
requirements of the local authority having jurisdiction.
Where required by authority having jurisdiction, the installation must conform
to the Standard for Controls and Safety Devices for Automatically Fired
Boilers, ANSI/ASME CSD-1.
In absence of local code requirements, the boiler installation must conform
to the National Fuel Gas Code, ANSI Z223.1 and/or CAN/CSA B-149.1-00

Installation Codes.

These manuals can be purchased from the CSA International, 8501 East
Pleasant Valley Road, Cleveland, OH 44131 or 178 Rexdale Boulevard,
Toronto, Ontario Canada M9W1R3.
PAGE
START-UP AND OPERATING INSTRUCTIONS ..................................
2-3
Filling And Venting ......................................................................
4
Pilot and Main Burner .................................................................
4
Lighting Instructions ................................................................... 47-48
4
Pilot and Main Burner (Continued) ............................................. 49-51
4
Electronic Intermittent Pilot Ignition Control .................................
5
Normal Operating Sequence With Honeywell S-8600H or
5-6
S-8610M Intermittent Ignition Control (I.I.D.) ...............................
6
High Altitude Installations ...........................................................
6
Thermal Balancer .......................................................................
6
Coil High Limit Control (Protector Switch) .................................. 52-53
6-9
Pressure Reducing Valve ..........................................................
Safety Flow Switch ................................................................... 53-54
9-11
Safety Relief Valve Maintenance ...............................................
Replacement Parts .....................................................................
REMOVAL OF EXISTING BOILER FROM A COMMON
15
VENTING SYSTEM ............................................................................
15
GENERAL MAINTENANCE ................................................................
15
Relief Valve ................................................................................
CLEANING AND FLUSHING INSTRUCTIONS ....................................
Internal Contaminants .................................................................
32
Hot Water Supply Boilers - Preventive Maintenance ................
32
Deliming ....................................................................................... 55-56
Deliming Solvents .......................................................................
33
Heavy Lime Deposits .................................................................
33
Removing Silicate .......................................................................
33
PRE-TROUBLE-SHOOTING ...............................................................
33
TROUBLE-SHOOTING ....................................................................... 57-61
LIMITED WARRANTY ........................................................................
With old systems where water temperature can be expected to
drop appreciably due to long standby periods, a bypass pipe of at
least 1" size with a balancing cock should be installed between
the boiler inlet and outlet. When the system first starts, the valve
should be slowly opened until the condensing ceases. This
adjustment remains at a permanent setting to establish required
temperature rise across the boiler.
The equipment shall be installed in accordance with those
installation regulations in force in the local area where the
installation is to be made. These shall be carefully followed in all
cases. Authorities having jurisdiction shall be consulted before
installations are made.
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