A.O. Smith HWB-420 - Manual
A.O. Smith HWB-420 – Manual, read for free online in PDF format. We hope this helps you resolve any issues you may have. If you have further questions, please contact us through the contact form.
Table of Contents:
- Page 4 – CAUTION; FOREWORD; TABLE OF CONTENTS; INSTALLATION INSTRUCTIONS; REQUIRED ABILITY
- Page 5 – LOCATION; THE BOILER MUST NOT BE INSTALLED ON CARPETING.; AIR REQUIREMENTS; WARNING; / K W ) u p t o a n d i n c l u d i n g
- Page 6 – CHEMICAL VAPOR CORROSION; INSTALLATION CLEARANCES; TABLE 4; TOP; LEVELLING; A TYPICAL BOILER INSTALLATION
- Page 8 – SUGGESTED ITEMS FOR INSTALLATION; BOILER INLET - OUTLET SIZES; SCHEMATIC OF THE LINEAR-TEMP
- Page 9 – SCHEMATIC SHOWING PROPER PIPING ISOLATION; CIRCULATING PUMP; A TYPICAL CIRCULATING PUMP; GAS CONNECTIONS
- Page 10 – A. SIZING GAS SUPPLY LINE (For single boiler installations and; TABLE 6; B. SIZING GAS SUPPLY LINE (For multiples of over three boilers; PURGING; CORRECT GAS
- Page 11 – GAS PRESSURE REGULATORS
- Page 12 – VENTING THE BOILER - STANDARD VENTING; FIGURE 6; DRAFT HOOD; VENT PIPE INSTALLATION
- Page 13 – MULTIPLE VENT TABLE; FIGURE 8; CONNECTING BOILER TO A COMMON VENT
- Page 14 – TABLE 9, COMBINED VENT SIZING TABLES
- Page 15 – VENTING MAINTENANCE - STANDARD VENTING; VENTING SYSTEM; FIGURE 9; SAFETY RELIEF VALVES
- Page 16 – WIRING CONNECTIONS
- Page 19 – SINGLE STAGE PROPANE ROBERTSHAW GAS VALVE
- Page 22 – LINEAR-TEMP INSTALLATIONS; INSTALLATION FOR CANADIAN MODELS
- Page 25 – - FOR HOT WATER SUPPLY APPLICATION; CANADIAN MODELS, JUNCTION BOX W/6 TERMINALS; FOR HOT WATER SUPPLY APPLICATION
- Page 27 – SCHEMATIC
- Page 28 – CER-TEMP 80 - 2 OR 3 UNIT INSTALLATION CONNECTION DIAGRAM
- Page 29 – CER-TEMP 80 - 2 OR 3 UNIT INSTALLATION SCHEMATIC DIAGRAM
- Page 30 – BOOSTER - RECOVERY WIRING DIAGRAM; SHURE-TEMP BOOSTER - RECOVERY WIRING DIAGRAM
- Page 32 – DANGER; Some states; DETAIL OF TANK FITTING USED WITH MODIFIED RECOVERY
- Page 33 – LOW WATER CUTOFF
- Page 34 – *Assumes 50 equivalent feet pf piping or less.
- Page 40 – TWO TEMPERATURE SYSTEM WITHOUT RECIRCULATION
- Page 43 – INSTRUCTIONS FOR NUMBERED CONTROLS SHOWN ABOVE -
- Page 45 – START-UP AND OPERATING INSTRUCTIONS
- Page 46 – IMPORTANT; FILLING AND VENTING; PILOT AND MAIN BURNER
- Page 47 – HOT WATER CAN PRODUCE 3rd DEGREE; : I F Y O U D O N O T F O L L O W T H E S E I N S T R U C T I O N S; FOR YOUR SAFETY READ BEFORE OPERATING
- Page 48 – WA R N I N G : I F Y O U D O N O T F O L L O W T H E S E I N S T R U C T I O N S; FOR YOUR SAFETY READ BEFORE LIGHTING
- Page 49 – CLOSED CIRCUIT TEST
- Page 50 – PROTECTOR SWITCH CONTINUITY TEST; Protector switch contacts open.
