A.O. Smith 201 - Manuals

6 probe is not supplied with the GB models. A tank probe can beused as an option to control loop temperature and unit staging.Additionally, the Inlet Temperature Probe can be used as the loopthermostat in some heating (GB) applications. These types ofcontrols connect to designated wires in the junct...

7 • THE BOILER MUST NOT BE INSTALLED ON CARPETING. • THE BOILER SHOULD NOT BE LOCATED IN AN AREA WHEREIT WILL BE SUBJECT TO FREEZING. • THE BOILER SHOULD BE LOCATED NEAR A FLOOR DRAIN. • THE BOILER SHOULD BE LOCATED IN AN AREA WHERELEAKAGE FROM THE BOILER OR CONNECTIONS WILL NOTRESULT IN DAMAGE TO T...

8 PROVIDED FOR PROPER COMBUSTION AND VENTILATION INACCORDANCE WITH THE NATIONAL FUEL GAS CODE, ANSIZ223.1 OR CAN/CSA-B149.1 AND .2 (LATEST EDITIONS) ORAPPLICABLE PROVISIONS OF THE LOCAL BUILDING CODES.AN INSUFFICIENT SUPPLY OF AIR MAY RESULT IN A YELLOW,LUMINOUS BURNER FLAME, CARBONING OR SOOTING OF...

9 1. Seal any unused opening in the common venting system.2. Visually inspect the venting system for proper size and horizontal pitch and determine there is no blockage or restriction, leakage,corrosion or other unsafe condition. 3. I s o l a t e t h e s p a c e c o n t a i n i n g t h e a p p l i a...

10 STANDARD VENT - VERTICAL (CATEGORY I) IMPORTANT! VENT PRESSURE MUST BE MAINTAINED BETWEEN -0.02" W.C. AND -0.04" W.C. AT 24" (61.0 cm) ABOVE BOILER COLLAR. • Connection for the appliance exhaust vent to the stack must be as direct as possible. Maximum and minimum venting lengthfor Cat...

13 DIRECT VENT - HORIZONTAL (CATEGORY III) WARNING: No substitutions of flue pipe or vent cap material are allowed. Such substitutions would jeopardize the safety and health of inhabitants. • A maximum of two elbows can be used on inlet and outlet vent piping respectively. Each elbow is equal to 10 ...

14 STANDARD (VERTICAL) VENTING, CATEGORY I THIS BOILER MAY BE VENTED ACCORDING TO TABLE 7 (ALSOSEE FIGURE 5). AT LEAST TYPE B VENTING MUST BE USEDWITH THE STANDARD VENTING OPTION (thru-the-roof) USINGTHE NATIONAL FUEL GAS CODE VENT TABLES.* TYPE B VENTP I P E C A N N O T B E U S E D I F T H E B O I ...

15 CONVENTIONAL SPACE HEATING INSTALLATION Modern fin type boilers are exceptionally fast heating units. The lowwater volumes in relation to firing rates require special attention tow a t e r f l o w r a t e s f o r s m o o t h , e f f i c i e n t o p e r a t i o n . T h e s econsiderations for the ...

16 Figure 10. Single or Multiple Boiler Installation Diagram The circuits should be spaced on the header at a minimum of3" (7.6 cm) center to center. Install a balancing cock in each returnline. Manifold headers are recommended for split systems with orw i t h o u t z o n e v a l v e s a n d a l...

17 mandatory but offers smooth, efficient operation of a modernsystem. Normal use of flow control valves is required to prevent crosscirculation of zones as with any multiple pump system. Large systems with multiple boilers should include main watertemperature controls (with or without outdoor reset...

18 ONE GENESIS (MODEL GW) HOT WATER SUPPLY BOILER WITH HORIZONTAL TANK Figure 12. Tank probe installation. PRESSURE RELIEF VALVE RATING SHOULDNOT EXCEED PRESSURE CAPACITY OF ANYCOMPONENT IN THE SYSTEM. PIPING SHOULD CONFORM TO LOCAL CODES. BALL VALVES ARE SHOWN FOR SERVICINGB O I L E R . H O W E V E...

19 ONE GENESIS (MODEL GW) HOT WATER SUPPLY BOILER WITH VERTICAL TANK Figure 13. Single boiler with vertical tank. PRESSURE RELIEF VALVE RATING SHOULD NOT EXCEED PRESSURE CAPACITY OF ANY COMPONENT IN THE SYSTEM. PIPING SHOULD CONFORM TO LOCAL CODES. BALL VALVES ARE SHOWN FOR SERVICING BOILER. HOWEVER...

