A.O. Smith 400, 401, 402, 403, 404, 405

Figure 17. CCB CENTRAL CONTROL BOARD

Contents

Main COPPER BOILERS FOR HYDRONIC HEATING AND HOT WATER SUPPLY Thank You CAUTION Installation Operation Maintenance Limited Warranty Instruction Manual GB/GW MODELS: DIMENSIONS/CAPACITIES DAT A Figure 1. TABLE 2. DIMENSIONAL DAT A TABLE 1: GAS AND ELECTRICAL REQUIREMENT DIMENSIONS DATA FOR OUTDOOR CONFIGURATION Figure 2. TABLE 3. DIMENSIONAL DATA TABLE 5: PUMPING PERFORMANCE GUIDE TABLE 4: RECOVERY CAPACITIES FOREWORD GB MODELS-FLOW, HEAD LOSS AND TEMPERATURE RISE HIGH ALTITUDE INSTALLATION FEATURES/CONTROLS MULTI-STAGE FIRING AND CONTROL SYSTEM GROUNDING INSTRUCTIONS CORRECT GAS PRECAUTIONS DIFFERENTIAL PRESSURE SWITCH BLOCKED FLUE PRESSURE SWITCH FLAME SENSOR WATER FLOW SWITCH LIMIT CONTROLS INSTALLATION INSTRUCTIONS REQUIRED ABILITY LOCATION WARNING CHEMICAL VAPOR CORROSION INSTALLATION CLEARANCES LEVELLING AIR REQUIREMENTS WARNING VENTING HORIZONTAL VENT INSTALLATION CAUTION SYSTEM INSTALLATION GENERAL INSTALLATION AS BOILER REPLACEMENT STANDARD VENT - VERTICAL (CATEGORY I) STANDARD VENT - HORIZONTAL (CATEGORY III) DIRECT VENT - VERTICAL (CATEGORY I) DIRECT VENT - HORIZONTAL (CATEGORY III) HYDRONIC INSTALLATION WATER SUPPLY LINE CONVENTIONAL SPACE HEATING INSTALLA TION BYPASS BALANCING AIR SEPARATOR INTERNAL CONTAMINANTS SPACE HEATING APPLICATIONS HOT WATER SUPPLY BOILER INSTALLATION WATER LINE CONNECTIONS HARD WATER CONDITIONS TANK PROBE INSTALLATION PROCEDURE GAS CONNECTIONS WARNING ONE GENESIS (MODEL GW) HOT WATER SUPPLY BOILER WITH HORIZONTAL TANK ONE GENESIS (MODEL GW) HOT WATER SUPPLY BOILER WITH VERTICAL TANK Figure 13. Single boiler with vertical tank. TABLE 15. Suggested Pipe Size For Multiple Gas Appliances (Natural) TABLE 16. Suggested Pipe Size For Multiple Gas Appliances (Propane Gas) Length of Pipe in Feet (Metres) (based on 0.60 Specific Gravity Gas w/Heating Value of 1,000 BTUs/Ft Length of Pipe in Feet (Metres) WIRING CONNECTIONS TABLE 17. SINGLE UNIT INSTALLATION, SUGGESTED PIPE SIZE Page Page Page Page Page Page Page Page OPERATION GENERAL FILLING AND PURGING WATER SYSTEM (B.) Hot Water Supply Installation: PURGING OF GAS LINE FOR YOUR SAFETY READ BEFORE OPERATING OPERATING INSTRUCTIONS TO TURN OFF GAS TO APPLIANCE Lighting Instructions for the G(B/W) 1000 through 2500 models FOR YOUR SAFETY READ BEFORE OPERATING OPERATING INSTRUCTIONS TO TURN OFF GAS TO APPLIANCE CONTROL SYSTEM MANIFOLD PRESSURE ADJUSTMENTS DANGER Page Page Operating Sequence Page Page Page OPERATING SETPOINT ADJUSTMENT PROCEDURE TROUBLESHOOTING IGNITION SYSTEM Page PREVENTATIVE MAINTENANCE MAIN BURNERS WARNING DELIMING CAUTION REPLACEMENT PARTS NEW BOILER LIMITED WARRANTY

A.O. Smith - page 28

Models: 400 401 402 403 404 405