- Page 51 – CONTROL SETTINGS; The high limit is a safety device; ELECTRONIC INTERMITTENT PILOT
- Page 52 – IN CANADA; THERMAL BALANCER
- Page 54 – SAFETY RELIEF VALVE MAINTENANCE; REPLACEMENT PARTS; the complete model and serial; REMOVAL OF EXISTING BOILER FROM A COMMON VENTING SYSTEM
- Page 55 – GENERAL MAINTENANCE; RELIEF VALVE; CLEANING AND FLUSHING INSTRUCTIONS; HOT WATER SUPPLY BOILERS
- Page 56 – DELIMING SOLVENTS; HEAVY LIME DEPOSITS
- Page 57 – TROUBLESHOOTING; CER-TEMP 80 RECOVERY SYSTEM CHECKOUT PROCEDURE
- Page 62 – LIMITED WARRANTY
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PLACE THESE INSTRUCTIONS ADJACENT TO BOILER AND
NOTIFY OWNER TO KEEP FOR FUTURE REFERENCE
A DIVISION OF A.O. SMITH CORPORATION
MC BEE, SC SEATTLE, WA
STRATFORD, ONTARIO
VELDHOVEN, THE NETHERLANDS
w w w. h o t w a t e r. c o m
PART NO. 211683-000 REV.02
PRINTED IN U.S.A. 0905
SUPERSEDES PART NO'S, 210288-000 REV. 01 & 192356-000
GAS-FIRED COMMERCIAL COPPER BOILERS FOR
HYDRONIC HEATING AND HOT WATER SUPPLY
•
INSTALLATION
•
OPERATION
•
MAINTENANCE
•
LIMITED WARRANTY
•
INDOOR ONLY
MODELS HW/HWB 300, 399, 420, 520, 610, 670
UP-FLOW MODELS
CAUTION
TEXT PRINTED OR OUTLINED IN RED CONTAINS INFORMATION
RELATIVE TO YOUR SAFETY. PLEASE READ THOROUGHLY
BEFORE USING APPLIANCE.
WARNING: If the information in this manual
is not followed exactly, a fire or explosion
m a y r e s u l t c a u s i n g p r o p e r t y d a m a g e ,
personal injury or death.
—
Do not store or use gasoline or other
flammable vapors and liquids in the
vicinity of this or any other appliance.
—
WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch;
d o n o t u s e a n y p h o n e i n y o u r
building.
• Immediately call your gas supplier
from a neighbor's phone. Follow the
gas supplier's instructions.
• If you cannot reach your gas supplier,
call the fire department.
— I n s t a l l a t i o n a n d s e r v i c e m u s t b e
p e r f o r m e d b y a q u a l i f i e d i n s ta l l e r,
service agency or the gas supplier.
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Summary
4 4 4 4 4 CAUTION TEXT PRINTED OR OUTLINED IN RED CONTAINS INFORMATION RELATIVETO YOUR SAFETY. PLEASE READ THOROUGHLY BEFORE USINGAPPLIANCE. Detailed installation diagrams are in this manual. These diagrams will serveto provide the installer with a reference for the materials and method ofpiping sug...
5 5 5 5 5 LOCATION When installing the boiler, consideration must be given to properlocation. Location selected should be as close to the stack orchimney as practicable with adequate air supply and as centralizedwith the piping system as possible. This location should also besuch that the gas igniti...
6 6 6 6 6 Where an exhaust fan is installed in the same room with a boiler,sufficient openings for air must be provided in the walls. UNDERSIZED OPENINGS WILL CAUSE AIR TO BE DRAWN INTOT H E R O O M T H R O U G H T H E C H I M N E Y, C A U S I N G P O O RCOMBUSTION. SOOTING MAY RESULT WITH AN INCREA...