20 T able 13. Suggested Pipe Size For Multiple Gas Appliances (Natural) T able 14. Suggested Pipe Size For Multiple Gas Appliances (Prop ane Gas) Length of Pipe in Feet (Metres) Maximum Cap acity of Pipe in BTU/hr and kW for Gas Pressures of 14 in. W .C. (0.5 p si) or Less and a Pressure Drop of 0.5...

21 GAS CONNECTIONS WARNING THIS BOILER IS NOT INTENDED TO OPERATE AT GAS SUPPLYPRESSURE OTHER THAN SHOWN ON THE RATING PLATE.EXPOSURE TO HIGHER GAS SUPPLY PRESSURE MAY CAUSEDAMAGE TO GAS VALVES WHICH CAN RESULT IN FIRE OREXPLOSION. IF OVERPRESSURE HAS OCCURRED SUCH ASTHROUGH IMPROPER TESTING OF GAS ...

22 WIRING CONNECTIONS ALL ELECTRICAL WORK MUST BE INSTALLED IN ACCORDANCE W I T H T H E M O S T R E C E N T V E R S I O N O F T H E N AT I O N A L ELECTRICAL CODE/CANADIAN ELECTRICAL CODE AND MUST CONFORM TO LOCAL REGULATIONS. AN ELECTRICAL GROUND IS REQUIRED TO REDUCE RISK OF ELECTRIC SHOCK OR POSS...

23 PURGING OF GAS LINE Gas line purging is required with new piping or systems in whichair has entered. CAUTION P U R G I N G S H O U L D B E P E R F O R M E D B Y P E R S O N SEXPERIENCED IN THIS TYPE OF GAS SERVICE TO AVOID RISKOF FIRE OR EXPLOSION. PURGE DISCHARGE MUST NOTENTER CONFINED AREAS OR ...

24 Lighting Instructions for the G(B/W) 1000 through 2500 models A. THIS APPLIANCE DOES NOT HAVE A PILOT. IT IS E Q U I P P E D W I T H A N I G N I T I O N D E V I C E W H I C HAUTOMATICALLY LIGHTS THE BURNER. DO NOT TRY TOLIGHT THE BURNER BY HAND. B. BEFORE LIGHTING: SMELL ALL AROUND THE APPLIANCE ...

26 CONTROL SYSTEM DESCRIPTION OF MULTI-STAGE FIRING SYSTEM The Central Control Board (CCB) is responsible for staging theIgnition Control Boards (ICB) and monitoring safety limit devices,control of circulation pump, power vent, alarm output and IRI gasvalves (only on IRI models). The thermostat also...

30 Procedure for Setting Pump Delay The Controller is factory set with a 45 second post circulate function. With the Display Board, the user has the capability to choosebetween a 45, 90, or 180 second post circulate time period, or turnthe pump on continuously. This provides flexibility in selecting...

31 drop out first followed by stages three, two and one. To achievemaximum efficiency, stages will reignite if the system watertemperature drops below the stage Set Point minus the SetPoint Differential. Note: Once a stage is satisfied, the blower associated with thatstage will allow a 25 second pos...

32 with this boiler should receive periodic (every six months) inspectionto assure proper operation. A low water cutoff device of the floattype should be flushed every six months. Periodic checks, at leasttwice a year, should be made for water and/or gas leaks. More frequent inspections may be neces...

33 CAUTION IF HEAT EXCHANGER MAINTENANCE REQUIRES TUBINGREPLACEMENT, SPECIAL PROVISIONS SHALL BE TAKEN TOE N S U R E T H AT T H E D A M A G E D T U B E S A R E C A R E F U L LYREMOVED. REPLACEMENT TUBES MUST BE PROPERLY INSTALLED ANDEXPANDED INTO THE ROLLED TUBE TUB. OVER-ROLLING, MISALIGNMENT OF TU...

35 NEW BOILER LIMITED WARRANTY A. O. Smith Corporation, the warrantor, extends the following LIMITED WARRANTY to the owner of this hydronic boiler: 1. If within TEN years after initial installation of the boiler, the heat exchanger shall prove upon examination by the warrantor to be defective in mat...

36 REPLACEMENT PARTS 5621 W. 115TH STREET, ALSIP, IL 60803 Phone: 800-433-2545 Fax: 800-433-2515 www.hotwater.com E-Mail: [email protected]